低渗致密气藏压裂水平井产能预测新方法

发布时间：2018-08-07 09:05

【摘要】：压裂水平井是有效开发低渗致密气藏和页岩气藏的主要手段,压裂水平井产能是决定非常规气藏开发成败的关键技术指标。但目前能够经济、快速地获得低渗致密气藏压裂水平井产能的方法很少。基于此,采用理想模型与数值模拟相结合的方式,得出了一种能快速评价低渗致密气藏压裂水平井产能的新方法。根据我国低渗透致密气藏的地质特点,建立了单井数值模拟模型。设计了8组16次正交试验,并对其进行了修正等时试井数值模拟。模拟结果表明,储层渗透率和储层有效厚度是影响气井产能的2个主要因素,并建立了不同裂缝条数的压裂水平井的二项式产能方程系数A和B与地层系数的经验关系。通过实例验证,该方法具有计算简单、适用性强、结果可靠的特点,能够节省大量时间和成本,适合现场快速评价应用。
[Abstract]:Fractured horizontal wells are the main means to effectively develop low permeability and tight gas reservoirs and shale gas reservoirs. The productivity of fractured horizontal wells is the key technical index to determine the success or failure of unconventional gas reservoirs. However, there are few methods to quickly obtain the productivity of fractured horizontal wells in low permeability and tight gas reservoirs. A new method that can quickly evaluate the productivity of fractured horizontal wells in low permeability and tight gas reservoirs is obtained. According to the geological characteristics of low permeability and tight gas reservoirs in China, a single well numerical simulation model is set up. 8 sets of 16 orthogonal experiments are designed, and the numerical simulation of the well test number is modified. The simulation results show that the reservoir permeability and reservoir are stored in the reservoir. The effective thickness of the layer is the 2 main factor affecting the productivity of the gas well, and the empirical relationship between the binomial productivity equation coefficient A and the B and the formation coefficient of the fractured horizontal wells with different crack numbers is established. It is proved by an example that the method has the characteristics of simple calculation, strong applicability and reliable results, which can save a lot of time and cost and fit the site. Rapid evaluation of the application.
【作者单位】：中国地质大学(北京)能源学院;
【分类号】：TE357

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