The production well temperature monitoring based analytical model for the quantitative description of SAGD stream chamber

During the SAGD development of Fengcheng super heavy oil reservoir, the producing degree of horizontal section is low and the expansion of steam chamber is not uniform. To solve these problems, this paper obtained the semi-log curve slope of the temperature coefficient (T*) of horizontal production well by means of heat transfer theory and formula derivation, which is the exponential relation between temperature drop coefficient (m) and steam chamber volume. Then, through the numerical simulation fitting of a1 well group in Fengcheng A Well Block, the temperature drop coefficient (m) of each temperature monitoring point was calculated, and the exponential relation expression between temperature drop coefficient (m) and its corresponding steam chamber volume was regressed. Finally, the applicability of this expression was verified by using the measurement data of the neighboring well. It is indicated that the numerical simulation result is basically accordant with the calculation result based on the measurement data of the neighboring well, which proves the stronger applicability of this expression. In practice, this expression can be used directly to describe the shape of steam chamber, so as to provide the guidance for the rapid quantitative description of SAGD steam chamber.