大庆石油地质与开发2012，Vol.31Issue(2)：120-124,5.DOI:10.3969/J.ISSN.1000-3754.2012.02.024
水平井分段压裂总应力场计算模型
COMPUTATING MODEL OF TOTAL STRESS FIELD OF THE STAGED FRACTURING FOR HORIZONTAL WELL
摘要
Abstract
When multiple-fracture broken one by one, there are certain interference among them. Due to the dif ferent properties of fracturing fluid, injection rate, broken fracture number and fracture location, the initial fractu ring pressures are also various. Focused on the calculation problem of the initial fracturing pressure for the staged fracturing in Changqing Oilfield, the influencing factors such as borehole pressure, initial earth stress distribution, the filtration effect of the fracturing fluid, the inducing stress of current hydraulic fractures and so on are compre hensively considered. Based on the superposition principle and elastic mechanics theory, the calculating model of the total stress field mathematical while staged fracturing for horizontal well is established to analyze the initially fractured laws. The theoretical calculation of the eachfracture initial fracturing pressure for one of fractured horizon tal well is well matched with that of field measurement in a certain block of the oilfield. The model can not only qualitatively study the influence trend of the former broken fractures on the later ones, but can quantitatively com putting the breakdown pressure values of each-fracture, so it can soundly guide the design of fracturing operation.关键词
分段压裂/应力场/诱导应力/起裂压力Key words
staged fracturing/ stress field/ inducing stress/ initiation fracturing pressure分类
能源科技引用本文复制引用
吕志凯,何顺利,黄伟,刘广峰,冯沙沙..水平井分段压裂总应力场计算模型[J].大庆石油地质与开发,2012,31(2):120-124,5.基金项目
国家科技重大专项子课题“(特)低渗透油藏工程新理论与新方法”(2009ZX05009-004)资助. （特）
