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本文利用测井资料,采用等效深度法求得了加蓬区块3口井的地层孔隙压力,利用常规测井资料计算岩石力学特征参数、进行地应力分析,在此基础上计算井壁破裂压力、坍塌压力,进行井眼稳定性评价,得到了试工区地层的钻井液密度安全窗口。从力学角度出发,计算地层孔隙压力、进行井眼稳定性评价,可以为钻井工程设计钻井液密度提供重要参考依据,具有较大的实用价值。
In this paper, the pore pressure of three wells in the Gabon block was calculated by the equivalent depth method using the well logging data, the rock mechanics characteristic parameters were calculated by using the conventional well logging data, the geostress analysis was carried out, and the rupture pressure, Collapse pressure, borehole stability evaluation, test drilling fluid density of the formation of the security window. From the mechanics point of view, calculating the pore pressure of the formation and evaluating the wellbore stability can provide an important reference for the design of drilling fluid density and has great practical value.