陈存良, 马奎前, 王相, 岳红林, 吴晓慧. 基于最大注水效率的平面均衡驱替方法[J]. 石油钻探技术, 2021, 49(3): 124-128. DOI: 10.11911/syztjs.2021028
引用本文: 陈存良, 马奎前, 王相, 岳红林, 吴晓慧. 基于最大注水效率的平面均衡驱替方法[J]. 石油钻探技术, 2021, 49(3): 124-128. DOI: 10.11911/syztjs.2021028
CHEN Cunliang, MA Kuiqian, WANG Xiang, YUE Honglin, WU Xiaohui. Research on the Planar Equilibrium Displacement Based on Maximum Water Injection Efficiency[J]. Petroleum Drilling Techniques, 2021, 49(3): 124-128. DOI: 10.11911/syztjs.2021028
Citation: CHEN Cunliang, MA Kuiqian, WANG Xiang, YUE Honglin, WU Xiaohui. Research on the Planar Equilibrium Displacement Based on Maximum Water Injection Efficiency[J]. Petroleum Drilling Techniques, 2021, 49(3): 124-128. DOI: 10.11911/syztjs.2021028

基于最大注水效率的平面均衡驱替方法

Research on the Planar Equilibrium Displacement Based on Maximum Water Injection Efficiency

  • 摘要: 针对现有平面均衡驱替评价方法未定量考虑油藏非均质性的问题,基于注采井间动态驱替方程,并考虑油藏的非均质性,建立了注水效率与累计产油量之间的关系方程,以实现注水效率最大化为目标。然后,通过求导的方式得到了平面均衡驱替的特征条件,并以此为基础形成了平面均衡驱替注采结构调整方法。研究认为,均质油藏均衡驱替的特征条件是,各注采方向的注水量与孔隙体积的比相同;非均质油藏均衡驱替的特征条件是,平面各注采方向注水量与孔隙体积的比满足线性差异关系。海上BZ油田利用平面均衡驱替法调整注采结构后,日产油量增加155 m3,有效改善了开发效果。研究结果表明,基于最大注水效率的平面均衡驱替方法可用于指导油藏平面注采结构的调整。

     

    Abstract: The existing planar equilibrium displacement evaluation method does not quantitatively consider the heterogeneity of the reservoir. For that reason, a new equation describing the relationship between water injection efficiency and cumulative oil production was built based on the dynamic displacement equation between injection and production wells with consideration of reservoir heterogeneity. The goal was to maximize water injection efficiency. The characteristic conditions of planar equilibrium displacement were obtained by derivation, on which the adjustment method for the injection–production structure of planar equilibrium displacement was developed. It is considered that the characteristic condition of equilibrium displacement in homogeneous reservoirs was that the ratios of injection volume to pore volume in all injection–production directions were the same; while that of equilibrium displacement in heterogeneous reservoirs was that the mentioned ratios in all injection–production directions were in a linear difference relationship. After adjusting the injection–production structure in the offshore BZ Oilfield by the planar equilibrium displacement method, the daily oil production increased by 155 m3, indicating the largely improved development effect. The results demonstrate that the planar equilibrium displacement method based on maximum water injection efficiency can be used guide the adjustment of the reservoir planar injection-production structure.

     

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