New development of theories in gas drilling

Theories established from engineering fundamentals have been of great value in supporting the design and execution of drilling operations in gas drilling where gas is used as a drilling fluid. This work presents an overview of new theories developed in recent years for special gas drilling operations including horizontal wells. These new theories are found in the areas of gas-mixture flow hydraulics in deviated and horizontal boreholes, hole cleaning of solids accumulation, hole cleaning of formation water, flow diverging for washout control, bit orifice optimization, and depression of formation water influx. This paper provides drilling engineers with updated mathematical models and methods for optimizing design to improve gas drilling performance.

[1]  R. F. Mitchell.  Simulation of air and mist drilling for geothermal wells , 1981 .

[2]  F. Cole,et al.  Oil Well Drilling Technology , 1973 .

[3]  Michael J. Economides,et al.  Comprehensive -Simulation of Horizontal-Well Performance , 1991 .

[4]  J. J. Azar,et al.  Practical Approach To Volume Requirements For Air And Gas Drilling , 1980 .

[5]  N. P. Umanchik,et al.  Petroleum-production engineering , 1977 .

[6]  Alfred Daniel Hill,et al.  A rigorous formation damage skin factor and reservoir inflow model for a horizontal well , 2003 .

[7]  C. J. Machado,et al.  Experimental Determination of Solids Fraction and Minimum Volumetric Requirements in Air and Gas Drilling , 1982 .

[8]  D. S. Wolcott,et al.  Analysis of Air Drilling Circulating Systems With Application to Air Volume Requirement Estimation , 1986 .

[9]  P. D. Allan.  Nitrogen Drilling System for Gas Drilling Applications , 1994 .

[10]  A. Dukler,et al.  Analysis and Prediction of Minimum Flow Rate for the Continuous Removal of Liquids from Gas Wells , 1969 .

[11]  M. P. Sharma,et al.  A Computational Model for Drilled Cutting Transport in Air (or Gas) Drilling Operations , 1986 .

[12]  Adewumi,et al.  Development of Hydrodynamic-Model-Based Air-Drilling Design Procedures , 1992 .

[13]  R. Angel.  Volume Requirements for Air or Gas Drilling , 1957 .

[14]  P. S. Puon,et al.  Simplified Approach to Air Drilling Operations , 1984 .

[15]  Distribution of the Sizes of Rock Cuttings in Gas Drilling At Various Depths , 2012 .

[16]  K. Nakamura,et al.  Vertical pneumatic conveying: An experimental study with particles in the intermediate and turbulent flow regimes , 1973 .

[17]  Boyun Guo,et al.  Volume Requirements for Directional Air Drilling , 1994 .

[18]  D. Gao,et al.  Research on a Triaxial Rate of Penetration (ROP) Model Related to Unloading in Oil & Gas Drilling , 2013 .

[19]  S. D. Joshi,et al.  Augmentation of well productivity with slant and horizontal wells , 1988 .

[20]  William C. Lyons.  Air and Gas Drilling Manual , 2000 .

[21]  Boyun Guo,et al.  Gas Volume Requirements for Underbalanced Drilling: Deviated Holes , 2002 .

[22]  Kenneth E. Gray.  The Cutting Carrying Capacity of Air at Pressures Above Atmospheric , 1958 .

[23]  Roger J. Schoeppel,et al.  Volume Requirements in Air Drilling , 1967 .

[24]  M Kranzberg,et al.  History of Technology , 1929, Nature.