RESEARCH ARTICLE


Productivity Prediction Model of Vertical Artificial Fracture Well and Analysis of Influence Factor in Low Permeability Reservoir



Chengli Zhang*, 1, Dezhi Liang1, Daiyin Yin1, Guoliang Song2
1 Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Northeast Petroleum University1, Daqing, 163318, China
2 College of Mathematics and Statistics, Northeast Petroleum University, Daqing, 163318, China


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© 2015 Zhang et al.;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Correspondence: * Address correspondence to this author at the College of Petroleum Engineering, Northeast Petroleum University, Daqing, 163318, China.


Abstract

Based on the analysis of seepage mechanism of fracturing wells in low permeability reservoir, this paper establishes the capacity model of the vertical fractured well production under the factors of Start-up pressure gradient, pressure sensitive effect and the artificial fracture length. The numerical simulation is compiled and software calculates the capacity model by using numerical simulation. This simulation technique verifies the validity of the model and numerical method. On this basis, we study the influence of the included angle of artificial fracture and well array direction, artificial fracture length, start-up pressure gradient and production pressure difference to the capacity of the oil well.

Keywords: low permeability reservoirs, the capacity equation of the vertical fractured well, fracture length, start-up pressure gradient, well array direction.