In 2007, Dongxin Technology Institute integrated geological data and oil recovery techniques to conduct a comprehensive analysis of oil well history, adjacent wells within the same block, and corresponding production data. By using optimized design software, they refined the supply and discharge relationships among oil wells, determining suitable production pressure differentials and operational parameters. This approach helped increase pumping depth and enhance the productivity of each individual well.
Additionally, the institute optimized rod pumps and downhole tools based on specific well conditions. First, for oil wells with pump depths exceeding 1800 meters, hydraulic oil pipe anchors were installed to minimize the impact of pipe elasticity on the pump’s stroke. Second, steel continuous sucker rods were used in conjunction with rod and column alignment devices, reducing wear in deep pumping operations and extending the production cycle of the wells.
Third, suspension pumps were introduced to reduce the effects of pipe elasticity on the pump performance, thereby improving overall pump efficiency. Fourth, for wells affected by gas and sand production, sand anchors were deployed to mitigate the negative impacts of gas and sand, thus enhancing the efficiency of single-well production. Lastly, for wells experiencing severe wax buildup, measures such as washing well protectors and strong magnetic wax prevention devices were implemented to reduce the effects of wax formation on production and extend the inspection intervals of the oil pumps.
Between January and 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%. The average pumping depth reached 2015 meters, with an average increase of 369 meters in depth. These improvements demonstrated the effectiveness of the optimization strategies applied.
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