Numerical Calculation on Design of Catenary Shape Profile for Extended Reach Well
详细信息
- 责任者：Lu Gang (Exploration & Development Research Institute ; Liaohe Oilfield Company ; PetroChina ; Panjin 124010 ; China) ; Cao Chuanwen
- 刊名：Exploration Engineering
- 出版年：2010
- 卷期：37(2)
- 关键词：大位移井 ; extended reach well ; 数学模型 ; mathematical models
- 页码：p.1-3, 8
- 图表：2 illus., 1 table, 7 refs.
- 分类号：2000
- issnNo：ISSN1672-7428
- isbnNo：CN11-5063/TD
摘要
Catenary shape profile is a classical type of extended reach well, a nonlinear equation with the initial well oblique angle as unknown factor should be solved for its design. In this paper, the nonlinear equation is changed to a new one only with logarithmic function and polynomial function, to which geometric analysis is made on the function character, and step search algorithm and adaptive step search algorithm are proposed for solution interval. Numerical solution of new equation can be got rapidly in solution interval by dichotomy. The effectiveness of the above algorithm was proved by the design case of extended reach well, and relationship between hole curvature in arc well section and equation solution was discussed.