A Calculation Method for Determining High Pressure Physical Parameters of Foam Oil

Abstract

A calculation method for determining high-pressure physical parameters of foamy oil is used to characterize the ability of heavy oil to capture gas in reduced pressure production of a foamy oil reservoir and reflect the magnitude of the ability of heavy oil to produce foamy oil. A series of calculation formulas for determining foamy oil dissolved gas-oil ratio, compression coefficient, volume coefficient, density and viscosity in balanced state are formed; high-pressure physical parameters of non-balanced foamy oil under bubble point pressure are determined by establishing function relationship between the high-pressure physical parameters and balance time in balanced state and the high-pressure physical parameters and different static times in non-balanced state; finally, foamy oil dissolved gas-oil ratio, compression coefficient, volume coefficient, density and viscosity under different static times and pressures are determined; therefore, the high-pressure physical parameters of foamy oil in balanced and non-balanced states are determined quickly and accurately. The calculation method according to the invention is significant to the calculation of heavy oil reservoir capacities, the selection of exploiting modes, gathering and transportation design of oil-gas well surface engineering, the formulation of exploitation schemes and the like.

Description

technical field [0001] The invention relates to a calculation method for determining high-pressure physical property parameters of foam oil, belonging to the technical field of heavy oil reservoir development. Background technique [0002] Heavy oil resources are very rich in the world, accounting for more than one-third of the total oil and gas resources. my country's proven and controlled reserves are more than 1.9 billion tons, mainly distributed in more than a dozen oil fields such as Liaohe, Xinjiang, and Shengli. In addition, with the internationalization of my country's oil and gas exploration and development, a large number of foreign heavy oil resources need to be developed urgently. Therefore, at a time when conventional oil and gas exploration and development are becoming more and more difficult and energy conflicts are becoming increasingly prominent, vigorously developing heavy oil resources is in line with the national economic development strategy. [0003] ...

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Problems solved by technology

[0005] ①Because the experimental sample is heavy oil and the gas is difficult to dissolve, a long stirring time is required to prepare the experimental formation sample

However, the applicability of the above formula to special heavy oil (which can produce foam oil phenomenon) needs to be further evaluated, and there is still a lack of a systematic calculation method for calculating the high-pressure physical properties of foam oil in the non-equilibrium state

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