
显示样式: 排序: IF: - GO 导出
-
Influence of cyclic thermal processes on gas migration in saturated GMZ01 bentonite J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-20 Lin-Yong Cui; Wei-Min Ye; Qiong Wang; Yong-Gui Chen; Bao Chen; Yu-Jun Cui
To ensure the performance efficiency and long-term operational safety of the engineering barrier in deep geological repositories, it is of great importance to investigate gas migration behavior in the water-saturated bentonite subjected to decay heat generated by the nuclear waste. In this work, experimental investigations were conducted to find out influences of multi-step thermal cycles on variations
-
Fracturing flowback fluids from shale gas wells in western chongqing: Geochemical analyses and relevance for exploration & development J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-19 Yonghong Fu; Yuqiang Jiang; Qinhong Hu; Tongtong Luo; Yaogan Li; Lei Zhian; Zhanlei Wang; Xingping Yin
Understanding the behavior and composition of fracturing flowback water (FFW) can provide insight into in situ water–rock interactions, assessment of the success of the fracturing operations. FFW was collected from three wells (Z202-H1, Z203, and Z205) for up to 108 days after fracturing in the same area of western Chongqing, China. The samples were analyzed for the concentrations of various ions (Na+
-
Prediction of hydrate formation temperature using gene expression programming J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-23 Menad Nait Amar
The accurate determination of hydrate formation temperature (HFT) is an extremely vital step in the context of designing processes containing hydrates. Due to the prohibitive time and the expensive cost of the experimental procedures, some empirical and theoretical approaches have been developed for estimating HFT. However, most of these prior approaches are associated with a lack of generalization
-
Quantitative Visualization and Characteristics of Gas Flow in 3D Pore-Fracture System of Tight Rock Based on Lattice Boltzmann Simulation J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-23 Peng Hou; Xin Liang; Feng Gao; Jiabin Dong; Jian He; Yi Xue
The geometric complexity of the 3D pore-fracture system of tight rock at the pore-scale is a primary challenge for the prediction of gas flow. In this paper, the 3D pore-fracture systems of tight rock are reconstructed based on the representation unit volume (REV) of the intact tight sandstone and fractal fracture. A 3D regularized lattice Boltzmann model that considered the gas slippage effect is
-
Gas flow characteristics in shale fractures after supercritical CO2 soaking J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-11 Yiyu Lu; Jiankun Zhou; Honglian Li; Jiren Tang; Lei Zhou; Xiang Ao
Using supercritical CO2 as fracturing medium to develop shale gas not only improve the stimulation effect of reservoir, but also reduce CO2 emissions. To optimise the flow of shale gas into a wellbore, it is important to understand the flow characteristics of gas in the shale fracture system after reservoir reconstruction. To date, no research has been conducted on the effect of supercritical CO2 on
-
Quantitative analysis of pore structure and permeability characteristics of sandstone using SEM and CT images J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-18 Hongyang Ni; Jiangfeng Liu; Bingxiang Huang; Hai Pu; Qingbin Meng; Yangguang Wang; Ziheng Sha
Permeability determines the exploration and development efficiency of the oil and gas field, while the pore structure directly affects the permeability of sandstones. Therefore, in the current study, the pore structure and permeability of sandstones were quantitatively analyzed from macro and micro perspectives. With SEM images at different magnifications, pore size distributions (PSD) were obtained
-
Effective thermal conductivity changes of the hydrate-bearing quartz sands in depressurization and soaking J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-22 Juan He; Xiaosen Li; Zhaoyang Chen; Qingping Li; Zhiming Xia; Yu Zhang; Yi Wang; Changyu You
The effective thermal conductivity changes in the sediments during depressurization are significant for hydrate exploitation. But these changes cannot be measured directly because of the unavailable stable conditions during depressurization. In this work, in order to form the stable conditions for the measurements, soaking was designed to stabilize temperature and pressure in the sample after depressurization
-
Borehole stability in shale formations: Effects of Thermal˗Mechanical˗Chemical parameters on well design J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-10 Masoud Aslannezhad; Azim Kalantariasl; Alireza Keshavarz
Borehole instability in the petroleum industry is mainly because of mechanical, chemical, and thermal factors which result in substantial yearly expenditures. The essential part of analysing borehole stability is choosing an optimum rock strength criterion. Many rock strength criteria have been used for rock failure analysis, however all mechanical, chemical and thermal effects are seldom coupled with
-
Stress-sensitivity mechanisms and its controlling factors of saline-lacustrine fractured tight carbonate reservoir J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-17 Qigui Tan; Yili Kang; Lijun You; Chengyuan Xu; Xiwen Zhang; Zhichao Xie
Although the stress sensitivity of carbonate reservoir has been investigated extensively, that of saline-lacustrine fractured tight carbonate reservoir still remains to be fully understood. In this work, permeability stress sensitivity behavior of saline-lacustrine fractured tight carbonate reservoir was investigated based on steady state test and pressure attenuation method. Several core analysis
-
Experimental study of the influence of water-based fracturing fluids on the pore structure of coal J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-18 Sheng Xue; Qiming Huang; Gang Wang; Wu Bing; Jun Li
To investigate the interaction between coal and fracturing fluid and its influence on the pore structures of the coal, three commonly used water-based fracturing fluids were selected and used to treat Illinois coal. A series of low-temperature nitrogen ad-/desorption experiments and nuclear magnetic resonance measurements were conducted to comparatively analyse the evolution of the coal pore structure
-
Ion-exchanged ETS-10 adsorbents for CO2/CH4 separation: IAST assisted comparison of performance with other zeolites J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-16 Mahsa Vosoughi; Hafez Maghsoudi; Saman Gharedaghi
-
The breakdown process of low-permeable shale and high-permeable sandstone rocks due to non-aqueous fracturing: the role of fluid infiltration J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-20 Yunzhong Jia; Chenpeng Song; Jiehao Wang; Quan Gan
Hydraulic fracturing operations have been widely used to enhance reservoir permeability during the extraction of oil, shale gas and tight sandstone gas. Recently, non-aqueous fracturing fluids, such as supercritical carbon dioxide and nitrogen, have been proposed as the potential fracturing fluid candidates due to their advantages of decreasing formation damage, conserving water resources and avoiding
-
Pore-scale investigation of hydrate morphology evolution and seepage characteristics in hydrate bearing microfluidic chip J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-20 Junchen Lv; Kunpeng Xue; Zhaoda Zhang; Zucheng Cheng; Yu Liu; Hailin Mu
The efficiency and safety of natural gas hydrate exploitation is significantly affected by the occurrence and distribution of hydrate and the seepage behaviors of gas and water in hydrate bearing sediments. We present the results from xenon hydrate formation and dissociation experiments with different salinities using quartz etching microfluidic chips. Direct visualization of hydrate growth morphology
-
Efficiency evaluation of closed and open cycle pure refrigerant cascade natural gas liquefaction process through exergy analysis J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-20 Carlos Arnaiz del Pozo; Ángel Jiménez Álvaro; Javier Rodríguez Martín; Ignacio López Paniagua
-
Oxidative dissolution kinetics of organic-rich shale by hydrogen peroxide (H2O2) and its positive effects on improving fracture conductivity J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-20 Qiuyang Cheng; Lijun You; Yili Kang; Yang Zhou; Nan Zhang
Maintaining the fracture network created by hydraulic fracturing remains challenging because unpropped fractures close during production, resulting in shale gas production decline. Chemical dissolution is being implemented to maintain unpropped fracture conductivity, and the effect of oxidative dissolution on organic-rich shale may have the potential to maintain these fractures. In this paper, the
-
Occurrence of fluids in high dip angled coal measures: Geological and geochemical assessments for southern Junggar Basin, China J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-29 Shuling Tang; Shimin Liu; Dazhen Tang; Shu Tao; Aobo Zhang; Yifan Pu; Taiyuan Zhang
The Junggar Basin, Xinjiang has abundant coalbed methane (CBM) resources, and most of the CBM is found in the coal reservoirs with high dip angle (>50°), where the generation, accumulation and extraction of CBM significantly differs with flat coal reservoirs. This study clarifies the effect of high dip angle on the fluid pressure field, in situ stress field, permeability and gas bearing capacity of
-
Measurement and modeling of coal adsorption-permeability based on the fractal method J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-04 Bin Wang; Bobo Li; Jianhua Li; Zheng Gao; Jiang Xu; Chonghong Ren; Yao Zhang
With the development of coal-bed methane (CBM) mining technology, deep coal-beds have become the target of CBM development. In order to simulate changes in coal adsorption and permeability characteristics caused by increased mining depth, low-temperature liquid nitrogen adsorption tests, isothermal adsorption tests and triaxial seepage tests under rising gas pressure have been conducted. In this study
-
Fouling propensity of nonstoichiometric pyrrhotite polytypes in glycol gas dehydration units J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-16 Kobra Pourabdollah
Fouling formation in gas dehydration units is performed mainly by gradual accumulation of sulfur-containing compounds and its corrosion products in glycol streams. High concentrations of iron-sulfur species in glycol media increase the fouling propensity on the tube surfaces of heat exchangers. Therefore, the factors affecting the fouling formation and their ranks were determined in a pilot plant gas
-
Second-order correction of Klinkenberg equation and its experimental verification on gas shale with respect to anisotropic stress J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-19 Yufei Chen; Changbao Jiang; Juliana Y. Leung; Andrew K. Wojtanowicz; Dongming Zhang; Chuanyao Zhong
Shale is an extremely tight and fine-grained sedimentary rock with nanometer-scale pore sizes. The internal nanopore structure gives rise to not merely the ultra-low permeability of shale, but also the significant slip flow (non-Darcy) phenomenon. This study involves a second-order correction of the traditional Klinkenberg equation and its experimental verification, in consideration of the effect of
-
Proppant transport in a planar fracture: Particle image velocimetry J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-19 Matías E. Fernández; Luis A. Pugnaloni; Martín Sánchez
Particle Image Velocimetry (PIV) is a well established technique used to measure displacements in fluids. Proppant transport and placement is a crucial phase in the process of well completion to stimulate production in gas and oil reservoirs. Proppant (a granular material) is injected along fluids during hydraulic stimulation to prop fractures open after hydrocarbon production is initiated. This work
-
Experimental study on surface morphology and relevant plugging behavior within acid-etched and unetched fractures J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-02 Wei Feng; Chen Yang; Fujian Zhou
Plugging and diverting acid fracturing is an indispensable and promising technology that aims to enhance productivity for complex carbonate reservoirs. The key to success for this technology is the formation of effective plugged zones within preexisting fractures. However, because fracture pattern before and after acid-etching is quite different, the plugging behavior of fibers and particulates within
-
Fine sand migration in hydrate-bearing sediments and median grain size ratio optimization of gravel pack J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-29 Shanshan Zhou; Lei Yang; Xin Lv; Kunpeng Xue; Jiafei Zhao; Yu Liu; Shengxiong Yang
Sand production greatly influences reservoir stability and safety during gas hydrate exploitation in hydrate-bearing sediments (HBS). Gravel packing is an effective method for sand control. Median grain size ratio (D50/d50) values and sand migration of gravel pack are important factors in sand control during gas hydrate exploitation. This paper focuses on sand migration in samples with an optimal (D50/d50)
-
Superficial Dielectric Constant(SDC) model of gas-water flow in Resonant Cavity Sensor(RCS) based on flow regimes J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-06 Yiguang Yang; Ying Xu; Chao Yuan; Haitao Wu; Jinghan Wang; Tao Li; Tao Zhang; Hui Xia
Water holdup measurement is always in the spotlight of the oil and gas industry. One way of determining water holdup in gas-liquid two-phase flow is through dielectric constant of flow. In this study, we proposed Superficial Dielectric Constant (SDC) and established the SDC model to describe the relationship between dielectric properties and water holdup. Firstly, we designed a Resonant Cavity Sensor(RCS)
-
Machine-learning predictions of the shale wells’ performance J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-12 Mohamed Mehana; Eric Guiltinan; Velimir Vesselinov; Richard Middleton; Jeffrey D. Hyman; Qinjun Kang; Hari Viswanathan
The ultra-low permeability nature of shale reservoirs leads to an extended linear flow and necessitates horizontal wells with multi-stage engineered fractures to efficiently extract hydrocarbons resources. These artificially-generated and naturally-occurring fractures form complex networks that create complex flow regimes which control oil production. These fractures are neither identical nor equally-spaced
-
A novel approach of evaluating favorable areas for shale gas exploration based on regional geological survey and remote sensing data J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-20 Xiaofeng Xu; Wanzhong Shi; Gangyi Zhai; Xianghua Xia; Xiaoming Zhang; Shaobin Liu; Xianglin Chen; Cong Zhang; Fanyang Meng
The periphery of the Huangling Massif is one of the principal prospecting regions of the Lower Cambrian shale gas resources in South China. The geological setting and ground surface conditions are complicated within this area, and the petroleum geological data is limited due to the low degree of exploration. A novel approach based on the regional geological survey and remote sensing data was proposed
-
Numerical simulation of the motion of polypropylene-particles in a horizontal straight pipe J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-06 Jinchao Fan; Shimin Zhang; Benchun Yao; Yi Hao; Xiaoxiao Zhu; Xianwen Liu
-
Assessment of local phase to mechanical response link: application to the chemo-mechanical identification of rock phases subjected to reactive environments J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-16 Ravi Prakash; Pierre Christian Kana Nguene; Denise Benoit; Kristina Henkel; Sara Abedi
An original approach to the problem of chemo-mechanical characterization of shale rocks is presented, which consists of combining grid nanoindentation technique, scanning electron microscopy-energy dispersive X-ray spectrometry (SEM-EDS), and multispectral image analysis. X-ray microanalysis of the major elements is performed over the indented region, resulting in high-resolution images of the spatial
-
Fluid response characteristics of multilayer superimposed CBM production under the different number of gas-producing layers condition J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-16 Li Jia; Shoujian Peng; Jiang Xu; Fazhi Yan; Chaolin Zhang; Qixian Li
Aiming at the “multilayer superimposed coalbed methane (MSCBM) system,” which is a widely developed CBM reservoir formation mode, a MSCBM production test device was developed. The initial reservoir pressure of the simulated reservoirs (coal seams Nos. I–IV) was 1.0, 1.4, 1.8, and 2.2 MPa, respectively. MSCBM production experiments were carried out using different numbers of gas-producing layers. The
-
Erosion simulation and improvement scheme of separator blowdown system ——A case study of Changning national shale gas demonstration area J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-05 Enbin Liu; Dangjian Li; Wensheng Li; Yupeng Liao; Weibiao Qiao; Wei Liu; Mohammadamin Azimi
In the shale gas vertical separation metering skid, after the shale gas is separated by the gas-liquid separator, the bottom sand-carrying sewage is driven by high pressure, and the high-speed flowing sand particles will cause serious erosion to the sewage valve. Given this problem, taking a production well in the Changning area as an example, the corresponding mathematical model, and a three-dimensional
-
Packed column modelling and experimental evaluation for CO2 absorption using MDEA solution at high pressure and high CO2 concentrations J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-26 Muhammad Zubair Shahid; Abdulhalim Shah Maulud; M Azmi Bustam; Humbul Suleman; Hairul Nazirah Abdul Halim; Azmi M. Shariff
N-Methyl-diethanolamine (MDEA) is a potential solvent to capture CO2 at high-pressure and high CO2 concentration conditions due to its high CO2-loading capacity and the pressure-driven nature of CO2-MDEA reaction equilibrium. However, no studies have been reported on packed column modelling and experimental evaluation of CO2 absorption process using MDEA solvent for high pressure and high CO2 concentration
-
Assessment method for gas supply reliability of natural gas pipeline networks considering failure and repair J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-28 Yueqiang Zhu; Peng Wang; Yi Wang; Ruikang Tong; Bo Yu; Zhiguo Qu
Pipeline networks are the primary means of natural gas transmission, and assessing the gas supply reliability is of great significance for the safe and stable operation of pipeline networks. However, current assessment researches for the gas supply reliability are just conducted on the entire pipeline networks and based on the failed pipeline networks, i.e. the assessment process is static. The individual
-
Effects of temperature on the corrosion behaviour of X70 steel in CO2-Containing formation water J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-20 Xu Chen; Chengyuan Li; Nanxi Ming; Chuan He
The corrosion behaviour of X70 pipeline steel in CO2-containing formation water at various temperatures was studied in a high-temperature and high-pressure reactor via weight loss measurements, scanning electron microscope, X-ray diffraction, energy dispersive spectroscopy, and electrochemical methods. The concentrations of CO2 and ions in formation water at 30–150 °C were calculated. The equilibrium
-
A novel approach to optimising well trajectory in heterogeneous reservoirs based on the fast-marching method J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-07 Zehao Lyu; Qinghua Lei; Liang Yang; Claire Heaney; Xianzhi Song; Pablo Salinas; Matthew Jackson; Gensheng Li; Christopher Pain
To achieve efficient recovery of subsurface energy resources, a suitable trajectory needs to be identified for the production well. In this study, a new approach is presented for automated identification of optimum well trajectories in heterogeneous oil/gas reservoirs. The optimisation procedures are as follows. First, a productivity potential map is generated based on the site characterisation data
-
Coupling effects of native H2S and different co-injected impurities on CO2 sequestration in layered saline aquifers J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-02 Didi Li; Xi Jiang; Yuhui Zhong; Aihua Liu
Impurity effects are an intricate issue in CO2 geological storage, involving both pre-dissolved impurities in the geological medium and co-injected impurities. Numerical simulations were carried out in this study to investigate the coupling effects of pre-dissolved H2S and different co-injected impurities (H2S, CH4 and N2) on CO2 sequestration in layered sour saline aquifers. The native H2S would be
-
Modeling In-situ tectonic stress state and maximum horizontal stress azimuth in the Central Algerian Sahara – A geomechanical study from El Agreb, El Gassi and Hassi Messaoud fields J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-01 Rafik Baouche; Souvik Sen; Rabah Chaouchi; Shib Sankar Ganguli
Central Algerian Sahara hosts many prolific hydrocarbon accumulations in the Paleozoic successions. In this work a contemporary stress field of the Saharan platform has been evaluated using the dataset from recently drilled wells in El Agreb, El Gassi and Hassi Messaoud fields. A pore fluid pressure gradient of 0.56 PSI/feet is interpreted from the in-situ measurements in the Paleozoic reservoir units
-
Critical factors controlling adsorption capacity of shale gas in Wufeng-Longmaxi formation, Sichuan Basin: Evidences from both experiments and molecular simulations J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-05 Guohui Chen; Chun Li; Shuangfang Lu; Tonglou Guo; Min Wang; Qingzhong Xue; Tianyu Zhang; Zhining Li; Yonghe Sun; Jinzhong Liu; Shu Jiang
The quantitative determination of the influence of the critical factors on the adsorption capacity of the shale is important for accurately evaluating its adsorption capacity under the geological conditions. The adsorption experiments are performed on both the dry and the water-saturated shale samples, and the Grand Canonical Monte Carlo (GCMC) simulations are carried out on both the organic and inorganic
-
Experimental and theoretical investigations on kinetic mechanisms of low-pressure CO2 adsorption onto Malaysian coals J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-29 Mustafa Abunowara; Suriati Sufian; Mohamad Azmi Bustam; Muhammad Babar; Usama Eldemerdash; Roberto Bencini; Sami Ullah; Mohammed Ali Assiri; Abdullah G. Al‐Sehemi; Ahmad Mukhtar
The adsorption mechanism of carbon dioxide (CO2) in the coal matrix is significant in practical stability and migration process of CO2 into a coalbed seam. This study presents the kinetic investigation and the main controlling step of CO2 adsorption capacity onto Malaysian coals. The experimental data of CO2 adsorption were determined using a volumetric technique at 273, 298, 308, and 318 K and pressures
-
The optimum pressure drawdown for production from a shale gas reservoir: A numerical study with a coupled geomechanics and reservoir model J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-01 Zhuang Sun; Hui-Hai Liu; Yanhui Han; Mustafa A. Basri; Rabah Mesdour
Pressure drawdown in a production well is a key parameter to control and optimize hydrocarbon production from the reservoirs. During production process in a stress-sensitive unconventional reservoir, there exist two competing mechanisms that are related to the pressure drawdown and impact the production: pressure gradient between the reservoir and production well and stress dependency of permeability
-
A comprehensive review of proppant transport in fractured reservoirs: Experimental, numerical, and field aspects J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-28 Abubakar Isah; Moaz Hiba; Khaled Al-Azani; Murtada Saleh Aljawad; Mohamed Mahmoud
The physics of proppant transport in fractured reservoirs is of great interest to the oil and gas industry; nevertheless, the outcomes are controversial. This study provides a comprehensive reference for proppant transport findings. The various types of fracturing fluids and their carrying capacity were discussed. The factors affecting proppant transport based on the Plexiglass visualization cell were
-
Model development for shear sonic velocity using geophysical log data: Sensitivity analysis and statistical assessment J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2020-12-29 Mohammad Islam Miah; Salim Ahmed; Sohrab Zendehboudi
Reservoir geomechanical parameters play a vital role in evaluating sanding potential, wellbore stability, and drilling performance for making decisions on development strategies of oil and gas fields. Compared to expensive experimental/laboratory investigations, the petrophysical log data-driven shear sonic velocity models are proven to be cost effective and quick to estimate geomechanical formation
-
Shear mechanism of fracture initiation from a horizontal well in layered shale J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-30 Shuai Heng; Ruitian Zhao; Xianzhong Li; Yingying Guo
Prediction of fracture initiation pressure (FIP) is an essential issue for safety drilling, fracturing evaluation and efficient production in shale gas exploitation. To quickly and accurately evaluate the FIP of a horizontal borehole drilled in anisotropic rocks, an analytical solution for borehole stress was first deduced based on the complex potential method and superposition principle. In combination
-
A novel decline curve regression procedure for analyzing shale gas production J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-28 Huiying Tang; Boning Zhang; Sha Liu; Hangyu Li; Da Huo; Yu-Shu Wu
Accurate prediction of gas production is critical for the shale gas development. Compared with the complicated physics-based simulation, the decline curve analysis (DCA) models based on parameter linearization or direct curve regression are much more straightforward and efficient. However, the linearization method might be time consuming in obtaining the parameters, and the direct regression might
-
Impact of zinc oxide nanoparticles on the rheological and fluid-loss properties, and the hydraulic performance of non-damaging drilling fluid J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-30 Srawanti Medhi; D.K. Gupta; Jitendra S. Sangwai
Exploration of shale gas has indeed changed the dynamics of the petroleum industry. Efficient drilling in shale bearing zones largely depends on the nature of drilling fluid that are used. Non-damaging drilling fluid (NDDF) has emerged as an important class of drilling fluids over the last decade due to its superior inhibitive nature that yields better wellbore conditioning, especially in formations
-
Blasingame decline analysis for multi-fractured horizontal well in tight gas reservoir with irregularly distributed and stress-sensitive fractures J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-25 Yongzheng Cui; Ruizhong Jiang; Yue Gao
Multi-fractured horizontal well (MFHW) is commonly used in tight gas reservoirs to achieve commercial development, and the created hydraulic fractures are irregularly distributed and stress-sensitive in general. The Blasingame decline analysis method that can deal with the variable rate/BHP cases has attracted great interest. In this paper, a Blasingame decline analysis model of MFHW with irregularly
-
Uniqueness of the equilibrium relationship among temperature, pressure and liquid water content in hydrate-bearing soils J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-23 Wenpeng Liang; Jiazuo Zhou; Changfu Wei
The dissociation curves of pore hydrate, conventionally depicted on the P-T plane, depend generally upon the adopted experimental conditions. In this paper, the experimental results are presented on the phase equilibrium conditions for the hydrate-bearing soils (HBS) at different initial water contents, amounts of the dissolvable salt and initial vessel pressures. It is shown that a unique relationship
-
Elastic wave velocities of hydrate-bearing sands containing methane gas bubbles: Insights from CT-acoustic observation and theoretical analysis J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-30 Jie Chen; Gaowei Hu; Qingtao Bu; Changling Liu; Lin Dong; Yizhao Wan; Peixiao Mao; Yang Guo; Zihao Wang
The elastic wave velocities of hydrate-bearing sediments (HBS) are considerably affected by the content of free gas and hydrate. Although several existing models relate the free gas and hydrate saturation to acoustic velocities, the accuracy of these models is still uncertain because of the difficulty in determining the gas content. In this study, we acquired the gas volume fraction and acoustic velocity
-
Effects of gas content and ambient temperature on combustion characteristics of methane hydrate spheres J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-30 Gan Cui; Zengrui Dong; Kai Xie; Shun Wang; Tao Guo; Jianguo Liu; Xiao Xing; Zili Li
Methane hydrate has the potential to become a high quality medium for gas storage and a special fuel because of its high efficiency for gas storage and its combustibility. It is important to study the factors that affect the combustion characteristics of methane hydrate. In this paper, the effects of gas content and ambient temperature on the combustion of methane hydrate spheres are investigated experimentally
-
Simulating gas hydrate formation in the southern hydrate ridge, Cascadia Margin J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-29 Sulav Dhakal; Ipsita Gupta
The Cascadia Margin in the Pacific Ocean is a widely investigated region for oceanic gas hydrates. In this study, numerical simulation models are developed to simulate the flow of methane gas up fault zones in the Southern Hydrate Ridge of the Cascadia Margin. Three different hydrate formation scenarios, common to hydrate formation mechanisms in similar settings, are simulated. The tested scenarios
-
Integrated sedimentological and petrophysical characterization for clastic reservoirs: A case study from New Zealand J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-08 Ahmed A. Radwan; Bassem S. Nabawy; Ahmed Abdelmaksoud; Aref Lashin
The present study aims at characterizing the sedimentological and petrophysical properties of the Middle-Late Miocene Mt Messenger reservoir in Taranaki Basin, New Zealand. It is a detailed study based on availability of sedimentological (petrography, SEM and XRD), well log data (gamma ray, neutron, density, sonic, shallow and deep resistivity, PEF and RFT logs), in addition to conventional and special
-
Characteristics of Micro-fracturing in shales induced by dilute acid J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-02-04 Mao Sheng; Waleed Ali Khan; Shizhong Cheng; Panpan Zhang; Shouceng Tian; Quan Xu
The utilization of acid has been approved as a potential approach to enhance Stimulated Reservoir Volume (SRV) by creating secondary pores and microfractures in shale reservoirs. This paper proposed an acid soaking technique to quantify the generation of microfracturing behaviors. Two types of core samples from distinct shale depositional environments, namely Longmaxi carbonate-rich, and Yanchang clay-rich
-
An outlook into recent advances on estimation of effective stimulated reservoir volume J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-21 Ibrahim Adamu Umar; Berihun Mamo Negash; Ato Kwamena Quainoo; Mohammed Abdalla Ayoub
Stimulated reservoir volume (SRV) seldom provides an actual producible reservoir volume in gas shale reservoirs. It is determined by analysing microseismic events induced by a network of hydraulic fracture and reopened natural fractures. However, the occurrence of noncontributory microseismic events leads to an overestimation while the presence of natural fractures leads to an underestimation of producible
-
Multiple methane hydrate formation in powder poly(vinyl alcohol) cryogel for natural gas storage and transportation J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-18 Lev S. Podenko; Andrey O. Drachuk; Nadezhda S. Molokitina; Anatoliy N. Nesterov
-
A proposed classification for the reservoir quality assessment of hydrocarbon-bearing sandstone and carbonate reservoirs: A correlative study based on different assessment petrophysical procedures J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-22 Bassam A. Abuamarah; Bassem S. Nabawy
Petrophysical reservoir quality assessment is achieved through several methods based on the pore volume, connectivity, and conductivity. Reservoir quality index (RQI), and reservoir flow indicator (FZI) are among the most important parameters that are used for this assessment. In addition, the effective pore radius of Winland (r35) is additional technique that is applied based on mercury injection
-
Development of a burst capacity model for corroded pipelines considering corrosion defect width and a revised Folias factor equation J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-21 Shulong Zhang; Wenxing Zhou
The present study proposes a new burst capacity model for corroded oil and gas pipelines based on extensive parametric three-dimensional (3D) elasto-plastic FEA validated by full-scale burst tests. The corrosion defect is assumed to be semi-ellipsoidal-shaped in the proposed model as it better approximates the geometry of real corrosion defects than the commonly used rectangular idealization. Based
-
Gas rate decline analysis for boundary-dominated flow with fractal reservoir properties under constant / variable bottom-hole pressure conditions J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-22 Yang Wang; Shiqing Cheng; Cao Wei; Kaidi Zhang; Haiyang Yu
Current gas rate decline analysis methods in boundary-dominated flow (BDF) are mainly based on Arps' empirical decline models, or the liquid-based analytical models associating with pseudo-variables. Recently, Stumpf and Ayala (2016), and Wang and Ayala (2020) demonstrated that the decline exponents (b) used in Arps’ hyperbolic model can be rigorously estimated in advance for both constant and variable
-
Synthesis of hollow Al-doped MgO spheres via a sacrificial templating method for enhanced CO2 adsorption J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-22 Xiaodi Niu; Yanyan Feng; Yonghui Xu; Wen Yang
-
Artificial neural network (ANN) approach to predict unconfined compressive strength (UCS) of oil and gas well cement reinforced with nanoparticles J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-22 Phillip D. McElroy; Heber Bibang; Hossein Emadi; Yildirim Kocoglu; Athar Hussain; Marshall C. Watson
The prediction of unconfined compressive strength (UCS) of oil well cement class “H” based on the artificial neural network (ANN) modeling approach is presented in this study. 195 cement samples were embedded with varying dosages of strength enhancing pre-dispersed nanoparticles consisting of nanosilica (nano-SiO2), nanoalumina (nano-Al2O3), and nanotitanium dioxide (nano-TiO2) at various simulated
-
Influence of pore structural properties on gas hydrate saturation and permeability: A coupled pore-scale modelling and X-ray computed tomography method J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-27 Jianmeng Sun; Huaimin Dong; Muhammad Arif; Linjun Yu; Yihuai Zhang; Naser Golsanami; Weichao Yan
Gas hydrate, as an alternate hydrocarbon source, has attracted significant attention in past decades. A precise estimation of permeability of the gas hydrate-bearing formation is essential for predicting the flow behaviors and the associated gas production performance. In this research, the influence of gas hydrate saturation on pore structural properties and then affect permeability was investigated
-
Time-dependent coal permeability: Impact of gas transport from coal cleats to matrices J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-18 Chunguang Wang; Jidong Zhang; Yuxiao Zang; Ruizhi Zhong; Jianguo Wang; Yu Wu; Yujing Jiang; Zhongwei Chen
Coal seams are usually fractured reservoirs where the factures/cleats are fluids flow channels, and the matrix blocks serve as the storage space. The gas transport within the matrix has crucial impacts on the variation of cleat aperture and thus affects the reliable determination of coal permeability. Most literature on laboratory measurements and the development of relevant analytical models focus
-
Induced stress evolution of hydraulic fracturing in an inclined soft coal seam gas reservoir near a fault J. Nat. Gas Sci. Eng. (IF 3.841) Pub Date : 2021-01-08 Qianting Hu; Zhizhong Jiang; Quangui Li; Wenbin Wu; Qingguo Wang; Xiaoguang Wang; Yongjin Ran; Shengli Tong