Research on Well Completion Technology of Hot-Spring Wells in the Sanmafang Area of
详细信息
- 责任者：Jing Long (No.4 Hydrogeology Survey & Engineering Geology Brigade of Hebei Geological Exploration Bureau ; Cangzhou 061000 ; China) ; Wang Yanjing
- 刊名：Geology and Prospecting
- 出版年：2010
- 卷期：46(4)
- 关键词：成井工艺 ; well completion technology ; 地热井 ; geothermal wells
- 页码：p.716-721
- 图表：3 illus., 16 refs.
- 分类号：2000
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
In this paper, the authors have analyzed the problems in the previous well construction, and used the third-interval of well completion technology. In the first interval, after the 273 mm surface casing pipe was tripped in the steady aquifuge above the high pressure hot reservoir, cement sealing was implemented which was ensured by pressure test. In the second interval, the drilling was balanced by increasing the slurry proportion. At the end of drilling, the 219 mm casing was tripped timely based on the limited inrush of water. In the third interval, with the precondition of safety drilling, the well was completed by fresh water-drilling on the basis of debris size to increase the yield. Finally, the well completion was realized favorably with the safe well closure.