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生产测井动态监测中水平井受井身结构、井筒流动状态、重力影响等因素影响使得流动介质分布、速度分布、流体的流型、流速剖面、油水的分布状态等与垂直井有很大的不同。设计了小管径多相流实验装置,实验介质是柴油和水,设置了分别为3~60 m3/d的10种流量,含水率变化范围10%~100%;分别为85°、88°、90°、92°、95°等近水平状态下的5个角度对阻抗传感器进行了实验。实验结果表明,流量大于10 m3/d时的流型是分相的泡状流,阻抗的相对响应不受角度的影响,响应规律与垂直井类似;流量低于10 m3/d时的流型是层流,阻抗的相对响应同时受到流量、含水率、角度的影响,在同一角度下受流量和含水率的影响;受油水滑脱现象影响,低流量下的相对响应高于高流量的,持水率高于含水率;受角度的影响,在90°、92°、95°时输出的相对响应出现了向下的趋势,85°、88°时输出的相对响应出现了向上的趋势。实验传感器是仪器短节,排除了集流伞漏失对流体流型的影响,完全反映流体在传感器内流道的真实流动状态,高速摄像机记录了流体随流量和含水率的变化。
The horizontal well in production logging dynamic monitoring is affected by wellbore structure, wellbore flow status and gravity influence and other factors make the distribution of flow medium, velocity distribution, fluid flow pattern, velocity profile, oil and water distribution and so on have a great different. A small-diameter multi-phase flow experimental device was designed. Diesel oil and water were used as the experimental medium. 10 kinds of flow rates of 3 ~ 60 m3 / d were set respectively. The water content ranged from 10% to 100% , 90 °, 92 °, 95 ° near the level of the state of the five angles of the impedance sensor experiments. The experimental results show that the flow pattern at a flow rate of more than 10 m3 / d is a bubbly flow in a phase separation. The relative impedances of the impedances are not affected by the angle. The response law is similar to that of a vertical well. When the flow rate is less than 10 m3 / d, Is the laminar flow, the relative response of the impedance is affected by the flow rate, water content and angle at the same time, and is affected by the flow rate and water content at the same angle. The relative response under the low flow rate is higher than that under the high flow rate due to the oil slipping phenomenon The water rate is higher than the water content; under the influence of angle, the relative response of the output has a downward trend at 90 °, 92 ° and 95 °, and the relative response of the output shows an upward trend at 85 ° and 88 °. The experimental sensor is a short section of the instrument, which excludes the influence of the leakage of the collecting umbrella on the flow pattern of the fluid and completely reflects the true flowing state of the fluid in the flow passage inside the sensor. The high-speed camera records the change of the fluid with the flow rate and the water content.