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储层物性对多期原油成藏的控制作用研究——以准东火烧山地区二叠系平地泉组为例

The influence of reservoir physical properties on multi-stage oil accumulation: An example from Permian Pingdiquan Formation, Huoshaoshan area, eastern Junggar Basin
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摘要 为弄清火烧山地区二叠系平地泉组低渗透储层原油成藏规律,在烃源岩评价和原油特征研究的基础上,进行储层物性对多期原油成藏控制作用分析。研究表明,火北和火烧山背斜烃源岩均处于低成熟阶段,沉积环境和成岩作用导致的储层物性差异是造成这两个地区原油性质不一致的重要因素。火北储层岩石颗粒细小,压实作用较强,孔隙度、渗透率较低,储层物性较差,其对应的原油成熟度低;火烧山背斜储层孔隙度较高,渗透率相对较好,原油成熟度高于火北地区,具有混源的特征。在此基础上建立了火烧山地区二叠系平地泉组致密油控藏模式:火烧山背斜储层物性较好,具“两期成藏”的特征,原地低成熟原油仅占据部分孔隙,后期还捕获了经断裂向上调整而来的火东向斜的成熟原油;而火北地区储层致密,孔隙空间大部分被自身源岩低成熟原油充注,表现出“自生自储一期成藏”的特征。 Oil accumulation characteristics in low-permeability reservoir of Permian Pingdiquan Formation, Huoshaoshan area were studied through source rock evaluation, oil characteristics and reservoir physical properties analyses.Source rocks of Huobei and Huoshaoshan anticlines were at low-mature stage,and the diversity of reservoir physical properties influenced by sedimentary environment and diagenesis is the key factor to cause oil property differences.The reservoir porosity and permeability of Huobei are low because rock particles are fine and are affected by a strong compaction,and the oil maturity is low.While the reser- voir physical properties of Huoshaoshan anticline are relatively high, and the oil maturity is higher than that of Huobei,which shows a property of mixed sources.Through the research above,reservoir-controlling mechanisms were established for tight oil of this area. Huoshaoshan anticline reservoir has the feature of "two stage accumulation" with good reservoir physical property,which accumulates not only local low-mature products, but higher maturity oil from Huodong syncline by the fracture adjustment.Because reservoir in Huobei is tight,the pore space is almost filled with its own low-mature crude oil,which has the charac teristics of "self-generation and self-preservation as well as one-period accumulation".
作者 陈世加 黄海 邹贤利 王力 马捷 李勇 Chen Shi-jia1,2 , Huang Hai1 , Zou Xian-li1 , Wang li1 , Ma Jie1 , Li Yong1 ( 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China ; 2.Sichuan Key Laboratory of Natural Gas Geology ,Chengdu 610500 ,China )
出处 《天然气地球科学》 EI CAS CSCD 北大核心 2016年第11期1953-1962,共10页 Natural Gas Geoscience
基金 国家重点基础研究发展计划(“973”)项目“中国陆相致密油(页岩油)形成机理与富集规律基础研究”(编号:2014CB239005) 国家自然科学基金项目“固体沥青对储层物性、孔隙结构及测井响应的定量评价”(编号:41572137) 国家自然基金“泥质岩层对低渗透砂岩储层油气成藏的控制机理研究”(编号:41502146)联合资助.
关键词 火烧山地区 平地泉组 致密油 储层物性 原油成熟度 Huoshaoshan area Pingdiquan Formation Tight oil Reservoir physical parameters Oil maturity
作者简介 陈世加(1964-),男,广东大埔人,教授,博士生导师.主要从事油气成藏、地球化学以及致密油气勘探研究.E—mail:chensjl964@swpu.edu.cn.
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