摘要
四川盆地侏罗系大安寨段超致密介壳灰岩的研究薄弱,严重制约其致密油资源的开发。综合运用岩心、钻井、测井、试油、分析化验资料,对川中地区超致密介壳灰岩相对优质储层和勘探突破方向进行研究。结果表明:川中地区大安寨段介壳灰岩致密化程度高,灰岩物性与埋藏深度呈正相关;川中地区南部储层物性好于川中地区东北部,相对优质储层是油井高产稳产的基础;相对优质储层的电性识别标准为自然伽马小于40 API、声波时差大于等于164μs/m,主要分布在川中地区东南部的西充—南充—广安—遂宁带;大安寨段致密油的有效源储配置模式是烃源岩与相对优质储层横向上呈接触关系;有利勘探目标为四川盆地川中地区南部桂花油田西南侧的磨溪地区。研究成果为四川盆地致密油勘探提供了重要依据。
Study on ultra-tight shell limestone of Jurassic Da’anzhai Member in Sichuan Basin is weak and seriously restricts the development of its tight oil resources. Based on data of core,drilling,logging,oil testing and lab analysis,relative high-quality reservoir and potential exploration area of ultra-tight shell limestone in central Sichuan area are studied. The results show that shell limestone in Da’anzhai Member in central Sichuan has high densification degree,and physical properties of limestone are positively correlated with buried depth. Physical properties of reservoirs in south are better than those in northeast of central Sichuan. Relatively high-quality reservoirs are the basis of high and stable oil production. Electric property identification criteria of relatively high-quality reservoir is that GR is less than 40 API,and acoustic time difference is ≥ 164 μs/m,which is mainly distributed in the Xichong-Nanchong-Guang’an-Suining Belt in southeast of central Sichuan. Effective source-reservoir configuration pattern of Da’anzhai tight oil is the contact between upper horizontal source rock and relatively high-quality reservoir,and favorable exploration target is Moxi area in southwest of Guihua Oilfield in southern Sichuan Basin. The research results provide important basis for tight oil exploration in Sichuan Basin.
作者
唐青松
高明
黄东
白蓉
李育聪
杨智
TANG Qingsong;GAO Ming;HUANG Dong;BAI Rong;LI Yucong;YANG Zhi(PetroChina Southwest Oil and Gas Field Development Management Department,Chengdu 610041,China;PetroChina Sichuan Petrochemical Nanchong Refinery,Nanchong 637000,China;Technical Consulting Center of Petrochina Southwest Oil&Gas Company,Chengdu 610041,China;Exploration and Development Research Institute of PetroChina Southwest Oil&Gas Company,Chengdu 610051,China;China Petroleum Exploration and Development Research Institute,Beijing 100083,China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2022年第5期20-27,共8页
Petroleum Geology & Oilfield Development in Daqing
基金
国家科技重大专项“四川盆地致密油资源潜力、甜点区预测与关键技术应用”(2016ZX05046-006-008)。
关键词
四川盆地
川中地区
大安寨段
相对优质储层
致密介壳灰岩
地震相
勘探方向
Sichuan basin
central Sichuan area
Da’anzhai Member
relatively high-quality reservoir
tight shell limestone
seismic facies
exploration direction
