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油层压裂增产效果,在许多情况下,除裂缝增产效应以外,还包括地层解堵效应和供油面积形态及井位的影响。目前压裂增产倍数的计算方法中,一般只考虑了裂缝增产效应,没有考虑解堵效应。本文综合有关情报资料,提出压裂井(垂直裂缝)增产倍数新的计算方法,此法将影响压裂增产效果的许多因素均考虑在内。文中式(4)则系压裂井增产倍数的计算式。公式中除压裂前后的S和S_f(表皮效应)值不同外,其余参数相同,因此,压裂增产效果可视作表皮效应S的变化关系。文中列有形态因子图表和计算举例。
In many cases, in addition to the effect of increasing production of fractures, the fracturing stimulation effect also includes the effects of formation plugging effect and oil supply area and the well location. At present, the calculation method of fracturing yield multiplier generally only considers the crack stimulation effect and does not consider the plugging effect. Based on the intelligence information, this paper puts forward a new calculation method for the multiplication factor of fracturing wells (vertical fractures). This method takes into account many factors that affect the effect of fracturing stimulation. Chinese (4) is the calculation of fracturing well yield multiples. In addition to the formula before and after fracturing S and S_f (epidermal effect) values are different, the rest of the parameters are the same, so fracturing stimulation effect can be seen as the epidermal effect of S changes. The article lists the form factor charts and calculation examples.