摘要
碳酸盐岩生物礁作为重要的油气藏类型,在全球油气田产量中占有重大比例。近年来,在四川盆地东部地区上二叠统长兴组生物礁油气藏勘探中取得了重大突破。川东—鄂西地区发育开江—梁平海槽与城口—鄂西海槽,海槽侧缘台地边缘带的明确对于指导二叠系、三叠系礁、滩储层勘探开发具有重要的现实意义。通过钻井资料分析、典型沉积剖面观测以及地震资料特征响应,研究结果表明:①位于原开江—梁平海槽南部末端的大猫坪—福禄场一线以南的曲水—建南地区长兴期存在浅洼沉积;②曲水—建南浅洼两侧是长兴组生物礁发育的有利区;③结合建南地区钻井资料,开江—梁平海槽经曲水—建南浅洼与城口—鄂西海槽有直接连通的可能,该发现将进一步扩展台地边缘带的分布范围,为区内礁、滩气藏勘探开发拓展全新的后备领域。
As an important reservoir type,carbonate bioherm contributes enormously to global oil and gas production.In recent years, great breakthrough has been made in an exploration of biohermal reservoirs of Upper Permian Changxing Formation,eastern Sichuan Basin.Kaijiang-Liangping and Chengkou-E'xi troughs are developed in one area between eastern Sichuan Basin and western Hubei province.So,to determine marginal platform belts along outer edge of troughs is practically significant to guide the exploration and development of Permian and Triassic biohermal beach reservoirs.In this study,some drilling data,typical sedimentary profile,and seismic-data characteristic response were analyzed.Results show that (1) in the Changxing period,there were shallow sags grown in Qushui-Jiannan area to the south of Damaoping-Fuluchang at the southern end of Kaijiang-Liangping trough;(2) both sides of Qushui-Jiannan shallow sag are just favorable belts for development of Changxing Formation bioherm;and (3) it’s highly possible for Kaijiang-Liangping trough to connect directly with Chengkou-E’xi trough through Qushui-Jiannan shallow sag.This finding will further expand a distribution range of marginal platform belts,so as to develop many new reserve belts in this area.
作者
刘菲
冯亮
陈智雍
陈家文
刘冬玺
朱宜新
廖义沙
张文济
易娟子
Liu Fei;Feng Liang;Chen Zhiyong;Liu Dongxi;Zhu Yixin;Liao Yisha;Zhang Wenji;Yi Juanzi(Chongqing Gas District,PetroChina Southwest Oil&Gasfield Company,Chongqing 404100,China)
出处
《天然气勘探与开发》
2019年第3期10-20,共11页
Natural Gas Exploration and Development
基金
中国石油西南油气田分公司科研项目“开江-梁平海槽南段长兴组沉积特征及礁体分布研究”(编号:20160301-09-01)
关键词
开江-梁平海槽
曲水-建南
浅洼沉积
长兴期
生物礁
川东地区
Kaijiang-Liangping trough
Qushui-Jiannan
Shallow sag
Changxing Formation
Bioherm
Eastern Sichuan Basin
