Quantitative description method for steam channeling passageway in steam injection process of heavy oil reservoir

Abstract

The invention relates to a quantitative description method for a steam channeling passageway in a steam injection process of a heavy oil reservoir. The method comprise the steps of identifying steam channeling degree of each production well in a steam driving well group and determining a steam channeling type of each production well; and calculating steam channeling volume in the steam driving well group according to the steam channeling type of each production well in the steam driving well group and different production well feature parameters. According to the quantitative description method for the steam channeling passageway in the steam injection process of the heavy oil reservoir, the steam channeling degree of all production wells in the steam driving well group is defined and classified, the steam channeling passageway volume of multidirection steam channeling in the injection and production well group is finally solved, the steam channeling passageway volume is calculated according to a quantitative and operable technical method and implementation steps, and the method can be widely applied to the field of steam injection development and research for land and seaborne heavy oil reservoirs.

Description

technical field [0001] The invention belongs to the field of oil and gas field development, in particular to a method for quantitatively describing steam channeling channels during steam injection in heavy oil reservoirs. Background technique [0002] After multi-cycle steam huff and puff in heavy oil reservoirs, steam channeling is prone to occur due to different working systems of production wells. After the transition to steam flooding, with the continuous deepening of steam flooding, the phenomenon of one-way or multi-directional channeling between injection and production wells has become more prominent, and steam channeling has become the main contradiction restricting the production effect of steam flooding. In addition to geological factors such as differences in reservoir heterogeneity and sand production, the causes of steam channeling also include the large difference in mobility ratio between steam and heavy oil, the formation of low flow resistance channels betw...

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Problems solved by technology

[0004] However, the above methods have exposed some shortcomings: 1) lack of comprehensive consideration of geological factors and production dynamic factors that cause steam channeling; 2) lack of effective judgment on the degree of steam channeling in production wells in Differential Calculation of Steam Channeling Channels in Production Wells with Different Degrees of Steam Channeling in Injector-Producer Well Groups

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