靖安油田盘古梁长6油藏流动单元的定量划分

Quantitative division of flow units in Panguliang Chang 6 reservoir,Jing'an oilfield

史成恩 解伟 孙卫 梁晓伟 闫林

Shi Chengen Xie Wei Sun Wei Liang Xiaowei Yan Lin

以靖安油田盘古梁长6油藏为例,在沉积微相、储层综合定量分析评价基础上,选取储层厚度、孔隙度、渗透率、泥质含量、流动带指数、储层厚度与孔隙度乘积6个参数进行流动单元的划分。应用高分辨率层序地层学将长6油藏精细划分为15个小层,将所有砂体划分为E,G,M和P 4类流动单元。结果表明,盘古梁长6底部和盘古梁长6顶部是研究区盘古梁长6油层组的主力油层,各类流动单元与储层岩性、物性、沉积微相和产能具有很好的对应关系。此次流动单元划分的参数取值,综合评价函数与评价指标,能够真实客观地反映低渗、低孔、储层物性差、非均质性强等地质特征,符合该类储层流动单元评价划分的精度要求。

Taking Panguliang Chang 6 reservoir in Jing'an oilfield as an example,six parameters,including reservoir thickness,porosity,permeability,shale content,flow-zone index,and the product of reservoir thickness and porosity,are selected for quantitative division of flow units,based on comprehensive quantitative analysis and evaluation of sedimentary microfacies and reservoir.Panguliang Chang 6 reservoir is finely divided into 15 sublayers,and all the sandbodies can be grouped into 4 types of flow units,including E,G, M and P,by using high resolution sequence stratigraphy.The results show that the bottom of Panguliang Chang 6 and the top of Panguliang Chang 6 are the major pay zones of Panguliang Chang 6 reservoir in the study area,and all the flow-unit types are well correlated with lithologies,physical properties,sedimentary microfacies and productivity of the reservoir.The selected values of parameters,comprehensive evaluation functions and indexes for the flow unit division can truly and objectively reflect the geologic features of low permeability and low porosity reservoir,such as poor poroperm characteristics and strong heterogeneity,and can meet the accuracy requirements of flow unit evaluation and division for this kind of reservoir.

10.11743/ogg20060215