敏感性油藏油层保护技术的研究与应用

Study and Application of Formation Protection Technology for Sensitive Oil Reservoir

针对龙南油田滚动开发过程中暴露出油井热洗后产量下降幅度大、水井注水压力上升快、注水难度大的矛盾,开展了油层保护技术研究。以渗透率伤害率为目标,筛选保护液类型;通过多项实验对比分析,筛选最优施工工艺。并在滚动开发实践中加以应用,取得了一些认识,对同类低渗透敏感性油藏高效开发具有一定的经验借鉴。

The study of oil formation protection technology is made for settlement of the issues arising from the progressive development of Longnan Oil Field, such as production declining dramatically after heat washing of the well, water injection pressure of the water well rising rapidly and water injection becoming increasingly difficult. Aiming at the permeability damage rate, the effort is made for picking out the types of protection liquid. The most suitable operational process is located after analysis and comparison based on a number of experiments. Application of the protection technology for progressive development results from some experiences can be borrowed in effective development of the same low-permeability sensitive oil reservoirs.