Hydraulic fracturing technique has become one of the most effective stimulation measures for oil or gas well. With the advancement in fracturing technique, the analysis and interpretation of fracturing pressure behavior have been used as a unique fracture testing technique. On the basis of fracturing pressure response, fluid loss coefficient, fluid efficiency, fracture length, fracture width and fracture closure time etc. can.be studied, and the fracture extension and proppant transport in fractures can be inferred qualitatively. All these are used as a guideline and basis in fracturing design, operation and effect evaluation. The method introduced in this paper is based on the method developed by Nolte et al. The widely accepted two-dimensional mathematical model and numerical technique are used, and the whole fracturing process is monitored, analyzed and calculated by a microcomputer, thus a suggestion is made on the evaluation of a fracturing job and the following design is presented. In this paper an estimation of the tenacity of rocks under the formation conditions and the continuous fracture extension by an analysis of the pressure behavior after well shut-in are also discussed preliminarily.

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