利用全烃和伽马曲线形态优选压裂层段方法

Discussion on the method of using total hydrocarbon and gamma curve patterns to optimize fractured intervals

苏里格气田为低丰度、低压、低渗、非均质性强的岩性气藏,气层纵向结构复杂,一井多层、一层多段现象普遍,多层合求对气层优选和产能预测提出了更高的要求。通过录井全烃、测井自然伽马曲线以及压裂井采气层产能情况进行综合分析,借助统计分析方法,利用图板拟合的方式对储集层进行分类评价,提出了利用全烃、自然伽马相结合优选压裂层段的方法,为该气田气井压裂层段优选和提高单井产能提供了可借鉴的途径。开发井的解释评价表明,该方法是优选压裂层段的一种简便可行的方法。

Sulige gas field is a lithologic gas reservoir,which is of low abundance,low pressure,low permeability and high heterogeneity and complexity in its vertical structure,and the phenomena of multiple-layers for one well and multiple-sections for one layer are common in it,thus putting forward the greater demand of estimating the production amount for gas zone optimization and productivity prediction.The classified evaluation of reservoirs was made,through comprehensive analyses of total hydrocarbon of mud logging,natural gamma value of well logging and the productivity of gas production reservoirs of fractured wells,with the aid of statistical analysis and using the mode of chart fitting.The paper brought forward a method,which combined total hydrocarbon with natural gamma to optimize fractured intervals,and proposed a way for reference for optimizing fractured layers of gas wells in Sulige gas field and enhancing single well productivity.The interpretation and evaluation of development wells indicated that this is an easy and feasible method for optimizing fractured intervals.