煤系储层综合开发中的压裂射孔方案优化研究

张红杰; 刘欣佳; 张潇; 张遂安; 邵冰冰

doi:10.3969/j.issn.1006-6535.2021.01.023

特种油气藏 >

2021 , Vol. 28 >Issue 1: 154 - 160

DOI: https://doi.org/10.3969/j.issn.1006-6535.2021.01.023

钻采工程

煤系储层综合开发中的压裂射孔方案优化研究

张红杰 ,
刘欣佳 ,
张潇 ,
张遂安 ,
邵冰冰

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1.中联煤层气有限责任公司,北京 100015;
2.中国石油大学北京,北京 102249

张红杰(1981—),男,高级工程师,2004年毕业于中国石油大学(华东)石油工程专业,现从事非常规油气钻完井技术研究工作。

收稿日期: 2020-03-04

修回日期: 2020-10-28

网络出版日期: 2021-04-27

基金资助

国家科技重大专项“临兴-神府地区煤系地层煤层气、致密气、页岩气合采示范工程”(2016ZX05066);山西省重大科技专项“深部煤层气增产改造及储层保护技术”(20181101013)

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Study on the Optimization of the Fracturing Perforation Scheme in the Comprehensive Development of Coal-bearing Reservoirs

Zhang Hongjie ,
Liu Xinjia ,
Zhang Xiao ,
Zhang Suian ,
Shao Bingbing

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1. CNGIA Coalbed Methane Co.,Ltd.,Beijing 100015,China;
2. China University of Petroleum (Beijing,Beijing 102249,China

Received date: 2020-03-04

Revised date: 2020-10-28

Online published: 2021-04-27

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摘要

针对鄂尔多斯盆地东缘临兴-神府区块3种典型的煤系储层岩性组合赋存模式,利用数值模拟方法,分析射孔位置与射孔打开程度对裂缝在层间、层内扩展延伸能力的影响,以裂缝穿层扩展能力和裂缝延伸长度为评价指标,研究了砂岩-煤层接触、砂岩-煤层-泥岩互层和煤层-砂岩-煤层多煤层3种模式下的多储层合层压裂射孔方案,提高煤系储层油气资源综合利用效率。结果表明:层间界面对能量的传播产生明显的负效应;煤层-砂岩-煤层多煤层与砂岩-煤层-泥岩互层式储层的射孔比例以50%～80%为宜;砂岩-煤层接触模式储层适宜采用间接压裂工艺,射孔方案为砂岩的70%～75%+煤层的25%～50%。该研究可为煤系多储层合层压裂射孔优化提供参考。

关键词： 煤系储层; 岩性组合; 压裂; 射孔; 临兴-神府区块; 鄂尔多斯盆地

本文引用格式

张红杰 , 刘欣佳 , 张潇 , 张遂安 , 邵冰冰 . 煤系储层综合开发中的压裂射孔方案优化研究[J]. 特种油气藏, 2021 , 28(1) : 154 -160 . DOI: 10.3969/j.issn.1006-6535.2021.01.023

Abstract

For the three typical lithological association occurrence patterns of coal-bearing reservoirs in the Linxing-Shenfu Block on the eastern edge of Ordos Basin,the numerical simulation method is applied to analyze the influence of perforation location and perforation degree on the inter-bed and intra-bed fracture propagation and extension,and the fracture bed-crossing propagation capability and fracture extension length are used as evaluation indexes to study the multi-reservoir fracturing perforation scheme for such three modes as the sandstone-coalseam contact zone,the sandstone-coalseam-mudstone interbed,and the coalseam-sandstone-coalseam multiple coalseams,so as to improve the comprehensive utilization efficiency of oil and gas resources in coal reservoirs.The results show that:the interbed interface has a significant negative effect on energy propagation; the perforation ratio of 50%-80% is appropriate for the coalseam-sandstone-coalseam multiple coalseams and the sandstone-coalseam-mudstone interbed type reservoirs; for the sandstone-coalseam contact type reservoirs,the indirect fracturing process is applicable,and the perforation ratio is 70%-75% for the sandstone and 25%-50% for the coalseam.This study can provide a reference for the optimization of the coal-bearing multi-reservoir fracturing perforation.

Key words： coal-bearing reservoir; lithological association; fracturing; perforation; Linxing-Shenfu Block; Ordos Basin

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