Whole petroleum system in Jurassic coal measures of Taibei Sag in Tuha Basin,NW China  

作　　者：ZHI Dongming LI Jianzhong YANG Fan CHEN Xuan WU Chao WANG Bo ZHANG Hua HU Jun JIN Jikun 

机构地区：[1]PetroChina Tuha Oilfield Company,Hami 839009,China [2]PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China [3]PetroChina Hanzhou Research Institute of Geology,Hanzhou 310023,China

出　　处：《Petroleum Exploration and Development》2024年第3期519-534,共16页石油勘探与开发（英文版）

基　　金：Supported by the“Tianshan Talent”Project of Xinjiang(2022TSYCLJ0070);CNPC Technology Project(2023ZZ18)。

摘　　要：Based on the latest results of near-source exploration in the Middle and Lower Jurassic of the Tuha Basin,a new understanding of the source rocks,reservoir conditions,and source-reservoir-cap rock combinations of the Jurassic Shuixigou Group in the Taibei Sag is established using the concept of the whole petroleum system,and the coal-measure whole petroleum system is analyzed thoroughly.The results are obtained in three aspects.First,the coal-measure source rocks of the Badaowan Formation and Xishanyao Formation and the argillaceous source rocks of the Sangonghe Formation in the Shuixigou Group exhibit the characteristics of long-term hydrocarbon generation,multiple hydrocarbon generation peaks,and simultaneous oil and gas generation,providing sufficient oil and gas sources for the whole petroleum system in the Jurassic coal-bearing basin.Second,multi-phase shallow braided river delta–shallow lacustrine deposits contribute multiple types of reservoirs,e.g.sandstone,tight sandstone,shale and coal rock,in slope and depression areas,providing effective storage space for the petroleum reservoir formation in coal-measure strata.Third,three phases of hydrocarbon charging and structural evolution,as well as effective configuration of multiple types of reservoirs,result in the sequential accumulation of conventional-unconventional hydrocarbons.From high structural positions to depression,there are conventional structural and structural-lithological reservoirs far from the source,low-saturation structural-lithological reservoirs near the source,and tight sandstone gas,coal rock gas and shale oil accumulations within the source.Typically,the tight sandstone gas and coal rock gas are the key options for further exploration,and the shale oil and gas in the depression area is worth of more attention.The new understanding of the whole petroleum system in the coal measures could further enrich and improve the geological theory of the whole petroleum system,and provide new ideas for the overall exploration of oil and gas resou

关 键 词：Tuha Basin Taibei Sag Middle and Lower Jurassic whole petroleum system coal measure tight oil and gas coal rock gas shale oil 

分 类 号：P618.13[天文地球—矿床学] TE31[天文地球—地质学]