Abstract:

Based on H. W. Chen and G. Chavent’s research for matching the history of production in a field by use of optimal control theory and through the research for the space of the adjoint function，we have extended the theory of adjustment for the case of a single—phase system to a Double—phase one. In order to eliminate the shortcomings of the original method, such as multiple solution，liability to overflow，vibrate and converge only to some local minimum in iteration procedure, our work has been concentrated on proper identity and steep convergence of the algorithm. With the improved method, we have made adjustment of parameters and the history matching of fictitious reservoir models and real fields, and got some satisfactory results.