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由于支撑剂的返排、高含水等引起的裂缝导流能力的降低,直接导致油井产能的迅速下降。在用常规压裂充填完井的油井中,防砂筛管经常会出现因粉细砂堵塞、磨蚀等造成的损坏。本文介绍了用不固定的可固化涂敷树脂体系进行无筛管压裂充填完井的现场试验结果,并给出了详细的完井程序、难点以及经验教训等。本研究确定了树脂涂敷在支撑剂上的最佳浓度,对于最大程度地优化支撑剂之间的胶结、被涂敷的支撑剂充填之间的固结力是必要的;同时,最佳浓度的确定有利于减小支撑剂充填之间导流能力的下降。现场应用结果表明,这种不固定的可固化涂敷树脂体系有效地阻止了支撑剂和地层砂返排,保证了采油速度,显著地减少了修井作业的次数。该技术给边缘油藏油井的常规的压裂充填完井工艺提供了可供选择的方案。可不采用防砂筛管而进行完井,还能对有些没有井身限制的井段进行防砂完井。
As the proppant back row, high water cut caused by the reduction of the ability to lead a direct result of the rapid decline in production capacity. In wells filled with conventional fracturing, sand control screens often suffer from blockage, abrasion, etc. of the fine sand. In this paper, we present the field test results of a non-screenable fracturing filling and completion well with a non-fixed curable coating resin system, and give detailed completion procedures, difficulties and lessons learned. This study determined the optimum concentration of resin to be applied to the proppant and the consolidation force between the proppant packs applied was necessary to optimize the cementing between the proppant and at the same time the optimum concentration The determination helps to reduce the drop in conductivity between proppant packings. The field application results show that this unfixed curable coating resin system effectively prevents the proppant and formation sand from returning, ensures the oil recovery rate and significantly reduces the number of workover workover. This technique provides an alternative solution to the conventional fracturing and filling completion of marginal reservoir wells. No sand control screen can be used for well completion, but also for some wells without well limitation sand control well completion.