成都理工大学学报（自然科学版）2012，Vol.39Issue(2)：122-129,8.
西湖凹陷某构造花港组致密砂岩储层成岩作用与孔隙演化
Diagenesis and pore evolution of Huagang Formation tight sandstone reservoirs in a structure of Xihu depression in East China Sea Basin
摘要
Abstract
Through observing the cores of 3 wells in a structure of the Xihu depression in East China Sea Basin and identifying rock slices, scanning electron microscopy and testing reservoir physical property, people can recognize and restore the reservoir diagenesis and tne pore evolution process. The results of the study show that the Oligocene Huagang Formation compacted sandstone has mainly undergone the compaction, cementation, dissolution and many kinds of diagenesis. At present, it comes to from B period of the middle diagenesis stage to the late diagenesis stage. The reservoir pores mainly include two types, that is, intergranular pore and feldspar solution pore. Compaction and the carbonate and kaolinite cementation arc the main factors that lead to reservoir densification., and the porosity loss reaches 30% -35%. Chlorite with a ring edge and silicon cementation occupy the pore porosity, at the same time they have a certain protective effect for the pores. Atmospheric fresh water,acid water in coal iormation and organic acid that cause the erosion of leldspar particles and carbonate cements are the main factors to which from the secondary pores. The porosity increases about 5%, obviously improving tne tight sandstone reservoir property.关键词
西湖凹陷/致密砂岩储层/成岩作用/孔隙演化Key words
Xihu depression/ tight sandstone reservoir/ diagenesis/ porosity evolution分类
能源科技引用本文复制引用
张武,徐发,徐国盛,高伟中,唐健程..西湖凹陷某构造花港组致密砂岩储层成岩作用与孔隙演化[J].成都理工大学学报（自然科学版）,2012,39(2):122-129,8.基金项目
国家科技重大专项(2011ZX05023-001) （2011ZX05023-001）
