Controlled Pressure Drilling and the Application in High-Temperature Geothermal Exploration
详细信息
- 责任者：Yu Jinyang (China University of Geosciences ; Beijing 100083 ; China) ; Bai Zhanxue
- 刊名：Exploration Engineering
- 出版年：2013
- 卷期：40(1)
- 关键词：钻进 ; drilling ; 地热勘探 ; geothermal exploration
- 页码：p.19-23
- 图表：illus., 4 tables, 9 refs.
- 分类号：2000
- issnNo：ISSN1672-7428
- isbnNo：CN11-5063/TD
摘要
Controlled pressure drilling(CPD) includes managed pressure drilling(MPD),underbalanced drilling(UBD) and air drilling(AD).CPD can be used to decrease non drilling time and drilling hazards,increase rate of penetration(ROP),prevent lost of circulation,eliminate sticking,protect reservoir with low pressure and improve productivity.Geothermal wells are of characteristics of high temperature,hard rock,fractured formation and low pore pressure along with likely high pressure of shallow formation.It is proved that CPD can increase ROP,prevent lost of circulation and improve productivity.This paper introduces CPD technology and its application in geothermal energy exploration and development.