论文部分内容阅读
文中针对裂缝型碳酸盐岩试井分析中出现的3种特殊现象进行了探讨。这3种特殊现象为:潮汐效应、油藏压力变化的影响及紊流效应。文中对这3种现象进行了识别,分析了它们产生的原因,并结合实例,分析了对测试数据及解释结果产生的影响。研究发现,潮汐效应对压力恢复早期(前6 h)影响较小,用早期数据作解释比较能真实地反映地层情况;测试期间由周围井生产制度变化引起的油藏压力变化对压力恢复数据有较大影响,解释前需进行校正;紊流效应使原油流入动态关系曲线在测试流量较大时发生明显弯曲。对上述3种现象的识别或校正,减小了非地层因素对测试数据的影响,使试井解释结果更能真实地反映地层参数。
In this paper, three kinds of special phenomenon appeared in well test of fractured carbonate rock are discussed. These three special phenomena are: tidal effect, reservoir pressure change and turbulence effect. The three kinds of phenomena are identified in this paper, and the reasons for their occurrence are analyzed. Combined with the examples, the influences on the test data and the interpretation results are analyzed. The study found that the tidal effect had little effect on the early 6 h of pressure recovery, and the comparison of early data could truly reflect the stratigraphic situation. The change of reservoir pressure caused by the change of production system of surrounding wells during the test had no significant effect on the pressure recovery data A greater impact on the need to be corrected before interpretation; turbulence effect of crude oil into the dynamic relationship curve significantly larger when the test flow. The identification or correction of the above three phenomena reduces the influence of non-formation factors on the test data and enables the well test interpretation results to more truly reflect the formation parameters.