Limited Entry Fracturing Design and Optimization for Thin-Interbedded Low-Permeability Reservoir

Abstract:

Limited entry fracturing technique is an effective method to stimulate low-permeability reservoirs. Especially for thin-interbedded reservoirs, this technique can, to a large extent, save fracturing operation cost and improve effectively stimulation degree of oil layers. In order to get targeted operations, various influence factors should be taken into account, to further optimize limited entry fracturing frame. Low-permeability thin interbedded reservoirs being featured with low permeability, multiple and thin layers, the numerical simulation method is applied to analyze the effect of perforation number and formation parameters, including minimum principal stress, pay thickness, permeability and porosity, on entry flow rate and fracture geometries. Through simulation, we find: the higher minimum principal stress, which is the main factor affecting proppant length, the shorter the proppant length; the thicker the pay zone or the more the perforation number, the larger the proppant width, while pay zone thickness and perforation number are the main factors affecting proppant width; the more the perforation number, which has the largest effect on proppant height, the larger the proppant height. Nonetheless, permeability and porosity has minor effects on fracture geometries.

• Periodical: Advanced Materials Research (Volumes 361-363)
• Pages: 473-478
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.361-363.473
• Online since: October 2011
• Authors: Ya Hong Wu, Hui Yang
• Keywords: Design Optimization, Limited Entry Fracturing, Low-Permeability, Perforation Scheme, Thin Interbed

References

[1] Wang Hongxun, Zhang Shicheng. Numerical method for hydrofracture design[M].Beijing, Petroleum Industry Press, 269~280 (1998).

[2] Gu H, Desroches J and Elbel J L. Computer simulation of multilayer hydraulic fractures[R]. SPE 64789, (2000).

DOI: 10.2118/64789-ms

[3] Guo Jianchun, Yang Lijun, Zhao Jinzhou, ect. Improved calculation model and its application for perforation friction during fracturing.[J]. Natural Gas Industry, 25(5):69~71, (2005).

[4] Wang Qin, Zhang Shicheng, Chen Haodong. Study of limited-entry fracturing techniques[J]. Chongqing Science and Technology Institute( Natural Science Edition), 11(1):41~43, (2009).

[5] Xie Fengmeng, Jin Hua, Wang Changling,etc. Study of limited-entry design and numerical simulation methods[J]. Petroleum Drilling and Exploration Technology, 35(2):62~66, (2007).

[6] Zhang Shicheng, Wang Shigui, Zhang Guoliang, etc. perforation scheme design optimization for limited-entry fracturing[J]. Petrolem Drilling Technics, 22(2):60~63, (2000).

[7] Elbel J L, Piggott A R, and Mack M G. Numerical modeling of multilayer fracture treatments[R]. SPE 23982, (1992).

DOI: 10.2118/23982-ms

[8] Cao Liyan, Zhang Yongchun, Dong Jianhua. Optimization of pore arrangement with limited entry fracturing[J].Petrolem Geology and Oilfield Development in Daqing, 20(4): 47~49, (2001).

[9] Wang Xingwen, Ren Shan, Song Yangao. Study on the distance between pay zones in multi-layer and zonal fracturing[J].Natural Gas Industry, 29(2):92~94, (2001).