岩石物理相约束下的低渗储层物性测井评价

Logging evaluation for physical property of low permeability reservoir in petrophysical facies conditions

低渗致密储层通常具有受成岩作用影响大、孔吼细小、非均质性强的特点,利用测井资料进行储层物性预测存在一定困难。吉林油田扶余油层主要沉积相类型为浅水三角洲,利用流动带指标,把储层分为孔隙结构相对均匀的4类岩石物理相,利用研究区储层各类测井、岩心资料,分别建立物性预测模型,将非线性问题转化为线性问题,有效提高了致密储层物性预测模型的精度。

Tight reservoir with tight low permeability usually has the characteristics of small hole,strong heterogeneity and seriously affected by diagenesis. And there are some difficulties in predicting reservoir properties by well logs. The main sedimentary facies in Fuyu oil layer of Jilin oilfield is shallow water delta. In this article,the tight reservoir was divided into four kinds of petrophysical facies,according to FZI. Reservoir properties interpretation models were built for different types of petrophysical facies by using the available logging and core data obtained from the study area,and turn the nonlinear problem into a linear problem,which has effectively improved the tight reservoir porosity and permeability parameters calculation accuracy.