裂缝孔洞储层连通溶洞模式注气效果研究

发布时间：2018-04-24 17:01

本文选题：碳酸盐岩 + 缝洞型油藏　；参考：《西南石油大学学报(自然科学版)》2017年01期

【摘要】：针对缝洞碳酸盐岩油藏主要进行自喷采油或停喷后注水替油作业,导致本体溶洞内存在大量剩余油的问题,开展了缝洞碳酸盐岩油藏注气采油开发效果的研究。对裂缝孔洞储层连通溶洞模式进行模型简化,计算分析氮气、甲烷及二氧化碳气体的注入适应性,通过物理模拟方法对该类储层进行自喷、注水及注气模拟实验,并建立了注气开发分析方法,结果表明,对于该类储层溶洞连通底水规模越大,裂缝孔洞储层物性越好,注气开发效果越差,且随注气周期增加,缝洞体的弹性能量逐渐增大。在矿场条件下,应选择上部裂缝孔洞储层物性较差,溶洞连通底水规模较小的缝洞体进行注气实践;建立弹性产率与压缩系数的线性关系式,可预测气顶体积、油水能量及周期产出量等参数,为注气效果评价提供一定依据。
[Abstract]:In order to solve the problem that a large amount of residual oil exists in a fractured carbonate reservoir, which is mainly carried out by self-injection or injection replacement after stopping injection, the research on the effect of gas injection and oil recovery in fractured carbonate reservoir is carried out. This paper simplifies the model of connected cavity model of fractured pore reservoir, calculates and analyzes the adaptability of nitrogen, methane and carbon dioxide gas injection, and carries out self-injection, water injection and gas injection simulation experiments on this kind of reservoir by physical simulation method. The analysis method of gas injection development is established. The results show that the larger the scale of connected bottom water is, the better the physical properties of fractured cavity reservoir is, the worse the gas injection development effect is, and the elastic energy of fracture cavity body increases gradually with the increase of gas injection cycle. Under the condition of mine field, the gas injection should be carried out by selecting the fractured voids with poor physical properties and small scale of connected bottom water, and the linear relation between elastic yield and compression coefficient can be established to predict the volume of gas cap. The parameters of oil and water energy and periodic output provide a certain basis for the evaluation of gas injection effect.
【作者单位】：中国石油勘探开发研究院廊坊分院;中国科学院渗流流体力学研究所;
【基金】：国家自然科学基金(51074176)
【分类号】：TE34

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