论文部分内容阅读
针对大斜度或水平气井中最常见的气-水分层流动,研究利用电磁流动成像测井判别分层流和波状流的方法。首先,分析水平或微倾圆形管道内较常见的气-水两相流型在管道截面上的特征,建立流体分布模型;其次,模拟流体分布模型的电磁流动成像测井响应,分析仿真数据特点;再次,提取仿真数据中与流体分布相关的特征参数,该参数不仅用于判定流体分布模型,而且用于计算分层流模型中的水层高度,从而求取持水率;最后,研究水平气-水两相流型在流动截面上流体分布模型的变化规律,实现气-水层流判别。仿真数据研究结果表明,用这种方法可以实现气-水层流判别和持水率求取,避免了图像重建的过程,计算简单速度较快。
Aiming at the most common gas-water stratified flow in large-scale or horizontal gas wells, a method of discriminating stratified flow and wavy flow using electromagnetic flow imaging logging is studied. Firstly, the characteristics of the common gas-water two-phase flow pattern in the horizontal or slightly tilted circular pipelines are analyzed to establish the fluid distribution model. Secondly, the electromagnetic flow imaging logging response of the fluid distribution model is simulated to analyze the simulation data The characteristic parameters related to the fluid distribution in the simulation data are extracted again. The parameters are not only used to determine the fluid distribution model, but also used to calculate the water layer height in the stratified flow model to obtain the water holding capacity. Finally, Horizontal gas - water two-phase flow pattern in the flow cross-section of the distribution of fluid changes in the law to achieve gas-water laminar flow discrimination. The simulation results show that this method can be used to determine the gas-water laminar flow and determine the water holdup, which avoids the process of image reconstruction. The calculation is simple and fast.