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水力压裂作为低渗透油气田增储上产的首选措施,在稳产高产和新油气田勘探开发中发挥着日益重要的作用。压裂设计、施工材料和施工参数的选取是影响水力压裂成效的关键因素。在储层特征与裂缝几何尺寸相同的条件下,压裂井的增产效果及其生产动态取决于裂缝的导流能力,压裂设计、施工材料和施工参数的选取是围绕如何创造长期有效的支撑裂缝而开展工作。如何预测和模拟压裂后的裂缝导流能力及其在生产过程中的变化是进行压裂设计、施工材料和施工参数选取的重要环节。本文结合压裂后油气渗流机理,建立生产过程中裂缝内压力分布和生产动态模型,进行数值模拟,预测压裂后油气井在生产过程中裂缝内的压力分布和生产动态,用于指导并修正压裂设计、施工材料和施工参数的选取。解决这一问题具有重要的实际意义,能够解决油田上许多以往难以解决的问题。
Hydraulic fracturing, as the first choice for increasing production and reservoirs in low permeability oil and gas fields, plays an increasingly important role in stable and high yield and exploration and development of new oil and gas fields. The selection of fracturing design, construction materials and construction parameters are the key factors affecting the effectiveness of hydraulic fracturing. Under the condition of the same reservoir characteristic and fracture geometry, the stimulation effect and the production dynamic of the fracturing well depend on the conductivity of the fracture. The selection of fracturing design, construction materials and construction parameters is about how to create long-term and effective support Cracks and work. How to predict and simulate the fracture diversion ability after fracturing and its change in the production process is an important part of fracturing design, construction materials and construction parameters selection. Combining the mechanism of oil and gas percolation after fracturing, the pressure distribution and production dynamic model in the production process are established, and the numerical simulation is carried out to predict the pressure distribution and production dynamic in the fractured oil and gas well during the production process for guiding and correcting Fracturing Design, Selection of Construction Materials and Construction Parameters. Solving this issue is of great practical significance and can solve many problems that can not be solved in the oilfield in the past.