Oil Field Development Planning Optimization And Evaluation

Most oil fields in China today have been in the mid-later stage of development programming, they are faced with all kinds of problems such as political, economic and technologic problems: How to keep up the stable production, meet with the demand of oil production that national economic development needs (political factor); To determine the development programming project according to the oil field itself dynamic transformation rule (technologic factor); To obtain the maximum production with the minimum cost, that is to say to seek for the best economical benefit of oil field (economic factor). These three problems above are the crucial problems that oil field development programming faces and need to be solved. Therefore nearly all oil fields put "development programming" the very important place.This paper researches the basic statistical rule of oil-gas dynamic system from the systematic theory, combining with the common characteristic and structure characteristic of oil-gas dynamic system, taking the design requirement of oil field development programming into consideration, by using of functional simulation principle (including NN method, differential simulation method) and historical data of oil field, establishes the in-out conjunctional relationship of dynamic index of oil field development, and researches the two level index prediction of development dynamic with both oil field and oil production plant on the basis of the in-out conjunctional relationship. Furthermore, this paper analyzes the "decision-making variable", "object" and "restriction terms" by the optimization theory and set up several optimal models which compose the oil field development programming, it is following: Optimization model of the production composing (solving the optimal composing of each subentry production and corresponding cost, workload, including the onshore thin oil production, the heavy oil thermal process production, tertiary oil recovery production, and the offshore production); Optimization model of measure production structure (determining the optimal composing of each measure production and measure workload, which is composed of fracture, acidulation, capital repair and so on); Optimization model of the production distraction (optimal distribution of the whole oil field production to each oil production plant) and the integrated development programming model of oil field. Finally, the paper adopts similar figures method and fuzzy comprehensive evaluation to give the selection and order of the integral development programming projects of oil field.