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Petrographic and diagenetic study of siliciclastic Jurassic sediments from the northeastern margin of Africa: Implication for reservoir quality J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-05 Ahmed A. Kassem; Walid S. Hussein; Ahmed E. Radwan; Nasr Anani; Mohamed Abioui; Sreepat Jain; Amer A. Shehata
Northeastern Egypt is one of the most important exposures in the Middle East and North Africa to study Jurassic facies. The present study analyzes 130 thin sections from a subsurface well (Well X) in the northern Gulf of Suez, and from two surface sections at Gebel Maghara (north Sinai) and Khashm Elgalala (North Eastern Desert), Egypt for petrographic and lithofacies analyses. In the present study
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Formation conditions and evolution of fractures in multiple tight rocks: Implications for unconventional reservoir exploitation J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-07 Shijing Chen; Yang Liu; Jinchuan Zhang; Pei Li; Xuan Tang; Zhongming Li; Zhe Dong; Longfei Xu; Xingxu Zhao
Physical simulation experiments of rock fracturing can effectively simulate the extension of artificial fractures within different lithology and interbedded rocks. Previous studies have focused on the conditions of artificial fracture initiation and propagation, while few studies have been conducted on the evolution and influencing factors of fractures in reservoir rocks. In this study, fracture evolution
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Improving facies prediction by combining supervised and unsupervised learning methods J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2020-12-29 Marco Ippolito; John Ferguson; Fred Jenson
Facies classification from well logs is an indispensable part of seismic interpretation and is important in the determination of sequence stratigraphy and ultimately reservoir characterization. Although there have been improvements in the tools used to perform this task, it remains laborious, subjective, and error-prone. Achieving a proper classification is complicated by increasing dataset sizes as
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Investigation on the time-dependent characterization of stimulation behaviors for the shale under fracturing fluid invading J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-09 Han Cao; Qiang Gao; Ting Bao; Shaohe Zhang; Yu Chen; Pinghe sun
In order to understand the time-dependent characteristics of stimulation behaviors during hydraulic fracturing, the self-developed hydraulic fracturing monitoring system under triaxial loading was employed to investigate the cracks' propagation under shale-fluid coupling process. The results reveal that with different duration of fracturing fluid invasion, the pressurization rate of fluid pressure
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Fluid flow through anisotropic and deformable double porosity media with ultra-low matrix permeability: A continuum framework J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-09 Qi Zhang; Xia Yan; Jianli Shao
Fractured porous media or double porosity media are common in nature. At the same time, accurate modeling remains a significant challenge due to bi-modal pore size distribution, anisotropy, multi-field coupling, and various flow patterns. This study aims to formulate a comprehensive coupled continuum framework that could adequately consider these critical characteristics. In our framework, fluid flow
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On hydrogen wettability of basaltic rock J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-11 Ahmed Al-Yaseri; Nilesh Kumar Jha
One of the major challenges pertaining to a full hydrogen economy is hydrogen storage in the Earth's subsurface formations, such as deep saline aquifers and depleted oil and gas reservoirs. Generally, sedimentary basins are considered for this purpose due to their potential for large-scale storage. However, basaltic formations are also in comparable proportions having voluminous volcanic rocks, vast
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Gelation kinetics of PAM/PEI based drilling mud for lost circulation applications J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-15 Musaab I. Magzoub; Mohamed Shamlooh; Saeed Salehi; Ibnelwaleed Hussein; Mustafa S. Nasser
The problem of lost circulation is a direct consequence of the presence of fractures or high permeability. Lost circulation material (LCM) is used to treat the loss that occurs or proactively strengthen the wellbore of the potential loss zones. The polyacrylamide (PAM)/Polyethylenimine (PEI) cross-linkable polymer gel is proven to work best in zone-sealing and plugging applications. In addition to
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In-situ 4D visualization and analysis of temperature-driven creep in an oil shale propped fracture J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-09 Marco Voltolini
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A new look at rock mechanical behavior from the meso-scale grain J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-10 Hao Yu; Arash Dahi Taleghani; Zhanghua Lian
The mechanical behavior of the rock at the macro-scale depends significantly on its granular meso-scale structure as well as properties of each mineral component. Current methods only calibrate the mechanical properties from different macro-scale samples, which certainly introduces limitations to recognize the realistic physics behind rock failure. To address this problem, theoretical analyses of meso-scale
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Design and application of new impeller-type wax-proof device based on speed-increasing wax-proof mechanism J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-15 Zi-ming Feng; Yi Sun; Xiaolei Liu; Wei Cui; Weibo Duan
Wax deposition in oil wells seriously affects hydrocarbon production and causes inevitable economic losses. Especially in rodless pumping wells, due to the lack of the stirring effect of the sucker rod, the waxing of the tubing is more serious. According to the correlation law between flow velocity and wax deposition, a speed-increasing impeller wax prevention device was designed. Based on fluid dynamics
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Influence of temperature on the interaction of metal veins and hydraulic fractures in shale formations: Experiment and simulation J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-09 Shaobo Han; Xiaodong Hu; Fujian Zhou; Yang Qiu; Minghui Li; Guopeng Huang
In the field construction of shale oil (gas) hydraulic fracturing, the veins present in the shale may deflect the propagation path of hydraulic fractures. The metal chalcopyrite veins are widely contained in Jimusar Shale, but the effect of the metal veins on the fracture propagation at different temperatures is still unclear. Based on the extended finite element simulation and semicircular bending
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Organic matter accumulation of the early Cambrian black shales on the flank of Micangshan-Hannan Uplift, northern upper Yangtze Block, South China J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-09 Zixuan Liu; Detian Yan; Xuebin Du; Shuangjian Li
The Micangshan-Hannan Uplift area is proved a new shale gas exploration area with massive potential of Niutitang Formation in the past three years. Nevertheless, the organic matter enrichment mechanisms of this set of organic-rich shales lack discussion. Here, eighty-two samples of a drilling well from the Micangshan-Hannan Uplift, Upper Yangtze Block, South China were investigated for the organic
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TGA and DSC investigation of different clay mineral effects on the combustion behavior and kinetics of crude oil from Kazan region, Russia J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-16 Mustafa Verşan Kök; Mikhail A. Varfolomeev; Danis K. Nurgaliev
In this research, the effect of different clay minerals (bentonite, illite and kaolinite) on the combustion behavior and kinetics of crude oils from Kazan region (Russia) was studied using thermogravimetry (TGA) and differential scanning calorimeter (DSC). The ramped temperature experiments were performed at constant heating rates (10, 20 and 30 °C/min) under air atmosphere. In both TGA and DSC experiments
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A predictive method for constructing the distillation curve of petroleum fluids using their physical bulk properties J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-16 Pouya Hosseinifar; Hamidreza Shahverdi
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Quantitative analysis of geological attributes for reservoir heterogeneity assessment in carbonate sequences; a case from Permian–Triassic reservoirs of the Persian Gulf J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-16 Parisa Tavoosi Iraj; Hamzeh Mehrabi; Hossain Rahimpour-Bonab; Rasoul Ranjbar-Karami
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Machine learning-assisted production data analysis in liquid-rich Duvernay Formation J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-16 Bing Kong; Zhuoheng Chen; Shengnan Chen; Tianjie Qin
The production of gas and oil from the unconventional tight and shale reservoirs is the outcome through a series of cooperative efforts of drilling, completion, and production operations. This study aims to optimize these operations to enhance the well productivity and oil recovery, and ultimately to reduce the development footprint on the level of individual wells. More specifically, a comprehensive
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Study of materials to combat loss of circulation in fractures and static filtration J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-14 Andréia Silveira Freire Soares; Ana Maria Furtado de Sousa; Luis Américo Calçada; Claudia Mirian Scheid; Mônica Regina Costa Marques
For the obstruction and reinforcement of permeable rocks (pores and or fractures), materials to combat loss of circulation (LCMs) are commonly used in the drilling fluid. LCMs, when forming bridges, support and seal rocks, with the objective of preventing drilling fluid from reaching the reservoir. In this study, drilling fluid formulations were developed using full four-level factorial design (DOE)
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Experimental investigation on the breakdown behaviours of sandstone due to liquid nitrogen fracturing J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-16 Chengzheng Cai; Zhixiang Tao; Keda Ren; Shuang Liu; Yugui Yang; Yinrong Feng; Shanjie Su; Peng Hou
Liquid nitrogen (LN) fracturing is an efficient technology for the development of unconventional gas resources. Due to continuous injection of cryogenic LN, the reservoir temperature decreases and then cooled rock regions are gradually generated during fracturing process. To investigate the breakdown behaviours of sandstone induced by LN fracturing, laboratory simulation experiments were performed
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Experimental investigation of the effects of ultrasonic stimulation on adsorption, desorption and seepage characteristics of shale gas J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-19 Jie Zhang; Wen Luo; Tingyu Wan; Zhiwei Wang; Tianyu Hong
To verify the feasibility of applying ultrasonics to enhancing gas production from shale gas reservoirs, experimental study on the effects of ultrasonics on adsorption, desorption and seepage characteristics of shale gas using four samples from Sichuan Basin has been carried out. Adsorption and desorption of methane, were tested by volume method under different conditions, while the permeabilities
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Experimental Investigation on Hydration Mechanism of Sichuan Shale (China) J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-22 Jingping Liu; Zhi Yang; Jinsheng Sun; Zhiwen Dai; Kaihe Lv; Qing You
During the drilling in shale reservoirs using water-based drilling fluids, shale hydration leads to various risks such as wellbore collapse and stuck drills. However, the mechanism of shale hydration remains unclear. This work presents a comprehensive experimental investigation on the mechanisms of shale hydration using core samples of Sichuan shale (China), with a high content of illite. The impact
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Double-Chain Single-Head modification of extracted saponin from Anabasis Setifera plant and its effects on surfactant-alkali slug injection into carbonate oil reservoirs J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-22 Iman Nowrouzi; Amir H. Mohammadi; Abbas Khaksar Manshad
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Triaxial experimental investigation into the characteristics of acid-etched fractures and acid fracturing J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-22 Hao Li; Yongmin Shi
A high-strength pressure-resistant material and acid-resistant thickener are developed, and natural cores extracted from the Changqing Oilfield in China are wrapped in three dimensions to study the initiation, propagation, and characteristics of cracks. Conventional hydraulic fracturing, acid fluid fracturing, and thickener compound acid fluid fracturing were carried out through physical and numerical
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Class C fly ash-based alkali activated cement as a potential alternative cement for CO2 storage applications J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-22 Priyesh Jani; Abdulmohsin Imqam
Long-term storage of carbon dioxide (CO2) inside depleted reservoirs can help reduce the impact of greenhouse gas emissions. Portland cement has been shown to degrade significantly during long-term contact with CO2. This research aims to provide a new environmentally friendly, Class C fly ash-based cement as a potential alternative to Portland cement for CO2 storage wells. This was achieved by comparing
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Multiscale characterization of shale pore-fracture system: Geological controls on gas transport and pore size classification in shale reservoirs J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-22 Yufei Chen; Changbao Jiang; Juliana Y. Leung; Andrew K. Wojtanowicz; Dongming Zhang
A sound understanding of the pore-fracture system across all scales provides an in-depth look at the intricate gas transport mechanisms in shale reservoirs. We performed a comprehensive multiscale characterization analysis on the Longmaxi shale samples using five complementary techniques: low-temperature gas (N2) adsorption (LTGA), mercury intrusion porosimetry (MIP), nuclear magnetic resonance (NMR)
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Comprehensive Review on the Research and Field Application of Preformed Particle Gel Conformance Control Technology J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-22 Mina Seidy Esfahlan; Elnaz Khodapanah; Seyyed AirezaTabatabaei-Nezhad
High water production is a common problem in mature oil reservoirs. Gel-based treatments have been widely used as blocking agents to control water production in heterogeneous reservoirs. A comprehensive review of preformed particle gels (PPGs) status, properties, treatment methods, and mathematical modeling are being discussed in the present study. Different types of PPGs are categorized, and the main
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Sand production by hydraulic erosion during multicycle steam stimulation: An analytical study J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-22 Mingzhe Guo; Huiqing Liu; Yanwei Wang; Hongling Zhang; Jing Wang; Xiaohu Dong
The production of sand particles associated with the reservoir hydrocarbons becomes one of the most common problems a well of multi cycle steam stimulation may experience during reservoir lifetime. Therefore, it is essential to the investigation of sand particles migration and sand production mechanisms coupled with fluid flow for optimization design of injection and profile control parameters. This
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Petrological characteristics, geochemical characteristics, and dolomite model of the Lower Cambrian Longwangmiao Formation in the periphery of the Sichuan Basin, China J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-22 Yong Wang; Zejin Shi; Hairuo Qing; Yaming Tian; Xiaoxing Gong
In this paper, the genesis of dolomite in Longwangmiao Formation is analyzed through field investigation and geochemical methods, and dolomization model is established, which is very important for the next reservoir prediction in Longwangmiao Formation. According to the crystal size, the Longwangmiao Formation dolomite can be divided into two types: microcrystalline dolomite (MID) and macrocrystalline
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Accurate Determination of Natural Gas Compressibility Factor by Measuring Temperature, Pressure and Joule-Thomson Coefficient: Artificial Neural Network Approach J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-21 Mahmood Farzaneh-Gord; Hamid Reza Rahbari; Behnam Mohseni-Gharesafa; Alexander Toikka; Irina Zvereva
Natural Gas (NG) compressibility factor as important property at any NG industrial applications determined by utilizing an intelligent approach precisely. Three thermodynamic properties include pressure, temperature and Joule-Thomson (JT) coefficient are selected as input parameters. These properties are chosen due to the measurement capabilities of available sensors. Unlike the traditional approaches
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Drilling performance analysis of a new type of direct-rotating mixed-jet nozzle J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-05 Biwei Fu; Si Zhang; Shaohu Liu; ZhaoLiang Zhu
Hydraulic radial drilling is an effective technique to increase the production of low-yield oil and gas wells. To improve the operation effect of this technology, a new type of direct-rotating mixed-jet nozzle is proposed, and the drilling performance of the nozzle is studied by combining theoretical, experimental, and numerical simulations. Firstly, the theoretical and numerical simulation models
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Characteristics and deposition models of the paleocene source rocks in the Lishui Sag, east China sea shelf basin: Evidences from organic and inorganic geochemistry J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-05 Chuang Lei; Shiyan Yin; Jiaren Ye; Jingfu Wu; Zhaosheng Wang; Bin Gao
The Lishui Sag, situated at the East China Sea Shelf Basin, is regarded as one of the most prospecting oil exploration zones. Low exploration in this region requires detailed identification of source rocks to enhance further oil and gas exploration. Three potential source rocks, including the Paleocene Yueguifeng (E1y), Lingfeng (E1l) and Mingyuefeng (E1m) Formations, were investigated by integrating
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Characteristics of lacustrine deepwater fine-grained lithofacies and source-reservoir combination of tight oil in the Triassic Chang 7 Member in Ordos Basin, China J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Feng Wang; Rong Chen; Wei Yu; Jingchun Tian; Xiaowei Liang; Xianfeng Tan; Li Gong
The lithofacies characteristics of fine sedimentary rocks affect the hydrocarbon generation capacity and reservoir performance of tight oil and are closely related to the sedimentary environment. On the basis of field outcrops and core observations, combined with logging data, thin section identification, grain size analysis, organic carbon analysis and physical property tests, the fine sedimentary
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Synthesis and identification of ZnTiO3 nanoparticles as a rheology modifier additive in water-based drilling mud J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Maryam Edalatfar; Farshad Yazdani; Mahsa Baghban Salehi
Performing drilling operations to explore and exploit oil and gas reservoirs by injection wells is one of the most essential pillars of the oil industry. Hence, the improvement of drilling mud properties has a particular role. In this research, a laboratory study was carried out on the effect of nano additive on rheological properties of drilling mud. The ZnTiO3 nanoparticles were synthesized and analyzed
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The Characteristics and Origins of Thief Zones in the Cretaceous Limestone Reservoirs of Central and Southern Mesopotamian Basin J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Hangyu Liu; Kaibo Shi; Bo Liu; Xinmin Song; Liben Deng; Rui Guo; Zhongyuan Tian; Yong Li; Ya Deng; Genjiu Wang
Thief zone is a common reservoir unit with super permeability developed in giant carbonate reservoirs and readily leads to the breakthrough of fluids bring the challenge to water flooding development or tertiary oil recovery. To provide insight into the characteristics and origins of thief zones in Cretaceous carbonate reservoirs in Central and Southern Mesopotamian Basin, core analyses, well log,
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Determination of Bubble Point Pressure & Oil Formation Volume Factor of Crude Oils Applying Multiple Hidden Layers Extreme Learning Machine Algorithms J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Sina Rashidi; Mohammad Mehrad; Hamzeh Ghorbani; David A. Wood; Nima Mohamadian; Jamshid Moghadasi; Shadfar Davoodi
An important requirement of reservoir management is to understand the properties of reservoir fluids and dependent phase behaviors. This makes it possible to determine the properties of reservoir fluids in laboratory pressure-volume-temperature (PVT) tests. Such laboratory tests are costly and time consuming, and reservoir data are sometimes not available. When estimating the in-place fluid volumes
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Field-scale fully coupled simulation of fluid flow and geomechanics: Gas storage/recovery process in a depleted sandstone reservoir J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Behnam Nasrollahzadeh; Hossein Ali Akhlaghi Amiri; Siavash Ghabezloo
This work addresses a field-scale model, in which the equations of multiphase/multicomponent fluid flow and geomechanics were fully coupled, to simulate natural gas successive storage/recovery processes in an Iranian sandstone depleted gas reservoir. First, a 1D mechanical earth model was developed for the reservoir wells and then converted to a geomechanical 3D model of the reservoir, through sequential
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Experimental Study of Spontaneous Imbibition for Oil Recovery in Tight Sandstone Cores under High Pressure High Temperature with Low Field Nuclear Magnetic Resonance J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Xiao GuoAmir Semnani; Destina Godwin Ekekeh; Zhengdong Gao; Mehdi Ostadhassan; Haowei Jia; Jian Fu; Wang Ying
Spontaneous imbibition (SI) plays a key role in production mechanism of unconventional reservoirs. Trivially, with the goal of getting higher efficiency there always has been an incessantly research activities to develop the technology progressively. In this regard, thermodynamic variables (i.e. pressure and temperature) can directly influence the process performance of SI. Thus, numerous papers have
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Fluid charging and hydrocarbon accumulation in the sweet spot, Ordos Basin, China J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Wen Zhao; Chengzao Jia; Lin Jiang; Tao Zhang; Minxia He; Fan Zhang; Zhenxue Jiang; Xiangfang Li; Keliu Wu
Although significant progress has been made in the tight gas exploration and development, there is still a limited understanding of the fluid charging and hydrocarbon accumulation in the sweet spot. In this study, a novel method is proposed to generate the stochastically constructed porous media which represents the transition region between tight surrounding sandstone and sweet spot. Based on the
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Streamline-based simulation in highly heterogeneous and anisotropic petroleum reservoirs using a non-orthodox MPFA method and an adaptive timestep strategy with unstructured meshes J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Jonathan Cunha Teixeira; Leonardo José do Nascimento Guimarães; Darlan Karlo Elisiário Carvalho
In this paper, an adaptive timestep size selection algorithm applied in streamline-based simulation for highly heterogeneous and anisotropic reservoirs is presented. To handle an arbitrarily, anisotropic, and discontinuous permeability tensor, we use a non-orthodox Multipoint Flux Approximation Method with a Diamond stencil (MPFA-D) discretize the pressure equation. For the solution of the transport
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Application of Supercritical Carbon Dioxide Jet: A Parametric Study using Numerical Simulation Model J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Yong Liu; Xinhui Guo; Jianping Wei; Huidong Zhang
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Iterative feedforward control of toolface orientation with simulation and laboratory case studies J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Xueying Wang; Hongjian Ni; Roman Shor; Ruihe Wang; Zhongmin Tang; Yuedong Sun
During slide drilling with a bent motor assembly, accurate toolface setting and control are critical challenges, and the performance depends a lot on the directional drillers’ experience. An efficient and reliable controller is therefore needed to eliminate the variability in performance between drillers. However, low sampling frequency and large time delays make common feedback controllers often inoperative
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Occurrence, mineralogy and geochemistry of fracture fillings in tight sandstone and their constraints on multiple-stage diagenetic fluids and reservoir quality: An example from the Kuqa foreland thrust belt, Tarim Basin, China J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Chun Liu; Hui Rong; Shijia Chen; Junmin Jia; Yangang Tang; Yi Deng
Sandstone reservoirs with a depth of over 6000m of the Lower Cretaceous Bashijiqike Formation in the Kuqa foreland thrust belt, Tarim Basin in NW China provide a good example for studying multiple-stage diagenetic fluid activities and effects of fractures on reservoir quality in tight sandstone. Three types of fractures can be identified in the sandstone: fully sealed fractures, partly filled fractures
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Effects of secondary emulsification of ASP flooding produced fluid during surface processes on its oil/water separation performances J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Di Wu; FujunXia; Sen Lin; Xun Cai; Huiping Zhang; Wenjie Liu; Yinghui Li; Rui Zhang; Yuwei Zhang; Xin Zhang; Jianjun Yu; Nannan Guo
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Study on Model-based Pump Noise Suppression Method of Mud Pulse Signal J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Guo Chen; Zhidan Yan; Tingzheng Gao; Hehui Sun; GuoLin Li; Junfei Wang
Mud pulse telemetry system plays a critical role in modern oil drilling engineering. However, the valid signal is complicated to be obtained because of the main disturbing of pump noises, especially in ultra-deep drilling operations. Therefore, four model-based noise suppression plans for the mud pulse signal pump are mainly proposed in this paper. First, three kinds of pump noise state-space models
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Evaluation of Rock Integrity during Well Drilling Activities using Reliability Analysis J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Beethoven G. Costa; dos S. Jaculli; Marcelo A. Mendes; Ricardo P. José
The main risk during the construction of oil wells is the possibility of uncontrolled hydrocarbon flow occurring from the well to the environment, commonly known as a blowout. After the Macondo accident, in the Gulf of Mexico, in 2010, there has been, in recent years, a significant increase in researches related to both well integrity and operational safety. A possible approach is to seek tools that
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Geochemical characteristics, origin of the Chang 8 oil and natural gas in the southwestern Ordos Basin, China J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-20 Kaiming Su; Shijia Chen; Yuting Hou; Haifeng Zhang; Xiaolei Zhang; Wenxuan Zhang; Guanglin Liu; Cong Hu; Meimei Han
Petroleum exploration in the Ordos Basin gradually expanded to the edge of the basin, but encountered difficulties on the southwestern edge. Compared with mature exploration areas inside the basin, the nature of reservoir fluids in the southwestern area is more complex. In order to better understand the oil / gas system in this area, this study conducted a detailed research on the geochemical characteristics
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Optimizing selection method of continuous particle size distribution for lost circulation by dynamic fracture width evaluation device J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-07 Jia Li; Zhengsong Qiu; Hanyi Zhong; Xin Zhao; Yifan Yang; Weian Huang
The increase in the pressure bearing capacity is critical for mitigation of lost circulation, and to do so the strength of the plugging zone should be increased via picking an effective evaluation method and choosing the proper particle size distribution (PSD). Therefore, in order to successfully investigate this process, the traditional evaluation device of lost circulation should be improved for
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A model for faults to link the Neogene reservoirs to the Paleogene organic-rich sediments in low-relief regions of the south Bohai Sea, China J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-08 Changzhi Li; Guosheng Xu; Fanghao Xu; Qing Yu; Haoran Liang
Fault acts as an important vertical migration conduit for hydrocarbons in rift basins and can transport hydrocarbons from deep-buried organic-rich sediments to shallow-buried coarse-grained sequences. Such migration process is expected, but generally needs to pass through thick mudstone intervals and its controlling factors are not well understood. The low-relief regions of the south Bohai Sea in the
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An innovative method for the quantification of small amounts of crude oil in water using a multi-wavelength separation analyzer J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-09 Pedro M. Rendel; Samira Mohammadkhani; Annette E. Jensen; Karen L. Feilberg
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A new spatial modeling method for 3D formation drillability field using fuzzy c-means clustering and random forest J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-11 Chao Gan; Wei-Hua Cao; Kang-Zhi Liu; Min Wu
A spatial model of the 3D formation drillability field is crucial for drilling optimization in the petroleum area. In this paper, a new spatial modeling method is proposed for the 3D formation drillability field, which has two stages. In the first stage, the number of formation modes is determined according to the formation characteristics and these modes are identified by the fuzzy c-means clustering
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Major corrosion influence factors analysis in the production well of CO2 flooding and the optimization of relative anti-corrosion measures J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-09 Baojun Dong; Dezhi Zeng; Zhiming Yu; LeLe Cai; Huiyong Yu; ShanZhi Shi; Gang Tian; Yonggang Yi
Major corrosion influence factors in the production well of CO2 flooding in Xinjiang oilfield were investigated, and corresponding anticorrosion measures (relating to corrosion inhibitors and corrosion-resistant alloys) had been contrasted in order to select a most suitable scheme to solve the tubing corrosion issue. The results showed that the corrosion of N80 steel in liquid phase was mainly affected
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Correlation-based Data Analytics of Wireline Logs for Decoding and Modeling Shale Gas Resources J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-19 Shengli Li; Y.Zee. Ma; Ernest Gomez
Correlation is widely used and its importance has become even more pronounced in big data. Generally, scientists and engineers look for highly correlated variables and ignore weakly correlated variables. We use a more holistic view of correlations in evaluating unconventional resources by integrating correlation with causal inference. In formation evalutions, many variables are involved and they generally
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Coal permeability related to matrix-fracture interaction at different temperatures and stresses J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-19 Zheng Gao; Bobo Li; Jianhua Li; Bin Wang; Chonghong Ren; Jiang Xu; Shuai Chen
Heat injection is considered to be an effective technique to increase Coalbed methane (CBM) production, which indicates the important role of temperature in gas flow. In this paper, two different experimental schemes have been designed, and the seepage tests concerning variable effective stress and variable pore pressure have been carried out respectively under different temperature conditions. A permeability
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Application of the artificial intelligence GANNATS model in forecasting crude oil demand for Saudi Arabia and China J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-09 Saud M. Al-Fattah
This paper develops a rigorous and advanced data-driven model to describe, analyze, and forecast the global crude oil demand. The study deploys a hybrid approach of artificial intelligence techniques, namely, the genetic-algorithm, neural-network, and data-mining approach for time-series models (GANNATS). The GANNATS was developed and applied to two country cases, including one for a high oil producer
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Quantitative analysis of the sequential initiation and simultaneous propagation of multiple fractures in shale gas/oil formations J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-09 Chunkai Fu; Boyun Guo; Ali Mokhtari
The excessive reach of new fractures during hydraulic fracturing can interact with the pre-existing fracture system during reservoir stimulation. This phenomenon is known as Frac Driven Interaction (FDI), which can greatly compromise the production performance of the wells. The key to minimizing the impact of FDI is to effectively control the length of fractures through a proper fracturing design.
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Identifying clay mineral using angular competitive neural network: A machine learning application for porosity estimative J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2020-12-30 Thales Luiz Pinheiro de Almeida; Bruno Andrey Fonseca Passos; Jéssica Lia Santos da Costa; André José Neves Andrade
In the daily practice of Formation Evaluation for porosity calculation considering the shale volume is common the adoption of simple hypotheses about the physical properties of the reservoir rock constituents. In this paper, it is argued that an accurate estimate of clay mineral physical properties in the reservoir rock are essential for a realistic porosity calculation, once it may be different from
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Water Saturation Calculation Using Fractional Flow and Production Logging Data in A Caspian Region Sandstone Petroleum Reservoir J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-09 A .Gurkan Iscan
Water saturation in porous media plays a significant role in static, dynamic reservoir modeling and petroleum reserves calculations. In this paper, a Pliocene conglomerate type of sandstone Caspian reservoir was studied. The objective of this paper is to apply water saturation calculation method using fractional flow and PLT (Production Logging Tool) and to compare the results with other methods. In
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Acidic and oxidation reactions of marcellus shale with Na2S2O8 J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-12 Xinyue Liang; James J. Sheng; Kerui Liu
To evaluate the effectiveness of the acidic and oxidation reactions of stimulating organic-rich shale during fracturing, we conducted imbibition experiments using the oxidant (Na2S2O8), under no confining pressure conditions. The chemical-induced fracturing process of Na2S2O8 with Marcellus shale samples was tested and evaluated by these methods: the mass changes before and after imbibition tests were
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A new transient model to simulate and optimize liquid unloading with coiled tubing conveyed gas lift J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-12 Guoqing Han; Gaoqiang Ma; Yue Gao; He Zhang; Kegang Ling
Nowadays, unloading gas wells with coiled tubing is a common application to the field. However, it still lacks of adequate understanding of dynamic behavior of the unloading process. This paper investigates the process of liquid unloading by gas lift with coiled tubing under transient conditions. This unloading process can be divided into three stages: liquid rising in tubing, liquid slug production
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A Numerical Study on Compositional Modeling of Two-Phase Fluid Flow and Heat Transfer in Vertical Wells J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-18 Sara Eghbali; Jonathan Banks; David S. Nobes
Geothermal energy is a sustainable and renewable source that can be extracted by circulating a single- or two-phase fluid through a geothermal well system. Two-phase flow and heat transfer models are required for predicting pressure and temperature profiles in oil, gas, and geothermal wells. We model fluid flow, thermodynamics and heat transfer in an idealised vertical well for single-(i.e., water)
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Acid-etching fracture morphology and conductivity for alternate stages of self-generating acid and gelled acid during acid-fracturing J. Pet. Sci. Eng. (IF 3.706) Pub Date : 2021-01-08 Bo Gou; Chencheng Guan; Xiao Li; Jichuan Ren; Ji Zeng; Lin Wu; Jianchun Guo
Initial fracture morphology and variation of acid-rock reaction temperature caused by alternate stages were ignored in the traditional alternate multistage acid-fracturing experiments, so a new design method of experiment simulation was proposed with these considerations in this paper. Alternate multistage acid-fracturing experiments were carried out based on this new method through using self-generating