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本文以永乐油田为例，提出了一种适合泥质砂岩储层的有效孔隙度参数解释方法。从油田地质特征入手，通过自然伽马标准层校正建立声波时差、自然伽马相对值及岩心孔隙度三参数复相关关系式，用来计算储层有效孔隙度。与以往二参数建立单相关关系式计算结果对比表明，新方法解释精度明显提高，理论依据也更为充分。
Taking Yongle Oilfield as an example, this paper presents an effective porosity parameter interpretation method suitable for shaly sandstone reservoirs. Beginning with the geological features of the oilfield, the correlativity between acoustic time lapse, relative value of natural gamma ray and core porosity is established by calibration of gamma ray standard layer to calculate the effective porosity of reservoir. Compared with the previous two parameters to establish the single correlation equation, the results show that the accuracy of the new method is obviously improved and the theoretical basis is more sufficient.