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川西孝泉构造上三叠统超致密储层演化特征
引用本文:吕正祥.川西孝泉构造上三叠统超致密储层演化特征[J].成都理工大学学报(自然科学版),2005,32(1):22-26.
作者姓名:吕正祥
作者单位:成都理工大学地球科学学院,成都,610059;中国石化西南分公司研究院,成都,610081
摘    要:川西坳陷孝泉构造上三叠统储层普遍为超致密储层,其中蕴藏的丰富天然气资源可能与天然气的早期聚集有关,认识超致密储层的孔隙演化史有助于确立天然气的大规模聚集时期.作者利用显微镜下观察、扫描电镜分析、阴极发光分析等认识了储层的成岩作用特征,结合自生矿物中流体包体的均一温度、同位素地质温度计和古地温梯度等建立了储层的成岩作用序列.根据储层在压实过程中的原生孔隙损失规律、成岩矿物形成时期及其对孔隙度破坏的定量化统计、次生孔隙的定量化研究等,认识了储层的致密化进程,即储层致密于早-中侏罗世,但在侏罗纪前一般具较好孔隙度.有利于天然气大规模聚集时期为自上三叠统须四段沉积到中侏罗统沙溪庙组沉积末期间.

关 键 词:川西坳陷  上三叠统  超致密储层  孔隙演化  川西  孝泉构造  上三叠统  超致密储层  演化特征  West  Sichuan  structure  reservoir  Triassic  Upper  characteristics  沙溪庙组  中侏罗统  沉积  侏罗纪  中侏罗世  致密化  定量化研究  次生孔隙  量化统计
文章编号:1671-9727(2005)01-0022-05
修稿时间:2004年7月8日

Evolutionary characteristics of Upper Triassic reservoir in Xiaoquan structure in West Sichuan, China
..,Zheng-xiang.Evolutionary characteristics of Upper Triassic reservoir in Xiaoquan structure in West Sichuan, China[J].Journal of Chengdu University of Technology: Sci & Technol Ed,2005,32(1):22-26.
Authors:,Zheng-xiang
Institution:(L(U)..) Zheng-xiang~(1,2)(1.College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China, 2.Institute of Oil and Gas Exploration and Development,Southwest Branch of SINOPEC,Chengdu 610081,China)
Abstract:The Upper Triassic reservoir in Xiaoquan structure in West Sichuan is generally a super tight reservoir, in which abundant natural gas possibly relates to early gathering. It is useful for assuring gas's extensively gathering period to know porosity evolving history of the super tight reservoir. By observing under microscope and analysing under scanning electron microprobe and cathodeluminescence, the author knows the diagenetic characteristics of the resevoir and sets up the diagenetic series combined with homogenization temperatures of inclusions, isotopes, and paleotemperature grades. Through quantitative research on the original pore loss during compaction, porosity change because of diagenesis minerals and secondary pore, the author knows the tightening process of the reservoir. The reservoir had commonly better porosity before Jurassic and was tightened between Early and Middle Jurassic. Above all, the useful period for gas gathering extensively is from the sedimentary period of the Xujiahe 4 section in Upper Triassic to that of Shaximiao Formation in Middle Jurassic.
Keywords:West Sichuan depression  Upper Triassic  super tight reservoir  porosity evolution
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