Cable Implanted Intelligent Injection Technology for Separate Injection Wells in Bohai Oilfield
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摘要:
为了解决渤海油田常规分层注水中单井测调占用平台时间长、测调效率低，以及水平井和大斜度井适应性差等问题，研究了分层注水井电缆永置智能测调技术。将温度、压力、流量等测试单元集成于智能测调工作筒中，以电缆为传输电能和数据的介质，实现地面控制多口井、多层水嘴的连续开关，实时监测井下数据，形成了一套适用于海上油田的智能测调技术。38口井的应用实践表明，采用分层注水井电缆永置智能测调技术可大幅提高测调效率，缩短作业时间和减小作业空间，解决海上大斜度井、水平井测调难题。研究认为，该技术可为渤海油田经济、高效开发提供支持。
Abstract:In order to solve the problems of excessive waste, low monitoring and adjusting efficiency, and poor adaptability in horizontal wells and highly deviated wells, which compete with conventional separate water injection techniques in the Bohai Oilfield, a cable implanted intelligent separate injection technology was studied. The test units of temperature, pressure and flowrate were integrated into the intelligent measuring/adjusting cylinder, and together with the cable, they were used as the power and data transmission medium. In doing so, they achieved remote control over multiple wells and multi-layer nozzles on the ground, and were able to establish the real-time monitoring of downhole data, thereby forming a set of intelligent monitoring and adjusting technologies suitable for offshore oilfields. The field practice of 38 wells showed that this technology could significantly improve the measurement and adjustment efficiency, save operation time and operation space, and address challenges in the measurement and adjustment of offshore highly deviated wells and horizontal wells. The study suggests that this technology can provide a technical basis for the economic and efficient development of the Bohai Oilfield.
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图 1 电缆永置智能测调技术原理示意
Figure 1. Schematic diagram of the cable implanted intelligent injection technology
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图 2 智能测调工作筒结构示意
1.下接头；2.下流量计；3.外套管；4.一体化可调水嘴；5.线路控制部；6.中心管；7.主体部；8.水嘴；9.管外压力计；10.管内压力计；11.上流量计；12.短外套管；13.上接头；14.电缆
Figure 2. Schematic diagram of the intelligent monitoring/adjusting cylinder
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图 6 智能测调工作筒耐酸试验装置
Figure 6. Acid resistance test device for intelligent measuring and adjusting cylinder
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图 7 智能测调工作筒耐微压裂、耐调剖性能试验装置
Figure 7. Mini-fracturing and profile control resistance test device for intelligent measuring/adjusting cylinder
表 1 智能测调工作筒耐酸试验结果
Table 1 Acid resistance test results of intelligent measuring/adjusting cylinder
电极材料 试验压力/MPa 试验温度/℃ 试验时间/h 检测条件 结果 现象 钛 40 25 42 通电监测 短路 电极损坏 哈氏不锈钢B 40 40 38 通电监测 短路 电极断裂 哈氏不锈钢B 40 60 36 不通电监测 正常 通讯、密封良好 哈氏不锈钢C 46 90 228 通电监测 正常 通讯、密封良好 
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表 2 智能测调工作筒耐微压裂试验结果
Table 2 Results of micro-fracturing resistance test of intelligent measuring/adjusting cylinder
压力（表A）/MPa 压力（表B）/MPa 持续时间/min 流量测试功能 压力测试功能 温度测试功能 30.2 0.3 5 正常 正常 正常 34.9 0.3 10 正常 正常 正常 40.1 0.4 20 正常 正常 正常 45.4 0.4 250 正常 正常 正常
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表 3 智能测调工作筒耐微调剖性能试验结果
Table 3 Results of fine profile control resistance test of intelligent measuring/adjusting cylinder
注入时间/
min注入速度/
（m3·h－1）水嘴开度，
%电机电流/
mA电机
状态0 5.1 100 30.9 正常 10 5.4 85.0 30.9 正常 20 5.6 70.1 30.9 正常 28 5.6 46.2 30.3 正常 35 5.4 20.0 29.5 正常 279 5.2 20.0 29.7 正常 286 0 30.2 29.8 正常 291 0 50.3 30.9 正常 296 0 70.2 30.9 正常 304 0 91.2 30.9 正常 307 0 100 30.9 正常
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