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长期以来,电缆地层测试技术被公认在流体特性、压力系统以及地层动态特性等地层相关信息的采集方面发挥着重要作用。原有技术在测试过程中需要在较长的时间内确保仪器的稳定性,而地层渗透率低、钻井时效限制、仪器粘卡等因素也会制约数据的采集。新型电缆地层测试仪能够缩短钻井时间,降低仪器粘卡风险,同时优化致密地层的预测试技术。该仪器使用新型的电动机械控制装置,可提供预测试中超低流量的精确控制,确保预测试操作按地层流体特性的需要进行定制。该仪器与标准裸眼井仪器串配接,可实现更高的工作效率。应用实例说明了该仪器在作业时间及资料质量方面的进步,尤其在超低渗透率环境下对压力数据的获取。
Cable formation testing technology has long been recognized as playing an important role in the acquisition of formation-related information such as fluid properties, pressure systems, and formation dynamics. The prior art needs to ensure the stability of the instrument for a long time in the testing process, and the factors such as low formation permeability, limitation of drilling time, sticking of instruments and the like also restrict data collection. The new cable formation tester can shorten the drilling time, reduce the risk of sticking equipment, while optimizing the pre-test technology of tight formations. The new electromechanical control unit is used to provide precise control of ultra-low flow during pre-test, ensuring pre-test operation is tailored to the needs of formation fluids. The instrument and the standard open-hole instrument string matching, can achieve higher work efficiency. The application example shows the improvement of operation time and data quality of the instrument, especially the acquisition of pressure data in ultra-low permeability environment.