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Reservoir characteristics and formation model of Upper Carboniferous bauxite series in eastern Ordos Basin, NW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Yong LI, Zhuangsen WANG, Longyi SHAO, Jiaxun GONG, Peng WU
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Influences of different alkaline and acidic diagenetic environments on diagenetic evolution and reservoir quality of alkaline lake shales Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Changzhi LI, Pei GUO, Jinghong XU, Kai ZHONG, Huaguo WEN
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Characteristics and main controlling factors of intra-platform shoal thin-layer dolomite reservoirs: A case study of Middle Permian Qixia Formation in Gaoshiti–Moxi area of Sichuan Basin, SW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Jiang HE, Zhihua LIAN, Wenjun LUO, Hui ZHOU, Huilin XU, Puwei HE, Yi Yang, Xuemei LAN
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Hydrocarbon accumulation history in Lower Cretaceous in northern slope of Bongor Basin in Chad, Central Africa Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Li WANG, Zhiquan NIE, Yebo DU, Lin WANG, Fanchao MENG, Yuliu CHEN, Jie HU, Ruxin DING
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An intelligent automatic correlation method of oil-bearing strata based on pattern constraints: An example of accretionary stratigraphy of Shishen 100 block in Shinan Oilfield of Bohai Bay Basin, East China Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Degang WU, Shenghe WU, Lei LIU, Yide SUN
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Microscopic experiment on efficient construction of underground gas storages converted from water-invaded gas reservoirs Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Tongwen JIANG, Huan QI, Zhengmao WANG, Yiqiang LI, Jinfang WANG, Zheyu LIU, Jinxin CAO
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A transient production prediction method for tight condensate gas wells with multiphase flow Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Wenpeng BAI, Shiqing CHENG, Yang WANG, Dingning CAI, Xinyang GUO, Qiao GUO
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Hydrocarbon accumulation in deep ancient carbonate–evaporite assemblages Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Shuyuan SHI, Suyun HU, Wei LIU, Tongshan WANG, Gang ZHOU, Anna XU, Qingyu HUANG, Zhaohui XU, Bin HAO, Kun WANG, Hua JIANG, Kui MA, Zhuangzhuang BAI
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Anisotropic dynamic permeability model for porous media Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Xuehao PEI, Yuetian LIU, Ziyu LIN, Pingtian FAN, Liao MI, Liang XUE
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Identification and evaluation of shale oil micro-migration and its petroleum geological significance Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Tao HU, Fujie JIANG, Xiongqi PANG, Yuan LIU, Guanyun WU, Kuo ZHOU, Huiyi XIAO, Zhenxue JIANG, Maowen LI, Shu JIANG, Liliang HUANG, Dongxia CHEN, Qingyang MENG
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Petroleum geological characteristics and exploration targets of the oil-rich sags in the Central and West African Rift System Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Lirong DOU, Zhongsheng SHI, Wenzhu PANG, Feng MA
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Episodic hydrothermal alteration on Middle Permian carbonate reservoirs and its geological significance in southwestern Sichuan Basin, SW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Mingyou FENG, Junxin SHANG, Anjiang SHEN, Long WEN, Xingzhi WANG, Liang XU, Feng LIANG, Xiaohong LIU
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Miscibility of light oil and flue gas under thermal action Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Changfeng XI, Bojun WANG, Fang ZHAO, Daode HUA, Zongyao QI, Tong LIU, Zeqi ZHAO, Junshi TANG, You ZHOU, Hongzhuang WANG
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Experimental investigation of the effects of oil asphaltene content on CO2 foam stability in the presence of nanoparticles and sodium dodecyl sulfate Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Hossein SADEGHI, Ali Reza KHAZ’ALI, Mohsen MOHAMMADI
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A review of interaction mechanisms and microscopic simulation methods for CO2-water-rock system Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Liehui ZHANG, Tao ZHANG, Yulong ZHAO, Haoran HU, Shaomu WEN, Jianfa WU, Cheng CAO, Yongchao WANG, Yunting FAN
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Hydrocarbon accumulation characteristics in basement reservoirs and exploration targets of deep basement reservoirs in onshore China Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Zecheng WANG, Qingchun JIANG, Jufeng WANG, Guohui LONG, Honggang CHENG, Yizuo SHI, Qisen SUN, Hua JIANG, Yiming ABULIMITI, Zhenglin CAO, Yang XU, Jiamin LU, Linjun HUANG
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Characteristics and control factors of feldspar dissolution in gravity flow sandstone of Chang 7 Member, Triassic Yanchang Formation, Ordos Basin, NW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Haihua ZHU, Qiuxia ZHANG, Guodong DONG, Fei SHANG, Fuyuan ZHANG, Xiaoming ZHAO, Xi ZHANG
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Discovery and inspiration of large- and medium-sized glutenite-rich oil and gas fields in the eastern South China Sea: An example from Paleogene Enping Formation in Huizhou 26 subsag, Pearl River Mouth Basin Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Changgui XU, Yangdong GAO, Jun LIU, Guangrong PENG, Pei LIU, Wanlin XIONG, Penglin SONG
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Optimization method of refracturing timing for old shale gas wells Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Qiang WANG, Jinzhou ZHAO, Yongquan HU, Yongming LI, Yufeng WANG
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A technique for enhancing tight oil recovery by multi-field reconstruction and combined displacement and imbibition Pet. Explor. Dev. (IF 7.5) Pub Date : 2024-02-16 Zhengdong LEI, Zhengmao WANG, Lijun MU, Huanhuan PENG, Xin LI, Xiaohu BAI, Zhen TAO, Hongchang LI, Yingfeng PENG
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Structural characteristics of continental carbonate-rich shale and shale oil movability: A case study of the Paleogene Shahejie Formation shale in Jiyang Depression, Bohai Bay Basin, China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Huimin LIU, Youshu BAO, Shouchun ZHANG, Zheng LI, Junliang LI, Xuejun WANG, Lianbo WU, Yong WANG, Weiqing WANG, Rifang ZHU, Shun ZHANG, Xin WANG
Based on rock mineral and geochemical analysis, microscopic observation, physical property measurement, and thin laminae separation test, etc., the characteristics of typical laminae of the Paleogene Shahejie Formation carbonate-rich shale in the Jiyang Depression were analyzed, and the organic matter abundance, reservoir properties, and oil-bearing properties of different laminae were compared. Typical
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Identification, evolution and geological indications of solid bitumen in shales: A case study of the first member of Cretaceous Qingshankou Formation in Songliao Basin, NE China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Bo LIU, Liu WANG, Xiaofei FU, Qiuli HUO, Longhui BAI, Jiancai LYU, Boyang WANG
On the basis of sorting out current understanding of solid bitumen (SB) in shales and taking organic-rich shales in the first member of the Cretaceous Qingshankou Formation in the Songliao Basin as an example, the definition, classification, occurrence and evolution path of SB are systemtically studied, and the indicative significance of SB reflectance (Rob) on maturity and its influence on the development
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Wellbore stability model in shale formation under the synergistic effect of stress unloading-hydration Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Yi DING, Xiangjun LIU, Lixi LIANG, Jian XIONG, Wei LI, Xiaochen WEI, Xi DUAN, Lianlang HOU
According to the transversely isotropic theory and weak plane criterion, and considering the mechanical damages due to stress unloading and hydration during drilling, a shale wellbore stability model with the influence of stress unloading and hydration was established using triaxial test and shear test. Then, factors influencing the wellbore stability in shale were analyzed. The results indicate that
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In-situ hydrocarbon formation and accumulation mechanisms of micro- and nano-scale pore-fracture in Gulong shale, Songliao Basin, NE China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Xiaojun WANG, Baowen CUI, Zihui FENG, Hongmei SHAO, Qiuli HUO, Bin ZHANG, Bo GAO, Huasen ZENG
By conducting experimental analyses, including thermal pyrolysis, micro-/nano-CT, argon-ion polishing field emission scanning electron microscopy (FE-SEM), confocal laser scanning microscopy (CLSM), and two-dimensional nuclear magnetic resonance (2D NMR), the Gulong shale oil in the Songliao Basin was investigated with respect to formation model, pore structure and accumulation mechanism. First, in
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Control of strike-slip faults on Sinian carbonate reservoirs in Anyue gasfield, Sichuan Basin, SW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Xiao HE, Qingsong TANG, Guanghui WU, Fei LI, Weizhen TIAN, Wenjun LUO, Bingshan MA, Chen SU
The largest Precambrian gas field (Anyue Gasfield) in China has been discovered in the central Sichuan Basin. However, the deep ancient Ediacaran dolomite presents a substantial challenge due to their tightness and heterogeneity, rather than assumed large-area stratified reservoirs controlled by mound-shoal microfacies. This complicates the characterization of “sweet spot” reservoirs crucial for efficient
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Origin of gas condensate reservoir in Fuman Oilfield, Tarim Basin, NW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Qinghua WANG
To understand the reservoir property and hydrocarbon accumulation conditions of the Middle and Upper Ordovician intraplatform shoal between ultra-deep main strike-slip faults in Fuman Oilfield of the Tarim Basin, China, the main strike-slip faults in and around well FD1 in the basin were analyzed in terms of sedimentary facies, sequence stratigraphy, intraplatform shoal reservoir property, and oil
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Accumulation and exploration enlightenment of shallow normal-pressure shale gas in southeastern Sichuan Basin, SW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Lu YUN
Based on the drilling, logging, experimental and testing data of Well PD1, a shallow normal-pressure shale gas well in the Laochangping anticline in southeastern Sichuan Basin, the shallow shale gas reservoirs of the Ordovician Wufeng Formation to Silurian Longmaxi Formation (Wufeng–Longmaxi) were investigated in terms of geological characteristics, occurrence mechanism, and adsorption-desorption characteristics
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Research progress and key issues of ultra-deep oil and gas exploration in China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Dengfa HE, Chengzao JIA, Wenzhi ZHAO, Fengyin XU, Xiaorong LUO, Wenhui LIU, Yong TANG, Shanlin GAO, Xiujuan ZHENG, Di LI, Na ZHENG
Based on the recent oil and gas discoveries and geological understandings on the ultra-deep strata of sedimentary basins, the formation and occurrence of hydrocarbons in the ultra-deep strata were investigated with respect to the processes of basin formation, hydrocarbon generation, reservoir formation and hydrocarbon accumulation, and key issues in ultra-deep oil and gas exploration were discussed
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Petrophysical properties and their influencing factors of carbonates in the fourth member of Sinian Dengying Formation, Sichuan Basin, SW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Jiaqing WANG, Jixin DENG, Zhonghua LIU, Longlong YAN, Hui XIA
Based on the measurements of petrological, petrophysical and elastic properties of the samples of different sedimentary facies in the fourth member of Sinian Dengying Formation (Deng 4 Member) in the Sichuan Basin, the diagenetic processes of reservoirs of different sedimentary facies and their controls on the petrophysical properties were discussed. The results show that cracks and mineral composition
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Restoration of reservoir diagenesis and hydrocarbon accumulation process by calcite in-situ U-Pb dating and fluid inclusion analysis: A case study on Cretaceous Qingshuihe Formation in Gaoquan Structure, southern Junggar Basin, NW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Lili GUI, Qingong ZHUO, Xuesong LU, Wenxia YANG, Weiyan CHEN, Hai WU, Junjia FAN, Yinjun HE, Rizhou CAO, Xiaoqing YU
The complexity of diagenesis and hydrocarbon accumulation in the deep reservoirs in southern Junggar Basin restricts hydrocarbon exploration in the lower reservoir assemblage. The lithofacies and diagenesis of reservoirs in the Cretaceous Qingshuihe Formation in the Gaoquan structure of the Sikeshu Sag, southern Junggar Basin were analyzed. On this basis, the thermal history was calibrated using calcite
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Action mechanisms of abnormal fluid pressure on physical properties of deep reservoirs: A case study on Jurassic Toutunhe Formation in the southern margin of Junggar Basin, NW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Zhiyong GAO, Jinggang CUI, Xiaorong FAN, Jiarui FENG, Yuxin SHI, Zhong LUO
Considering the action mechanisms of overpressure on physical changes in skeletal grains of deep reservoir rocks and the differences in physical changes of skeletal grains under overpressure and hydrostatic pressure, the sandstone of the Jurassic Toutunhe Formation in the southern margin of Junggar Basin was taken as an example for physical modeling experiment to analyze the action mechanisms of overpressure
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Tight gas charging and accumulation mechanisms and mathematical model Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Nengwu ZHOU, Shuangfang LU, Pengfei ZHANG, Zizhi LIN, Dianshi XIAO, Jiamin LU, Yingkang ZHU, Yancheng LIU, Liming LIN, Min WANG, Xinyu JIANG, Yang LIU, Ziyi WANG, Wenbiao LI
The gas-water distribution and production heterogeneity of tight gas reservoirs have been summarized from experimental and geological observations, but the charging and accumulation mechanisms have not been examined quantitatively by mathematical model. The tight gas charging and accumulation mechanisms were revealed from a combination of physical simulation of nuclear magnetic resonance coupling displacement
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Development technologies for Triassic Chang 7 shale oil in Ordos Basin: A case study of Qingcheng Oilfield, NW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Yonghong HE, Ting XUE, Zhen LI, Xiaohu BAI, Jianming FAN, Xuze ZHANG
The reservoirs in the seventh member of the Triassic Yanchang Formation (Chang 7 Member) in the Qingcheng Oilfield of the Ordos Basin are characterized by thin sandbody, tight rocks, high heterogeneity, low formation pressure coefficient, and complex geomorphology. Through the efforts in the stages of exploration, appraisal, pilot testing and development, a series of key technologies have been formed
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Optimization of shut-in time based on saturation rebalancing in volume-fractured tight oil reservoirs Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Jianguo XU, Rongjun LIU, Hongxia LIU
Based on imbibition replacement of shut-in well in tight oil reservoirs, this paper expounds the principle of saturation rebalancing during the shut-in process after fracturing, establishes an optimization method for shut-in time after horizontal well volume fracturing with the goal of shortening oil breakthrough time and achieving rapid oil breakthrough, and analyzes the influences of permeability
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Machine learning inspired workflow to revise field development plan under uncertainty Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Ashish Kumar LOOMBA, Vinicius Eduardo BOTECHIA, Denis José SCHIOZER
We present an efficient and risk-informed closed-loop field development (CLFD) workflow for recurrently revising the field development plan (FDP) using the accrued information. To make the process practical, we integrated multiple concepts of machine learning, an intelligent selection process to discard the worst FDP options and a growing set of representative reservoir models. These concepts were
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Hybrid low salinity water and surfactant process for enhancing heavy oil recovery Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Teresa ROLDÁN-CARRILLO, Gladys CASTORENA-CORTES, Rodrigo Orlando SALAZAR CASTILLO, Luis HERNÁNDEZ-ESCOBEDO, Patricia OLGUÍN-LORA, Herón GACHUZ-MURO
Combining low salinity water (LSW) with surfactants has an enormous potential for enhancing oil recovery processes. However, there is no consensus about the mechanisms involved, in addition to the fact that several studies have been conducted in model systems, while experiments with rocks and reservoir fluids are scarce. This study presents a core-flooding experiment of LSW injection, with and without
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Intelligent identification and real-time warning method of diverse complex events in horizontal well fracturing Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Bin YUAN, Mingze ZHAO, Siwei MENG, Wei ZHANG, He ZHENG
The existing approaches for identifying events in horizontal well fracturing are difficult, time-consuming, inaccurate, and incapable of real-time warning. Through improvement of data analysis and deep learning algorithm, together with the analysis on data and information of horizontal well fracturing in shale gas reservoirs, this paper presents a method for intelligent identification and real-time
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High-temperature corrosion of phosphate completion fluid and corrosion inhibition method by membrane transformation Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Hu JIA, Wei HE, Chengcheng NIU
By analyzing the corrosion of phosphate completion fluid on the P110 steel at 170 °C, the high-temperature corrosion mechanism of phosphate completion fluid was revealed, and a corrosion inhibition method by membrane transformation was proposed and an efficient membrane-forming agent was selected. Scanning electron microscope (SEM) images, X-ray energy spectrum and X-ray diffraction results were used
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Effects of cosolvents on CO2 displacement of shale oil and carbon storage Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Yifan ZHANG, Lu WANG, Rui ZOU, Run ZOU, Zhan MENG, Liang HUANG, Yisheng LIU, Hao LEI
Molecular dynamics method was used to establish composite wall/inorganic nanopores of three pore sizes, three shale oil systems, five CO2-cosolvent systems, and pure CO2 system. The process of CO2-cosolvent displacement of crude oil in shale nanopores and carbon storage was simulated and the influencing factors of displacement and storage were analyzed. It is shown that the attraction of the quartz
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Enlightenment of calcite veins in deep Ordovician Wufeng–Silurian Longmaxi shales fractures to migration and enrichment of shale gas in southern Sichuan Basin, SW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-12-18 Yue CUI, Xizhe LI, Wei GUO, Wei LIN, Yong HU, Lingling HAN, Chao QIAN, Jianming ZHAO
The relationship between fracture calcite veins and shale gas enrichment in the deep Ordovician Wufeng Formation–Silurian Longmaxi Formation (Wufeng–Longmaxi) shales in southern Sichuan Basin was investigated through core and thin section observations, cathodoluminescence analysis, isotopic geochemistry analysis, fluid inclusion testing, and basin simulation. Tectonic fracture calcite veins mainly
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Petroleum geology of marl in Triassic Leikoupo Formation and discovery significance of Well Chongtan1 in central Sichuan Basin, SW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Zecheng WANG, Yongguang XIN, Wuren XIE, Long WEN, Hao ZHANG, Zengye XIE, Jianyong ZHANG, Han TIAN, Wenzheng LI, Xiaodong FU, Haofei SUN, Xiaofang WANG, Guoyi HU, Yu ZHANG
In 2022, the risk exploration well Chongtan1 (CT1) in the Sichuan Basin revealed commercial oil and gas flow during test in a new zone – the marl of the second submember of the third member of Leikoupo Formation (Lei-32) of Middle Triassic, recording a significant discovery. However, the hydrocarbon accumulation in marl remains unclear, which restricts the selection and deployment of exploration area
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Trend of global carbon dioxide capture, utilization and storage industry and challenges and countermeasures in China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Lirong DOU, Longde SUN, Weifeng LYU, Mingyuan WANG, Feng GAO, Ming GAO, Hang JIANG
This paper systematically reviews the trend of carbon dioxide capture, utilization and storage (CCUS) industry in the world and China, presents the CCUS projects, clusters, technologies and strategies/policies, and analyzes the CCUS challenges and countermeasures in China based on the comparison of CCUS industrial development at home and abroad. The global CCUS development has experienced three stages:
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Characteristics and discovery significance of the Upper Triassic–Lower Jurassic marine shale oil in Qiangtang Basin, China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Anjiang SHEN, Xiaodong FU, Jianyong ZHANG, Xuebin WEI, Anping HU, Jian WANG, Shaoyun XIONG, Xiugen FU, Yuan XIE, Siqi LIU, Xi LI, Xin WANG, Xunyun HE, Zhanfeng QIAO, Jianfeng ZHENG, Junmao DUAN
Mesozoic marine shale oil was found in the Qiangtang Basin by a large number of hydrocarbon geological surveys and shallow drilling sampling. Based on systematic observation and experimental analysis of outcrop and core samples, the deposition and development conditions and characteristics of marine shale are revealed, the geochemical and reservoir characteristics of marine shale are evaluated, and
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Quantitative evaluation model of shale oil adsorption: A case study of the first member of Cretaceous Qingshankou Formation in northern Songliao Basin, NE China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Jinbu LI, Min WANG, Shuangfang LU, Liang LIU, Ming LI, Yuchen ZHANG, Xin WANG, Xinbin ZHAO, Jinyou ZHANG, Ying ZHAO
A quantitative evaluation model that integrates kerogen adsorption and clay pore adsorption of shale oil was proposed, and the evaluation charts of adsorption-swelling capacity of kerogen (Mk) and adsorbed oil capacity of clay minerals (Mc) were established, taking the 1st member of Cretaceous Qingshankou Formation in the northern Songliao Basin as an example. The model and charts were derived from
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Experimental study on flow heterogeneity of shale bedding fractures based on full-diameter cores Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Juhui ZHU, Jing ZENG, Zhoumei GENG, Yongming LI, Tengfei WANG, Deqi LI, Yong PAN, Juan WANG
A self-designed full-diameter core experimental facility was used to evaluate the flow heterogeneity of bedding fractures at four radial directions under different closure pressures and injection rates, using full-diameter cores retaining original natural bedding fractures. The distribution morphology of bedding surface affects the conductivity of bedding fractures, and the flow capacity of bedding
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Fracture propagation, proppant transport and parameter optimization of multi-well pad fracturing treatment Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Peng YANG, Shicheng ZHANG, Yushi ZOU, Jianmin LI, Xinfang MA, Gang TIAN, Junchao WANG
This paper establishes a 3D multi-well pad fracturing numerical model coupled with fracture propagation and proppant migration based on the displacement discontinuity method and Eulerian-Eulerian frameworks, and the fracture propagation and proppant distribution during multi-well fracturing are investigated by taking the actual multi-well pad parameters as an example. Fracture initiation and propagation
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Dynamic modelling and engineering simulation of fluid mechanics in water injectors Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Deli JIA, Haoyang WEN, Fuchao SUN, Quanbin WANG, Qinghai YANG, Tao FU
To study the fluid dynamic response mechanism under the working condition of water injection well borehole, based on the microelement analysis of fluid mechanics and the classical theory of hydrodynamics, a fluid microelement pressure-flow rate relationship model is built to derive and solve the dynamic distribution of fluid pressure and flow rate in the space of well borehole. Combined with the production
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Fine-grained gravity flow sedimentation and its influence on development of shale oil sweet sections in lacustrine basins in China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Caineng ZOU, Youliang FENG, Zhi YANG, Wenqi JIANG, Tianshu ZHANG, Hong ZHANG, Xiaoni WANG, Jichang ZHU, Qizhao WEI
The geological conditions and processes of fine-grained gravity flow sedimentation in continental lacustrine basins in China are analyzed to construct the model of fine-grained gravity flow sedimentation in lacustrine basin, reveal the development laws of fine-grained deposits and source-reservoir, and identify the sweet sections of shale oil. The results show that fine-grained gravity flow is one
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Low organic matter abundance and highly efficient hydrocarbon generation of saline source rock in the Qaidam Basin, NW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Guoxin LI, Bin ZHANG, Kunyu WU, Songtao WU, Xiaomei WANG, Jing ZHANG, Xuening QI, Na ZHANG, Haoting XING, Chenggang XIAN, He LIU
The geochemical analysis and experimental simulation are comprehensively used to systematically study the hydrocarbon generation material, organic matter enrichment and hydrocarbon generation model of Paleogene source rock in the Western Qaidam Depression, Qaidam Basin, NW China. Three main factors result in low TOC values of saline lacustrine source rock of the Qaidam Basin: relatively poor nutrient
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Gulong shale oil enrichment mechanism and orderly distribution of conventional– unconventional oils in the Cretaceous Qingshankou Formation, Songliao Basin, NE China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Shuichang ZHANG, Bin ZHANG, Xiaomei WANG, Zihui FENG, Kun HE, Huajian WANG, Xiuli FU, Yuke LIU, Chunlong YANG
Through the study of organic matter enrichment, hydrocarbon generation and accumulation process of black shale of the Cretaceous Qingshankou Formation in the Songliao Basin, the enrichment mechanism of Gulong shale oil and the distribution of conventional–unconventional oil are revealed. The Songliao Basin is a huge interior lake basin formed in the Early Cretaceous under the control of the subduction
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Analysis of the world deepwater oil and gas exploration situation Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Zhixin WEN, Jianjun WANG, Zhaoming WANG, Zhengjun HE, Chengpeng SONG, Xiaobing LIU, Ningning ZHANG, Tianyu JI
The global trends in deepwater oil and gas exploration, characteristics of deepwater oil and gas discovery, and layout of deepwater oil and gas exploration business by seven major international oil companies are systematically analyzed using commercial databases (e.g. S&P Global and Rystad) and public information of oil companies. The deepwater area is currently the most important domain for global
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Evolution characteristics and exploration targets of Permian clastic rock reservoirs in Bohai Bay Basin, East China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Yingchang CAO, Peipei SUN, Lihong ZHOU, Guanghui YUAN, Huimin LIU, Da LOU, Zhiping WU, Qiang JIN, Youlu JIANG
Based on core observation, thin section examination, fluid inclusions analysis, carbon and oxygen isotopic composition analysis, and other approaches, the structural and burial evolution histories were investigated, and the diagenetic evolution process and genetic/development models were systematically discussed of the Upper Paleozoic Permian clastic rock reservoirs in the Bohai Bay Basin, East China
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Structural attributes, evolution and petroleum geological significances of the Tongnan negative structure in the central Sichuan Basin, SW China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Fanglei TIAN, Furong WU, Dengfa HE, Xiaohui ZHAO, Huan LIU, Qiaoyi ZHANG, Jinbo LE, Jingyu CHEN, Guo LU
The Tongnan secondary negative structure in central Sichuan Basin has controls and influences on the structural framework and petroleum geological conditions in the Gaoshiti-Moxi area. To clarify the controls and influences, the deformation characteristics, structural attributes and evolution process of the Tongnan negative structure were investigated through a series of qualitative and quantitative
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Tectonic features, genetic mechanisms and basin evolution of the eastern Doseo Basin, Chad Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Huahua GAO, Yebo DU, Lin WANG, Simin GAO, Jie HU, Jianfeng BAI, Hong MA, Yuhua WANG, Xinshun ZHANG, Hao LIU
The features of the unconformity, fault and tectonic inversion in the eastern Doseo Basin, Chad, were analyzed, and the genetic mechanisms and basin evolution were discussed using seismic and drilling data. The following results are obtained. First, four stratigraphic unconformities, i.e. basement (Tg), Mangara Group (T10), lower Upper Cretaceous (T5) and Cretaceous (T4), four faulting stages, i.e
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Global oil and gas development in 2022: Situation, trends and enlightenment Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Zuoqian WANG, Zhe FAN, Xi CHEN, Zifei FAN, Qing WEI, Xi WANG, Wenting YUE, Baolei LIU, Yujia WU
Through analysis of four aspects, including the distribution and production of global oil and gas fields, the distribution and changes of remaining recoverable reserves, the differences in oil and gas production between regions/countries, and the development potential of oil and gas fields with production capacity not built and to be built, this paper presents the situation and trends of global oil
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Performance evaluation of microemulsion acid for integrated acid fracturing in Middle Eastern carbonate reservoirs Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Yunjin WANG, Fujian ZHOU, Hang SU, Yuan LI, Fuwei YU, Rencheng DONG, Qing WANG, Junjian LI
Considering the characteristics of carbonate reservoirs in the Middle East, a low-viscosity microemulsion acid that can be prepared on site and has an appropriate retardation ability was developed. It was compared with four conventional acid systems (hydrochloric acid, gelled acid, emulsified acid and surfactant acid) through experiments of rotating disk, multistage acid fracturing and core flooding
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An improved coupled flow-geomechanical model for cyclic steam stimulation Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 YADALI JAMALOEI Benyamin
Considering the pore deformation and permeability changes during dilation-recompaction in cyclic steam stimulation (CSS), an existing geomechanical model is improved and thermo-mechanically coupled with the flow equations to form a coupled flow-geomechanical model. The impacts of dilation-recompaction parameters can be quantified through sensitivity analysis and uncertainty assessment utilizing the
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A high-temperature resistant and high-density polymeric saturated brine-based drilling fluid Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Xianbin HUANG, Jinsheng SUN, Kaihe LYU, Xiaodong DONG, Fengbao LIU, Chongyang GAO
Three high-temperature resistant polymeric additives for water-based drilling fluids are designed and developed: weakly cross-linked zwitterionic polymer fluid loss reducer (WCZ), flexible polymer microsphere nano-plugging agent (FPM) and comb-structure polymeric lubricant (CSP). A high-temperature resistant and high-density polymeric saturated brine-based drilling fluid was developed for deep drilling
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Impact frequency variation of self-excited oscillation pulsed supercritical carbon dioxide jets Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-10-19 Helian SHEN, Yong LIU, Jianping WEI, Liming QIU, Haichao LI, Yujie DENG
In order to obtain the impact frequency of resonant coal breaking by self-excited oscillation pulsed supercritical carbon dioxide (SC-CO2) jet, large eddy simulation was used to analyze the formation and development process of self-excited oscillation pulsed SC-CO2 jet, the variation of jet impact frequency in the nozzle and the free flow field, and the variation of jet impact frequency at different
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The status and development strategy of coalbed methane industry in China Pet. Explor. Dev. (IF 7.5) Pub Date : 2023-08-18 Fengyin XU, Wei HOU, Xianyue XIONG, Borui XU, Peng WU, Hongya WANG, Kun FENG, Jian YUN, Shuguang LI, Lei ZHANG, Xia YAN, Huijun FANG, Qian LU, Delei MAO
To achieve the goals of carbon peaking and carbon neutrality under the backgrounds of poor resource endowments, weak theoretical basis and other factors, the development of the coalbed methane industry of China faces many bottlenecks and challenges. This paper systematically analyzes the coalbed methane resources, key technologies and progress, exploration effect and production performance in China