论文部分内容阅读
安塞油田随着开发时间推进，老井出现低液面、低流压、采液和采油指数下降、综合含水上升、产量递减率增大、裂缝主向油井与侧向油井压力差异大等日益突出的矛盾，这直接影响油田开发效益和最终采收率，对油田稳产造成严重威胁。作为特低渗透油层改造进攻性措施之一的重复压裂改造技术，面临着如何提高特低渗透油田经济效益的技术难题。文中较系统地分析安塞油田重复压裂改造工艺和压裂效果，阐述影响油井产量降低的各种因素，找出油井重复压裂改造工艺技术存在的难题，明确低渗透油层重复压裂技术发展方向，为今后提高安塞特低渗透油田重复改造提出了具体目标。
With the development of Ansai Oilfield, the old wells show low liquid level, low flow pressure, decreased production and oil recovery index, combined water cut, increased production decline rate, large difference in pressure between the main fracture and the lateral well Outstanding contradictions, which directly affect the oilfield development benefits and ultimate recovery, a serious threat to the stable production of the oil field. As one of the aggressive fracturing technologies for retrofitting ultra-low permeability reservoirs, it is facing the technical challenge of how to improve the economic benefits of ultra-low permeability oilfields. This paper systematically analyzes the Ansai Oilfield repeated fracturing reformation and fracturing effect, expounds the various factors that affect the oil well production reduction, find out the problems existing in the oil well repeated fracturing reformation technology, clarifies the development of the low permeability reservoir fracturing technology Direction, for the future improvement of Ansai low permeability oilfield repeated transformation set specific targets.