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任丘 (雾迷山组 )潜山油藏是一个缝洞十分发育的双重介质块状底水碳酸盐岩油藏 ,投产初期单井产量高达 10 0 0～ 30 0 0 t/ d。在高产稳产及产量递减阶段 ,为控制底水锥进 ,研究应用了以钻调整井、卡堵水为主的稳产技术 ;在快速递减阶段 ,重点实施了综合治理措施。目前该油藏处于高含水后期的低速递减阶段 ,主要实施了降压开采、老井眼开窗侧钻以及以堵—酸—抽为代表的挖潜技术。这些技术措施在增油、挖潜以及提高采收率方面发挥了重要作用 ,自投产以来已累计增产原油 12 77× 10 4t,为油藏持续高效开发提供了技术保证。分析了该油藏各个开发阶段所采取的一系列增油挖潜技术及其应用效果 ,对今后的挖潜工作提出了建议。
The Renqiu (Wumishan Formation) buried hill reservoir is a dual-medium massive bottom-water carbonate reservoir with well-developed fractures. In the initial production stage, the single-well production reached as high as 10 0-30 000 t / d. In the stage of high and stable yield and declining production, in order to control the bottom water coning, the steady production technology with drilling adjustment well and plugging and water plugging was applied and studied. In the stage of rapid decrease, emphasis was put on the comprehensive control measures. At present, the reservoir is in the low-descending stage of high-water-cut late stage, and mainly implements depressurization mining, side hole drilling with old wellbore and tapping technology represented by blocking-acid-pumping. These technical measures have played an important role in enhancing oil production, tapping potentials and enhancing oil recovery. Since its production, 12 77 × 10 4 t of crude oil has been accumulated, which has provided technical assurances for the sustained and efficient development of the reservoir. This paper analyzes a series of oil increasing and tapping technology and its application effect adopted in each stage of development of this reservoir and puts forward suggestions for future tapping work.