坑井介入作業（well intervention）技術の動向と今後の活用見通しについて

抄録

Well intervention is a well operation for the existing well to enhance productivity or injectivity. Today, the well activity is increased in the late life oil and gas asset and CCS/CCUS project. Thus, the demand of well intervention to existing wells is expected to increase. Slickline, wireline and coil tubing are common methodologies for well intervention purpose, and the several new technologies are developed. Digital slickline newly enable accurate depth control by downhole measurement real-time monitoring, and electrical control of downhole equipment. Wireline tractor powered intervention technology allows shifting operation, hole cleaning and milling operation. Real-time coil tubing technology enabled by fiber optic cable achieves the accurate depth control and real-time fluid pumping optimization for well stimulation operation by monitoring downhole measurement. Those new technologies contribute not only to decrease operation footprint and lead time, but also decrease operational green-house-gas emission.