支撑剂嵌入深度计算模型  

A Calculation Model of Proppant Embedment Depth

作　　者：赵金洲[1] 何弦桀 李勇明[1] 

机构地区：[1]油气藏地质及开发工程国家重点实验室(西南石油大学),四川成都610500

出　　处：《石油天然气学报》2014年第12期209-212,13,共4页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(51344005);新世纪优秀人才支持计划项目(NCET-11-1062);四川省杰出青年学术技术带头人资助计划项目(2012JQ0010)

摘　　要：压裂施工后,支撑剂嵌入人工裂缝壁面会导致支撑缝宽减小、导流能力降低,严重影响压裂改造效果。为了明确闭合压力、弹性模量等参数对嵌入深度的影响,在弹性力学理论的基础上,建立了考虑缝面变形的支撑剂嵌入深度计算模型。应用该模型进行了实例计算,并对闭合压力、弹性模量、支撑剂粒径等参数进行了敏感性分析。计算结果显示,该模型准确度高、与试验测试结果符合良好,支撑剂嵌入深度随闭合压力的增大而增大,随弹性模量和支撑剂粒径的增大而减小。该研究对于优化压裂设计方案、增加施工成功率和准确评价压裂改造效果具有重要意义。After fracturing operation,the proppant embedded in hydraulic fracture wall would result in narrow propped fracture width,reduce the conductivity of fractures and affect the effect of fracturing reconstruction seriously.In order to clarify the influence of closure pressure,Young's modulus and other parameters on the embedment depth,based on elasticity theory,a theoretical calculation model for proppant embedment depth considering the fracture surface deformation was established.The model was used for the calculation of a gas reservoir,and the sensitivity of closure pressure,Young's modulus and the grain size of proppant was analyzed.The calculation result shows that the model has higher accuracy and it is coincident well with that of laboratory experiment.The proppant embedment depth increases with the increase of closure pressure and it decreases with the increase of Young's modulus and the grain size of proppant.It is of great significance for optimizing the fracturing design plan,raising the success rate of operation and evaluating the fracturing effect accurately.

关 键 词：支撑剂嵌入 弹性力学 嵌入深度 模型 计算分析 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]