基于微地震裂缝监测技术的煤层气压裂效果评价——以贵州六盘水地区DC1井组为例
Evaluation of Coalbed Methane Fracturing Effectiveness Based on Microseismic Fracture Monitoring Technology:A Case Study of DC1 Well Group in Liupanshui District,Guizhou Province
杨永宇 1赵恒仪 1吴章利1
作者信息
- 1. 自然资源部复杂构造区非常规天然气评价与开发重点实验室,贵州 贵阳 550081;贵州省油气勘查开发工程研究院,贵州 贵阳 550081
- 折叠
摘要
贵州作为煤层气资源大省,其煤储层具有复杂特性,需采用水力压裂等技术进行改造.微地震监测技术能有效评估水力压裂效果,为优化设计和决策提供依据.采用微地震裂缝监测技术对六盘水地区 3 口煤层气井的压裂施工进行微地震裂缝监测,获取了压裂缝网展布范围、延伸方向等几何参数.结果显示,压裂裂缝总体延伸方向为 130°左右,与最大主应力方向基本一致,裂缝长度为 200～280 m,总体延伸长度较好.通过对压裂效果进行评价,分析了天然裂缝对压裂缝网发育的影响,为压裂施工调整、压后效果评估提供了有效指导,获得了较好效果,为本工区后期压裂工艺改进提供了有效参考.
Abstract
As a major province with rich coalbed methane resources,Guizhou has coal reservoirs with complex characteristics,requiring technological transformations such as hydraulic fracturing.Microseismic monitoring technology can effectively evaluate the effect of hydraulic fracturing,providing a basis for optimized design and decision-making.By applying microseismic fracture monitoring technology to monitor the fracturing operations of three coalbed methane wells in Liupanshui District,geometric parameters such as the distribution range and extension direction of the fracture network were obtained.The results showed that the overall extension direction of the fracturing fractures was approximately 130°,which was basically consistent with the direction of the maximum principal stress.The fracture length ranged from 200 m to 280 m,indicating a generally good overall extension length.Through the evaluation of the fracturing effect,the impact of natural fractures on the development of the fracture network was analyzed,providing effective guidance for the adjustment of fracturing operations and the evaluation of post-fracturing effects.This approach achieved good results and provided an effective reference for the improvement of fracturing processes in later stages of the work area.
关键词
煤层气/水力压裂/微地震裂缝监测/压裂效果评价Key words
coalbed methane/hydrofracturing/microseismic fracture monitoring/fracturing effect evaluation引用本文复制引用
基金项目
贵州省地质勘查基金项目(52000021MGQSE7S7K6PRP)
出版年
2024
NETL
NSTL
万方数据