Research on Optimization of Perforated Horizontal Wells with Separated Production Scheme Based on Genetic Algorithm

Abstract:

Based on the separated production scheme of perforated horizontal well, the production is closely related to the number, length and location of horizontal intervals. New reservoir / wellbore coupling models were modeled which included two boundaries: closed boundary and constant pressure boundary. For these coupling models, two new optimization models were modeled, which took the production as the objective function and took the length and location of horizontal intervals as the optimization variables. Then the numerical calculation models were proposed by using the Gauss-Laguerre quadrature formula. Applying the genetic algorithm and writing the numerical stimulation software, the optimized schemes with 2 segments, 3 segments and 4 segments for planning intervals of the perforated horizontal wells were presented. By comparing the optimized schemes, we can see that the horizontal well production was not infinite increasing with the length of horizontal intervals, but only in the suitable length of horizontal intervals to maintain high production. And it is not the more segments the higher production. For the perforated horizontal well in closed reservoir, the production was the highest based on the optimized schemes with 3 segments.

• Periodical: Advanced Materials Research (Volumes 1044-1045)
• Pages: 495-502
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1044-1045.495
• Online since: October 2014
• Authors: Shan Liu*, Deng Ke Tong, Shu Heng Tang
• Keywords: Gauss-Laguerre Quadrature Formula, Genetic Algorithm (GA), Horizontal Intervals, Perforated Horizontal Well, Reservoir/Wellbore Coupling Models, Separated Production Scheme

References

[1] P.A. Goode, D J Wilkinson, Inflow Performance of Partially Open Horizontal Wells[R], SPE 19341, (1991).

[2] P A Goode, Supplement to SPE 19341，Inflow Performance of Partially Open Horizontal Wells, SPE 23546.

[3] Ozkan E, Sarica C, Effect of conductivity on horizontal well pressure behavior, SPE24683.

[4] Thara M, Kikuyama K et al, Flow in horizontal wellbores with influx through porous walls, SPE28485.

[5] Liu Yusong, Lian Peiqing, Tong Dengke, Optimum design of the horizontal section length in a horizontal well using genetic algorithm [J], ACTA Petrolei Sinica. 2008, 28(2): 296-299.

[6] Wang Jiahong, Horizontal section design method for overall development of horizontal well with middle-high permeability reservoir [J], ACTA Petrolei Sinica. 2008, 29(3): 399-404.

[7] Thompson L G et al, Efficient Algorithms for Computing the Bounded Reservoir Horizontal Well Pressure Response, Paper SPE 21827.

[8] Chen Huowang et al, Genetic programming (one), (two). Computer Scienc. 1995 22(6): 12-15, 1996 23(1): 14-18.

[9] Liu Xiangping, Guo Chengzhu, Jiang Zhixiang, The model coupling fluid flow in the reservoir with flow in the horizontal wellbore [J], ACTA Petrolei Sinica. 1995, 20(3): 82-86.

[10] Liu Shan, Tong Dengke, Optimization models of separated production scheme in horizontal wells based on reservoir-wellbore coupling [J], ACTA Petrolei Sinica, 2009, 30(6), 932-935.

[11] Xiong Youming, Pan Yingde, Study on productivity prediction of t he horizontal wells wit h completion methods of perforation series [J], Journal of Southwestern Petroleum Institute. 1996, 18 (2): 56-62.

[12] Luo Wanjing et al, Productivity of horizontal wells with segmental perforation [J], Petroleum Exploration and Development. 2009, 36 (1): 97-102.

[13] Li Baozhu, Pressure distribution behavior of horizontal section in horizontal well [J], Acta Petrolei Sinica. 2003, 24(2): 97-100.

[14] Dikken B J, Pressure Drops in Horizontal Wells and its Effects on their Production Performance, SPE 19824.

[15] Ouyang, Liang-Biao, General wellbore flow model for horizontal, vertical, and slanted well Completions[R], SPE 36608, (1998).

[16] Zhou Shengtian, An analytic model of horizontal section pressure drop [J], Petroleum Exploration and Development. 1997, 24 (3): 49-52.

[17] Kong Xiangyan, High seepage mechanics, Hefei: University of Science & Technology China Press, (1999).

[18] Kamal M M, Buhidma I M, Pressure-transient analysis for a well with multiple horizontal sections[R], SPE 26444, (1993).

DOI: 10.2118/26444-ms

[19] Li Qingyang, Theorem of numerical calculation [M], Peking: Tsinghua University Press, (2000).

[20] Feng Jianhu, Theorem of numerical analysis, Beijing: Science Press, (2003).