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压裂前后非自喷井的压力恢复曲线形态有所差异。通过实例 ,对非自喷井压力恢复曲线形态进行了分析 ,并对导数后期曲线上翘或下掉反映油气藏是否存在边界问题进行了研究。指出用试井资料计算的地层参数 (如裂缝半长xf、表皮系数S)是评价压裂效果的最佳参数 ,也是制订下步施工方案的重要依据。但对于测恢复曲线的井 ,产量一定要按标准达到稳定 ,且要有足够的、适当的关井时间。
Before and after fracturing non-self-injection wells pressure recovery curve shape is different. Through the example, the pressure recovery curve shape of non-self-injection well was analyzed, and the problem that the curve of late derivative was up or down to reflect the existence of boundary problem of oil and gas reservoir was studied. It is pointed out that formation parameters calculated by well test data (such as half length of fracture xf and skin factor S) are the best parameters for evaluating fracturing effect and also an important basis for formulating the next construction plan. However, for a well that measures the recovery curve, the output must be stabilized to the standard and adequate and appropriate time to close the well.