矿场尺度下微波强化煤层气开采技术工艺参数优化

doi:10.3969/j.issn.1006-6535.2025.01.017

特种油气藏 ›› 2025, Vol. 32 ›› Issue (1): 144-152.DOI: 10.3969/j.issn.1006-6535.2025.01.017

矿场尺度下微波强化煤层气开采技术工艺参数优化

王希友¹, 秦杨^2,3, 刘紫微^2,4, 朱静怡², 谢诗意^2,5, 金心岫^3,6, 杜博迪^2,3, 于佳璐^2,3

1.中国石油辽河油田分公司,辽宁盘锦 124010;
2.西南石油大学油气藏地质及开发工程全国重点实验室,四川成都 610500;
3.中国石油长庆油田分公司,陕西西安 710018;
4.中国石油塔里木油田分公司,新疆库尔勒 841000;
5.中国石油西南油气田分公司,四川成都 610051
6.新南威尔士大学,澳大利亚悉尼 1466

收稿日期:2023-04-24 修回日期:2024-11-24 出版日期:2025-02-25 发布日期:2025-05-13
作者简介:王希友(1974—),男,教授级高级工程师,《特种油气藏》编委会副主任,1996年毕业于石油大学(华东)石油与天然气开采专业,2018年毕业于西南石油大学石油工程专业,获硕士学位,现从事油气生产管理工作。
基金资助:
国家科技重大专项“多层复杂煤体结构区煤储层直井压裂技术研究”(2016ZX044－004－002);西南石油大学“启航计划”基金“纳米材料辅助微波加热条件下油页岩热解规律研究”(2015QHZ006)

Optimization of process parameters for microwave-enhanced coalbed methane mining technology at mine scale

WANG Xiyou¹, QIN Yang^2,3, LIU Ziwei^2,4, ZHU Jingyi², XIE Shiyi^2,5, JIN Xinxiu^3,6, DU Bodi^2,3, YU Jialu^2,3

1. PetroChina Liaohe Oilfield Company, Panjin, Liaoning 124010, China;
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. PetroChina Changqing Oilfield Company, Xi′an, Shaanxi 710018, China;
4. PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000, China;
5. PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610051, China;
6. The University of New South Wales, Sydney 1466, Australia

Received:2023-04-24 Revised:2024-11-24 Online:2025-02-25 Published:2025-05-13

摘要/Abstract

摘要： 提高煤层气采收率是实现煤层气大规模有效开发的重要需求。现有研究表明,在岩心尺度下,微波具有提高煤层气采收率的可行性,但在矿场尺度下的相关研究却较为缺乏。为此,建立矿场尺度下的微波加热井模型,对煤层内电磁场、温度场及力学场进行耦合,探讨微波加热参数的影响因素,并对工艺参数进行了优化,确保微波加热井的有效性和稳定性。研究表明:微波加热井以铜波导管(BJ22或BJ26型)及陶瓷套管材料组成的直井或水平井为主;煤层和井筒的温度和热应力与微波功率和加热时间成正相关关系,近井地带煤层由自身介电损耗产生热量,远井地带煤层主要靠接触传热升温;500 W-100 W交替加热33 d的微波工作模式改善了煤层的有效开采性和工作稳定性;仅靠优化工艺参数不能满足实际应用需求,应综合使用间歇式循环变功率微波加热模式、吸波介质强化煤层导热技术、水力压裂等技术提高微波加热储层的实际效果。该研究成果可为微波强化煤层气开采技术的推广应用提供技术支撑。

关键词: 煤岩, 煤层气, 微波加热, 热应力, 有限元软件

Abstract: Enhancing the recovery rate of coalbed methane is an essential requirement for achieving large-scale and effective development of coalbed methane. Existing studies have shown that microwaves have the feasibility of improving coalbed methane recovery rate at the core scale, but relevant studies at the mine scale are relatively scarce. For this reason, a microwave heating well model at the mine scale is established to couple the electromagnetic field, temperature field and mechanical field within the coalbed, to explore the influencing factors of microwave heating parameters, and to optimize the process parameters, thereby ensuring the effectiveness and stability of microwave heating wells. The study shows that: Microwave heating wells are mainly vertical or horizontal wells, which are made of copper waveguides (BJ 22 or BJ 26 type) and ceramic casing materials, the temperature and thermal stress in the coalbed and wellbore are positively correlated with microwave power and heating time. The coalbed in the vicinity of the well generates heat by its own dielectric loss, while the coalbed in the area far from the well mainly relies on contact heat transfer to increase temperature. A microwave operating mode of 500 W to 100 W over 33 days has improved the effectiveness and operational stability of the coalbed. Optimizing process parameters alone cannot meet practical application requirements; therefore, a combination of intermittent cyclic variable power microwave heating patterns, microwave-absorbing medium enhanced coalbed thermal conduction technology, and hydraulic fracturing techniques should be employed to enhance the practical effects of microwave heating of the reservoir. The study results can provide technical support for the promotion and application of microwave-enhanced coalbed methane mining technology.

Key words: coal rock, coalbed methane, microwave heating, thermal stress, finite element software

中图分类号:

TE357

王希友, 秦杨, 刘紫微, 朱静怡, 谢诗意, 金心岫, 杜博迪, 于佳璐. 矿场尺度下微波强化煤层气开采技术工艺参数优化[J]. 特种油气藏, 2025, 32(1): 144-152.

WANG Xiyou, QIN Yang, LIU Ziwei, ZHU Jingyi, XIE Shiyi, JIN Xinxiu, DU Bodi, YU Jialu. Optimization of process parameters for microwave-enhanced coalbed methane mining technology at mine scale[J]. Special Oil & Gas Reservoirs, 2025, 32(1): 144-152.

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矿场尺度下微波强化煤层气开采技术工艺参数优化

Optimization of process parameters for microwave-enhanced coalbed methane mining technology at mine scale

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