鄂尔多斯盆地神木地区上古生界主力气层碎屑岩储层特征

南珺祥,刘博卿

doi:10.11764/j.issn.1672-1926.2013.01.54

天然气地球科学 >

2013 , Vol. 24 >Issue 1: 54 - 61

DOI: https://doi.org/10.11764/j.issn.1672-1926.2013.01.54

天然气地质学

鄂尔多斯盆地神木地区上古生界主力气层碎屑岩储层特征

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1.低渗透油气田勘探开发国家工程实验室，陕西西安 710018； 2.中国石油长庆油田分公司勘探开发研究院，陕西西安 710018； 3.中国地质大学能源学院，北京 100083

南珺祥(1965-)，男，甘肃会宁人，高级工程师，博士，主要从事鄂尔多斯盆地古生界—中生界岩矿及储层地质研究. E-mail:njx_cq@petrochina.com.cn.

收稿日期: 2012-09-28

修回日期: 2012-12-05

网络出版日期: 2013-02-10

基金资助

国家重大专项(编号:2011ZX05044)资助.

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Characteristics of Upper Paleozoic Main Clastic Reservoir of Shenmu Area in Ordos Basin

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1.National Engineering Laboratory for Exploration and Development of Low-permeability Oil and Gas Fields, Xi′an 710018, China; 2.Research Institute of Exploration and Development, Changqing Oil Field Company, Xi′an 710018, China; 3.School of Energy Resources,China University of Geoscience,Beijing 100083, China

Received date: 2012-09-28

Revised date: 2012-12-05

Online published: 2013-02-10

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摘要

应用偏光显微镜、环境扫描电镜、恒压压汞以及近年来发展起来的恒速压汞技术对鄂尔多斯盆地神木地区上古生界太原组和下石盒子组天然气储集层进行了研究。研究区该储层岩性以粗粒、巨—粗粒岩屑石英砂岩为主，石英砂岩、岩屑砂岩为次，由于成岩作用强烈，残余原生粒间孔基本全部丧失，而煤系地层提供的大量有机酸以及丰富的可溶性组分，使太原组形成了以溶孔为主的储集层，下石盒子组则主要以高岭石晶间微孔为主。恒速压汞的测试表明，太原组、下石盒子组储集层孔隙结构差别明显，太原组储集层孔径大、孔喉比大，而下石盒子组孔径小，孔喉比接近于1∶1，属于较差的孔喉配置。


关键词： 鄂尔多斯盆地; 上古生界; 储集层; 溶蚀孔; 恒速压汞; 沉积作用; 成岩作用

本文引用格式

南珺祥,刘博卿 . 鄂尔多斯盆地神木地区上古生界主力气层碎屑岩储层特征[J]. 天然气地球科学, 2013 , 24(1) : 54 -61 . DOI: 10.11764/j.issn.1672-1926.2013.01.54

Abstract

By means of microscope,ESEM,constant-pressure mercury penetration and constant-speed mercury penetration，the physical property of Taiyuan and Lower Shihezi Formation reservoirs in the Shenmu area of Ordos basin is studied in this paper.The lithology of reservoirs is mainly composed of coarse and huge-coarse quartz sandstone and debris sandstone,and secondarily of grain quartz sandstone and boulder-coarse debris quartz sandstone.Owing to the intense diagenesis，most residual origin porosity had been lost.The abundant organic acid and resoluble component from coal measure improve the physical property of Taiyuan Formation reservoir.But,the Shihezi Formation reservoir is characterized by kaolinite intercrystalline micropore.The results of constant-speed mercury penetration show that the pore structure of Taiyuan and Shihezi reservoir has great differences.Compared with the Lower Shihezi Formation，Taiyuan Formation reservoir has larger bore diameter and higher ratio of pore throat,building up a favorable pore throat pattern.

Key words： Ordos basin; Upper Paleozoic; Reservoir; Dissolved pore; Constant-speed mercury penetration; Sedimentation; Diagenesis

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