固相颗粒对致密油气藏裂缝应力敏感性影响的试验研究  

Experimental Study on Influence of Solid Particles on Stress Sensitivity of Fractures in Tight Oil and Gas Reservoirs

作　　者：赵向阳 ZHAO Xiangyang(Sinopec Research Institute of Petroleum Engineering Co.,Ltd.,Beijing,102206,China)

机构地区：[1]中石化石油工程技术研究院有限公司,北京102206

出　　处：《石油钻探技术》2024年第3期68-74,共7页Petroleum Drilling Techniques

基　　金：国家重点研发计划课题“井筒稳定性闭环响应机制与智能调控方法”(编号:2019YFA0708303)资助。

摘　　要：裂缝是致密油气藏重要的流体渗流通道,其应力敏感性对于油气井产量影响很大,固相颗粒是影响裂缝应力敏感性的重要因素。在有无固相颗粒、固相颗粒不同铺置方式及不同固相颗粒浓度的条件下,开展了固相颗粒对裂缝应力敏感性影响的室内试验。试验发现,裂缝应力敏感程度由大到小依次为无固相、全铺低浓度固相颗粒、全铺中等浓度固相颗粒、全铺高浓度固相颗粒、半缝中等浓度固相颗粒、高导流铺置固相颗粒;固相颗粒能够有效减弱裂缝的应力敏感性,裂缝应力敏感损害不可逆。研究结果为预防和控制裂缝应力敏感损害提供了理论依据。Fractures in tight oil and gas reservoirs are critical fluid seepage channels,and their stress sensitivity significantly influences the production of oil and gas wells.Solid particles play a crucial role in affecting the stress sensitivity of fractures.This study examined the impact of solid particles on fracture stress sensitivity in a laboratory setting under various conditions,including the presence or absence of solid particles,different paving methods of solid particles,and varying particle concentrations.The results indicate that the stress sensitivity of fractures,ranked from highest to lowest,is as follows:no solid particles,fully paved with low-concentration solid particles,fully paved with medium-concentration solid particles,fully paved with high-concentration solid particles,half-filled with mediumconcentration solid particles,and high-diversion and paved solid particles.The presence of solid particles effectively reduces the stress sensitivity of fractures,and the damage to the stress sensitivity of fractures is irreversible.These findings provide a theoretical basis for preventing and controlling damage to the stress sensitivity of fractures.

关 键 词：致密油气藏 固相颗粒 应力敏感性 颗粒浓度 颗粒铺置方式 实验室试验 

分 类 号：TE215[石油与天然气工程—油气井工程]