Research Article | OPEN ACCESS
New and Modified Equations for Planning Two-Buildup Directional and Horizontal Wells
Sun Tengfei, Deli Gao and Hui Zhang
MOE Key Lab of Petroleum Engineering, China University of Petroleum, Beijing 102249, China
Research Journal of Applied Sciences, Engineering and Technology 2013 7:2309-2316
Received: April 27, 2012 | Accepted: June 01, 2012 | Published: March 11, 2013
Abstract
Two-buildup directional and horizontal well is usually used for the type trajectory that the target zone is accurate but build rate is not. In the past and at present, the petroleum engineers use the Karlsson method and equations to design the two-buildup directional and horizontal well. But through rigid derivation and analysis, we have found some places that need to be improved. This study has put forward new and modified equations on the basis of Karlsson method. The new method considers the maximum and minimum build rates expected in the first and second curves and supposes that the upper and lower bound trajectory are all two-build up trajectory type. This study also has considered the difference of the maximum and minimum build rates expected in the second curve and the first curve. The new and modified method and equations are tested through two examples.
Keywords:
Build rate, directional and horizontal wells, tangent angle, trajectory design, two-buildup,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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