中国石油大学学报（自然科学版）2023，Vol.47Issue(6)：13-25,13.DOI:10.3969/j.issn.1673-5005.2023.06.002
准噶尔中部4区块侏罗系油气输导体系与油气成藏关系
Relationship between hydrocarbon migration system and reservoir formation in the 4th Block of central Junggar Basin
摘要
Abstract
The Jurassic reservoirs in the 4th Block of central Junggar Basin exhibit characteristics of mixed source and multi-stage filling.The hydrocarbon migration system,formed by a combination of faults and sand bodies,plays acrucial role in controlling the migration and accumulation of oil and gas.By utilizing geological,logging and seismic data,this study aims to characterize the types and distribution characteristics of this hydrocarbon migration system and elucidate the dominant hydro-carbon migration patterns and their influence on the distribution and accumulation mode of oil and gas.The research reveals that the oil source faults serving as efficient transport channels(indicated by an evaluation coefficient of fault transport effec-tiveness less than 3.5 and a fault opening and closing coefficient greater than 1)act as vertical migration pathways,connect-ing the source rock with the reservoir.Partially and completely connected sand bodies,with a sand-ground ratio greater than 30%,function as lateral migration channels for oil and gas.The predominant hydrocarbon migration system include the T-type fault-sand combination pattern and the staircase-type fault-sand combination pattern.In these patterns,the convergence surface of robust transmission faults aligns with the ridge of connected sand body structures,which controls the distribution of oil and gas reserves.The comprehensive evolution of migration system and the hydrocarbon charging process establish a mod-el for reservoir formation,encompassing mixed sourcing hydrocarbon supply,a two-stage filling process,and fault-sand com-posite transmission and conduction.The fault and sand bodies jointly transpor hydrocarbons during the initial phase of forma-tion,while in the subsequent phase,the fault takes on the primary role as the transport channel.关键词
输导体系/断层/砂岩输导层/控藏作用/侏罗系/准噶尔盆地Key words
hydrocarbon migration system/fault/sandstone transport layer/control function/Jurassic/Junggar Basin分类
能源科技引用本文复制引用
沈澈,蒋有录,杨佳颖,方旭庆,鲁修麟..准噶尔中部4区块侏罗系油气输导体系与油气成藏关系[J].中国石油大学学报（自然科学版）,2023,47(6):13-25,13.基金项目
中石化新疆新春石油开发有限责任公司科研项目(30203569-21-2C0613-0055) （30203569-21-2C0613-0055）
