摘要
为探明阳信洼陷沙一段页岩气富集规律,确定下一步勘探方向,利用地球化学资料分析了页岩气成因类型和来源,通过对已钻井进行剖析,总结了页岩气富集的主要控制因素和页岩气富集规律。研究表明：阳信洼陷沙一段页岩气藏属于生物成因的＂自生自储＂天然气藏。阳信洼陷沙一段页岩气资源量为400×108~500×108m3,气源较充足;沙一中下亚段灰岩及砂岩夹层较发育,并且沙一上亚段泥岩盖层分布稳定,构造活动也较弱,有利于页岩气的富集。研究区东部披覆构造带和南部斜坡带夹层发育,具有单层厚度大、物性好的特点,是研究区页岩气勘探的首选区带。
In order to identify the shale gas enrichment pattern of Sha1 in Yangxin Depression and exploration orientation,geochemical analysis data is used to analyze the shale gas genetic type and sources. The drilled wells are analyzed to determine the major controlling-factors and pattern of shale gas enrichment. Research demonstrates that the shale gas reservoir of Sha1 in Yangxin Depression is classified as a biogenic'self-generation and self-storage'natural gas reservoir. The relatively abundant shale gas resource of Sha1 in Yangxin Depression is 400 × 108-500 × 108m3. Limestone and sandstone interlayers are relatively well-developed in the middle-lower subsection of Sha1 and mudstone cap-rock is also well-developed in the upper subsection of Sha1 with relatively weak tectonic movements,which are favorable to shale gas enrichment. Interlayer is well-developed in the drape structural belt and southern structural belt of eastern study area. The reservoir is featured by large single-layer thickness and high quality,which is the preferred zone for further shale gas exploration.
出处
《特种油气藏》
CAS
CSCD
北大核心
2016年第2期9-13,151,共5页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"深层油气
非常规天然气成藏规律与有利勘探区评价技术"(2011ZX05008-004)
关键词
页岩气
富集规律
生物成因
沙一段
阳信洼陷
济阳坳陷
shale gas
enrichment pattern
biogenesis
Sha1
Yangxin Depression
Jiyang Depression
