运用测井资料确定潜水面

Identification of The Ground Water Surface With Log Data

柴达木盆地西部地区气候干燥,部分地区地下水面(即潜水面)较深,加上浅部地层疏松,在测井曲线上表现为非常明显的储层特征,试油时无任何流体产出,如果测井解释人员不了解区域特征,很容易将该类层解释为有效储层。各构造潜水面深度不一致,即使在同一构造,由于受到断层分隔,潜水面也有区别。通过大量测井资料和试油资料分析,总结了一套利用测井资料确定潜水面的方法,在生产实际中见到明显效果。

Because of the deeper phreatic water surface caused by dry air in some regions of Caidamu basin and looser stratum in the upper part, very distinct reservoir characters could be found on logs. But there aren＇t any fluid out in oil-testing. Thus this kind of reservoir would be misunderstood as an effective one without knowing the characters. Furthermore, the water surface is different in different structures, even in the same structure there would be difference because of the fault isolation. A set of approach to determining the water surface is worked out with logs affer analysing large quantity of logs and oil-testing information. It is proved this approach is effective in actual practice.