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china Geology 2023年第4期6卷 753-755页

作者： Qiao Zhang Jun-lin Zhou Yu-hong Li Ya-zhuo Niu Wang Guo Shang-wei Ma Yun-peng Zhang Shao-hua Hu Yu Ding Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits Xi’an CenterChina Geological Survey(Geoscience Innovation Center of Northwest China)Xi’an 710119China Shanxi provincial third institute of geological engineering investigation Jinzhong 030620China

1. Objective Among globally known industrial helium-enriched natural gas reservoirs, associated helium is dominantly crust-derived helium(4He), which is generated by the radioactive decay of uranium(U) and thorium(Th) in crustal rocks. These rocks with old ages are also defined as helium source *** accumulation models for helium have revealed that granite is the main and effective helium source rock in the crust(Li YH et al., 2018).

关键词： globally decay source

Natural gas hydrates in the Qinghai-Tibet Plateau: Characteristics, formation, and evolution

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china Geology 2021年第1期4卷 17-31页

作者： You-hai Zhu Shou-ji Pang Rui Xiao Shuai Zhang Zhen-quan Lu oil and gas Resources survey China Geological SurveyBeijing 100083China

The Qinghai-Tibet Plateau(also referred to as the Plateau)is the largest area bearing alpine permafrost region in the world and thus is endowed with great formation conditions and prospecting potential of natural gas hydrates(NGH).Up to now,one NGH accumulation,two inferred NGH accumulations,and a series of NGH-related anomalous indicators have been discovered in the Plateau,with NGH resources predicted to be up to 8.88×10^(12) m^(3).The NGH in the Qinghai-Tibet Plateau have complex gas components and are dominated by deep thermogenic *** occur in the Permian-Jurassic strata and are subject to thin permafrost and sensitive to ***,they are distinctly different from the NGH in the high-latitude permafrost in the arctic regions and are more different from marine *** formation of the NGH in the Plateau obviously couples with the uplift and permafrost evolution of the Plateau in spatial-temporal *** permafrost and NGH in the Qilian Mountains and the main body of the Qinghai-Tibet Plateau possibly formed during 2.0–1.28 Ma BP and about 0.8 Ma BP,*** the context of global warming,the permafrost in the Qinghai-Tibet Plateau is continually degrading,which will lead to the changes in the stability of ***,The NGH of the Qinghai-Tibet Plateau can not be ignored in the study of the global climate change and ecological environment.

关键词： Natural gas hydrates(NGH) Permafrost Global climate change Qinghai-Tibet Plateau

Design and feasibility analysis of a new completion monitoring technical scheme for natural gas hydrate production tests

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china Geology 2023年第3期6卷 466-475页

作者： Qiu-ping Lu Yan-jiang Yu Xie Wen-wei Jin-qiang Liang Jing-an Lu Ben-chong Xu Hao-xian Shi Hao-yu Yu Ru-lei Qin Xing-chen Li Bin Li Guangzhou Marine geological survey China Geological SurveyMinistry of Natural ResourcesGuangzhou 510075China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Institute of Exploration Techniques China Geological SurveyMinistry of Natural ResourcesLangfang 065000China

As a prerequisite and a guarantee for safe and efficient natural gas hydrates(NGHs)exploitation,it is imperative to effectively determine the mechanical properties of NGHs reservoirs and clarify the law of the change in the mechanical properties with the dissociation of NGHs during NGHs production tests by *** on the development of Japan’s two offshore NGHs production tests in vertical wells,this study innovatively proposed a new subsea communication technology-accurate directional connection using a wet-mate *** helps to overcome the technical barrier to the communication between the upper and lower completion of offshore *** this new communication technology,this study explored and designed a mechanical monitoring scheme for lower completion(sand screens).This scheme can be used to monitor the tensile stress and radial compressive stress of sand screens caused by NGHs reservoirs in real time,thus promoting the technical development for the rapid assessment and real-time feedback of the in-situ mechanical response of NGHs reservoirs during offshore NGHs production tests by depressurization.

关键词： Natural gas hydrates Depressurization test Wet-mate Directional connection Lower completion monitoring In-situ mechanical response of reservoirs oil-gas exploration engineering The South china Sea

Prediction of Shale gas Pressure based on Multi-channel Seismic Inversion in Fuling

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Acta Geologica Sinica(English Edition) 2022年第4期96卷 1237-1245页

作者： XING Lei LI Yu LI Qianqian LIU Yaowen WAN Yunqiang YANG Huiliang Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of EducationOcean University of ChinaQingdaoShandong 266100China Evaluation and Detection Technology Laboratory of Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdaoShandong 266237China Sinopec Chongqing Fuling Shale gas Exploration and Development Co.Ltd. Lidu New District Shale Gas BaseFuling DistrictChongqing 408000China Yantai Coastal Zone geological survey Center Chinese Geological SurveyYantaiShandong 264011China

The accurate prediction of formation pressure is important in oil/gas exploration and ***,the achievement of this goal remains challenging,due to insufficient logging data and the low predictive data accuracy from seismic *** this work,a case study was carried out in the Baima area of Wulong,in order to develop a workflow for accurately predicting shale gas formation *** multi-channel stack method was first used,as well as the inversion of single-channel seismic data,to construct velocity and density models of the *** with the existing welllogging data,the velocity and density models of the whole well section were *** shale gas formation pressure was then estimated using the Eaton *** results show that the multi-channel seismic stacking method has a higher accuracy than the inversion of the formation velocity obtained by the single-channel seismic *** discrepancies between our predicted formation pressure and the actual formation pressure measurement are within an acceptable range,indicating that our workflow is effective.

关键词： seismic stack shale gas pressure prediction precision multi-channel

Physical characteristics of high concentrated gas hydrate reservoir in the Shenhu production test area,South china Sea

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Journal of Oceanology and Limnology 2023年第2期41卷 694-709页

作者： Jiapeng JIN Xiujuan WANG Zhenyu ZHU Pibo SU Lixia LI Qingping LI Yiqun GUO Jin QIAN Zhendong LUAN Jilin ZHOU Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Lab of Submarine Geosciences and Prospecting TechniquesMOE and College of Marine GeosciencesOcean University of ChinaQingdao 266100China Deep-sea Multidisciplinary Research Center&Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Center for Ocean Mega-Science&Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China china National Offshore oil Corporation Research Institute Co.Ltd. Beijing 100028China Guangzhou Marine geological survey China Geological SurveyMinistry of Natural ResourcesGuangzhou 511458China Haikou Center of Marine geological survey China Geological SurveyHaikou 571127China

High concentrated and heterogeneous distribution of gas hydrates have been identified in the gas hydrate production test region in the Shenhu area,South china *** gas hydrate-bearing sediments with high saturation locate at two ridges of submarine canyon with different thickness and saturations just above the bottom simulating *** crossplots of gamma ray,acoustic impedance(P-impedance)and porosity at four sites show that the sediments can be divided into the upper and lower layers at different depths,indicating different geotechnical reservoir ***,the depositional environments and physical properties at two ridges are analyzed and compared to show the different characteristics of hydrate *** porosity,high P-wave velocity,and coarse grain size indicate better reservoir quality and higher energy depositional environment for gas hydrate at Sites W18 and W19 than those at Sites W11 and *** interpretation is that the base of canyon deposits at Sites W18 and W19 characterized by upward-coarsening units may be turbidity sand layers,thus significantly improving the reservoir quality with increasing gas hydrate *** shelf and slope sliding deposits compose of the fine-grained sediments at Sites W11 and *** gas hydrate production test sites were conducted at the ridge of W11 and W17,mainly because of the thicker and larger area of gas hydrate-bearing reservoirs than those at Sites W18 and *** the results provide useful insights for assessing reservoir quality in the Shenhu area.

关键词： reservoir properties gas hydrate production test region depositional environment South china Sea

Latest Progress and Trend Forecast of china’s Shale gas Exploration and Development

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Acta Geologica Sinica(English Edition) 2015年第A1期89卷 211-213页

作者： WANG Yufang ZHAI Gangyi BAO Shujing REN Shoumai GE Mingna ZHOU Zhi oil & gas survey China Geological Survey

1 Introduction With almost five years of efforts, we have made major breakthrough and important advances in shale gas in many areas, such as the marine and continental shale in Sichuan Basin, the continental shale in Erdos Basin and the transitional shale in North china. china has begun shale gas productivity constructions in many shale gas development demonstration areas, such as Chongqing Fuling and Sichuan Changlin-Weiyuan, where early stage large-scale development of shale gas has been started （Zhang, 2010; Li, 2012; Dong et al., 2012; Luo and Li, 2013; Pan and Huang, 2009; Wang, 2014）. china, following U.S. and Canada, has become the third country realizing commercial development of shale gas.

关键词： SHALE gas reservoirs SHALE gas NATURAL gas -- Prospecting PETROLEUM production

Microstructural Characteristics and gas-bearing of the Upper Cretaceous Qingshankou Formation Shale,Southern Songliao Basin

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Acta Geologica Sinica(English Edition) 2015年第A1期89卷 31-32页

作者： GE Mingna REN Shoumai BAO Shujing ZHOU Zhi GUO Tianxu oil & gas survey of china geological survey

Southern Songliao basin consists of four A structural units from west to east： western slopes, southwest ridge, central depression and southeast uplift. Upper Cretaceous Qingshankou Formation shale sedimented in large-scale invasion of the lake, with a quick settlement, super fast filling compensation deposition characteristics and widely deposition of organic-rich, thick black shale interbedded oil shale, which is the most important source rocks on Songliao basin.

关键词： SHALE gas RESEARCH SHALE oils MICROPORES BASINS (Geology) SCANNING electron microscopes china

Discovery of oil and gas Shows in the Lower Cretaceous of the Hongmiaozi Basin, Southeastern Songlibao Peripheral Basin

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Acta Geologica Sinica(English Edition) 2018年第3期92卷 1281-1282页

作者： WANG Dandan ZHANG Jiaodong ZHANG Wenhao ZHOU Xingui LI Shizhen LIU Weibin DONG Qingshui MENG Yuanlin oil and gas survey China Geological Survey Beijing 100083 China Jilin University Changchun 130016 China Northeast Petroleum University Daqing 163318 Heilongjiang China

Objective The Hongmiaozi Basin in the southeastern part of the Songliao peripheral basin is a new oil and gas exploration area with a very low exploration *** basin covers an area of 795 km;.It is adjacent to the Liuhe Basin and Tonghua Basin in the north,and to the Huanren Basin in the *** order to identify the basic oil and gas geological characteristics,the deep structures and the

关键词： Discovery of oil and gas Shows in the Lower Cretaceous of the Hongmiaozi Basin Southeastern Songlibao Peripheral Basin

Maturity Assessment of the Lower Cambrian and Sinian Shales Using Multiple Technical Approaches

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Journal of Earth Science 2021年第5期32卷 1262-1277页

作者： Wei Yang Sheng He Gangyi Zhai Ze Tao Xiaoqing Yuan Sile Wei Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China oil&gas survey China Geological SurveyBeijing 100083China

The Lower Cambrian Niutitang and Sinian Doushantuo shales are the most important and widespread source rocks and target layers in South china. Reliable data of the thermal maturity of organic matter(OM) is widely used to assess hydrocarbon generation and is a key property used in determining the viability and hydrocarbon potential of these new shales. Nevertheless, traditional thermal maturity indicators are no longer suited to the vitrinite-lack marine shales. This study aims to combine high throughput Raman and infrared spectroscopy analysis to confirm and validate the thermal maturity in comparison with the bitumen reflectance(R_(b)). Raman parameters such as the differences between the positions of the two bands(V_(G)–V_(D)) are strong parameters for calculating the thermal maturity in a large vitrinite reflectance(R_(o)) ranging from 1.60% to 3.80%. The infrared spectroscopy analysis indicates that the aromatic C=C bands and CH_(2)/CH_(3) aliphatic groups both are closely correlated with thermal maturity. The calculated R_(o) results from Raman and infrared spectroscopy are in strong coincidence with the R_(b). The relationships between R_(b) and pore volumes/surface areas(calculated from N_(2) adsorption) indicate that the sample with R_(b) of 3.40% has the lowest pore volumes and surface areas. Focused ion beam scanning electron microscopy(FIB-SEM) observations of OM pores indicate that R_(o) of approximately 3.60% may be an upper limit for OM porosity development. Obviously, kerogen Raman and infrared spectroscopy can indicate methods for reducing the risk in assessing maturity with practical, low-cost accurate results. Exploration of shale gas in the high maturity(>3.40%–3.60%) region carries huge risks.

关键词： thermal maturity marine shale kerogen raman spectroscopy infrared spectroscopy

Fractal characterization of pore structure and its influence on CH_(4) adsorption and seepage capacity of low-rank coals

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Frontiers of Earth Science 2022年第4期16卷 916-933页

作者： Guangyuan MU Haihai HOU Jiaqiang ZHANG Yue TANG Ya-nan LI Bin SUN Yong LI Tim JONES Yuan YUAN Longyi SHAO State Key Laboratory of Coal Resources and Safe Mining and College of Geoscience and surveying Engineering China University of Mining and TechnologyBeijing 100083China College of Mining Liaoning Technical UniversityFuxin 123000China oil&gas Resource survey Center China Geological SurveyMinistry of Land and ResourceBeijing 100029China Department of Coalbed Methane Research Institute of Petroleum Exploration and DevelopmentPetroChinaBeijing 100083China School of Earth and Environmental Sciences Cardiff UniversityCardiff CF103YEUK

The pore structures of coal can directly affect the adsorption and seepage capacity of coalbed methane(CBM),which therefore is an important influence on CBM exploration and *** this study,the pore structures of low-rank coals from the Middle Jurassic Xishanyao Formation in the southern Junggar Basin were analyzed,and the fractal dimensions(D1,D2,D3 and D4 corresponding to pore sizes of 0-5 nm,5-100 nm,100-1000 nm and 1000-20000 nm,respectively)were calculated to quantitatively describe these coal pore *** results show that Xishanyao coal is characterized by open pore morphology,good pore connectivity and well-developed seepage pores and microfractures,which is beneficial to CBM *** D1 and D2 can be used to characterize the pore surface and structure of adsorption pores *** D3 and D4 can be used to represent the pore structure of seepage *** with adsorption pores,the structure of seepage pores is more affected by the change of coal *** D1 is better than D2 in characterizing the methane adsorption *** D1>2.2,D1 is positively correlated with Langmuir volume(VL)and negatively correlated with Langmuir pressure(PL),while D2 shows a weak opposite *** coals with the higher D1 and lower D2 are associated with a higher VL,indicating the coal reservoir with more complex pore surfaces and simpler pore structures has stronger methane adsorption capacity.D4 is better than D3 in characterizing the methane seepage *** porosity and permeability of coal reservoirs increase with the increase of D4,while D3 displays an opposite trend,which is mainly related to the well-developed *** well-developed fracture system enhances the seepage capacity of the Xishanyao coal *** study reveals the fractal characteristics of pore structure and its significant influence on adsorption and seepage capacity of low-rank coal.

关键词： southern Junggar Basin Middle Jurassic low-rank coal coalbed methane pore structure fractal dimensions