| 贵州正安地区常压页岩气压裂关键技术 |
| 投稿时间：2022-06-09 修订日期：2022-07-28 点此下载全文 |
| 引用本文：李龙,陈显举,彭安钰,等.贵州正安地区常压页岩气压裂关键技术[J].钻探工程,2022,49(5):189-193.LI Long,CHEN Xianju,PENG Anyu,et al. Key technologies for hydraulic fracturing of normal pressure shale gas in the Zheng’an area of Guizhou[J]. Drilling Engineering, 2022,49(5):189-193. |
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| 基金项目:贵州省科技重大专项“贵州省页岩气效益开发关键技术及工程试验”（编号：黔科合战略找矿［2022］ZD005）；贵州页岩气勘探开发有限责任公司项目“黔北常压页岩气储量参数优化研究” |
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| 中文摘要:贵州正安地区页岩气储层具有常压、优质页岩储层较薄、水平主应力差异大等特点，导致压裂形成复杂缝网的难度较高，进而制约了正安地区页岩气产量的提高。针对这一难点，通过对正安地区常压页岩气水平井压裂技术实践和分析，结合该地区五峰—龙马溪组页岩气储层地质特征，借鉴我国南方页岩气先进的压裂技术，形成了以水平井段内多簇密切割压裂、水平井精细化压裂设计、减阻可变粘度压裂液体系、投球暂堵转向、返排液重复利用等技术为主的压裂技术体系，并取得了良好的改造和生产效果，为正安地区页岩气的有效开发提供了强有力支撑。 |
| 中文关键词:常压页岩气 压裂技术 多簇密切割压裂 精细化压裂 减阻可变粘度压裂液 投球暂堵转向 正安地区 |
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| Key technologies for hydraulic fracturing of normal pressure shale gas in the Zheng’an area of Guizhou |
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| Abstract:The shale gas reservoir in the Zheng’an area is characterized with normal pressure， thin high-quality shale gas interval and large difference in horizontal principal stresses， leading to difficulties in forming complex fracture network， and in turn， restricting the increase of shale gas production. In view of the difficulties， the fracturing technology system， which mainly composes of multiple clusters of close cutting fracturing in horizontal well sections， fine fracturing design of horizontal wells， variable viscosity fracturing fluid systems with frictional pressure reduction， temporary plugging diversion and flowback fluid reuse， has been formed through the analysis of normal pressure shale gas horizontal well fracturing technology and application in the Zheng’an area in the context of the geological characteristics of the Wufeng-Longmaxi shale gas formation in the area， and referring to the advanced fracturing technology of shale gas in southern China. The technology has achieved good reservoir stimulation and production effect， which provides a strong support for the effective development of shale gas in the Zheng’an area. |
| keywords:normal pressure shale gas fracturing technology multiple clusters of close cutting fracturing fine fracturing variable viscosity fracturing fluid temporary plugging and diverting Zheng’an area |
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