论文部分内容阅读
低渗透气藏如果压裂后配产不合理,将导致出砂、裂缝闭合等不利情况,达不到增产的目的。综合考虑影响低渗压裂气井出砂产量的各方面因素,运用质点动力学的方法,建立了裂缝中存在压裂砂情况下的临界气流速度公式,只要气井产量小于该临界产量就不会破坏裂缝中的支撑砂粒,能使裂缝保持长期的有效性。得出裂缝宽度、裂缝高度、支撑剂砂粒直径、支撑剂砂粒密度及气体密度是影响压裂气井产量的因素。研究了保持压裂裂缝导流能力的最大生产产量的确定方法,能使裂缝保持长期的有效性,为矿场的合理生产奠定基础。通过对Cq气田某井的计算分析,表明所建立的模型是正确合理的。
Low-permeability gas reservoirs with irrational distribution after fracturing will lead to unfavorable conditions such as sand production and crack closure, and will not reach the goal of increasing production. Considering various factors affecting sand production in low permeability fracturing gas wells, the critical velocity formula in the presence of fracturing sand is established by using the particle dynamics method. As long as the output of the gas well is less than the critical yield, it will not be destroyed Crack in the support of sand, make cracks maintain long-term effectiveness. It is concluded that the width of fractures, fracture height, proppant grit diameter, proppant grit density and gas density are the factors influencing the production of fractured gas wells. The method of determining the maximum production capacity to maintain the flow conductivity of fracturing fissures is studied, which can make the fractures maintain the long-term effectiveness and lay the foundation for the reasonable production of the mine. Through the calculation and analysis of a well in Cq gas field, it shows that the established model is correct and reasonable.