Difference of Micro-Pore Throat Characteristics in Extra-Low Permeability Sandstone of Different Pore Throat Matching Relationship
详细信息
- 责任者：Gao Hui (College of Petroleum Engineering ; Xi’an Petroleum University ; Xi’an 710065 ; China) ; Jing Xiaofeng
- 刊名：Petroleum Geology & Experiment
- 出版年：2013
- 卷期：35(4)
- 关键词：砂岩储集层 ; sandstone reservoirs ; 低渗透储集层 ; low permeability reservoirs ; 鄂尔多斯盆地 ; Ordos Basin ; 新疆 ; Xinjiang
- 页码：p.401-406,413
- 图表：illus., 4 tables, 30 refs.
- 分类号：1003
- issnNo：ISSN1001-6112
- isbnNo：CN32-1151/TE
摘要
There are different pore throat matching relationship and micro-pore throat characteristics for similar or equal sandstones because of different deposition and diagenesis reconstruction.Taking the Chang6 sandstone of Yanchang Formation in Wuqi area and the X2 sandstone of Xishanyao Formation in Niujuanhu area as the objects,the micro-pore throat characteristics in different pore throat matching relationships are evaluated quantitatively using physical property testing,cast section and constant rate mercury penetration technique.The results show that there are no obvious differences in pore parameters,and the differences of micro-pore throat characteristics are mainly presented in throat parameters for samples with different permeabilities.As to the X2 sandstone,the generation of dissolution pores and intercrystal pores leads to high content of curved lamellar and tube bundle throat,small throat radius and narrow distribution,concentrated contribution of throat to permeability,fine average throat radius and main flow throat radius,high content of big pore throat ratio in Niujuanhu area.In the Chang6 sandstone,necking,flaky and curved lamellar throats develop,throat radius vary obviously,and big throats are in high content,which can be explained by the generation of primary intercrystal pores.Different steps should be taken in the development process for extra-low permeability sandstone reservoirs which present different pore throat matching relationships.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |