Method and system for recognizing water consuming layer band of oil reservoir in high water cut period
A technology of high water cut period and identification method, which is applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve the problems of inability to effectively guide the design of regulation and control schemes, poor characterization of high water consumption zones, etc., to achieve easy acquisition, Improve the effect of representation and strong operability
Active Publication Date: 2019-12-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
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[0004]
The above technical solutions can only roughly determine whether there is a high water consumption zone in a certain well group, but the characterization effect on the high water consumption zone is poor, so the above technical solution cannot effectively guide the control scheme design of the subsequent oilfield development stage
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[0043] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0044] Due to the high water cut period (usually the high water cut period in reservoir engineering can be divided into three stages with different water cuts: the high water cut period with a water cut of 80%-90%, the extra high water cut period with a water cut above 90% , and the late stage of ultra-high water cut with a water content of more than 95%, especially in the late stage of ultra-high water cut), the high water-consumption zone is generally developed in the reservoir, which causes a large amount of injected water to be inefficient and ineffective in circulation, which significantly intensifies the dynamics of the reservoir Heterogeneity enlarges the...
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The invention relates to the technical field of oil-gas field development, and discloses a method and system for recognizing a water consuming layer band of oil reservoir in a high water cut period. The recognizing method comprises the steps that the production performance of oil wells and water wells is fit through an oil reservoir numerical value simulator based on the geological data of a target area in the oil reservoir in the high water cut period and the production performance data of the oil wells and the water wells in the target area to obtain an oil reservoir numerical value simulation model; the recognition coefficients of each water well and the water consuming layer band located among the oil wells around the water wells are calculated based on the oil reservoir numerical value simulation model; and the development grade of the water consuming layer band is recognized based on the recognition coefficient of the water consuming layer band. According to the method and system, the development grade of the water consuming layer band can be fast judged and quantitatively characterized, and therefore the development direction of the high water consuming layer band can be effectively recognized, and an effective guiding function is achieved on design of the regulation and control scheme of the subsequent oilfield development stage.
Description
technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to an identification method and an identification system for water-consuming zones of oil reservoirs in high water-cut periods. Background technique [0002] After years of water injection development, most oilfields in my country have entered the stage of high / ultra-high water-cut development, and some oilfields have even entered the late stage of ultra-high water-cut (water content higher than 95%), resulting in the widespread development of high water-consumption zones. This makes a large amount of injected water inefficient and ineffective in circulation, significantly aggravates the dynamic heterogeneity of the reservoir, and expands the contradictions within and between layers, which in turn leads to the reduction of water flooding efficiency in the oilfield, the difficulty in implementing production stimulation measures, and the increase in development co...
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Login to View More IPC IPC(8): E21B49/00E21B41/00
CPCE21B49/00
Inventor 王森冯其红朱奇赵光赵蕴昌
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)