The Longwangmiao Fm gas reservoirs in the Moxi tectonic structure in Sichuan Basin are characterized by deep burial, high temperature, high pressure, significant thickness, high acidic gas content, and high production rate. The perforating and slotted liner completion modes are usually applied in the area. Based on the filtration flow hypothesis, the gas filtration models of the reservoir near the wellbore have been established by the finite element method. The reservoir filtration pressure field and the gas flow velocity field are simulated, and the influence of perforation on the filtration fields is also analyzed. The simulation results show that the pressure depression cone occurs in both cases of completion mode, meaning that the filtration pressure changes nonlinearly from the supply boundary towards the wellbore. The pressure cone is more obvious in the case of perforation completion than that of the slotted liner completion. The gas flow velocity near the perforation hole is higher than that of the slotted liner opening. Two gas wells with similar physical properties and different completion modes have been selected for test analysis. When the wells are stimulated by the acidizing technique, the testing production of the perforation completion well is higher than that of the slotted liner completion well. The test results are in good accordance with the simulation model results. The filtration models of the near-wellbore area established by the finite element method provide important theoretical criteria and can be used for the selection of the optimal completion type.

四川盆地磨溪构造构造龙王庙组气藏具有埋藏深、高温、高压、厚度显着、酸性气体含量高、产量高等特点。该地区通常采用射孔和开槽衬管完井方式。基于渗流假设，利用有限元方法建立了井筒附近储层的气体渗流模型。模拟了油藏过滤压力场和气体流速场，分析了射孔对过滤场的影响。模拟结果表明，在两种完井模式下都会出现压力下降锥，这意味着过滤压力从供应边界向井筒呈非线性变化。射孔完井时压力锥比开槽衬管完井更明显。射孔附近的气体流速高于开槽衬管开口处的气体流速。选取物性相似、完井方式不同的两口气井进行测试分析。酸化改造井时，射孔完井试产高于缝衬完井。试验结果与仿真模型结果吻合较好。有限元法建立的近井区滤失模型提供了重要的理论依据，可用于最优完井类型的选择。射孔附近的气体流速高于开槽衬管开口处的气体流速。选取物性相似、完井方式不同的两口气井进行测试分析。酸化改造井时，射孔完井试产高于缝衬完井。试验结果与仿真模型结果吻合较好。有限元法建立的近井区滤失模型提供了重要的理论依据，可用于最优完井类型的选择。射孔附近的气体流速高于开槽衬管开口处的气体流速。选取物性相似、完井方式不同的两口气井进行测试分析。酸化改造井时，射孔完井试产高于缝衬完井。试验结果与仿真模型结果吻合较好。有限元法建立的近井区滤失模型提供了重要的理论依据，可用于最优完井类型的选择。选取物性相似、完井方式不同的两口气井进行测试分析。酸化改造井时，射孔完井试产高于缝衬完井。试验结果与仿真模型结果吻合较好。有限元法建立的近井区滤失模型提供了重要的理论依据，可用于最优完井类型的选择。选取物性相似、完井方式不同的两口气井进行测试分析。酸化改造井时，射孔完井试产高于缝衬完井。试验结果与仿真模型结果吻合较好。有限元法建立的近井区滤失模型提供了重要的理论依据，可用于最优完井类型的选择。