Reservoir Evaluation and Development ›› 2020, Vol. 10 ›› Issue (6): 85-89.doi: 10.13809/j.cnki.cn32-1825/te.2020.06.013

• Field Application • Previous Articles     Next Articles

Well pattern adjustment for heterogeneous composite flooding in Ⅳ1-3 reservoir in Shuanghe Oilfield

ZHANG Lianfeng1,2(),LIANG Limei1,2,XUE Guoqin1,2,LONG Weijiang1,2,SHEN Naimin1,2,ZHANG Yilin1,2,ZHANG Xiaojing1,2   

  1. 1.Petroleum Exploration and Development Research Institute, Sinopec Henan Oilfield, Nanyang, Henan 473132, China
    2.Henan EOR Key Laboratory, Nanyang, Henan 473132, China
  • Received:2020-08-31 Online:2021-01-07 Published:2020-12-26

Abstract:

The heterogeneous composite flooding has been proved to be an effective development technology to greatly improve oil recovery after polymer flooding, and the reasonable well pattern adjustment is the main method to improve the performance of heterogeneous composite flooding. By numerical simulation, the well pattern form, well spacing and flow line transformation angle of well pattern adjustment in Ⅳ1-3 reservoir of Shuanghe Oilfield have been systematically studied, and the comprehensive comparison and demonstration have been carried out from technical and economic aspects. The results show that the viscosity ratio of injection system to crude oil and the heterogeneity of formation have a decisive influence on the adjustment effect of well pattern flow line. For Ⅳ1-3 reservoir of Shuanghe Oilfield, on the premise of making full use of the old wells, the adoption of five points well pattern and well spacing of 150 ~ 300 m, and the great adjustment of the flow line angle can further improve the performance of heterogeneous composite flooding in decreasing water cut and increasing oil production.

Key words: well pattern type, injection-production well spacing, flow line transformation, numerical simulation, heterogeneous composite flooding

CLC Number: 

  • TE319