裂缝性碳酸盐岩储气库注采渗流规律实验研究

发布时间：2018-01-06 04:03

本文关键词：裂缝性碳酸盐岩储气库注采渗流规律实验研究　出处：《中国科学院研究生院(渗流流体力学研究所)》2015年硕士论文　论文类型：学位论文

【摘要】：裂缝性碳酸盐岩储气库储层具有双重结构特征,流体渗流复杂,研究难度大。目前裂缝性碳酸盐岩储气库的注采渗流物理模拟主要从宏观和微观两方面开展研究。论文以华北S裂缝性碳酸盐岩储气库为研究对象,开展储层微观储层特征、气水交互驱替渗流机理及储气库多周期注采运行仿真物理模拟研究,揭示气水高速渗流机理及影响气库高效运行的主控因素。最终根据渗流机理研究结果复核优化S气库库容参数。1、通过对比分析毛细管压力曲线与核磁共振T2谱分布,研究碳酸盐储集空间孔喉发育特征；基于非稳态法气水相对渗率测试曲线,分析碳酸盐微裂缝储层气水两相渗流特征。研究结果表明,华北S碳酸盐储层微裂缝发育、孔隙细小且分布集中。不同层位气相渗流特征差异较大。2、华北S气藏构造裂缝发育、储层非均质性强,在很难钻取真实反映裂缝发育的双重介质储层特征条件下,通过对天然基质岩心剪切造缝实现实验材料的仿真。气水相渗实验研究表明：裂缝性储层相渗曲线近似X型,多轮次气水互驱实验后相渗曲线变化较小。基质岩心相渗曲线多次气水互驱后共渗区间变窄,共渗点降低。微裂缝对储层孔隙空间贡献率较大,微裂缝发育储层孔隙空间利用率保持在较高水平,基质储层含气孔隙空间利用率逐渐降低并趋向稳定。3、根据气藏改建储气库前纵向气水分布特征将储层分纯气带和气水过渡带,对上述两个区带分别开展注采气速度和水侵程度敏感性实验。注采仿真模拟结果表明：注采气速度是影响建库孔隙空间动用率的主控因素,渗流速度越大,孔隙空间动用率越低。过渡带由于贾敏效应、绕流等影响,储层形成一定的死空间,损失部分气体,储气库动用效果明显降低,水侵对岩心基质影响更明显。
[Abstract]:The fractured carbonate reservoir reservoir has a dual structure, the fluid flow is complex, difficult to study. The fractured carbonate gas storage injection flow physical simulation mainly from the macro and micro two aspects to carry out research in North China S fractured carbonate reservoir as the research object, carry out the reservoir microscopic reservoir the characteristics of water flooding, gas interaction mechanism of percolation and gas storage in multi cycle injection simulation and physical simulation research, reveals the main control factors of gas reservoir and efficient operation of the high-speed water seepage mechanism and influence. Finally according to the research results of complex flow mechanism of gas storage capacity of S kernel optimization parameter.1, through the comparative analysis of pressure curve and magnetic resonance T2 the spectral distribution of capillary of carbonate reservoir space, pore throat characteristics; relative leakage rate test curve of non steady state method based on the analysis of micro gas water, carbonate fractured reservoir gas water two-phase flow characteristics. The results show that the North China S carbonate micro fracture reservoir, small porosity and concentrated. Different layers of gas phase flow characteristics of different.2, the fractures of North China S gas reservoir, reservoir heterogeneity and reservoir characteristics in dual medium condition is very difficult to drill a true reflection of the cracks, the natural matrix core shear fracture simulation experimental materials. Experimental results show that gas phase permeability of fractured reservoir relative permeability curve approximate X, multiple rounds of water gas mutual flooding experiments after phase permeability curve changes smaller. Matrix core relative permeability curves of several water gas mutual infiltration after flooding interval narrowing, infiltration point decreased. The larger rate of micro cracks on reservoir pore space, micro fracture reservoir pore space utilization rate is maintained at a high level, medium gas reservoir pore space utilization rate decreased gradually and tends to be stable.3, according to the gas reservoir gas storage reconstruction before the longitudinal Gas water distribution characteristics of the reservoir is divided with pure gas and gas water transition zone, respectively carry out injection and production gas velocity and water invasion degree sensitivity experiment of the two zones. The simulation results show that the injection injection rate of gas production is the main controlling factor of building the pore space utilization rate, flow velocity increasing, the pore the use of space. The lower the rate of transition zone due to the Jia Min effect, flow effect, reservoir formation of dead space, part of the loss of gas, gas storage to significantly reduce the effect, influence of water invasion on core matrix is more obvious.

【学位授予单位】：中国科学院研究生院(渗流流体力学研究所)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE972;TE312

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