中原油田低渗气藏压裂工艺

针对中原油田气井储层压力低、射孔井段长、部分井井况差等问题,进行适应储层特点的增产工艺研究,以改善气藏的开发效果.在工艺方面,优化压裂设计施工参数和施工方式,并研究应用支撑剂段塞以及优化射孔等工艺,提高了压裂设计参数的准确性及施工成功率,并使施工成功率和压裂效果明显增加.通过优选适合不同类型气田的低伤害压裂液,采用综合保护技术,在压裂施工中采用分段破胶、裂缝强制闭合技术,减少了液体对储层的伤害.

Fracturing process technique of low-permeability gas deposit in Zhongyuan Oilfieid

Zhongyuan Oilfield is featured by low gas reservoir pressure,long perforation distance and bad well condition of some wells. Aimming at setting these problems and realizing effective development of the reservoir, research work on enhancing recovery techniques suitable for the reservoir condition was carried out. The optimized fracturing design parameters and operation methods, along with the propping agent slug and the optimal perforation techniques, greatly improved the accuracy rate of fracturing parameters design, the successful operation ratio, and the fracturing effects. By optimizing the low damage fracturing fluid adaptable for different kinds of gas reservoir and adopting techniques such as comprehensive protection, segregated gel breaking and hard closing of fractures in operation, the reservoir damage by the fluid was extremely decreased.