关于水淹层地层水电阻率的探讨

DISCUSSION OF THE FORMATION WATER RESISTIVITY IN A WATER-FLOODED ZONE

注水开发油田水淹层地层水电阻率不仅是水淹层评价十分重要的基础参数,也是制约水淹层评价的“瓶颈”。针对不同油藏开发需要,已经开发出多种求取方法,在生产实践中见到不同程度的应用效果。通过对前人研究成果的分析总结,认为常规测井条件下求取水淹层地层水电阻率存在三个难以克服的问题,因而地层水电阻率计算不能期望太高的精度。估计方法必须充分结合现阶段注水开发条件,以达到更好的地质效果。提出水淹层地层水电阻率求取的几点认识,希望能为今后研究人员提供有益的参考和借鉴。

In waterflood-production oilfields, formation water resistivity of water-flooded zone is not only the basic parameter for water-flooded zone evaluation but also the 'bottle neck' which restrict water-flooded zone evaluation.According to different demands in reservoir development, several methods have been developed, which have achieved good result in production.Through analysis of former research findings, it is thought that there are 3 problems in getting the formation water resistivity of water-flooded zone by conventional logging. Therefore, the precision of calculated formation water resistivity can not be expected high.The estimation method must be combined with waterflood development condition on the stage to achieve better geological result.Some understandings about the solution of formation water resistivity are put forward, which will helpful for the researchers in the future.