The productivity calculation model of perforated horizontal well and optimization of inflow profile

Abstract

Aiming at the large error in productivity predication and incomplete consideration in completion parameters design of perforated horizontal well, a model which coupled the relationship of pressure and flow rate in reservoir seepage, near-wellbore inflow and wellbore flow was established. The impact of near-wellbore heterogeneity, wellbore flow pressure drop and completion parameters on the inflow profile of horizontal well is analysed. Studies showed that with a stronger near-wellbore heterogeneity, the inflow profile would fluctuate more seriously. Perforation density had a great influence on the inflow profile and local changes of it would bring a shunt effect. Completion design of variable density perforated horizontal well with an optimized inflow profile which was close to a standard profile would improve the horizontal well development effect. The achievement can provide directive meanings to productivity predication and completion parameters design of horizontal wells in oilfield.

Keywords

Horizontal well / Productivity model / Variable density perforation / Inflow profile

References

[1] Wei Pang, Dechun Chen, Zhongping Zhang, et al., Segmentally variable density perforation optimization model for horizontal wells in heterogeneous reservoirs, Petroleum Explor. Dev. 39 (2) (2012) 214-221.

[2] Lifu Jiang, Dechun Chen, Wei Pang, et al., Productivity sensitivity analysis and completion parameters design of perforated horizontal well, Complex Hydrocarb. Reserv. 4 (3) (2011) 62-66.

[3] Wanjing Luo, Xiaodong Wang, Fanhua Li, Productivity of horizontal wells with segmental perforation, Petroleum Explor. Dev. 36 (1) (2009) 97-102.

[4] Shuping Wang, Zhiping Li, Cunyou Zou, et al., Deliverability optimization analysis in horizontal wells with perforated completions, Geoscience 21 (Suppl.) (2007) 74-78.

[5] Jianguang Wei, Zhiming Wang, Xiaoqiu Wang, Sectional optimization model of perforation parameters of horizontal well in heterogeneous reservoir, J. China Univ. Petroleum 33 (2) (2009) 75-79, 84.

[6] Xin Zhang, The effect of permeability heterogeneity on inflow performance in horizontal wells, Special Oil Gas Reservoirs 17 (2) (2010) 88-91.

[7] Shijun Huang, Linsong Cheng, Fenglan Zhao, et al., The flow model coupling reservoir percolation and variable mass pipe flow in production section of the stepped horizontal well, J. Hydrodynamics 20 (4) (2005) 463-471.

[8] Jianguo Zhang, Guanglun Lei, Yanyu Zhang, Fluid Mechanics in Hydrocarbon Reservoir, Dongying: The Press of China University of Petroleum, 2006, p. 49.

[9] M. Muskat, The Flow of Homogeneous Fluids Through Porous Media, New York: McGraw-Hill Book Company, 1937.

[10] Yuetian Liu, Analysis on seepage flow and productivity of a horizontal well in an anisotropic reservoir, J. China Univ. Petroleum 26 (4) (2002) 40-47.

[11] Ruihe Wang, Yuzhe Zhang, Yuhuan Bu, et al., A segmentally numerical calculation method for estimating the productivity of perforated horizontal wells, Petroleum Explor. Dev. 33 (5) (2006) 630-633.

[12] Wenwen Yan, Optimization of Horizontal Well Perforation Density, Dongying: China University of Petroleum(East China), 2010.

[13] Jianlei Yang, The Optimization of Perforated Completion Technology of Horizontal Well, Dongying: China University of Petroleum(East China), 2010.

[14] Metin Karakas S.M. Tariq.Semianalytical Productivity Models for Perforated Completions. SPE 18247.

[15] Kenji Furui, AComprehensive Skin-factor Model of Horizontal-well Completion Performance, SPE 84401-PA, 2005.

[16] Kenji Furui D. Zhu, ANew Skin-factor Model for Perforated Horizontal Wells, SPE 84401-PA, 2005.

[17] Tom Clemo U. Boise State, Flow in Perforated Pipes: a Comparison of Models and Experiments, SPE 89036-PA, 2006.

[18] Hyun Cho, Kellogg Brown & Root Inc, Intergrated Optimization on a Long Horizontal Well Length, SPE 83669-PA, 2003.

[19] Enxi Yuan, Engineering Fluid Mechanics, Beijing: Petroleum Industry Press, 2007.