裂缝性火山岩储气层测试压裂诊断特征参数研究与应用

Study and application of fracture diagnostic technology for naturally fractured volcanic gas reservoir

针对天然裂缝发育及局部构造变化大导致压裂中出现高滤失、高停泵压力梯度以及近井高摩阻等疑难问题,以大庆徐家围子深部火山岩储气层为例,在国内首次运用测试压裂解释技术,评价了火山岩储气层的定量特征参数,奠定了裂缝性火山岩储气层压裂控制措施研究与应用的基础。经过在大庆火山岩储层应用,压裂施工成功率得到大幅度提高,增产效果显著,对提高水力压裂技术在裂缝性储层应用具有重要意义。

It is the first time applying mini-fracture diagnostic technology to volcanic gas reservoir evaluation, taking the deep volcanic gas pools in Xujiaweizi area of Daqing for example, answering the queries and finding out quantitative characteristic parameters of high filtration in fractures caused by natural fracture growth and regional structure variation, large pressure gradient off pump and near well high friction resistance. The study lays a foundation for induced fracture controlling treatment researches. Application in volcanic gas reservoirs of Daqing shows that the success rate of fracturing increases significantly with obvious production increment, implying that the technology worth theoretically and realistically to promote the application of hydraulic fracture in naturally fractured reservoirs.