The Optimal Range of the Nitrogen-Injection Rate in Shale-Gas Well Drilling
- Jun Li (China University of Petroleum) | Boyun Guo (University of Louisiana at Lafayette) | Gonghui Liu (Beijing Information Science & Technology University) | Wei Liu (China National Petroleum Corporation Drilling Research Institute)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- January 2013
- Document Type
- Journal Paper
- 60 - 64
- 2012. Society of Petroleum Engineers
- 5.4.2 Gas Injection Methods, 1.6 Drilling Operations, 5.8.2 Shale Gas, 4.6 Natural Gas
- 2 in the last 30 days
- 979 since 2007
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Given the downturn of natural-gas prices in North America, it is vitally important to reduce the cost of drilling shale-gas wells. Gas-percussion drilling with nitrogen gas recently has been used in shale-gas field development. It has increased footage capacity by approximately 60%. Because the rate of penetration (ROP) is fast in gas-percussion drilling, it requires injection of an adequate quantity of nitrogen gas to clean the hole. However, a high rate of gas injection often causes wellbore erosion and deviation problems. It is imperative to determine the optimal range of the nitrogen-gas injection rate that can mitigate the problem. This paper presents an analytical method for predicting the optimal range of the nitrogen-gas-injection rate required to balance the borehole-cleaning and -integrity issues. The optimal gas-injection rate was sought between the minimal value required for hole cleaning and the maximal permissible value to avoid hole erosion. The minimal value was determined on the basis of Angel's kinetic-energy theory for cuttings removal modified with Charles' theory of particle-grinding energy. The maximum required value was estimated by use of the sonic flow criterion at the bit. Good consistency was observed between the predicted optimal range of gas-injection rate and field problem-free nitrogen-gas-injection rates. This paper provides drilling engineers a practical tool for designing the optimal range of nitrogen-gas-injection rate to cut shale-gas drilling cost.
|File Size||214 KB||Number of Pages||5|
Adewumi, M.A. and Tian, S. 1989. Hydrodynamic Modeling of WellboreHydraulics in Air Drilling. Paper SPE 19333 presented at the Eastern RegionalMeeting, 24?27 October, Morgantown, West Virginia. http://dx.doi.org/10.2118/19333-MS.
Angel, R.R. 1957. Volume Requirements for Air or Gas Drilling. Trans.AIME 210: 325?330. http://dx.doi.org/10.2118/000873-G-PA.
Capes, C.E. and Nakamura, K. 1973. Vertical Pneumatic Conveying: AnExperimental Study with Particles in the Intermediate and Turbulent FlowRegimes. Can. J. Chem. Eng. 51 (1): 31?38. http://dx.doi.org/10.1002/cjce.5450510106.
Ford, R., Stone, A., Spedale, A. et al. 2011. Efficiently DevelopingFayetteville Shale Gas Reserves: Percussion Drilling Solves ApplicationChallenges/Reduces Drilling Costs. Paper SPE 148828 presented at the SPEEastern Regional Meeting, 17?19 August, Columbus, Ohio. http://dx.doi.org/10.2118/148828-MS.
Gray, K.E. 1958. The Cutting Carrying Capacity of Air at Pressures AboveAtmospheric. Pet Trans. AIME 213: 180?185.
Guo, B. and Liu, G. 2011. Applied Drilling Circulation Systems.Oxford, UK: Elsevier.
Guo, B., Miska, S.Z. and Lee, R. 1994. Volume Requirements for DirectionalAir Drilling. Paper SPE 27510 presented at the SPE/IADC Drilling Conference,15?18 February, Dallas, Texas. http://dx.doi.org/10.2118/27510-MS.
Guo, B., Zhang, Z., and Gao, D. 2011. Optimal Use of Flow-Diverting Joint inUnderbalanced Gas Drilling. Paper SPE 143309 presented at the SPE Asia PacificOil and Gas Conference and Exhibition, 20?22 September, Jakarta, Indonesia. http://dx.doi.org/10.2118/143309-MS.
Ikoku, C.U., Azar, J.J., and Williams, C.R. 1980. Practical Approach toVolume Requirements for Air and Gas Drilling. Paper 9445 presented at the SPEAnnual Technical Conference and Exhibition, 21?24 September, Dallas, Texas. http://dx.doi.org/10.2118/9445-MS.
Machado, C.J. and Ikoku, C.U. 1982. Experimental Determination of SolidFraction and Minimum Volume Requirements in Air and Gas Drilling. J. PetTech 34 (11): 2645?2655. http://dx.doi.org/10.2118/9938-PA.
Martin, D.J. 1952. Use of Air or Gas as a Circulating Fluid in RotaryDrilling--Volumetric Requirements. Hughes Eng. Bull. 23:35?42.
McCray, A.W. and Cole, F.W. 1959. Oil Well Drilling Technology.Norman, Oklahoma: University of Oklahoma Press.
Mitchell, R.F. 1983. Simulation of Air and Mist Drilling for GeothermalWells. J. Pet Tech 35 (11): 2120?2126. http://dx.doi.org/10.2118/10234-PA.
Pan, X. 1990. Calculation Method for Fragmentation Energy. J. ChinaBuilding Equipment No. 1, 13?15.
Polczer, S. 2009. Shale Expected to Supply Half of North America's Gas.Calgary Herald 9 April 2009, accessed 27 August 2009.
Puon, P.S., and Ameri, S. 1984. Simplified Approach to Air DrillingOperations. Paper SPE 13380 presented at the Eastern Regional Meeting, 31October?2 November, Charleston, West Virginia. http://dx.doi.org/10.2118/13380-MS.
Schoeppel, R.J. and Sapre, A.R. 1967. Volume Requirements in Air Drilling.Paper SPE 1700 presented at the Drilling and Rock Mechanics Conference, 25?26January, Austin, Texas. http://dx.doi.org/10.2118/1700-MS.
Scott, J.O. 1957. How to Figure How Much Air to Put Down the Hole in AirDrilling. Oil & Gas J. (April): 104?107.
Sharma, M.P. and Chowdry, D.V. 1984. A Computational Model for DrilledCutting Transport in Air (or Gas) Drilling Operations. Paper SPE 12236presented at the Southeast Conference on Theoretical and Applied Mechanics. http://dx.doi.org/10.2118/12236-MS.
Sharma, M.P. and Crowe, C.T. 1978. A Novel Physico-Computational Model forQuasi One- Dimensional Gas-Particle Flows. ASME J. FluidsEng. 100: 343?349. http://dx.doi.org/10.1115/1.3448678.
Szilas, A.P. 1975. Production and Transport of Oil and Gas. Vol. 99,155?156. Amsterdam: Elsevier.
Tian, S. and Adewumi, M.A. 1992. Development of Hydrodynamic-Model-BasedAir-Drilling Design Procedures. SPE Drill Eng 7 (4):241?246. http://dx.doi.org/10.2118/23426-PA.
Wolcott, P.S. and Sharma, M.P. 1986. Analysis of Air Drilling CirculatingSystems with Application to Air Volume Requirement Estimation. Paper SPE 15950presented at the SPE Eastern Regional Meeting, 12?14 November, Columbus,Ohio.
Zhang, Hui, Zhang, Hongyun, Guo, B. et al. 2012. Analytical and NumericalModeling Reveals the Mechanism of Rock Failure in Gas UBD. J. Nat. Gas Sci.Eng. 4: 29?34. http://dx.doi.org/10.1016/j.jngse.2011.09.002.
Zheng, S. 1999. Superfine Grinding. 63?75. Beijing: China BuildingMaterials Industry Press.