重复脉冲强冲击波技术在煤储层改造中的初步应用

doi:10.3969/j.issn.1672-7703.2019.03.013

中国石油勘探 ›› 2019, Vol. 24 ›› Issue (3): 397-402.DOI: 10.3969/j.issn.1672-7703.2019.03.013

• 工程技术 • 上一篇

重复脉冲强冲击波技术在煤储层改造中的初步应用

郭智栋¹, 曾雯婷², 方惠军¹, 葛腾泽², 韩军², 蔺景德¹

1 中石油煤层气有限责任公司工程技术研究院;
2 中石油煤层气有限责任公司

收稿日期:2018-01-16 修回日期:2019-02-20 出版日期:2019-05-15 发布日期:2019-05-14
基金资助:
国家科技重大专项“大型油气田及煤层气开发”（2016ZX05065）；中国石油天然气股份有限公司重大科技专项“煤层气勘探开发关键技术研究与应用”（2017E-14）。

Initial application of intense repeated pulse wave for stimulating CBM reservoirs

Guo Zhidong¹, Zeng Wenting², Fang Huijun¹, Ge Tengze², Han Jun², Lin Jingde¹

1 Engineering Technology Research Institute, PetroChina Coalbed Methane Co., Ltd.;
2 PetroChina Coalbed Methane Co., Ltd.

Received:2018-01-16 Revised:2019-02-20 Online:2019-05-15 Published:2019-05-14
Supported by:

摘要/Abstract

摘要： 煤层气开发主要通过水力压裂改造储层，但该技术沟通煤岩原生裂缝系统的能力有限，导致煤层气直井产能普遍偏低。重复脉冲强冲击波技术是将高能量短脉冲施加于液体—固体界面，由于固体介质表面比液体更容易发生击穿，从而可实现对岩石的破坏和碎裂，如何利用该技术疏通煤岩缝网系统是值得关注的问题。将重复脉冲强冲击波应用于煤储层改造，结合试井解释方法进行效果评价，研究其在增加煤岩基质渗透性、沟通煤岩裂缝系统及辅助压裂增产效果方面的作用。现场试验表明，重复脉冲强冲击波作业对增加煤岩渗透性、沟通压裂裂缝具有积极作用，可为煤储层改造技术改进提供新思路。

关键词: 煤层气, 冲击波, 压裂, 试井, 渗透性

Abstract: CBM (coalbed methane) reservoirs are usually developed by hydraulic fracturing stimulation. However, it is less effective to improve the natural fracture system in coalbeds and results in lower production of vertical CBM wells. By applying intense repeated short pulses to the liquid-solid interface, coal rock can be broken and fractured due to the fact that solid is more prone to break than liquid. It is worthy to focus on how intense repeated pulsed wave can improve the natural fracture network in coalbeds. In this study, intense repeated pulse wave was applied to stimulate CBM reservoirs, and the results were evaluated by considering well test interpretation on the improvement of matrix permeability, fracture system and fracturing stimulation. Field tests show that intense repeated pulse wave plays an active role in increasing coal rock permeability and improving induced fractures. It is an effective method for stimulating CBM reservoirs.

Key words: coalbed methane, pulse wave, fracturing, well test, permeability

中图分类号:

郭智栋, 曾雯婷, 方惠军, 葛腾泽, 韩军, 蔺景德. 重复脉冲强冲击波技术在煤储层改造中的初步应用[J]. 中国石油勘探, 2019, 24(3): 397-402.

Guo Zhidong, Zeng Wenting, Fang Huijun, Ge Tengze, Han Jun, Lin Jingde. Initial application of intense repeated pulse wave for stimulating CBM reservoirs[J]. China Petroleum Exploration, 2019, 24(3): 397-402.

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重复脉冲强冲击波技术在煤储层改造中的初步应用

Initial application of intense repeated pulse wave for stimulating CBM reservoirs

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