姬塬油田套损井隔水采油技术研究与应用

姬塬油田由于多年开发，油田综合含水逐渐上升，井筒腐蚀日趋严重，套损井数量不断增加，造成姬塬油田部分油藏注采井网失控、水驱动用程度降低、剩余油未能有效开采等问题，直接影响油水井正常生产及油田稳产，同时也给姬塬油田造成了巨大的经济损失。一方面，开展对Y211、Y341和桥塞等常规机械隔采工具进行原理分析和现场应用效果对比研究工作，得出其现场应用的缺陷性；另一方面，针对常规隔采工具的缺陷性，开展LEP长效封隔器隔采技术和软金属套管补贴技术研究与试验工作。通过研究及试验不同类型机械隔采工具的优缺点和适用范围，得出在不同工况下的套损井应用机械隔采工具治理套损井的有效措施，为姬塬油田套损井的治理及后期的稳产提供有力的技术支撑。

Research and Application of the Water Isolation Technology for Casing Damage in Jiyuan Oilfield

With the development of the Jiyuan Oilfield for many years, the comprehensive water of the oilfield has gradually increased, the wellbore corrosion has become serious, and the number of the casing damage well has increased year by year. Because of the well casing damaging, the injection-extraction well pattern is out of control、the use of water drive degree is reducing, and the remaining oil is not producted effectively. The wells is not mined normally and oil fields is also not mined stablely, which causes huge economic losses in the Jiyuan oilfield. Therefore, how to govern the wells effectively, has become an important task in Jiyuan Oilfield. In this paper, on the one hand, the principle analysis and the effect comparison for field application of Y211, Y341 and bridge plug are firstly obtained, and aslo the defect of field application is got. On the other hand, the LEP long-term isolation packer and the soft metal casing subsidy tool are carried out for solving the problem of the conventional isolation tools. Through the advantages and disadvantages and practical range of different types of mechanical isolation tools are summarized, the effective measures for treating casing loss wells with mechanical isolation tools under different working conditions are obtained. It provides a direction for governing casing damage wells in Jiyuan Oilfield.