深水钻井安全钻井液密度窗口计算模型的建立与应用——以西非AKPO深水油田为例

摘要

以西非AKPO油田为例,对深水浅层和深层的井壁稳定性分别采用塑性力学和弹性力学理论进行了研究,建立了深水钻井安全钻井液密度窗口计算模型.该模型在AKPO深水油田钻井实践中得到了验证,对类似深水油田井壁稳定性分析有借鉴意义.%Using the AKPO oilfield in West Africa as a case, the wellbore stabilities in shallow and deep formations during deep water drilling were studied with plastic mechanics and elastic mechanics respectively, and a calculation model of safe drilling fluid density window was obtained for deep water drilling. The model has been verified in drilling practice in AKPO deep water oilfield and it provides a reference for wellbore stability analysis in other deep water oilfield.