Heavy Oil Reservoirs Economically Recoverable Reserves Calculation Method Study

Investment in heavy oil development projects is higher, risk is higher, feasibility and merits of the project depends not only on technology, advanced and feasible, and the resulting performance is more important is the economic level of rationality and efficiency. It whether the project has commercial value, economically viable. It is economically recoverable reserves are in various stages of development reflect the economic value of reservoir storage and industrial exploitation of the value for economic and efficient development of heavy oil to provide a reasonable scientific basis.This article draws results of previous studies, large number of documents in the investigation and comprehensive analysis, based on heavy oil reservoir for the previous calculation of the economic limitations of recoverable reserves, proposed an improved economic recoverable reserves of heavy oil reservoir calculation.Economically recoverable reserves is affected by many factors of the comprehensive economic indicators, this article from the geological factors, development of technology, economic factors, technological progress in four areas, Systematic and comprehensive detail the impact of economically recoverable reserves of heavy oil reservoir of twenty factors, scientific configuration and reasonable control of these factors is to improve the economically recoverable reserves effective way.Calculation of economically recoverable reserves of the main methods of cash flow method, economic limit watercut method, economic limit GOR method,economic production time method, economic limit well density method, production decline curve method and the analogism method, according to the seven different calculation methods applicable conditions, after induction of the preparation of a complete set of heavy oil economically recoverable reserves calculated series of tables, Established the exploitation of heavy oil at different stages of economic calculation methods of recoverable reserves.Through the dual perspective of technical and economic analysis of selected economic recoverable reserves of the seven main factors. On this basis, using the gray relational analysis of the economic model of recoverable reserves for feasibility study, Gray relational algorithm based on economically recoverable reserves of the factors affecting the correlation analysis, The relationship between various factors of economically recoverable reserves through the establishment of the mathematical model.Contact an oil field geological characteristics of each area, development and exploration profile, Using different methods of calculation of the oil region's economic analysis of recoverable reserves compared, The results show that the combination of gray relational analysis of error than the other algorithms is relatively little, Closer to the real value, further confirmed the usefulness of this method.