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Sedimentary Facies Characteristics of Chang 6 and Chang 7 Members of Yanchang Formation in Heshui Area, China

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Journal of Geoscience and Environment Protection 2024年第9期12卷 182-197页

作者： Xinyuan Liu Shunzhi Yang Shunchao Gou Sen Chang School of Earth Science and Engineering Xian Shiyou University Xian China Shaanxi Key Laboratory of Petroleum Accumulation Geology Xian Shiyou University Xian China Sulige gasfield Development Corporation PetroChina Changqing Oilfield Company Xian China

This paper takes Chang 6 and Chang 7 of Yanchang Formation in Heshui area of China as the research object. This study first divides the strata of Chang 6 and Chang 7. According to the review data, significant geological activities have caused a large settlement of the strata in this area. During the Chang 6 period, a lacustrine basin sedimentary system developed, reaching its peak in the Chang 7 period. The Chang 6 and Chang 7 members primarily feature deep-water gravity flow sedimentary systems, which can be categorized into three subfacies: outer fan, middle fan, and inner fan. These systems also exhibit turbidite fan sedimentary patterns, ranging from deep lake to semi-deep lake facies. By examining these sedimentary models, we can identify different types of turbidite deposits. Understanding the process of gravity flow deposition and the evolution of ancient lakes is crucial for guiding oil and gas exploration and conducting paleogeographic research.

关键词： Stratigraphic Division Gravity Flow Deposition Turbidity Fans oil and gas exploration

oil-gas reservoir in the Mesozoic strata in the Chaoshan depression,northern South China Sea:a new insight from long off set seismic data

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Journal of Oceanology and Limnology 2022年第4期40卷 1377-1387页

作者： Tao XING Guangjian ZHONG Wenhuan ZHAN Zhongquan ZHAO Xi CHEN Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyInnovation Academy of South China Sea Ecology and Environmental EngineeringChinese Academy of SciencesGuangzhou 511458China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Guangzhou Marine Geological Survey China Geological SurveyGuangzhou 510760China University of Chinese Academy of Sciences Beijing 100049China

The Chaoshan depression,a Mesozoic basin in the Dongsha sea area,northern South China Sea,is characterized by well-preserved Mesozoic strata,being good conditions for oil-gas preservation,promising good prospects for oil-gas ***,breakthrough in oil-gas exploration in the Mesozoic strata has not been achieved due to less seismic *** long-off set seismic data were processed that acquired with dense grid with single source and single *** addition,the data were processed with 3D imaging method and fi ner processing was performed to highlight the target *** the new imaging result and other geological information,we conducted integrated interpretation and proposed an exploratory well A-1-1 for potential *** result provides a reliable basis for achieving breakthroughs in oil and gas exploration in the Mesozoic strata in the northern South China Sea.

关键词： Chaoshan depression Mesozoic strata oil and gas exploration long off set seismic data integrated interpretation exploratory well

MESOZOIC PETROLEUM SUPERSYSTEM IN NORTH CHINA

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石油勘探与开发 1996年第6期23卷 85-92页

作者： Niu Jiayu Li Jinchao Xue Liangqing(Research Institute of Petroleum exploration and Development, CNPC, Beijing, 100083, China)

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ＭＥＳＯＺＯＩＣ　ＰＥＴＲＯＬＥＵＭ　ＳＵＰＥＲＳＹＳＴＥＭ　ＩＮ　ＮＯＲＴＨ　ＣＨＩＮＡＭＥＳＯＺＯＩＣＰＥＴＲＯＬＥＵＭＳＵＰＥＲＳＹＳＴＥＭＩＮＮＯＲＴＨＣＨＩＮＡ￥ＮｉｕＪｉａｙｕ；ＬｉＪｉｎｃｈａｏ；ＸｕｅＬｉａｎｇｑｉｎｇ（Ｒｅｓｅａｒｃ...

关键词： Mesozoic era oil resource oil and gas exploration Regional tectonic Palaeoclimate North China Petroleum supersystem

Seismic Technique for Studying Sedimentary Layer: Bohai Basin as an Example

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Acta Geologica Sinica(English Edition) 2012年第5期86卷 1105-1115页

作者： HE Chuansong DONG Shuwen CHEN Xuanhua Institute of Geophysics China Earthquake AdministrationBeijing 100081China Chinese Academy of Geological Sciences Beijing 100037

The upper tertiary to quaternary is the main target layer for oil and gas exploitation in China's Mainland, especially crude oil production in the Bohai Basin accounts for approximately 40% of China’s crude oil production. Therefore, a study of the Upper Tertiary to Quaternary has important significance for science and practical applications. In this study, using the receiver function method, Ps and later phase extraction, the sedimentary thickness and an accurate estimate of velocity ratio can be obtained. The technique is simple, its calculation results are unique, and it can be applied to a study of the sedimentary layer. The technique is promising for oil and gas exploration.

关键词： sedimentary layer oil and gas exploration receiver function Bohai Basin

Petroleum exploration of Craton Basins in China

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Acta Geologica Sinica(English Edition) 2006年第1期80卷 117-126页

作者： ZHANG Kang WANG Junling ~EC Beijing 100083

Craton basins are a significant petroliferous provenance. Having undergone multiple open- dose tectonic cycles and strong reworking of the late Cenozoic tectonic movement, the craton basins in China are highly broken. This has resulted in multi-source and multiphase hydrocarbon generation and later hydrocarbon accumulation so that a complicated spatial assemblage of primary, paraprimary and secondary oil-gas pools has been formed. The primary factors controlling hydrocarbon accumulation include hydrocarbon-generating depressions, paleouplifts, paleoslopes, unconformity surfaces, paleo-karst, faults and fissure systems as well as the later conservation conditions. In consequence, the strategy of exploration for China＇s craton basins is to identify the effective source rocks, pay attention to the different effects of paleohighs and late reworking, enhance studies of the secondary storage space, attach importance to the exploration of lithologic oil-gas reservoirs and natural gas pools, and approach consciously from the secondary oil pools to the targets near the source rocks. At the same time, a complete system of technologies and techniques must be built up.

关键词： craton basin oil and gas exploration multiphase hydrocarbon generation multiphase accumulation reworking of oil-gas pools marine oil and gas

Conceptual models for fracturing in fault related folds

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Mining Science and Technology 2010年第1期20卷 103-108页

作者： LIN Xiubin CHEN Hanlin CHENG Xiaogan SHEN Zhongyan YANG Shufeng XIAO Ancheng Department of Earth Sciences Zhejiang University Hangzhou 310027 China Research Center for the Structures in oil and gas Bearing Basin Ministry of Education Hangzhou 310027 China

Fault related folds and fractures, which always improve reservoirs and trap capacity, especially in the oil and gas fields in western China, are of extreme importance for oil and gas exploration. Based on four assumptions and fault related fold theory, we propose four conceptual models for fracturing in fault related folds, i.e., a simple-step parallel fault bend anticline, a simple-step parallel fault propagation anticline, a multiple-bend fault-bend fold and a break-forward imbricate. Fracture conditions depend on structural evolution and specific site conditions. A case study of the Kulongshan Anticline in the Jiuquan Basin shows that our conceptual models match reality data very well.

关键词： fracturing fault related fold oil and gas exploration

Geological factors associated with unsuccessful exploration wells in the northern margin of the Qaidam basin

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Mining Science and Technology 2009年第2期19卷 241-244页

作者： ZENG Chun-lin JIANG Bo ZHANG Min YIN Cheng-ming MA Li-xie School of Resource and Earth Science China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Research Institute of Petroleum exploration and Development Qinghai Oilfield Company PetroChina Dunhuang Gansu 736202 China

We investigated the geological factors associated with unsuccessful exploration wells in the northern margin of the Qaidam basin to better understand their *** structural situation,the hydrocarbon accumulation mechanism and unsuccessful well data collected from 1996 to 2005 were *** results show that the main geological factors associated with unsuccessful exploration wells are a lack of effective source rocks and a lack of effective traps,as well as the migration-accumulation conditions that exist in this *** basin was reformed by Meso-Cenozoic tectonic ***-stage tectonic activities have both positive and negative effects on hydrocarbon *** rocks distribution,effective migration channels,effective traps and the tectonic evolution effects on hydrocarbons should be the key objects for further studies.

关键词： northern margin of the Qaidam basin oil and gas exploration exploration wells unsuccessful reasons geologicalfactors tectonics

Growth behavior and resource potential evaluation of gas hydrate in core fractures in Qilian Mountain permafrost area, Qinghai-Tibet Plateau

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China Geology 2023年第2期6卷 208-215页

作者： Qing-guo Meng Chang-ling Liu Zhen-quan Lu Xi-luo Hao Cheng-feng Li Qing-tao Bu Yun-kai Ji Jia-xian Wang Key Laboratory of gas Hydrate Qingdao Institute of Marine GeologyChina Geological SurveyMinistry of Natural ResourcesQingdao 266237China Laboratory for Marine Mineral Resources Laoshan LaboratoryQingdao 266237China oil and gas Survey China Geological SurveyMinistry of Natural ResourcesBeijing 100083China Faculty of Engineering China University of GeosciencesWuhan 430074China

The Qilian Mountain permafrost area located in the northern of Qinghai-Tibet Plateau is a favorable place for natural gas hydrate formation and enrichment,due to its well-developed fractures and abundant gas *** the formation and distribution of multi-component gas hydrates in fractures is crucial in accurately evaluating the hydrate reservoir resources in this *** hydrate formation experiments were carried out using the core samples drilled from hydrate-bearing sediments in Qilian Mountain permafrost area and the multi-component gas with similar composition to natural gas hydrates in Qilian Mountain permafrost *** formation and distribution characteristics of multi-component gas hydrates in core samples were observed in situ by X-ray Computed Tomography(X-CT)under high pressure and low temperature *** show that hydrates are mainly formed and distributed in the fractures with good *** ratios of volume of hydrates formed in fractures to the volume of fractures are about 96.8%and 60.67%in two different core *** indicates that the fracture surface may act as a favorable reaction site for hydrate formation in core *** on the field geological data and the experimental results,it is preliminarily estimated that the inventory of methane stored in the fractured gas hydrate in Qilian Mountain permafrost area is about 8.67×1013 m3,with a resource abundance of 8.67×108 m3/*** study demonstrates the great resource potential of fractured gas hydrate and also provides a new way to further understand the prospect of natural gas hydrate and other oil and gas resources in Qilian Mountain permafrost area.

关键词： gas hydrate Growth behavior Core fracture Rock Quality Designation Resource potential evaluation Engineering oil and gas exploration Qilian Mountain permafrost area Qinghai-Tibet Plateau

Permeability test and fuzzy orthogonal analysis of hydrogenated nitrile O-ring

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Petroleum 2015年第1期1卷 46-50页

作者： Qin Hu Changcheng Wan Changxin Wang School of Mechatronic Engineering Southwest Petroleum UniversityChengdu 610500China

In the high temperature,high pressure and high corrosive environment of the oil and gas drilling downhole,the weatherability of rubber sealing material has a great influence on the production *** order to study the important degree of every key environmental factor in downhole influencing the sealing performance of rubber sealing material,a new device of simulating downhole environment is designed to test the permeability of *** sample is hydrogenated nitrile O-ring and orthogonal experiment method is used to do nine tests by getting three levels from temperature,pressure and CO2 volume *** adopts fuzzy orthogonal method to analyze the main effects and the interaction between two factors,taking tensile strength,diameter variety rate and pH value of indicator as evaluation *** results show that:the environmental factor influencing the sealing performance of hydrogenated nitrile O-ring from high to low by turns is temperature,pressure and CO2 volume fraction,while the interaction between temperature and pressure is the most *** provides a new way to study the influence of downhole complex environment on the performance of rubber sealing ***,the results have important reference value to further study the failure mechanism of rubber sealing ring in many environmental factors and the rational use in engineering.

关键词： Hydrogenated nitrile O-ring Permeability Fuzzy orthogonal oil and gas exploration