摘要
为了分析高压电脉冲技术在煤层气低产井改造的适应性,对沁水盆地南部3种类型低产井实施电脉冲增产技术改造。结果表明高压电脉冲技术对储层伤害低产井改造效果最好,压裂效果差低产井次之,递减形成低产井效果最差。该技术可以很好的解除裂缝中堵塞的煤粉、气泡,清除地层污染,快速恢复产量,对地层有很好的解堵作用。综合分析储层地质、工程以及排采等方面对措施效果的影响认为:电脉冲增产技术应优选采出程度低、一次压裂效果好、储层产水量大以及煤体结构以原生结构煤为主的储层进行实施。
To analyze the adaptability of high-voltage electric pulse technology in the transformation of low-production coalbed methane wells,three types of low-production wells in the southern Qinshui Basin were transformed with the electrical pulse stimulation technology.The results show that the high-voltage electric pulse technology has the best effect on low-production wells with reservoir damage,followed by low-production wells with poor fracturing effect,and the worst effect on low-production wells due to resource decreasing.This technology can well remove the pulverized coal and air bubbles clogged in the cracks,clear the formation pollution,quickly restore the production,and have a good removal effect on the formation.A comprehensive analysis of the impact of reservoir geology,engineering,and drainage on the effect of the measures proposes that:the electric pulse stimulation technology could preferably be implemented in reservoirs with low recovery,good primary fracturing effect,large reservoir water production,and coal body structure dominated by primary structure coal.
作者
张金笑
张聪
仝世伟
郭晶
张慧
朱敏
ZHANG Jinxiao;ZHANG Cong;TONG Shiwei;GUO Jing;ZHANG Hui;ZHU Min(Shanxi Coalbed Methane Exploration and Development Branch,Shanxi 046000)
出处
《中国煤层气》
2022年第5期3-8,共6页
China Coalbed Methane
基金
国家重大专项项目“沁水盆地高煤阶煤层气高效开发示范工程”(2017ZX05064)
中国石油天然气股份有限公司重大科技专项课题五“煤层气藏生产规律与技术政策研究”(2017E-14050)
关键词
电脉冲
递减
水力压裂
储层伤害
储层解堵
Electric pulse
decreasing
hydraulic fracturing
reservoir damage
reservoir removal
