东濮凹陷杜寨地区沙三中-下段致密砂岩气藏有效储层物性下限

发布时间：2018-07-06 08:43

本文选题：致密砂岩气藏 + 物性下限　；参考：《地质科技情报》2017年03期

【摘要】：东濮凹陷杜寨地区沙三中-下段致密砂岩储层具有典型的低孔、低渗特征,但其储层物性下限尚不明确。为此,基于岩心实测孔隙度、渗透率和压汞资料等,综合采用经验统计法、孔隙度-渗透率交会法、最小流动孔喉半径法(水膜厚度法、Purcell法、Wall法)及压汞曲线法等多种方法,确定了杜寨地区沙三中-下段致密砂岩气藏有效储层的物性下限。结果表明,不同方法确定的物性下限值存在一定差异,杜寨地区沙三中-下段致密砂岩气藏有效储层的孔隙度下限值介于3.92%~5.306%之间,平均值为4.264%;渗透率下限值范围为0.032×10~(-3)~0.059×10~(-3)μm~2,平均值为0.038 7×10~(-3)μm~2。总体上,经验统计法确定的物性下限值较低,而最小流动孔喉半径法和压汞曲线法确定的物性下限值较高,特别是Purcell法计算所得的物性下限值明显高于其他方法,可能与其更能表征大孔喉的贡献有关。在此基础上采用算术平均法,综合确定杜寨地区沙三中-下段有效储层的孔隙度下限值为4.264%,渗透率下限值为0.038 7×10~(-3)μm~2。
[Abstract]:The tight sandstone reservoirs in the middle and lower member of Sha 3 in Duzhai area of Dongpu depression have typical characteristics of low porosity and low permeability, but the lower limit of reservoir properties is not clear. Therefore, based on the measured porosity, permeability and mercury injection data of cores, the empirical statistical method, porosity permeability intersection method, minimum flow pore throat radius method (water film thickness method / Purcell method / Wall method) and mercury injection curve method are used. The lower limit of physical properties of the tight sandstone gas reservoir in the middle and lower member of Sha 3 in Duzhai area is determined. The results show that the lower limit values of physical properties determined by different methods are different to a certain extent, and the lower limit of porosity of the effective reservoir of tight sandstone gas reservoirs in the middle and lower member of Sha 3 in Duzhai area is between 3.92% and 5.306%. The average value is 4.264 and the lower permeability range is 0.032 脳 10 ~ (-3) 渭 m ~ (-3) 渭 m ~ (-2), the average value is 0.038 7 脳 10 ~ (-3) 渭 m ~ (-3) 渭 m ~ (-2). In general, the lower limit of physical properties determined by empirical statistical method is lower, but the lower limit of physical property determined by minimum flow pore throat radius method and mercury injection curve method is higher, especially the lower limit value of physical property calculated by Purcell method is obviously higher than that of other methods. It may be related to its better characterization of the contribution of macropore larynx. On this basis, the arithmetic average method is used to determine comprehensively that the lower limit of porosity and permeability of the effective reservoir in the middle and lower member of Sha 3 in Duzhai area are 4.264 and 0.038 脳 10 ~ (-3) 渭 m ~ (-3) 渭 m ~ (-2) respectively.
【作者单位】：中国石油大学(华东)地球科学与技术学院;
【基金】：国家重大科技专项(2011ZX05006-004)
【分类号】：P618.13

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