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目前,动态监测取压方式主要为取油套压检查井口压力与用压力计测压力的方法。但上述方法均存在局限性,即每口井只能测试出一个压力值,不能充分反应出任意层位的压力值。而在钻井过程中,由于岩石组成与结构的变化、地层流体差异等原因会不同程度的改变测井曲线值,使得曲线发生相应变化,利用这种变化可以真实反映地层压力变化并计算出地层压力变化系数。针对油田高含水开发后期,平面和层间压力分布不均衡、调整挖潜和防治套损难度加大的现状,在不同压力下根据自然电位的变化来确定压力并准确计算压力值。利用过滤电位和压差的相关性可以对储层的压力状态进行判别与精准的解释。
At present, the main method of dynamic pressure monitoring is the method of checking the pressure at the wellhead and measuring the pressure with pressure. However, the above methods all have limitations, that is, each well can only test one pressure value and can not fully reflect the pressure value of any layer. In the process of drilling, the logging curves are changed to some extent due to changes in composition and structure of rock, formation fluids and other factors, so that the curve can be changed correspondingly. By using this change, the formation pressure can be truly reflected and the formation pressure can be calculated Coefficient of variation. Aiming at the current situation that oil and gas fields are unevenly distributed in the late stage of high water cut, the potentiality of digging potential and preventing casing damage are increased, the pressure is determined and the pressure value is accurately calculated according to the change of natural potential under different pressures. The correlation between the filtration potential and the pressure differential can be used to discriminate and precisely explain the pressure status of a reservoir.