中国石油大学学报（自然科学版）2017，Vol.41Issue(3)：49-55,7.DOI:10.3969/j.issn.1673-5005.2017.03.006
岩溶型碳酸盐岩储层中缝洞复合体及其油气地质意义
Identification of fracture-vug complex from karsted carbonates and its significance in petroleum geology
摘要
Abstract
Medium to large scale fractures and caves are important reservoir spaces in karsted oilfields,which has been proven by petroleum exploration and production in Tahe Oilfield.However,a great number of small vugs or caves distributed along fractures have been found in outcrops of the Ordovician carbonates and the cores from Tahe Oilfield.These small caves are connected by fractures to form very good hydrocarbon storages and seepage channels,which are referred to as fracture-vug complex.By investigations on outcrops,drilling-cores and well-loggings,our study shows that the fracture-vug complexes are distributed widely in karsted carbonates including surface karst zone,vadose karst zone and runoff karst zone,as well as among the fault induced fractures.Four genetic types of fracture-vug complexes can be recognized.Formation of the fracturevug complexes are recognized that carbonate fractures or joints were enlarged by atmospheric water leaching,and caves were formed at cross of fractures or joints and at easy corroding lithologies so that resulted in small caves distributing along fractures and along easy corroding beddings.Identification of fracture-vug complex helps to predict and evaluate reservoir spaces in karsted carbonate rocks.关键词
碳酸盐岩/岩溶作用/储集空间/缝洞复合体/塔河油田Key words
carbonate/karstification/reservoir space/fracture-vug complex/Tahe Oilfield分类
天文与地球科学引用本文复制引用
金强,程付启,田飞..岩溶型碳酸盐岩储层中缝洞复合体及其油气地质意义[J].中国石油大学学报（自然科学版）,2017,41(3):49-55,7.基金项目
国家自然基金重点支持项目(U1663204) （U1663204）
国家科技重大专项(2016ZX05014-002) （2016ZX05014-002）
国家“973”重点基础研究发展计划项目(2011CB201001) （2011CB201001）
