Rapid analysis for net-pressure curve of acid-fracturing well

Well testing is an important part of evaluating fracturing and acidizing effects.Conventional G function method is inefficient with unobvious curve features.Net-pressure rapid analysis technology can analyze more quickly and efficiently net-pressure curve during acid fracturing in order to obtain the key fracturing parameters.According to the seepage problem existing in acid-fracturing well,using seepage theory and modern well-testing interpretation,this paper establishes a mathematical model for rapid evaluating net-pressure of acid-fracturing well,calculates typical bottomhole pressure response curve by Stehfest inversion,and analyzes the effects of wellbore storage factor,skin factor and fracture length on bottomhole pressure dynamics.Through the established analysis theory,the measured data of Yubei 1 well is processed and better interpretation result has been obtained.It plays an important role in raising the accuracy and efficiency of fracture diagnosis for acid-fracturing well in carbonate reservoir.