摘要
考虑地层岩石存在天然微裂隙这一客观事实,建立了地应力与压裂液共同作用时,地层裂隙的应力强度因子表达式;根据断裂判据,推得了地层破裂压力计算模型;并对某油田几口井进行了实算与电算对比,验证了模型的可靠性。
Based on the fact that natural micro-crack exists in formation rock, this paper established the fracture stress intensity factors formulas under the action of both formation stress and fluid stress. On the basis of fracture criterion, models for computing the formation fracture pressure had been obtained and the reliability of those models had been proved through comparison of actual computation of several wells in a certain oilfield.
出处
《钻采工艺》
CAS
2004年第6期19-22,共4页
Drilling & Production Technology
基金
陕西省自然科学研究基金资助项目(项目编号为:2001C54)
关键词
地应力
破裂压力
断裂应力强度因子
断裂韧性
formation stress, fracture stress, fracture stress intensity factor, fracture toughness
