四川盆地华蓥山西侧低缓构造区石炭系黄龙组分布与圈闭条件
Distribution and trap conditions of the Carboniferous Huanglong Formation in the low and gentle structural area on the western side of Huaying Mountain,Sichuan Basin
谷明峰 1董景海 2付小东 1应玉双 2朱茂 1田兴旺 3朱可丹 1叶茂 3朱心健 1李文正 1张建勇1
作者信息
- 1. 中国石油杭州地质研究院
- 2. 中国石油大庆油田有限责任公司勘探事业部
- 3. 中国石油西南油气田公司勘探开发研究院
- 折叠
摘要
四川盆地石炭系黄龙组孔隙型白云岩储层是重要的油气勘探对象,也是川东地区的重点产层.基于近年来采集的高品质地震资料,结合钻井、野外露头剖面等资料,在井震标定、地震正演模型建立的基础上,对华蓥山西侧的石炭系黄龙组区域分布、志留系烃源灶及成藏条件进行综合地质分析,取得3项主要认识:①华蓥山西侧石炭系大面积分布,碳酸盐岩有利区面积超8 000 km2,预测厚度最大可达40 m,具备形成规模储层的地层、沉积基础;②受古隆起斜坡带、地层剥蚀带和断裂带控制,发育平昌—巴中、广安—渠县2个大型圈闭发育区带,面积总计可达5460 km2,具备规模成藏有利条件;③平昌—巴中地区气源条件较好,构造圈闭发育,可形成下生上储的成藏组合,是寻找规模天然气储量的有利地区.
Abstract
Since the 1980s,the porous dolomite reservoir of Huanglong Formation of Carboniferous in Sichuan Basin has been an important exploration object and a key production layer in the east Sichuan Basin.With the gradual increase of reserves utilization,it is urgent need for discovery and replacement of new reserves.In recent years,with the addition of high-quality seismic data,combined with drilling and outcrop data,comprehensive geological analysis of Carboniferous strata,Silurian hydrocarbon sources and reservoir-forming conditions on the western side of Huaying Mountain has been made,and three main understandings have been obtained:(1)Carboniferous strata are distributed in a large area on the western side of Huaying Mountain.The favorable area of carbonate rocks is over 8 000 km2,and the predicted thickness is up to 40 m,which provides stratigraphic and sedimentary basis for the formation of large-scale reservoirs.(2)Pingchang-Bazhong and Guang'an-Quxian large trap groups with a total area of 5 460 km2 are developed under the control of paleo-uplift slope belt,stratigraphic denudation belt and fault belt,which have favorable conditions for large-scale reservoir formation;(3)The Pingchang-Bazhong trap development area,if the Carboniferous reservoir is developed,has good gas source conditions,well-developed structural traps,and favorable accumulation combination of lower sources and upper reservoirs,so it is a favorable area to explore for large-scale natural gas reserves.
关键词
碳酸盐岩/薄层预测/圈闭条件/成藏条件/石炭系/华蓥山西侧/四川盆地Key words
carbonate rock/thin layer prediction/trapping conditions/accumulation conditions/Carboniferous/western side of Huaying Mountain/Sichuan Basin引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据