Natural gas well intelligent exploitation control method and device

Abstract

The invention discloses an intelligent exploitation control method and device for a natural gas well, and the method comprises the steps: judging whether the pressure of a sleeve or the pressure of an oil pipe is stable or not after the countdown of the minimum well shut-in time is completed; when the pressure is stable, a valve on the gas production tree is controlled to open a well, and when the pressure is unstable, the valve on the gas production tree is controlled to open the well after the maximum well closing time is completed; by controlling the opening degree of a valve on the gas production tree, the instantaneous flow rate of the collection flow meter is larger than the liquid carrying flow rate; judging whether liquid passes through the pipeline or not; when liquid passes through, the wellhead pressure is controlled to be smaller than the cut-off pressure of the cut-off valve to increase the opening degree of the valve on the gas production tree, so that the liquid in the pipeline passes through; and when the average flow is smaller than the liquid carrying flow, a valve on the gas production tree is controlled to close the well, or when the casing pressure micro-rise value is larger than the casing pressure micro-rise value threshold value, the valve on the gas production tree is controlled to close the well. The time efficiency of opening and closing the well is improved, the liquid carrying capacity of the gas well is guaranteed, and the valve on the gas production tree is prevented from being frozen and blocked.

Description

technical field [0001] The invention relates to the technical field of oil and gas field exploitation, in particular to an intelligent exploitation control method and device for natural gas wells. Background technique [0002] With the extension of the production life of natural gas wells, most gas wells begin to enter the middle and late stages, and the pressure and production capacity are generally low, which cannot meet the liquid-carrying requirements in the production process of gas wells, resulting in liquid accumulation at the bottom of the gas well or in the wellbore, which seriously affects Continuous and stable production of gas wells. Combined with the current natural gas collection requirements, the following problems exist in the existing extraction mode: [0003] (1) There are a large number of natural gas wells, a wide distribution, and a lack of management personnel, so the goal of refined management of gas wells cannot be achieved. [0004] (2) Relying on ...

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Problems solved by technology

[0003] (1) The number of natural gas wells is large, the distribution is wide, and the management personnel are lacking, so the goal of refined management of gas wells cannot be achieved

[0004] (2) Relying on manual experience to judge the timing of switching wells has high requirements and dependence on gas well management personnel, and the switching is affected by weather, external cooperation and other reasons, and the goal of high production efficiency of gas wells cannot be achieved

[0005] (3) It is impossible to effectively monitor whether the gas well carries liquid during the well opening process. If artificial on-site monitoring is used, it will require the investment of personnel and vehicle costs, and will also increase the labor intensity of employees

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