井网三次加密与三次采油方法结合研究

我国油田正面临井网的三次加密,开采对象是一次加密和二次加密未动用的所有油层,二次加密后的剩余油决定了三次加密的不均匀性,且在层系上不具有独立性。聚合物驱的井网开发过后,还有相当一部分油层未能进行三次采油,有必要进一步开发。分析了三次加密和三次采油单独开采的缺陷,介绍二者结合的可能方法,并通过数模对各种可能的结合方法进行模拟,结果证明三次加密与三次采油相结合是可行的,更有利于提高油田的采收率和开发效果。

A study of combining tertiary infill development with tertiary oil recovery

Tertiary infill development is going to be carried out in domestic oilfields to bring into production of the non-producing reserves after primary and secondary well pattern thickening. The distribution of the remaining oil reserves after secondary well pattern thickening determines the nonhomogeneity of the tertiary thickened well pattern and the tertiary infill development has no independence in respect of series of strata. Tertiary oil recovery technolo-gies have made a large progress in China and their prospect of application is bright Quite some oil layers are left intact after polymer flooding, thus need to be further developed. This paper analyzes the deficiencies of tertiary infill development and tertiary oil recovery when they are separately applied, and introduces the possible methods to combine them together, which are simulated through numerical simulation. It is confirmed that combining the tertiary infill development with the tertiary oil recovery is feasible, and it is more favorable for enhancing oil recovery factor and improving development effects.