天然气地质学

鄂尔多斯盆地富县探区长6油层组成岩作用及其对物性的影响

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  • 中国石油勘探开发研究院西北分院,甘肃 兰州 730020

收稿日期: 2007-01-18

  修回日期: 2007-04-24

  网络出版日期: 2008-06-20

DIAGENESIS OF THE CHANG 6 MEMBER, UPPER TRIASSIC,FUXIAN AREA OF ORDOS BASIN

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  • Northwest Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Lanzhou 730020, China

Received date: 2007-01-18

  Revised date: 2007-04-24

  Online published: 2008-06-20

摘要

为了认清鄂尔多斯盆地富县探区三叠系延长组长6段有利储层的分布规律, 通过大量的岩石薄片和铸体薄片的镜下鉴定,并结合扫描电镜、阴极发光、X-衍射等测试结果,研究了该区长6油层组主要成岩作用及其对物性的影响,指出主要成岩作用类型有压实作用、胶结作用和溶蚀作用;由于压实作用损失的孔隙度为18.78%,由胶结作用损失的孔隙度为9.16%,由于沥青充填损失的孔隙度为5.12%,而各种溶蚀作用却使孔隙度增加了5.12%,造成现今平均孔隙度为9.49%。

本文引用格式

苟迎春;李建齐;郑红军;彭 军. . 鄂尔多斯盆地富县探区长6油层组成岩作用及其对物性的影响[J]. 天然气地球科学, 2007 , 18(3) : 360 -364 . DOI: 10.11764/j.issn.1672-1926.2007.03.360

Abstract

The paper is aimed at making clear the distribution of the favorable reservoirs in the area. Based on core description, cast section, popular section, scanning election microscope, x-ray diffraction etc, it is believed that the main diagenesis types are pressure solution, cementation and dissolution. The primary porosity of the reservoir rocks is 37.17%, which is reduced by 18.78% by compaction and pressure solution and 9.16% by cementation, and 5.12% by asphalt-filling. The secondary pores are produced by organic acids' dissolving organic matter at maturing stages, resulting in an increase of porosity by 5.38%. The preserved average porosity is 9.49% at present.

参考文献

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