页岩气环保变黏压裂液的研究与应用

doi:10.3969/j.issn.1006-6535.2023.02.021

特种油气藏 ›› 2023, Vol. 30 ›› Issue (2): 147-152.DOI: 10.3969/j.issn.1006-6535.2023.02.021

页岩气环保变黏压裂液的研究与应用

范宇恒¹, 周丰², 蒋廷学³, 张士诚⁴, 白森⁵, 张晓锋², 杨泉⁵, 余维初^1,6

1.长江大学化学与环境工程学院,湖北荆州 434023;
2.中国石油长城钻探工程有限公司,北京 100101;
3.中国石化石油工程技术研究院有限公司,北京 102206;
4.中国石油大学(北京),北京 102249;
5.中国石油长城钻探工程有限公司四川页岩气项目部,四川成都 610000;
6.油气田清洁生产与污染物控制湖北省工程研究中心,湖北荆州 434023

收稿日期:2022-09-27 修回日期:2022-12-11 出版日期:2023-04-25 发布日期:2023-05-29
通讯作者: 余维初(1965—),男,教授,博士生导师,1999年毕业于江汉石油学院环境工程专业,2006年毕业于中国石油大学(北京)油气井工程专业,获博士学位,现从事非常规油气压裂与油气田开发方面的教学与研究工作。
作者简介:范宇恒(1995—),男,2016年毕业于长江大学化学专业,现为该校油气田应用化学专业在读博士研究生,从事压裂液研究与实验工作。
基金资助:
国家自然科学基金“基于碳点荧光标记码监测水平井压裂液剖面的应用基础研究”(52274029)

Research and Application of Environmentally Friendly Variable-viscosity Fracturing Fluid for Shale Gas

Fan Yuheng¹, Zhou Feng², Jiang Tingxue³, Zhang Shicheng⁴, Bai Sen⁵, Zhang Xiaofeng², Yang Quan⁵, Yu Weichu^1,6

1. College of Chemistry & Environmental Engineering, Yangtze University, Jingzhou, Hubei 434023, China;
2. CNPC Greatwall Drilling Co., Ltd., Beijing 100101, China;
3. Sinopec Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206, China;
4. China University of Petroleum (Beijing), Beijing 102249, China;
5. Sichuan Shale Gas Project Department, CNPC Greatwall Drilling Co., Ltd., Chengdu, Sichuan 610000, China;
6. Hubei Engineering Research Center for Clean Production and Pollutant Control in Oil and Gas Fields, Jingzhou, Hubei 434023, China

Received:2022-09-27 Revised:2022-12-11 Online:2023-04-25 Published:2023-05-29

摘要/Abstract

摘要： 为解决深层页岩气开发中常规压裂液储层伤害大、携砂能力差、变黏工序复杂等技术难题,结合威远区块深层页岩储层特点及施工需求,研发了一种环保变黏压裂液体系,并进行了室内性能评价与现场应用。研究表明:该环保压裂液体系可以在30 s内完全溶解,压裂液可在黏度为2～150 mPa·s范围内实时调整;使用返排水配制的低黏压裂液与高黏压裂液减阻率均大于70%,线性胶压裂液减阻率大于65%;低黏压裂液与高黏压裂液储层损害率均小于15.00%,线性胶压裂液岩心损害率为15.47%;环保变黏压裂液生物毒性均为无毒;环保变黏压裂液携砂性能良好,较清水携砂性能最大提高65倍。在威远H21-5井的应用表明,环保变黏压裂液溶解速度快、减阻性能优异、携砂性能优良,可实时改变黏度以满足不同压裂工况,满足减阻携砂一体化压裂施工的技术需求,具有较好应用前景。

关键词: 页岩气, 深层, 变黏压裂液, 环保, 减阻, 携砂

Abstract: In order to solve the technical problems in deep shale gas development, such as great reservoir damage, poor proppant carrying and complicated variable-viscosity process of conventional fracturing fluid, an environmentally friendly variable-viscosity fracturing fluid system was developed, and laboratory performance evaluation and field application were carried out, taking into account the characteristics and construction requirements of deep shale reservoirs in Weiyuan Block. The study shows that the environmentally friendly fracturing fluid system was completely dissolved within 30 seconds, and the fracturing fluid viscosity was adjusted in real time within the range of 2 to 150 mPa·s. The drag reduction rate of low/high viscosity fracturing fluid prepared with flowback water was more than 70%, and the drag reduction rate of linear-gel fracturing fluid wais more than 65%. The reservoir damage rate of low/high viscosity fracturing fluid was less than 15.00%, and the core damage rate of linear-gel fracturing fluid was 15.47%. The environmentally friendly variable-viscosity fracturing fluid was biologically non-toxic and high in proppant-carrying performance, which was up to 65 times higher than that of clean water. The application in Weiyuan Well H21-5 in Weiyuan indicates that the environment-friendly variable-viscosity fracturing fluid actualized fast dissolution speed, excellent drag reduction performance and outstanding proppant-carrying performance, and it could changed the viscosity in real time to adapt to different fracturing conditions and satisfy the technical requirements of fracturing integrated with drag reduction and proppant carrying, with good application prospect.

Key words: shale gas, deep, variable-viscosity fracturing fluid, environmentally friendly, drag reduction, proppant carrying

中图分类号:

TE37

范宇恒, 周丰, 蒋廷学, 张士诚, 白森, 张晓锋, 杨泉, 余维初. 页岩气环保变黏压裂液的研究与应用[J]. 特种油气藏, 2023, 30(2): 147-152.

Fan Yuheng, Zhou Feng, Jiang Tingxue, Zhang Shicheng, Bai Sen, Zhang Xiaofeng, Yang Quan, Yu Weichu. Research and Application of Environmentally Friendly Variable-viscosity Fracturing Fluid for Shale Gas[J]. Special Oil & Gas Reservoirs, 2023, 30(2): 147-152.

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页岩气环保变黏压裂液的研究与应用

Research and Application of Environmentally Friendly Variable-viscosity Fracturing Fluid for Shale Gas

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