水力喷射压裂关键机理探讨  

Key Mechanisms of Hydraulic Jet Fracturing

作　　者：马飞[1] 杨逸[1] 宋燕高[1] 付育武[1] 

机构地区：[1]中国石化西南油气分公司工程技术研究院,四川德阳618000

出　　处：《天然气技术与经济》2011年第2期36-37,60,共3页Natural Gas Technology and Economy

基　　金：国家重大专项"大型油气田及煤层气开发"(编号:2008ZX05002)基金项目的部分研究内容

摘　　要：为了更深入地了解水力喷射压裂技术的部分机理,通过模拟水力喷射射孔孔内的压力分布并分析其规律,进行了现场工况条件下喷嘴压降对孔内压力的定量分析和不同喷嘴直径条件下喷嘴压降与排量关系的计算,结论为:射流速度的衰减将动能转化为静压能,致使孔内压力升高;增加射流喷射压力有助于获得较大的孔内增压;喷嘴要产生较大的压降,需要较大的作业排量。In this study, in order to have a deep understanding of some mechanisms of hydraulic jet fracturing, the pressure distribution within borehole during hydraulic jetting is simulated; the distribution law is analyzed; the injection drop vs. borehole pressure under work condition is quantitatively analyzed; and the relationship between injection drop and discharge capacity under different diameters of nozzle is calculated. Some results are obtained: (1) the jetting velocity attenuation may convent dynamic energy into static energy, resulting in an increase of borehole pressure; (2) an increase of injection pressure will help obtaining a large pressure within borehole; and (3) a larger operating discharge capacity may be needed to produce a large pressure drop for the nozzle.

关 键 词：水力喷射 孔内压力 喷嘴压降 静压 动压 

分 类 号：TE256[石油与天然气工程—油气井工程]