Discovery and geological knowledge of the large deep coal-formed Qingyang Gas Field, Ordos Basin, NW China

作     者：FU Jinhua WEI Xinshan LUO Shunshe ZUO Zhifeng ZHOU Hu LIU Baoxian KONG Qingfen ZHAN Sha NAN Junxiang FU Jinhua;WEI Xinshan;LUO Shunshe;ZUO Zhifeng;ZHOU Hu;LIU Baoxian;KONG Qingfen;ZHAN Sha;NAN Junxiang

作者机构：PetroChina Changqing Oilfield CompanyXi’an 710018China National Engineering Laboratory of Low Permeability Oil and Gas Field Exploration and DevelopmentXi’an 710018China Research Institute of Exploration and DevelopmentPetroChina Changqing Oilfield CompanyXi’an 710018China Hubei Cooperative Innovation Center of Unconventional Oil and Gas(Yangtze University)Wuhan 430000China Exploration DepartmentPetroChina Changqing Oilfield CompanyXi’an 710018China 

出 版 物：《Petroleum Exploration and Development》 (石油勘探与开发（英文版）)

年 卷 期：2019年第46卷第6期

页      面：1111-1126页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：Supported by the National Key Basic Research and Development Program(973 Program),China(2014CB239003) China National Science and Technology Major Project(2016ZX05050,2017ZX05001002) 

主　　题：Ordos Basin Upper Paleozoic Lower Permian coal-formed gas deep formation high thermal evolution Qingyang large gas field 

摘      要：After 50 years of oil and gas exploration in Longdong area of southwest Ordos Basin,NW China,a deep coal-formed gas field was discovered for the first time in Qingyang *** observation of field outcrops and core,analysis of common,cast and cathode thin sections,Ro and other geochemistry indexes,carbon isotope,electron microscope and other supporting tests and analyses,the hydrocarbon generation,reserves formation and reservoir formation characteristics of gas reservoirs at different buried depths in Yishaan slope were examined and *** deep gas reservoir has an average buried depth of more than 4200 m,and the main gas-bearing formation is the Member 1 of Lower Permian Shanxi Formation,which is characterized by low porosity,low permeability,low pressure and low *** is believed that hydrocarbon generation in thin seam coal source rocks with high thermal evolution can form large gas fields,high-quality sandstone reservoirs with dissolved pores,intergranular pores and intercrystalline pores can still develop in late diagenetic stage under deep burial depth and high thermal evolution,and fractures improve the permeability of *** drying coefficient of natural gas and negative carbon isotope series are typical geochemical characteristics of deep coal-formed *** integrated exploration and development method has been innovated,and the economic and effective development mode of gas fields ofdissecting sand body by framework vertical wells,centralized development by horizontal wellshas been *** discovery and successful exploration of the large gas field has provided geological basis and technical support for the construction of natural gas fields of 100 billion cubic meter scale in the southwest of the basin,and has important guidance for exploration of coal-derived gas with deep buried depth and high thermal evolution widely distributed in China.