摘要
近几年,在上扬子地区,中国石化在普光、元坝,中国石油在磨溪、高石梯礁滩相储层相继取得重大油气突破。为借鉴上扬子礁滩相储层勘探经验,在下扬子三叠系寻找礁滩相储层,在对三叠系进行统层的基础上,结合三叠系沉积前古构造背景,利用露头及钻井资料,开展了下扬子三叠系单井相、连井相及平面相分析。认识到下扬子青龙组可划分为两个海进、海退旋回;广德—无锡—江阴一带在二叠系时为一水下构造高地,在此古构造背景下,该地区于上、下青龙组二段时期由于海退形成了两套台地边缘相鲕粒浅滩,能够作为油气良好储层。
In resent years, SINOPEC achieves a significant breakthrough in Puguang and Yuanba area, and PetroChina achieves a significant breakthrough in Moxi and Gaoshiti reef fiat facies reservoir in upper Yangtze area. According to reef fiat facies reservoir exploration experience in upper Yangtze area, reef fiat facies reservoir is found in Triassic of low Yangtze area, in addition, based on stratum statistics, combined with palaeostructure of pre-sedimentation in Triassic and by using outcrop and drilling well data, this paper analyzes single well facies, well tie facies and plane facies. The results show that Qinglong formation in lower Yangtze area can be divided into two marine transgression-regression cycles, in addition, Guang De to Wuxi to Jiangyin area is a underwater high land in Permian, furthermore, affected by ancient tectonic and due to regression, this area forms two sets of platform edge oolitic shoal in the second period of upper and lower Qinglong formation, which can be good oil and gas reservoir.
出处
《油气藏评价与开发》
CSCD
2016年第6期1-6,共6页
Petroleum Reservoir Evaluation and Development
关键词
下扬子
三叠系
礁滩相储层
lower Yangtze area, Triassic, reef flat facies reservoir
