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针对该区块生产气井已进入中后期,部分井处于停产或关井恢复压力状态,对老井提出了调层压裂的要求,开展了老井调层压裂技术研究,现场压裂试验效果明显,阻止了该区块产量无限递减,可以减少部分建井数。该区块老井调层压裂困难重重,地层能量不足,原产层对目的层的影响等,该次试验为后续类似增产改造提供了依据和经验。
Gas wells for this block have entered the middle and late stages, and some of the wells are in the state of shutdown or shut-in and recovery of pressure. The requirements for adjusting fracturing of old wells are put forward. The research on the adjustment of fractured old wells and the effect of on-site fracturing are carried out Obviously, blocking the infinite decline in the yield of the block, you can reduce the number of wells to build. The old wells in this block have many difficulties in adjusting fractures, such as insufficient stratigraphic energy and the influence of primary strata on the target strata. This test provides the basis and experience for subsequent similar stimulation.