水驱气藏型储气库储集空间动用率实验评价

发布时间：2018-04-03 16:30

本文选题：水驱气藏型储气库　切入点：储集空间动用率　出处：《石油钻采工艺》2017年04期

【摘要】：水驱气藏型储气库高速注采气运行过程中伴随水体往复运移,建库储层地质条件和水体渗流特征对储气库储集空间动用效率影响较大。针对国内典型水驱气藏储气库储层特征,开展周期注采模拟饱和度场、核磁共振分析等实验。将物理模拟结果与数值模拟相结合,通过多方案对比分析注采参数,并利用相似准则转换为矿场指标。研究结果表明:水驱气藏型储气库多周期注采运行过程中,出现部分储集空间未动用的现象,三维饱和度场和核磁特征谱表明气驱纯气带是提高空间动用的主力区,而气水过渡带是导致储气库空间动用效果变差的主要区域,排驱扩容、气水互锁作用效果与储气库的注采速度和储集空间物性分区密切相关;对于华北典型水驱气藏型储气库多周期注采运行而言,在注气速度为291×10~4 m~3/d、采气速度为533×10~4 m~3/d时,26%库容为无效库容。研究结果为水驱气藏改建储气库及优化注采运行提供参考。
[Abstract]:In the process of high speed gas injection and production of water drive gas reservoir, the geological conditions of reservoir and seepage characteristics of water body have great influence on the production efficiency of gas storage space.In view of the reservoir characteristics of typical water-drive gas reservoirs, experiments such as periodic injection and production simulation saturation field and nuclear magnetic resonance analysis were carried out.The physical simulation results are combined with the numerical simulation, and the injection and mining parameters are analyzed by comparison of multiple schemes, and the similarity criterion is used to convert them into mine field indexes.The results show that during the operation of water-driven gas reservoir with multi-period injection and production, some reservoir space is not used. The three-dimensional saturation field and nuclear magnetic characteristic spectrum show that the gas-driven pure gas belt is the main area to improve the space production.The gas-water transition zone is the main area that leads to the deterioration of the space production effect of gas storage. The effect of displacement expansion and gas-water interlocking is closely related to the injection and production speed and the physical property of reservoir space.For the multi-period injection-production operation of typical water-driven gas reservoirs in North China, when the gas injection rate is 291 脳 10 ~ (4) m ~ (-1) m ~ (3 / d) and the gas recovery rate is 533 脳 10 ~ (4) m ~ (-1) m ~ (3 / d), 26% of the reservoir capacity is invalid.The results provide a reference for rebuilding gas reservoir and optimizing injection-production operation in water drive gas reservoir.
【作者单位】：中国矿业大学(北京);中国石油勘探开发研究院廊坊分院;中国石油天然气集团公司油气地下储库工程重点实验室;
【基金】：国家科技重大专项“致密砂岩气有效开发与评价技术”(编号:2011ZX05013-002)
【分类号】：TE82

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