大庆石油地质与开发2011，Vol.30Issue(5)：30-35,6.DOI:10.3969/J.ISSN.1000-3754.2011.05.006
东营凹陷沙河街组不同砂体类型储层敏感性
SENSITIVITY ON DIFFERENT SANDBODY TYPES OF THE RESERVOIRS IN SHAHEJIE FORMATION OF DONGYING SAG
摘要
Abstract
On the basis of the characteristic analyses of the petrology and clay mineral combination for different types of sandbody reservoirs in Palaeogene Shahejie Formation' s No. 3 and No. 4 Members in Wangjiagang area of Dongying Sag, the potential sensitivities and their differences for these sandbodies are explored. The results show that there are a great differential in the above characteristics for different kinds of sandbodies and moreover possess much more serious influences on reservoir sensitivities. The clay mineral assemblage of the proximal sandstones such as those nearby rivers, lakeshores is mainly characterized by the mixed layer of illite and smectite, illite and kaolinite, taking the minerals of the mixed layer of illite and smectite as main form; the clay mineral combination of the sandbodies in delta front and beach bar facies include kaolinite, illite, and illite/ montmorillonite mixed layer, the content of kaolinite is rather higher; So are the contents of illite and chlorite in the sandbodies of hemi-deep lake, deep lake and tuibidite fan, they belong to the assemblage of illite, chlorite and illite/ montmorillonite mixed layer. Reservoir sensitivity is obviously influenced by the sedimentary environments and buried depth: the proximalsandstones such as ones in rivers, shore lake and so forth possess medium-slightly strong water sensitivity; the sandbodies in delta front and beach bar are characterized by medium-weak velocity sensitivity; those in the contact belt between the delta front and deeper lake have a certain acid sensitivity; the sandbody reservoirs in turbidite fan have slightly weak water sensitivity; the fine-grained facies such as flooded plain, turbidite fan fringe and so forth display rather stronger stress sensitivity. According to the spread and distribution of the sedimentary belts, the characteristics of reservoir sensitivity can be predicted and furthermore the protecting measures to the oil layers can be established.关键词
东营凹陷/古近系/砂体类型/黏土矿物/储层敏感性Key words
Dongying Sag/Palaeogene system/sandbody type/clay mineral/reservoir sensitivity分类
能源科技引用本文复制引用
张立强,李波..东营凹陷沙河街组不同砂体类型储层敏感性[J].大庆石油地质与开发,2011,30(5):30-35,6.基金项目
中央高校基本科研业务费专项资金和国家科技重大专项项目(2008ZX05008-004)资助. （2008ZX05008-004）
