江汉盆地潜江凹陷盐湖碳酸盐岩油藏勘探突破与启示  

Exploration breakthroughs and implications of saline lake carbonate oil reservoir in Qianjiang Sag,Jianghan Basin

作　　者：王必金[1] 包汉勇[2] 吴世强[3] 刘爱武 郭丽彬[3] 俞映月 徐毓珠 赵文 Wang Bijin;Bao Hanyong;Wu Shiqiang;Liu Aiwu;Guo Libin;Yu Yingyue;Xu Yuzhu;Zhao Wen(Sinopec Jianghan Oilfield Company;Oil and Gas Production Capacity Construction Management Center,Sinopec Jianghan Oilfield Company;Research Institute of Exploration&Development,Sinopec Jianghan Oilfield Company;Exploration Management Department,Sinopec Jianghan Oilfield Company;Research Institute of Petroleum Engineering,Sinopec Jianghan Oilfield Company)

机构地区：[1]中国石油化工股份有限公司江汉油田分公司 [2]中国石油化工股份有限公司江汉油田油气产能建设管理中心 [3]中国石油化工股份有限公司江汉油田分公司勘探开发研究院 [4]中国石油化工股份有限公司江汉油田分公司勘探管理部 [5]中国石油化工股份有限公司江汉油田分公司石油工程技术研究院

出　　处：《中国石油勘探》2025年第1期70-81,共12页China Petroleum Exploration

基　　金：中国石化股份有限公司项目“咸化湖盆碳酸盐岩沉积储层特征研究”(ZKD0224001);“咸化湖盆碳酸盐岩成藏富集规律及综合评价研究”(ZKD0224002);中国石化股份有限公司江汉油田分公司项目“江汉探区湖相碳酸盐岩沉积环境与岩相组合特征研究”(JKD0224002)。

摘　　要：江汉盆地潜江凹陷历经60年勘探,资源探明率达70%以上,常规砂岩油藏勘探程度高,潜江组盐湖碳酸盐岩发育,研究和勘探程度低,是潜在的重要增储领域。通过加强岩相学、测井解释等基础研究,开展老井资料重新认识,认为潜江组湖相碳酸盐岩在纵向上多个层位发育,累计厚度超百米。识别出颗粒碳酸盐岩、泥晶碳酸盐岩、颗粒混积岩和细粒混积岩4类主要岩石类型,平面上碳酸盐岩有利区呈环带分布;开展成藏条件的再认识,潜江组泥晶碳酸盐岩和颗粒混积岩为潜江组优质烃源岩,以及颗粒碳酸盐岩和颗粒混积岩为优质储层;碳酸盐岩储层具有“岩性岩相控藏,储集物性控富”的油气富集特征。研究新认识指导湖相碳酸盐岩油藏油气勘探,在潭口地区和钟市地区连续取得突破,具有超亿吨资源潜力,成为勘探增储的现实接替新领域。通过勘探实践得到4点重要启示,对深化江汉盆地盐湖碳酸盐岩油气勘探,以及东部类似断陷盆地新领域的扩大勘探具有重要指导和借鉴作用。After 60 years of exploration,the proportion of proven oil reserves in Qianjiang Sag is over 70%,and the exploration degree of conventional sandstone oil reservoirs is high.The saline lake carbonate rocks were developed in Qianjiang Formation,with a low degree of study and exploration,indicating a potential field for increasing reserves.By strengthening the basic study of lithofacies and logging interpretation,the old well data is re-analyzed,which indicates that the lacustrine facies carbonate rocks were developed in multiple sections in Qianjiang Formation,with a cumulative thickness of more than 100 m.Four main rock types are identified,including granular carbonate rock,micritic carbonate rock,granular mixed rock and fine-grained mixed rock.The favorable zone of carbonate rocks shows a zonal distribution pattern on the plane.The re-analysis of hydrocarbon accumulation conditions shows that micritic carbonate rock and granular mixed rock are high-quality source rocks in Qianjiang Formation,while granular carbonate rock and granular mixed rock serve as high-quality reservoirs.The hydrocarbon enrichment in carbonate reservoirs showed characteristics of“oil accumulation controlled by lithology and lithofacies,oil enrichment controlled by reservoir physical properties”.The new understanding has guided the exploration of lacustrine facies carbonate oil reservoirs,and significant breakthroughs have been made in Tankou and Zhongshi areas,proving a total oil resource volume of more than 100 million tons,which is a realistic replacement field for increasing reserves.The four important implications from exploration practice have significant guidance and reference for deepening exploration of saline lake carbonate oil reservoirs in Jianghan Basin,as well as expanding the new exploration fields in similar fault basins in eastern China.

关 键 词：潜江凹陷 盐湖 潜江组 碳酸盐岩油藏 成藏认识 勘探突破 重要启示 

分 类 号：TE122.32[石油与天然气工程—油气勘探]