任丘潜山油藏开发中的增油挖潜系列技术

STIMULATION TECHNOLOGIES AND APPLYING EFFECTS IN RENQIU BURIED HIL L RESERVOIR

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。

Renqiu Buried Hill Reservoir is a double-media, bottom water, and mass ive carbonate reservoir. It has quite well-developed fracture and karst cave, an d has very high oil production at the initial stage. At the high stable producti vity and earlier decline periods, many stable production stimulation are used th at mainly include drilling adjustment well, water block and water shutoff in ord er to control bottom water coning into the well. Some integrate measures are use d at the rate quick decline period. Now, the reservoir is at the slow decline pe riod at high water cut later stage, the stimulation include decline reservoir pr essure in producing sidetracked hole, and synergistic measures that consist of w ater shutoff, acid and artificial lift. These technical measures play an importa nt role in increasing oil rate, tapping production potential and enhancing oil r ecovery, which make the reservoir increased 1277×10 4 t oil since put into pr odu ction, and supplied technical pledge for keeping high efficient development. The paper analyses all the stimulation measures and their applying effects and give s some suggestions.