基于线性压裂滤失模型的疏松砂岩裂缝起裂数值模拟研究  

Numerical Simulation of Cracking in Unconsolidated Sandstone Based on PDFL Filtration Model

作　　者：马楠 文敏 黄辉 曹砚锋 邱浩 潘豪 侯泽宁 MA Nan;WEN Min;HUANG Hui;CAO Yanfeng;QIU Hao;PAN Hao;HOU Zening(Research Institute of CNOOC,Beijing 100029,China)

机构地区：[1]中海油研究总院,北京100029

出　　处：《重庆科技学院学报（自然科学版）》2022年第4期21-25,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家自然科学基金项目“深水油气钻采井筒压力控制基础研究”(51734010)。

摘　　要：基于线性压裂滤失模型,建立考虑储层岩石弹塑性变形的有限元模型,对疏松砂岩裂缝起裂规律进行数值模拟研究。计算结果表明:对于低渗储层,裂缝起裂较容易,裂缝起裂长度较长;对于中高渗储层,较大差异的地应力和较低的岩石强度不利于裂缝的起裂和扩展;对于特高渗储层,裂缝起裂较难,起裂长度较短。In order to study the influence of permeability,in-situ stress condition and rock strength of unconsolidated sandstone reservoir on fracture initiation,a finite element model considering elastic-plastic deformation of reservoir rock is established based on linear fracturing filtration model,and the fracture initiation law of unconsolidated sandstone is numerically simulated.The results show that the low permeability reservoir has a smooth fracture initiation and a long fracture initiation length.For medium and high permeability reservoirs,larger rock strength and more uniform in-situ stress are more conducive to their initiation.Extremely high permeability reservoirs are difficult to fracture.

关 键 词：出砂预测 防砂方法 压裂充填 压裂模拟 疏松砂岩 

分 类 号：TE53[石油与天然气工程—油气田开发工程]