地质通报2016，Vol.35Issue(2)：415-423,9.
鄂尔多斯盆地姬源-陇东地区三叠系延长组长7段致密储层成岩作用
A study of tight reservoir diagenesis in the Chang 7 Member of Triassic ;Yanchang Formation, Jiyuan-Longdong area, Ordos Basin
摘要
Abstract
Chang 7 Member is a tight reservoir in Triassic Yanchang Formation, Jiyuan-Longdong area, Ordos Basin. The tight reser⁃voir is formed mainly in the deep lake sub-facies, and partly in the delta front sub-facies. The study of tight reservoir diagenesis has been very insufficient, and it is important to find out the effect of diagenesis on the development of reservoir pore. The samples col⁃lected from the core were observed and analyzed by casting lamella and scan electron microscope to reveal the influence of the main diagenetic activities such as compaction, cementation and dissolution on the pore type and pore size of the tight reservoir in the study area. Compaction is the main factor responsible for the formation of tight reservoir. The sand body in the bay of delta front distribu⁃tary and the edge of turbidite fan is especially easier to form calcite cementation when the pore water is excluded from the mudstone under pressure. Illite cementation and calcite cementation makes the reservoir more dense. A small amount of chlorite films cementa⁃tions form the residual intergranular pores and promote the mineral dissolution. Dissolution is the main function causing the reservoir pore formation in the study area. The diagenesis study constitutes the basis for the research on reservoir physical properties in the study area.关键词
鄂尔多斯盆地/三叠系延长组/致密储层/成岩作用Key words
Ordos Basin/Triassic Yanchang Formation/tight reservoir/diagenesis分类
天文与地球科学引用本文复制引用
宋平,李文厚,卢进才,顾端阳,秦彩虹,李兆雨..鄂尔多斯盆地姬源-陇东地区三叠系延长组长7段致密储层成岩作用[J].地质通报,2016,35(2):415-423,9.基金项目
国家自然科学基金项目（批准号41330315）和中国地质调查局项目 （）
