低渗透油田薄夹层压裂界限试验研究
Oil Drilling & Production Technology(2006)
Abstract
随着老油田进入中高含水开发期,由于非均质影响,纵向上潜力层与高含水层交错存在.由于夹层较薄,压裂易导致水窜,隔层遮挡作用的判断及缝高的控制显得更为重要,这也是压裂选井选层及优化设计的难点和关键.在定性研究薄夹层遮挡作用的基础上,对隔层的界限进行了试验研究,提出了一套新的压裂隔层选择方法,给出了配套的技术.现场试验27口井,打破了以往按厚度分层,夹层厚度小于4 m不能分层压裂的界限,从而拓宽了压裂选井选层的范围,尤其对高含水阶段油层改造具有重要意义.
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Key words
wells and layers selecting,thin interbed,low permeability oilfield,fracturing limit of interbed
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