综合压裂技术在低压致密气藏储层中的研究与应用  

Study and Application of Synthetical Pressure-fracture Technical on Low Pressure and Tight Gas Reservoir

作　　者：秦玉英 陈付虎 王福平[2] 

机构地区：[1]中石化华北分公司勘探开发研究院,郑州450006 [2]吉林大学应用技术学院,长春130022

出　　处：《吉林大学学报（地球科学版）》2009年第3期503-506,共4页Journal of Jilin University：Earth Science Edition

基　　金：中国石油化工股份有限公司“十条龙”项目(P02077)

摘　　要：大牛地气田储层属于低压致密气层,非均质性强、孔喉直径小、毛管压力高、多层叠置且层间跨度不等导致储层保护和加砂压裂难度大。通过研究提出了采用液氮增能低伤害压裂液体系,降低对储层的伤害,有效地保护了储层;采用大型加砂压裂技术,增加了裂缝长度,扩大了泄气面积,提高了单层产量,气产量由200 m3/d提高到7.23×104m3/d;采用不动管柱连续分层压裂工艺技术实现了多层叠置气层均衡改造,压裂投产作业时间缩短了近67%,费用降低了20.69%。The Daniudi gas field belongs to a reservoir of lower pressure and tight gas with a low pressure, a strong heterogeneity, a small diameter of pore and throat, a high capillary pressure, a character of multi-zone superimposed and varies gap distance between zones, which results in difficulty in reservoir protection and fracturing. A method of low damage fracture fluid with liquid N2 is adopted, which can decrease the reservoir damage and protect reservoir. Large-scale fracturing can prolong fracture length, enlarge drainage area and increase gas rate per layer. The gas production increased from 200 m^3/d to 7.23×10^4m^3/d. Fracture operation time was reduced nearly 67%, and the cost was reduced 20.69 % after separated fracturing without pulling string realized balance stimulation for multi-layer superimposed.

关 键 词：大牛地气田 低渗透率 气藏储层 多层叠置 综合压裂 

分 类 号：P634.5[天文地球—地质矿产勘探]