特低渗透薄互层油藏整体压裂开发技术

Development of Interbedded Thin Oil Reservoirs with Extremely Low Permeability through Overall Fracturing

特低渗透薄互层油气藏因其储量丰度低、自然产能低等原因,通常需进行储层压裂改造才能获得经济效益。为有效动用南堡油田X断块特低渗透薄互层油藏,通过油藏描述,精细刻画砂体,建立了精细地质模型;进行了整体压裂技术油藏数值模拟研究,优选出井网、井距、压裂缝长等关键性技术参数,优化了大斜度井射孔、压裂工艺。通过现场实施,平均单井产能提高2.5倍,改善了油藏开发效果。

With low reserve abundance,low natural productivity and other factors,the interbedded thin reservoirs with low permeability are often stimulated by fracturing for purpose of enhanced economics. To effectively develop such oil reservoirs with extremely low permeability in Faulted Block X in Nanpu Oilfield,a fine geologic model through reservoir description and fine description of sandstone formations is established. In addition,by using numerical simulation of overall fracturing techniques,key technical parameters,such as well pattern,spacing and fracture length,are determined to optimize perforation and fracturing processes in highly deviated wells. Field application results show that reservoir development performances have been improved with average productivity of individual well enhanced by 2. 5 times.