陆梁油田分子膜增注工艺技术研究

陆梁油田石南21井区属中孔、低渗、特低渗透油藏,注水井的吸水能力逐渐变差,注水压力逐渐升高,油藏欠注日趋严重,为从根本上解决这一问题,采取了分子膜增注技术来改善油藏吸水能力,提高水驱采收率的技术。现场试验结果显示,该技术改善了注水开发效果。同时,针对普通酸化解堵过程中,解堵剂处理半径小、有效期短等问题,进行了一种强穿透剂的实验研究。将强穿透酸化技术进行优化,与分子膜技术相结合,能妥善解决石南21井区的注水问题,进一步提高水驱采收率。

Research on Molecular Film Injection Technology in Luliang Oil Field

Shi’nan 21 well area in Luliang Oil Field is an oil reservoir with mesopore,low permeability and extra-low permeability,water absorption capacity of its injection wells deteriorate gradually,water injection pressure increases gradually and there is lack of water injection more and more seriously.In order to solve the problem fundamentally,adopted is molecular film water injection technology to improve its water absorption capacity and enhance its water drive recovery.Field test results show that this technology can improve water injection development effect.Aiming at such issues existing in ordinary acidizing and de-plugging process as small processing radius and short useful life of the de-plugging agent,recommended is a strong penetration agent.It is suggested that the strong penetration agent is acidized and optimized technically and applied in combination with molecular film technology to solve water injection problem and improve water flooding recovery further.