Optimization of Jetted Radial Wells

Master thesis (2019)

Authors

D. Troost Civil Engineering & Geosciences

Contributors

J.D. Jansen (supervisor 1)
Lies Peters (supervisor 1)
O. Leeuwenburgh (supervisor 1)
Faculty
Civil Engineering & Geosciences
Copyright: © 2019 Diederik Troost
Geothermal Optimization Petroleum Engineering Jetted radial wells CMA-ES
More Info
expand_more

Published Date

15-01-2019

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Civil Engineering & Geosciences

Abstract

Jetted radial wells are a relatively new form of hydraulic stimulation for oil and gas wells, where small diameters holes extend radially from a wellbore. This technique for increasing well connectivity could also be applied to geothermal wells. Radials can be freely placed along a backbone well, making the design of an economically viable well plan time intensive. Numerical optimization has been extensively applied to well design and will be applied for the design of a radial well plan. A simple optimization case is used to compare gradient-based and gradient-free optimization for jetted radial optimization, the gradient-free CMA-ES algorithm is chosen for the workflow. In addition to CMA-ES, mixed integer CMA-ES and uncertainty-handling CMA-ES are incorporated in the workflow. Three reservoir cases are evaluated for optimization using these algorithms. The workflow is able to determine well plans with higher NPV in each of these cases though finding a global optimum remains difficult.