In 2007, Dongxin Technology Institute integrated geological data with oil recovery techniques to analyze the history of oil wells, their neighboring wells in the same block, and production performance. By utilizing optimized design software, they studied the supply and discharge relationships among the wells to determine appropriate production pressure differences and operational parameters. This approach helped increase single-well productivity by deepening the pumping depth and improving overall efficiency.
Additionally, the institute tailored downhole equipment based on specific well conditions. For wells with pump depths exceeding 1800 meters, hydraulic oil pipe anchors were installed to minimize the impact of elastic deformation on the pump’s stroke. Steel continuous sucker rods were used in combination with rod and column righting devices to reduce wear in deep pumping operations, thereby extending the production cycle of the wells.
A suspension pump was also introduced to decrease the effects of oil pipe elasticity on the pump, which enhanced pump efficiency. For wells affected by gas and sand production, sand anchors were deployed to mitigate these issues and improve production efficiency. In cases where wax buildup was significant, washing well protectors and strong magnetic wax prevention devices were implemented to reduce the impact of wax on production and extend the inspection intervals for the pumps.
From January to November 2007, a total of 49 deep pumping operations were carried out. Before the implementation of these measures, the average daily liquid production was 5.1 cubic meters, with 2.9 tons of oil and a water cut of 56.8%. The average pumping depth was 1646 meters. After the measures, the average daily liquid production increased to 11.9 cubic meters, with 3.6 tons of oil per day and a water cut of 69.7%, while the average pumping depth reached 2015 meters, an increase of 369 meters compared to before. These improvements demonstrated the effectiveness of the optimized strategies in enhancing oil well performance.
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