Application of elastic adhesive material in drilling fluid plugging of fractured formation in Daqing Oilfield
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摘要: 针对大庆油田深部裂缝性地层漏失严重、桥塞堵漏材料堵漏效果不佳的问题，引入了弹性体型胶粘材料，与桥塞堵漏材料复配，形成了热塑性复合堵漏技术，室内实验表明该技术可抗温160 ℃，承压5 MPa，封堵4 mm内裂缝。在大庆油田25口深井中进行了现场试验和应用，现场数据表明热塑性复合堵漏技术较桥塞堵漏技术堵漏效果更佳，堵漏成功率100%，承压7.5 MPa，未发生由于恶性漏失导致提前完钻的情况。Abstract: In view of the serious leakage and poor plugging effect of bridge plug plugging materials in deep fractured formations of Daqing Oilfield, the thermoplastic composite plugging technology was formed by introducing elastic adhesive materials and mixed with bridge plugging materials. Laboratory tests were carried out in 25 deep wells of Daqing Oilfield. The results show that the thermoplastic composite plugging technology has better plugging effect than that of the bridge plugging technology. The plugging success rate is 100%, the pressure-bearing is 7.5MPa, and finishing drilling ahead of schedule due to vicious leakage has not been occurred.
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