苏里格气田苏14井区中二叠统下石盒子组盒_(7)段有效储层综合评价

COMPREHENSIVE EVALUATION OF HE7 EFFECTIVE RESERVOIR OF MIDDLE PERMIAN LOWER SHIHEZI FORMATION IN WELL BLOCK OF SU-14 OF SULIGE GAS FIELD

苏14区块盒_(7)段是苏里格气田的次产层,研究程度低,为探明其储量规模,结合测井资料和试气产量,对盒_(7)段有效储层进行综合评价,为下一步开发提供决策支持。本次研究利用经验公式和回归分析方法建立了泥质含量、孔隙度、渗透率、含气饱和度的测井解释模型;基于储层参数与试气产量的交会分析,确定盒_(7)段有效储层参数下限标准;采用灰色关联法建立研究区盒_(7)段储层评价标准,对研究区盒_(7)段储层进行了分类评价和有效储层评价。研究表明,盒_(7)段储层可分为3类,其中Ⅰ类储层占比13.89%,Ⅱ类储层占比42.25%,Ⅲ类储层占比43.86%;盒_(7)段有效储层发育区的面积合计约28.6 km^(2),呈现出滩坝状的发育特征,表明盒;段储层质量不高。该成果可为苏14区块下一步开发提供依据。

The less studied He7 member reservoir in Su-14 wellblock is the secondary production layer of Sulige gas field.Based on the logging data and gas test output,comprehensive evaluation of the effective reservoir of He7 member is carried out in order to find out the reserve scale and provide decision support for the next development.Empirical formula and regression analysis method are used to establish the logging interpretation model of shale content,porosity,permeability and gas saturation.The lower limit standard of effective reservoir parameters in He7 member is determined through the intersection analysis of reservoir parameters and gas test production,and the reservoir evaluation standard of He7 member in the research area is established through grey correlation method so as to carry out the reservoir classification and effective reservoir evaluation.The research shows that the He7 reservoir can be divided into three types,of which the proportion of typeⅠreservoir is 13.89%,the proportion of typeⅡreservoir is 42.25%,and the proportion of typeⅢreservoir is 43.86%.It reveals that the reservoir quality of He7 member is low because the total area of He7 member effective reservoir is only about 28.6 km^(2) and shows the development characteristics of beach and bar.The research results provide a basis for the further development of Su-14 well block.