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CBM drilling technical parameter optimization methodology and software development: a case study of LUAN mining area.

Yuliang Guo1, Liwen Cao1, Shuxun Sang2

  • 1China University of Mining and Technology, School of Resources and Geosciences, 1 University Rd, Xuzhou, Jiangsu, 221116 China.

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|March 31, 2021
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Summary
This summary is machine-generated.

This study optimizes coalbed methane (CBM) drilling parameters to prevent borehole wall instability and reduce costs. A genetic algorithm and specialized software were developed to enhance drilling efficiency and safety.

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Area of Science:

  • Petroleum Engineering
  • Geological Engineering

Background:

  • Coalbed methane (CBM) drilling often faces challenges with borehole wall instability and fluid leakage.
  • Optimizing drilling parameters is crucial for efficient and safe CBM extraction.

Purpose of the Study:

  • To determine safe drilling fluid density ranges for borehole stability.
  • To optimize drilling fluid hydraulic and drilling parameters for cost-effectiveness.
  • To develop a software tool for designing and optimizing CBM drilling parameters.

Main Methods:

  • Analysis of borehole wall collapse and fracture pressures to establish safe drilling fluid density.
  • Optimization of hydraulic and drilling parameters using a genetic algorithm with the objective of minimizing drilling cost.
  • Development of a visualization software for CBM borehole wall stability parameter design and optimization.

Main Results:

  • A safe drilling fluid density range was determined based on geological conditions.
  • Optimized drilling parameters were identified to improve efficiency and reduce costs.
  • The developed software effectively addressed drilling leakage issues in practical application.

Conclusions:

  • The study provides a systematic approach to optimize CBM drilling parameters for enhanced borehole stability and cost reduction.
  • The developed software serves as a valuable tool for drilling engineers, enabling safe and rapid parameter optimization.
  • Effective management of drilling fluid density and hydraulic parameters is key to preventing CBM drilling leakage.