Decision-making method for dynamically optimizing wellbore heating parameters

Abstract

The invention provides a decision-making method for dynamically optimizing wellbore heating parameters. The decision-making method for dynamically optimizing wellbore heating parameters comprises thesteps that 1, establishing a wellbore temperature field model and a wellbore pressure field model; 2, optimizing the heating parameters of the electric heating process and the closed hot water circulation heating process in the same production period by using the shaft heating operation parameters measured on site; and 3, concluding production rules of different periods in combination with historical production data of the oil well, and optimizing heating parameters of different production periods. According to the decision-making method for dynamically optimizing the wellbore heating parameters, dynamic optimization is conducted on an oil well under the condition that the water content and the liquid production capacity of the oil well in different production periods constantly change, high pertinence and reliability are achieved, field workers can be guided to adjust the parameters of the oil well more accurately, and blind parameter adjustment of the oil well by the field workers isavoided.

Description

technical field [0001] The invention relates to the field of wellbore thermal viscosity reduction in the petroleum industry, in particular to a decision-making method for dynamically optimizing wellbore heating parameters. Background technique [0002] In the process of heavy oil production, due to the influence of factors such as wellbore temperature and water content, the viscosity of heavy oil will change sharply and gradually lose its fluidity. Part of the heavy oil cannot be lifted to the ground and cannot meet the production requirements of oil wells. In order to solve the above problems, wellbore matching heating technology is usually used to reduce the viscosity of heavy oil and meet the needs of oilfield production. At present, the most commonly used wellbore viscosity reduction technology in the process of heavy oil production mainly includes electric heating and closed thermal fluid circulation technology, but at present, the optimization of electric heating opera...

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Problems solved by technology

At present, the most commonly used wellbore viscosity reduction technology in the process of heavy oil production mainly includes electric heating and closed thermal fluid circulation technology, but at present, the optimization of electric heating operating parameters mainly depends on the observation of the up and down changes of the polished rod. Although the closed circulation heating technology Compared with electric heating, the power consumption is greatly reduced, but there is still room for optimization in the optimization of operating parameters such as circulation depth and wellhead circulating fluid temperature, and different heavy oil wells and the same well in different production stages have large differences in liquid volume, water content, and crude oil viscosity , the choice of the correct heating method is also affected by many factors. The critical heating conditions for each well under different liquid production rates, different crude oil viscosities, and different water contents are not targeted, and field workers cannot get accurate results even through optimization analysis. Heating power and water injection temperature, etc.

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