一种新的密闭取心饱和度校正方法研究

由于在密闭取心和饱和度测试过程中，岩心中的流体存在一定的损失，Y井常规密闭取心油水饱和度测试结果和地下真实情况存在偏差，必须进行校正，而传统校正方法的油水等比例散失原则存在不合理性。此文提出一种新的校正方法，将蒸馏法饱和度测试后的岩心组成长岩心，在地层条件下进行水驱油物理模后取至地面条件进行蒸馏法饱和度测试，对油水饱和度的损失比例进行了标定，完成了对Y井密闭取心饱和度测试资料的校正。校正结果与测井解释成果对比分析表明，长岩心水驱油校正结果准确可靠，有助于油田水淹层的判断和开发调整策略的制定。

A New Method for Correcting Saturation from Sealed Coring

A certain amount of liquid in the core sample may be lost in the process of sealed coring and saturation testing, which may result in deviation between the oil and water saturation measured with these in-situ. There is some irrationality in the traditional saturation correction in which the loss of oil and water is considered to be equal. The authors tried a new method in the process of saturation correction of sealed coring samples from Well Y to eliminate the deviation. First step, put the cores that have been measured by distillation saturation test into a long core; Second step, conduct the water flooding simulation under the stimulated formation condition and then the distillation saturation test under surface condition; Third step, calibrate the lost percentage of oil and water saturation and then correct saturation test data of sealed coring from Well Y. Compared with the interpretation results of logging data, it shows that the results corrected by water flooding experiment of long core are precise and faithful, and are helpful to identify the water-flooded zone in the oil field and set out the adjustment strategy of development wells.