Reservoir Evaluation and Development ›› 2018, Vol. 8 ›› Issue (2): 47-51.

• Reservoir Evaluation • Previous Articles     Next Articles

Research on well test model of power law fluid in quadruple media heavy oil reservoir

Xu Youjie,Liu Qiguo,Qi Shengzhi,Liu Guihong,Liu Dan   

  1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2017-04-28 Online:2018-04-30 Published:2018-04-30


In the case of the carbonate heavy oil reservoir with the well developed dissolution fracture, the percolation mechanism of dissolution fracture is different from that of fracture. The conventional well test models can not meet the needs of the well test analysis. In the heavy oil reservoir with quadruple media. According to the basic principle of the seepage flow mechanics, the quadruple-media well test mathematical model based on the fracture, dissolution fracture, dissolution pore and matrix is established in heavy oil treating as the power-law fluid. By means of the Laplace transformation and Stehfest numerical inversion, we obtained the real space solution, and drew the well test curves of three different boundary conditions. The results show that three concaves with different depths and widths occur in the pressure derivative curves of the quardrule-media reservoir and the slope of pressure derivative double-log curve is(1-n)/(3-n) in the stage of radial flow. The smaller the power-law index is, the greater the slope of pressure-derivative curve of radial flow will be. The smaller the storativity ratio is, the wider the concave will be, furthermore, the greater the interporosity flow coefficient is, the ealier the concaves will appear. Compared to the thriple-media, the change of the pressure-derivative curve affected by many parameters is more sensitive in the heavy oil reservoir with quadruple-media. The model is used to guide the interpretation and study of the well test data .

Key words: heavy oil, power law fluid, carbonate rock, well test analysis, quadruple-media

CLC Number: 

  • TE331.1