中低温水井清洁型凝胶压裂液设计与研究
投稿时间:2021-06-29  修订日期:2022-02-21  点此下载全文
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冯建月 中国地质调查局水文地质环境地质调查中心 071051
王营超 中国地质调查局水文地质环境地质调查中心 071051
李小杰 中国地质调查局水文地质环境地质调查中心 071051
叶成明 中国地质调查局水文地质环境地质调查中心 071051
基金项目:国家重点研发计划项目“地下饮用水源快速探测与开采技术”(编号:2018YFC1508703)
中文摘要:基岩水井压裂增水技术自研发以来取得较为良好的增产效果,但该技术目前仍存在适用性差、增产效果不确定等问题。基于压裂增水过程中流体流态和裂缝宽度影响因素分析结果,确定了提高压裂液粘度是较为经济、有效的增产技术措施。开展了水井和中低温地热井清洁型凝胶压裂液配方的设计工作,进行了稠化剂、pH调节剂、交联剂和破胶剂选配与性能实验,研发了适用于水井和中低温地热井(30~80℃)清洁型凝胶压裂液体系并开展现场试验。对凝胶压裂液配液应用难点与使用成本进行了分析,进一步补充完善了水井压裂增水技术在压裂液方面的研究。
中文关键词:基岩水井  地热井  水力压裂  凝胶压裂液  
 
Design and Research of Clean Gel Fracturing Fluid for Medium and Low Temperature Wells
Abstract:Since the development of bedrock well fracturing technology, it has achieved good stimulation effect, but there are still some problems such as poor applicability and uncertain stimulation effect.Based on the analysis results of fluid flow pattern and fracture width influencing factors in the process of fracturing water increase, it is determined that increasing the viscosity of fracturing fluid is a more economic and effective stimulation technical measure.The design of clean gel fracturing fluid formulations for wells and middle and low temperature geothermal wells has been carried out, and thickener, pH regulator, crosslinking agent and gel breaker have been selected and tested.A clean gel fracturing fluid system suitable for wells and medium and low temperature geothermal wells (30~80℃) has been developed and carries out the field test.The application difficulties and cost of gel fracturing fluid are analyzed, and the research on fracturing technology of water well fracturing is further perfected.
keywords:bedrock water well  geothermal well  hydraulic fracturing  gel fracturing fluid
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