油气地质

绿泥石膜对储层孔隙度的影响———以鄂尔多斯盆地M油田延长组2段为例

  • 陶碧娥 ,
  • 傅恒
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  • 1.中国地质大学(武汉)资源学院; 2.中国石油辽河油田海南油气勘探分公司
李弘,1985 年生,男,在读硕士研究生,主要从事成岩作用方面的研究。地址:(430074)中国地质大学(武汉)资源学院石油系。 E-mail:lihong_cug@126.com

网络出版日期: 2008-12-15

Influence of chlorite film on reservoir porosity:A case study from the second member of Yanchang Formation in Ordos Basin

  • TAO Bie ,
  • FU Heng
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  • 1. The Faculty of Resources, China University of Geosciences, Wuhan 430074, China; 2. Hainan Oil & Gas Exploration Branch Company, Liaohe Oilfield Company, PetroChina, Panjin 124010, China

Online published: 2008-12-15

摘要

绿泥石膜在鄂尔多斯盆地M 油田三叠系延长组2 段储集砂岩中多有出现。结合M 油田区域地质资料及延长组2 段储层岩心薄片研究得出:绿泥石膜形成于早成岩时期,该层段孔隙度随着绿泥石膜含量的增加而增大,对该地区储层孔隙度具有建设性作用。这种作用主要体现在抑制石英次生加大、增加颗粒间抗压实强度、抑制压溶以及挤占碳酸盐岩胶结物生长空间3 个方面。

本文引用格式

陶碧娥 , 傅恒 . 绿泥石膜对储层孔隙度的影响———以鄂尔多斯盆地M油田延长组2段为例[J]. 岩性油气藏, 2008 , 20(4) : 71 -74 . DOI: 10.3969/j.issn.1673-8926.2008.04.013

Abstract

Chlorite film developed well in the reservoir sandstone in the second member of Triassic Yanchang Formation in Ordos Basin. According to the regional geologic information and core slice observation, it is concluded that chlorite film formed in the early diagenetic stage, and the porosity increased with the increasing of chlorite film content. So chlorite film takes a constructive diagenesis on the reservoir porosity in this area. This effect is manifested mainly in three aspects: repressing the quartz overgrowth, enhancing the mechanical strength of rocks and resistance to compaction, and repressing the pressure solution by occupying the space of carbonate cement.

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