压控式井下电子多流测试器在大庆油田的应用

Application of down hole electronic pressure-controlled multiple flow evaluator to Daqing Oilfield

目前以地层测试器(MFE)为主的地层测试技术,需要采用上提下放管柱方式实现多次流动的开关井,不能完全满足高压油气井地层测试生产及安全环保要求。YKDL压控式智能井下电子多流测试器以开关井操作不动管柱为设计原则,采用微型电机作为驱动动力,进而控制开关机构的多次开关。其方法为控制电路按着预先设置的智能时间输出开或关的控制指令给控制单元,从而使电源的电力输出给开关控制机构,使其转动,实现开关机构的开或关。当现场情况发生变化时,地面利用水泥车环空加压,形成开关井压力码,再进行开关机构的开或关。介绍了地层测试器MFE存在的不足及新型工具的技术原理特点,主要介绍了YKDL压控式智能井下电子多流测试器的结构原理、技术特点及现场应用情况,同时指出了地层测试工具多元化发展方向。

At present, the formation test technology with the multiple flow evaluator （MFE） as the dominant, which accomplishes well opening and shutdown by hoisting up or setting down testing string, can not completely meet the requirements of the formation testing production and the safety and environmental protection for high - pressure oil and gas wells. The YKDL down hole electronic MFE for pressure -controlled intelligent wells is designed for well opening and shutdown without touehing the pipe string. Driven by micro - motors, the multiple switching of the mechanism is controlled by outputting the eommand through the circuit to the control unit aceording to the intelligent time set in advance. Then the power from the power source is outputted to the switching controlling mechanism and enables it to roll, as a result, realizing the opening or closing of the switching. When something changes in the field, annulus pressure of cementing trucks is utilized on the ground, leads to the formation of pressure codes for well opening and shutdown. Then the switehing mechanism is opened or closed, The shortcomings of MFE and the technological mechanism of new tools are introduced, in particular, the structure principle, technical features, and field application of the YKDL MFE are discussed. The diversifying development of the formation testing tools is also put forward.