鄂尔多斯盆地延川南区块煤储层酸化改造实验研究

杨松,池圣平，秦勇，周成香

doi:10.11764/j.issn.1672-1926.2014.05.761

天然气地球科学 >

2014 , Vol. 25 >Issue 5: 761 - 766

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.05.761

非常规天然气

鄂尔多斯盆地延川南区块煤储层酸化改造实验研究

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1.华东分公司非常规资源勘探开发指挥部，山西临汾 042100；
2.中国矿业大学资源学院，江苏徐州 221116

杨松(1985-),男，河北保定人,工程师，主要从事煤层气勘探开发研究. E-mail:cumt_ys@126.com.

收稿日期: 2013-08-27

修回日期: 2013-10-29

网络出版日期: 2014-05-10

基金资助

国家科技重大专项“大型油气田及煤层气开发”(编号:2011ZX05033-003)资助.

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Experimental Study on Acidization Alteration ofCoal Reservoir in the Southern Yanchuan,Ordos Basin

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1.Non-conventional Resources Exploration and Development Department of East
China Branch Company,SINOPEC,Linfen 042100,China;
2.School of Resources and Geoscience,China University of Mining and Technology,Xuzhou 221116,China

Received date: 2013-08-27

Revised date: 2013-10-29

Online published: 2014-05-10

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摘要

运用煤层气地质学、高等煤化学、煤岩学以及油气开发地质学的理论与方法，探讨了煤储层改造的新原理。从常规储层酸化改造的角度，设计并开展了煤岩二氧化碳、土酸酸化改造模拟实验，并配以常规渗透率测试。实验结果显示，煤岩经过酸化后，渗透率得到不同程度的改善。结合压汞实验、X-衍射实验、扫描电镜实验对样品进行分析，发现经过酸化的煤岩矿物组分得到了不同程度的溶蚀，孔隙结构、渗流通道和渗透性均得到不同程度的改善，但其改造效果主要决定于原煤储层的基础孔渗特征、矿物组成及含量和酸化改造后排液的时间控制。

关键词： 煤; 储层; 孔隙; 渗透性; 酸化; 控制因素

本文引用格式

杨松,池圣平，秦勇，周成香 . 鄂尔多斯盆地延川南区块煤储层酸化改造实验研究[J]. 天然气地球科学, 2014 , 25(5) : 761 -766 . DOI: 10.11764/j.issn.1672-1926.2014.05.761

Abstract

Synthetically application of CBM geology,higher coal chemistry,coal petrology and petroleum engineering,new principle of coal reservoir stimulation was discussed.From the perspective of conventional reservoir acidification reconstruction,an experiment of acidization alteration of CO₂ and mud acid was designed and made.Based on the results of conventional permeability,mercury injection,X-ray diffraction and SEM,the effect of acid treatment for the alteration of reservoirs was positive and productive.The minerals that coal reservoir contained were dissolved.The pore structures,seepage channels and the permeability of the coal samples after acidification were improved obviously.The main factors influencing the acidification of coal samples were the basic characteristics of porosity and permeability of coal samples before treated such as the minerals component and content,and the control of drainage after acidization alteration.

Key words： Coalbed; Reservoir; Porosity; Permeability; Acidization alteration; Control factors

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