高含水油藏井网重组与二元驱复合增效——以南襄盆地双河油田Ⅳ5—11层系为例

doi:10.11743/ogg20120116

Abstract

Abstract:

It is difficult to significantly enhance oil recovery of reservoirs with high water-cut at late production period.This paper presents a successful example to demonstrate the effectiveness of integrating well pattern rearrangement with binary combination flooding in Shuanghe oilfield.Based on the overlap of pay zones and differences of their petrophysical properties,as well as the large vertical production performance variation from one pay zone to the another,we rearranged the well pattern through layer series subdivision and recombination in similarity principle,adjusted injection & production system and designed horizontal infill wells.According to the characteristics of the reservoirs and balancing economic benefits,binary combination flooding was carried out in the major pay zones while water flooding adjustment was performed in the other non-major pay zones.The injection parameters of binary combination flooding were optimized by using the orthogonal design method.Study results indicate that this technique can improve the recovery factor greatly,with amplitude of 2.19[WTXT]%[WTBZ] higher than the sum of well pattern rearrangement and binary combination flooding.

Key words: well pattern rearrangement, binary combination flooding, recovery factor, high water-cut oil reservoir, Shuanghe oilfield

CLC Number:

TE341

Ai Jingxu, Zhou Shengyou, Ma Yan, Xiao jian, Dai Yahong, Li Hongsheng, Hui Guanzhou. Study on effectiveness of integrating well pattern rearrangement with binary combination flooding in oil reservoirs with high water-cut: an example from the IV5-11 layers in Shuanghe oilfield,the Nanxiang Basin[J]. Oil & Gas Geology, 2012, 33(1): 129-134.

References

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Study on effectiveness of integrating well pattern rearrangement with binary combination flooding in oil reservoirs with high water-cut: an example from the IV5-11 layers in Shuanghe oilfield,the Nanxiang Basin

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