江汉盆地潜江凹陷盐湖碳酸盐岩油藏勘探突破与启示

doi:10.3969/j.issn.1672-7703.2025.01.006

摘要/Abstract

摘要： 潜江凹陷历经60年勘探，资源探明率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四类主要岩石类型，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”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。通过勘探实践得到四点重要启示，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。

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

Abstract: After 60 years of exploration, over 70% of the resources have been discovered in Qianjiang Sag. The exploration degree of conventional sandstone oil reservoirs is high. Saline lacustrine carbonate rocks deposit with a low degree of research and exploration, which is a potentially important area for increasing reserves. In this study, by strengthening the basic research of lithofacies and logging interpretation,the old well data are re-recognized. It is considered that the lacustrine carbonate rocks of Qianjiang Formation are deposited several layers in vertical direction, which cumulative thickness is more than one hundred meters.Four main rock types are identified: granular carbonate,micritic carbonate, mixed granular rock and mixed fine grain rock. The favorable areas of carbonate rocks are zonally distributed. Study shows that shale, micritic carbonate and mixed granular rock are high-quality source rocks of Qianjiang Formation, granular carbonate and granular mixed rock are high-quality reservoirs. The carbonate reservoir of the Qianjiang Formation has the characteristics of ‘lithofacies control reservoir, reservoir physical property control rich’ oil enrichment controlling factors. Researching new insights guides the exploration in lacustrine carbonate reservoirs, significant achievements have been made in Tan Kou and Zhong Shi area, confirming a total resource volume of carbonate reservoir Over 100 million tons, becoming a new area of succession for exploration and reserve enhancement. It is an important guide and reference for deepening the oil exploration of salina lake carbonates in Jianghan Basin, as well as expanding the exploration of new areas in the similar faulted basins in the east.

Key words: Qianjiang Sag；saline lake；Qianjiang Formation, carbonate reservoir；oil accumulation recognition, exploration breakthrough;important implications

中图分类号:

TE122.1

王必金, 包汉勇, 吴世强, 刘爱武, 郭丽彬, 俞映月, 徐毓珠, 赵文. 江汉盆地潜江凹陷盐湖碳酸盐岩油藏勘探突破与启示[J]. 中国石油勘探, 2025, 30(1): 68-78.

Wang Bijin, Bao Hanyong, Wu Shiqiang, Liu Aiwu, Guo Libin, Yu Yingyue, Xu Yuzhu, Zhao Wen. Exploration breakthrough and implication in saline lake carbonate reservoir in Qianjiang Sag of Jianghan Basin[J]. China Petroleum Exploration, 2025, 30(1): 68-78.

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