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Optimal Drilling Parameters Design Based on Single Drilling Depth Indicator in Controlled Gradient Drilling

  • Jiangshuai Wang
  • Jun LiEmail author
  • Gonghui Liu
  • Hongwei Yang
  • Kuidong Luo
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 75)

Abstract

Controlled gradient drilling technology was put forward to solve the problem of narrow pressure margins in deep water drilling. In this paper, an optimization model for optimal drilling parameters design is established for controlled gradient drilling. The established optimization model aims at achieving the longest single drilling depth, while reducing pressure difference between wellbore pressure and formation pore pressure as much as possible. It is beneficial to increase the ROP and reduce formation damage. The SQP (sequential quadratic programming) algorithm is presented to solve the optimization model. Simulation results indicate that longer single drilling depth and better drilling parameters (control variables) can be obtained by use of optimization model when the range of control variables widens. Furthermore, in case study, small bottom-hole pressure difference can be obtained by use of optimization model. In addition, the established optimization model ensured the dynamic wellbore pressure within narrow pressure margins during optimization process. It is conducive to safe and efficient drilling.

Keywords

Narrow pressure margins Controlled gradient drilling Optimization model Optimal drilling parameters Safe and efficient drilling 

Notes

Acknowledgements

Project supported by the Key Program of National Natural Science Foundation of China (Project No. 51734010).

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Jiangshuai Wang
    • 1
  • Jun Li
    • 1
    Email author
  • Gonghui Liu
    • 1
    • 2
  • Hongwei Yang
    • 1
  • Kuidong Luo
    • 1
  1. 1.College of Petroleum EngineeringChina University of Petroleum-BeijingChangping, BeijingChina
  2. 2.Beijing University of TechnologyChaoyang District, BeijingChina

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