Reservoir Evaluation and Development ›› 2018, Vol. 8 ›› Issue (2): 63-67.

• Petroleum Engineering • Previous Articles     Next Articles

Study on applicability of trilinear flow model for multistage fractured horizontal well

Liu Qiguo1,Cen Xuefang1,Li Longxin2,Lu Heng1,Jin Jiyan1   

  1. 1.College of Petroleum Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China
    2. Research Institute of Exploration and Development, PetroChina Southwest Oil and Gas Field Company, Chengdu, Sichuan 610041, China
  • Received:2017-06-13 Online:2018-04-30 Published:2018-04-30


A trilinear flow model is one of the common methods solving the well test models for the multistage fractured horizontal wells. By the orthogonal test, the range analysis method and the variance analysis method, we analyzed the influence of the half fracture length, the half reservoir thickness, the width of the inner zone, the dimensionless fracture conductivity and the permeability in inner zone on the double log curves fitting of the pressure and the pressure derivative of the trilinear flow model and numerical model. According to this analysis, the factors affecting the curves of the pressure characteristic curves of two models ranged from more to less are the dimensionless fracture conductivity(FCD), the permeability in inner zone(kI), the half fracture length(xf), the half reservoir thickness(xe)and the width of inner zone(ye). The fracture conductivity affect obviously on the fitting of the pressure characteristic curves of two models. When the fracture conductivity is less than 1, the curve fitting effect is poor, so the linear flow model is not applicable. Otherwise, when the fracture conductivity is greater than 1, the curve fitting effect is good, so the linear flow model is suitable.

Key words: fractured horizontal well, trilinear flow, applicability, orthogonal test

CLC Number: 

  • TE373