中国石油大学学报（自然科学版）2018，Vol.42Issue(3)：1-11,11.DOI:10.3969/j.issn.1673-5005.2018.03.001
济阳坳陷四扣洼陷湖相碳酸盐岩岩溶储层特征及其发育模型
Characterization and developmental model of karstic reservoirs in lacustrine carbonate strata of Eocene Sikou Sag, Jiyang Depression
摘要
Abstract
Based on observations of core and thin sections,combined with the analysis of well logging and seismic data, the karstification type,its characteristics in lacustrine carbonate,and its control on porosity distribution were studied. The lacus-trine carbonate mainly underwent syndepositional karstification,early phase near surface karstification, supergene karstifica-tion and buried karstification.During the depositional stage of reef and shoal, the unstable component was dissolved by the meteoric water,and lots of selective dissolution pores were formed by syndeposition alkarstification. With the decrease of lake level,weak consolidated reef and shoal underwent early near surface karstification, primary texture of lacustrine carbonate was destroyed,and dissolution fractures and caves were formed, which were accompanied by development of plant root and pupae.The influence of supergene karstification in plane is large,whereas the development depth of relevant reservoir can on-ly be found within ten meters under the top of the Es4s unconformity. A single cave is composed of top vertical dissolution belt,middle brecciated filled belt and basal weak dissolution belt. The grain and cement were dissolved occasional by the or-ganic acid during the deep burial phase,resulting in many cellular and punctate porosities. Multiphase karstification is the key location to the formation of high quality reservoir in lacustrine carbonate. Overall,variability of karstification reservoir is observed from the shore line to the basin centre, where supergene karstification reservoir, syndepositional karstification and early phase karstification reservoir gradually give way to complex karstification reservoir and buried karstification.关键词
岩溶作用/储层特征/发育模型/湖相碳酸盐岩/济阳坳陷Key words
karstification/reservoir characteristic/developmental model/lacustrine carbonate/Jiyang Depression分类
天文与地球科学引用本文复制引用
杨勇强,师政,邱隆伟,刘魁元,单宝杰,陈程..济阳坳陷四扣洼陷湖相碳酸盐岩岩溶储层特征及其发育模型[J].中国石油大学学报（自然科学版）,2018,42(3):1-11,11.基金项目
国家重点基础研究发展计划"973"项目(2014CB239002) （2014CB239002）
山东省自然科学基金联合专项(ZR2016DL05) （ZR2016DL05）
中央高校基本科研业务费专项(18CX02007A) （18CX02007A）
