THERMAL SCIENCE

International Scientific Journal

Na Wei

,

Ying-Feng Meng

,

An-Qi Liu

,

Hai-Tao Li

,

Lin Jiang

,

Li-Jun Zheng

,

Qiang Fu

,

Xingcai Lv

CHARACTERISTICS OF A NON-CIRCULATING TRANSIENT FLOW DURING GAS INVASION IN THE UNDERBALANCED DRILLING PROCESS

ABSTRACT
The wellbore flow in a liquid-based underbalanced drilling process consists of a steady multiphase flow during normal drilling and a transient gas-liquid flow without mud-cycling. The theory of steady multiphase flow has been used to calculate the pressure profile of normal drilling. Therefore, it is vital to figure out how to calculate the transient pressure variation caused by formation fluid flow-ing into wellbore when the mud-cycling is stopped. In this paper, a numerical simulation method and a mathematic model are established to study the wellbore flow and to control pressure during the underbalanced drilling process with liquid-based mud. The results also shed a light on the hidden mechanism of this special flow.
KEYWORDS
underbalanced drilling, non-circulating, gas invasion, regularity, transient flow
PAPER SUBMITTED: 2018-03-01
PAPER REVISED: 2018-09-01
PAPER ACCEPTED: 2018-10-01
PUBLISHED ONLINE: 2019-09-14
DOI REFERENCE: https://doi.org/10.2298/TSCI1904257W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 4, PAGES [2257 - 2264]
REFERENCES
  1. Wei, N., et al., Sensitivity Analysis of Multiphase Flow in Annulus during Drilling of Marine Natural Gas Hydrate Reservoirs, Journal of Natural Gas Science & Engineering, 36, Part A (2016), Nov., pp. 692-707
  2. Borkevoll, K. S., et al., Successful Field Use of Advanced Dynamic Models, Proceedings, IADC/SPE Drilling Conference, Society of Petroleum Engineers, Miami, Fla., USA, 2006
  3. Wei, N., et al., Annular Phase Behavior Analysis during Marine Natural Gas Hydrate Reservoir Drilling (In Chinese), Acta Petrolei Sinica, 38 (2017), 6, pp. 710-720
  4. Lee, S. J., et al., Pressure Wave Speeds from the Characteristics of Two Fluids, Two-Phase Hyperbolic Equation System, Multiphase Flow, 24 (1998), 5, pp. 855-866
  5. Wei, N., et al., Imaging of Gas-Liquid Annular Flows for Underbalanced Drilling Using Electrical Re-sistance Tomography, Flow Measurement and Instrumentation, 46 (2015), B, pp. 319-326
  6. Zuber, N., et al., Average Volumetric Concentration in Two-Phase Flow Systems, Journal of Heat Transfer, 87 (1965), 4, pp. 453-468
  7. Wei, N., et al., Characteristics Analysis of Multiphase Flow in Annulus in Natural Gas Hydrate Reser-voir Drilling, AER-Advances in Engineering Research, 40 (2015), Jan., pp. 396-400
  8. Martin, C. S., Padmanabhan, M., Pressure Pulses Propagation in Two-Component Slug Flow, Fluids Engineering, 101 (1979), 1, pp. 44-52
  9. Wei, N., et al., Reservoir Evaluation Technology During Underbalanced Drilling of Horizontal Wells in Gas Reservoirs, Geotechnical Testing Journal, 41 (2018), 1, pp. 164-170
  10. Wei, N., et al., Foam Drilling in Natural Gas Hydrate, Thermal Science, 19 (2015), 4, pp. 1403-1405
  11. Shi, H., et al., Drift-flux Parameters for Three-Phase Steady State Flow in Wellbores, SPE Journal, 10 (2005), 2, pp. 130-137
  12. Wei, N., et al., Cuttings Transport Models and Experimental Visualization of Underbalanced Horizontal Drilling, Mathematical Problems in Engineering, 10 (2013), 2, pp. 1024-1230
  13. Wang, Z. Y., et al., Multiphase Flow Behavior in Annulus with Solid Gas Hydrate Considering Nature Gas Hydrate Phase Transition, Petroleum Science, 6 (2009), 1, pp. 57-63
PDF VERSION [DOWNLOAD]
Characteristics of a non-circulating transient flow during gas invasion in the underbalanced drilling process

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence