专家系统模糊识别理论在河南油田聚合物驱整体调剖中的应用

Application of Expert System Fuzzy Identification Theory in Bulk Profile Control of Polymer Flooding in Henan Oilfield

河南油田聚合物驱整体调剖评价是一项复杂且具有多目标元素的工程,由于衡量调剖效果的因素很多,所以必须综合考虑各种因素的影响,对调剖效果利用模糊数学的方法进行综合评价。通过专家系统模糊识别理论在河南油田双河V上层系聚合物驱整体调剖评价中的实践,证明该方法在现有技术条件下能够充分真实反应聚合物驱调剖效果:整体大剂量调剖后,双河油田V上层系12口注水井压力平均上升了3.4MPa,启动压力上升了7.3MPa;对应21口油井,有17口见效,见效率为80.9%,油井见效率较局部调剖提高了15个百分点,累计增油10476t;同时,整体大剂量调剖作为聚合物驱的一项配套措施,可使聚合物防窜能力提高23.6%。

The bulk profile control and evaluation of polymer flooding in Henan oilfield is a complex engineering with many target elements. Because there are many factors of measuring the profile control effect,all kinds of influence factors must be comprehensively considered and the profile control effects must be synthetically evaluated by using the fuzzy mathematics method.In the practice on the Shuanghe V upper series,the bulk profile control of polymer flooding that the method can be really enough is evaluated by expert system fuzzy identification theory,which proves to illustrate the profile control effect under present technology condition.After the bulk profile control by using a great deal of profile control agents ,the average injection pressure of 12 wells increases 3.4MPa and the starting pressure increases 7.3MPa.In the corresponding 21 oil wells, 17 wells are responding with a responding rate of 80.9% ,which increases 15 percent points.Accumulative oil increases 10476t.At the same time,the bulk profile control is used as a matching measure for polymer flooding and can make the anti-channeling capacity of polymer improve 23.6%.