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本文从蓬莱镇组浅层气藏的储层特征入手,找出产生速敏效应的潜在因素;然后,通过实验室内的流动实验确定临界流速,并将其转换成相应的单井日产气量(气量上限)。针对开采头两天部分中、高产气井产量突降的现象,利用有效厚度和临界流速计算这些井的产量上限,结果发现,产量突降的井其产气量已超过了产量上限,而产量稳定的井其产气量小于产量上限。最后,提出了避免速敏效应的措施,控制测试和生产过程中的生产压差,使产量一直小于产量上限。
In this paper, the reservoir characteristics of shallow gas reservoirs in Penglaizhen Formation are studied to find out the potential factors that cause the speed-sensitive effect. Then, the critical flow rate is determined by the flow experiment in the laboratory and converted into the corresponding single well daily gas production Volume limit). For the first two days of production, the yield drop of high-yielding gas wells in the first two days of mining, the effective thickness and the critical flow rate were used to calculate the upper yield limit of these wells. The results showed that the gas yield of wells with sudden drop in output exceeded the upper limit of output and the output was stable Well gas production is less than the production ceiling. Finally, the measures to avoid the speed-sensitive effect are put forward to control the production pressure difference in the test and production process so that the output is always less than the output ceiling.