石油勘探与开发2018，Vol.45Issue(1)：149-156,8.DOI:10.11698/PED.2018.01.16
水力压裂支撑剂嵌入深度计算方法
Calculation method of proppant embedment depth in hydraulic fracturing
摘要
Abstract
For the issue of proppant embedment in hydraulic fracturing,a new calculation method of embedment depth considering elastic-plastic deformation was proposed based on the mechanism of proppant embedment into rocks by combining proppant embedment constitutive equations and contact stresses on the rock-proppant system.And factors affecting embedment depth of proppant were analyzed using the new method.Compared with the elastic embedment model,the results calculated by the new method match well with the experimental data,proving the new method is more reliable and more convenient to make theoretical calculation and analysis.The simulation results show the process of proppant embedment into rocks is mainly elastic-plastic.The embedment depth of monolayer proppants decreases with higher proppant concentration.Under multi-layer distribution conditions,increasing the proppant concentration will not change its embedment depth.The larger the proppant embedment ratio,the more the stress-bearing proppants,and the smaller the embedment depth will be.The embedment depth under higher closure stress is more remarkable.The embedment depth increased with the drawdown of fluid pressure in the fracture.Increasing proppant radius or the ratio of proppant Young's modulus to rock Young's modulus can reduce the proppant embedment depth.关键词
水力压裂/支撑剂/嵌入深度/本构方程/接触应力/弹塑性变形/铺置浓度Key words
hydraulic fracturing/proppant/embedment depth/constitutive equation/contact stress/elastic-plastic deformation/proppant concentration分类
能源科技引用本文复制引用
陈铭,张士诚,柳明,马新仿,邹雨时,周彤,李宁,李四海..水力压裂支撑剂嵌入深度计算方法[J].石油勘探与开发,2018,45(1):149-156,8.基金项目
国家重点基础研究发展计划(973)项目“陆相致密油高效开发基础研究”(2015CB250903) （973）
国家自然科学基金“致密油压裂水平井渗流机理研究”(51574255) （51574255）
国家油气重大专项“致密油储层高效体积改造技术”(2016ZX05046-004) （2016ZX05046-004）
