光纤探针-阻抗三相流测井仪在三相流中的试验及分析

Experiment and Analysis of Fiber Optical Probe Impedance Three-phase Flow Logger in Three-phase Flow

为满足产出油井对三相流测井仪器总流量测量范围宽、气量测量范围宽、高含水下测量精度高且环保的需要,设计并研制了光纤探针-阻抗三相流测井仪。该仪器由光纤探针、阻抗含水率计和涡轮流量计组合,采用光纤探针测量气相响应、阻抗含水率计测量含水率、涡轮流量计测量总流量响应。仪器通过模拟井标定建立各参数在三相流下的响应图版,总结出响应图版之间的交绘关系,形成解释方法。对仪器进行了现场试验,验证了重复性、一致性及适用性。在三相流井中,光纤探针-阻抗三相流测井仪与两相流测井仪器进行了对比试验。试验分析表明,仪器重复性、一致性及适用性非常好,对油气水三相流的定量测量,较两相流测量结果能更准确地给出产层的产液和含水率情况。

In order to meet the needs of a three-phase flow logging instrument with wide measuring range of total flow,wide measuring range of gas,high precision and environmental protection under high water cut,a fiber optic probe-impedance three-phase flow logging instrument was designed and developed.The instrument was composed of optical fiber probe,impedance moisture content meter and turbine flowmeter.The gas phase response was measured by optical fiber probe,water content was measured by impedance moisture content meter,and total flow response was measured by turbine flowmeter.Based on calibration via simulating well,the response charts of each parameter under three-phase flow was established,and the cross plotting relationship among the response charts was obtained to form an interpretation method.The repeatability,consistency and applicability of the instrument were verified by field test.In the three-phase flow well,the comparison test between the three-phase flow logging instrument and the two-phase flow logging instrument is carried out,and the accuracy of the instrument is verified.The experimental analysis shows that the instrument has good repeatability,consistency and applicability.Compared with the two-phase flow measurement results,the quantitative measurement of three-phase fluid of oil,gas and water can give more accurate information of the liquid production and water cut of production layer.