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Edition and Publication:
< Natural Gas and Oil > Editorial Department
Hosted by:
China Petroleum Engineering & Construction Corporation Southwest Company
Authorized by:
China Petroleum Engineering & Construction Corporation
Co-hosted by:
Overseas Research Center of Research Institute of Petroleum Exploration and Development
Editor in Chief:
Du Tonglin
Vice Editor in Chief:
Tang Xiaoyong,Pu Liming
Address:
No.6, Shenghua Road, High-tech District, Chengdu, Sichuan, China
Postal Code:
610041
Tel:
028-86014709
028-86014500
Email:
cnpc-ngo@cnpc.com.cn
Issue:ISSN 1006-5539
CN 51-1183/TE

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Research on Controlling Slot Height of Fracturing Technology in Thin lnterbedded Layer of Gasi Oilfield

Author of the article:Xu Chaolan, Tan Peng

Author's Workplace：Petroleum Engineering College, China University of Petroleum(Beijing)

Key Words：Thin interbed reservoirs; Fracturing; Fracture height; Artificial barriers; Control fracture-height fracturing

Abstract：Low permeability thin interbed reservoir has such characteristics as poor reservoir property, thin effective thickness, developed natural fractures and lower difference of stress between formations and barriers and hydraulic fracturing technology is an important means of putting into production in commission or increasing production for such reservoirs. However, main technical difficulties of the fracturing technology lie in thin target layer and poor sheltering capacity of interlayers, which will make the hydraulic treatment break the interlayers easily and increase the layer-to-layer heterogeneity. Conducted is analysis on factors likely affecting the height of artificial fractures in Qinghai Casi Oilfield, researched is the adaptability of variable fracture-height control technique, finally selected is an appropriate one and carried out is optimization design test of artificial barrier technology on Well X in this oilfield. The simulation results show that the fracture height is controlled effectively, which changes from 18.0m of conventional fracturing to 12.9m. This method can be used in similar oilfield design.