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水平井目前已越来越多地被应用到低渗油气藏开采中,由于低渗油气藏连通性差,压力传导慢,为保证水平井开发效果,达到提高气藏产能和最终采收率的目的,仍然需要进行压裂保证井筒沟通更多的储层,而且水平井往往需要采用多段横切裂缝的改造方法方可达到好的增产效果。裂缝参数是影响水平井产能的重要因素,本文综合考虑了裂缝缝长、裂缝条数、渗透率、孔隙度等影响因素对压后产量的影响,通过X井地层数据进行数值模拟,对苏里格气田水平井裂缝参数进行了优化设计,研究表明:模拟水平井压裂后产能与施工实际产量比较一致,具有较好的适用性。
Horizontal wells are increasingly being applied to the exploitation of low permeability reservoirs. Due to the poor connectivity and slow pressure transmission in low permeability reservoirs, horizontal wells have been developed to ensure the development of horizontal wells and achieve the goal of improving gas reservoir productivity and ultimate recovery , There is still a need for fracturing to ensure that the wellbore communicates with more reservoirs, and that horizontal wells often need to be modified with multi-section transverse fractures to achieve good stimulation results. The fracture parameters are the important factors that affect the horizontal well productivity. In this paper, the influences of factors such as fracture length, fracture number, permeability and porosity on the post-compression yield are comprehensively considered. Through the numerical simulation of X-ray formation data, The fracturing parameters of the horizontal well in the gas field are optimized. The results show that the productivity after fracturing of the simulated horizontal well is consistent with the actual output of the construction and has good applicability.