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大庆油田七厂四矿持续开展外围低渗透油田周期注水实验和高关间抽试验,取得了“两降一提高”的好效果。大庆外围油田开发开采过程中,自然递减率高、综合递减率高,产量下降速度快,严重制约了油田中后期的开发与调整。七厂四矿针对这一情况,从2001年开始持续开展外围低渗透油田周期注水实验,先后对96口注水井实施了周期注水技术,对37口高含水井进行高关及间抽处理,改善了水驱效率,有效地降低了外围低渗透油田含水上升速度和产量下降速度,提高了油层的动用程度,累计减少产水234467立方米,累积增油14567吨。
The fourth coal mine of Seventh Factory in Daqing Oilfield continued to carry out the periodic water injection test and the high-closing pumping test in the peripheral low-permeability oilfield, and achieved the good result of “two drops and one increase”. In the process of exploitation and exploitation of the peripheral oil fields in Daqing, the natural decline rate is high, the comprehensive decline rate is high, and the output declines rapidly, which severely restricts the development and adjustment of the mid-late period of the oilfield. In response to this situation, Qichang No.4 Mine has carried out periodic waterflooding experiments on peripherally permeable low permeability oilfields since 2001. It implemented periodic waterflooding technology for 96 water injection wells and conducted high-and-off-pumping of 37 high-water-content wells to improve The waterflood efficiency effectively reduced the water cut rate and the rate of decline of output in the peripheral low-permeability oilfields, and increased the utilization of oil layers. The cumulative production of water was reduced to 2344673 cubic meters with a cumulative increase of 14567 tons.