【摘要】 致密气储层具有物性条件差、非均质性强、含水饱和度高等特点，储层中存在流体渗流受限区域，使得气井产量和控制储量受到影响。一般意义上的阻流带强调的是沉积、成岩作用，以及砂体边界发育等静态地质因素对生产的影响，缺少气水两相渗流过程中不同因素产生的动态阻流表征。首先明确了致密气储层广义平面阻流带的内涵，提出了从生产特征、储层特征和两相共渗特征三个方面进行分析。基于模糊层次分析法，建立了广义平面阻流带层次结构模型和综合评价指标（GI），以鄂尔多斯盆地某致密气藏井区为例，计算了不同因素的影响权重值，得到GI数值，通过插值绘制了研究区广义平面阻流带发育图。进一步对比研究了高产、中产、低产三类井无量纲产气量和无量纲产量递减率与GI数值的关系，结果表明：无量纲产气量与GI值呈负相关关系，无量纲产量递减率与GI值呈正相关关系。利用广义平面阻流带发育图可以为后续气井工作制度的优化调整提供科学支撑。更多还原

【Abstract】 The characteristics of tight gas reservoir can be characterized by low physical conditions, strong heterogeneity, and high water saturation. There are fluid flow restricted areas in the reservoir, which affect the production and controlled reserves of gas wells. In general, the blocking zone emphasizes the impact of static geological factors such as sedimentation, diagenesis, and the development of sand body boundaries on production, lacking the dynamic flow resistance characterization generated by different factors in the gas-water two-phase flow process. The paper first clarifies the connotation of the generalized horizontal blocking zone in tight gas reservoir, and proposes an analysis from three aspects: production characterization, reservoir characteristics, and heterogeneous co flow characteristics. Based on the fuzzy analytic hierarchy process, a hierarchical structure model and comprehensive evaluation index(GI) for the generalized horizontal blocking zone were established. Taking a well area of tight gas reservoir in Ordos Basin as an example, the weight values of different factors were calculated to obtain the GI values. The distribution map of the generalized horizontal blocking zone in the study area was drawn through interpolation. Further comparative studies were conducted on the relationship between dimensionless gas production, dimensionless production decline rate, and GI value in three types of wells with high, medium, and low production. The results showed that there was a negative correlation between dimensionless gas production and GI value, and a positive correlation between dimensionless production decline rate and GI value. The use of a generalized horizontal blocking zone distribution map can provide scientific support for the optimization and adjustment of subsequent gas well production.更多还原