The Boosting Mechanism and Effects in Cavity During Hydrajet Fracturing Process

被引：12

作者：

Qu, H. ^{[1
]}

Li, G. ^{[1
]}

Huang, Z. ^{[1
]}

Tian, S. ^{[1
]}

机构：

[1] China Univ Petr, State Key Lab Petr Resource & Prospecting, Beijing 102249, Peoples R China

来源：

PETROLEUM SCIENCE AND TECHNOLOGY | 2010年 / 28卷 / 13期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

boosting mechanism; cavity; effects; experiment; hydrajet fracturing; numerical simulation; WATER-JET PERFORATION;

D O I：

10.1080/10916460903096863

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This article presents the boosting mechanism in cavity during a hydrajet fracturing process. It is found that there are two kinds of pressures enhancing the value within a cavity. One is the impact pressure by the jetted fluid from a nozzle, and the other is back-pressure by the hole in a casing. A numerical simulation method was utilized to evaluate boosting effects combined with experiment results. Distribution of pressure in a cavity was obtained. The results show that the pressure in a cavity is higher than that in the wellbore. It will be increased with the nozzle pressure drop and nozzle diameter rising. The hole plays an important seal role to created back-pressure, which boosts the pressure greatly. The boosting value can reach approximately to 8.2 MPa with F 6 mm nozzle diameter and differential pressure of 25 MPa.

引用

页码：1345 / 1350

页数：6

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