刘广林;马爽;邵晓州;周新平;郭正权;王亚玲;

• 1:低渗透油气田勘探开发国家工程实验室

• 2:中国石油长庆油田分公司勘探开发研究院

• 3:中国石油长庆油田分公司第一采油厂

摘要(Abstract)：

鄂尔多斯盆地天环坳陷北段与姬塬地区同属西北沉积体系,且比姬塬地区更靠近物源区,但是该区长8储层物性较姬塬地区的差。利用薄片观察、粒度和地层水分析、成像测井等资料,分析天环坳陷北段与姬塬地区长8储层成岩环境的差异性。结果表明:自晚侏罗系以来,天环北段处于天环坳陷最低部位,压实作用强烈;研究区临近构造活动带,裂缝发育,目的层流体封闭性差,在构造应力的作用下,砂岩和泥岩流体交换作用强,成岩反应消耗的离子不断得到补充,导致铁方解石、高岭石胶结严重;强烈的压实和胶结作用是导致储层致密的主要原因。该研究结果对鄂尔多斯盆地石油勘探开发具有参考意义。

关键词(KeyWords)：天环坳陷北段;长8储层;储层致密;压实作用;胶结作用;鄂尔多斯盆地

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2011ZX05044,2011ZX05001-004)

作者(Author):刘广林;马爽;邵晓州;周新平;郭正权;王亚玲;

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