模糊灰元理论在注水井压裂选井选层中的应用

Application of Fuzzy Gray Body Theory in the Fractured Lay-er Choice of Water Well

水力压裂是油水井增产增注的有效手段,选井选层又直接影响压裂效果的好坏。以往都是通过地质分析,依靠工作人员的经验定性地选择出压裂的井与层,工作量较大,往往选择出的井与层又不是最优的,对油田生产没有产生最佳效果。为了改变这种状况,在灰色理论的基础上,结合模糊灰元概念,给出了模糊灰元分析方法。该方法可用于压裂井及层的优选,通过从地质和开发2个角度来考虑问题,利用所提出的模糊灰元理论,对准备压裂的注水井和层进行优选。实践证明该方法是可行的,既减少了工作人员的工作强度、提高了工作效率,又达到了最佳压裂效果。

Hydraulic fracturing is an effective method to stimulate oil production and water injection, but the fractured layer choice directly influences the results of a well fracturing. In the past, the fractured layer choice was qualitatively made by geological analysis and the employee' s experience, thus led to large amount of work quantity and furthermore the chosen layers imperfect, finally resulted in not favorite effects. In order to change this situation, on the basis of gray theory, fuzzy body analytical method is presented with the integration of fuzzy gray body consideration and fractured water injection wells and layers are chosen optimally. The practice shows that the method is feasible: it can not only reduce the work strength and enhance work efficiency, but also reach optimum fracturing effects.