%0 Journal Article
%A LIU Guotao
%A SHI Zhengnan
%A SUN Xiaona
%A YAN Zhenghe
%A XIE Mingying
%T Calculation of the Investigation Radius of Producing Well Through Power Law Heavy Oil Sand Reservoir
%D
%R 10.11885/j.issn.1674-5086.2021.02.08.08
%J Journal of Southwest Petroleum University(Science & Technology Edition)
%P 97-106
%V 45
%N 2
%X The investigation radius is an important parameter in oilfield development. However, the well-known formula of the investigation radius is based on the linear fluid flowing in porous medium, so the formula is out of place for nonlinear fluid, such as power-law fluid. Recently the sand oilfields with power law fluid are discovered in the eastern South China Sea. Based on this, a new numerical method is proposed for studying the investigation radius of power-law heavy oil. This new method avoids the problem of trying to obtain the analytical formula of the investigation radius, and it has wider applicability. On the other hand, the well-known formula does not consider the influence of wellbore storage effect and skin effect. With the help of the relative criterion of investigation radius, using Laplace transform and Stehfest numerical inversion, the influence of power-law index, wellbore storage effect and skin effect on investigation radius is studied by a new method here. A formula for calculating the investigation radius with power-law index between 0.80 and 1.00 is proposed, and the unified form of the formula is formed. At the same time, the relationship between investigation radius and bottom hole pressure drop is also explored. The research results have been used for guiding the optimization design well pattern and injection-production well pattern, and good application results are obtained.
%U http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2021.02.08.08