摘要
针对安棚油田的地质特征,对地应力计算经验模型进行了优选,根据选出的地应力计算模型的理论基础和井壁岩石的破裂机理,确定出了适合安棚油田的地层破裂压力和坍塌压力的计算模型。采用测井资料计算了模型中的各种中间参数,实现了对地应力、地层破裂压力以及坍塌压力的连续计算。在此基础上,综合使用地层压力、地层破裂压力以及坍塌压力等因素确定出了安全钻井液密度范围。利用该方法对安棚油田b252和an2051井的资料进行了处理。结果表明,利用测井资料计算得到的地应力值和安全钻井液密度范围是准确的,能满足现场钻井施工的需要。
Numerical model for formation stresses calculation was optimized based on the geology of Anpeng oilfield.Using the data obtained from electric logging,continuous calculation of formation stresses,fracturing pressures and sloughing pressures.Safe mud densities were determined based on the above calculations.The application of the calculation method in wells b252 and an251 in Anpeng oilfield showed that the calculation was quite accurate and can satisfy the need imposed by drilling operation.
出处
《钻井液与完井液》
CAS
北大核心
2008年第1期63-66,共4页
Drilling Fluid & Completion Fluid
关键词
安全钻井液密度窗口
测井资料
地应力
Safe drilling fluid density windows
Electric logging data
Formation stresses
