It constructs a method for calculating formation pressure using earlier well test data according to long shut-in pressure restore data.
并依据长关井压力恢复资料建立了利用早期试井资料计算地层压力的实用方法。
Using Lasels analysis method of afterflow for reference, pressure build up curve of shut in well is linearized and rheological parameter is calculated.
借鉴拉塞尔的续流分析方法,将焖井恢复压力曲线线性化并计算出流变参数;
However, the water hammer pressure produced upon well shut-in will possibly exert over-high pressure on BOP, and the weak points in the well are subject to being fractured.
高含硫地质环境下钻井溢流发生时,及时关井非常重要,但关井产生的水击压力,可能使防喷器超压,而且易在井内最薄弱的环节发生压漏地层事故。
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