A downhole throttling process parameter calculation method for a gas well with a high liquid-gas ratio

A technology of process parameters and calculation methods, applied in the directions of calculation, electrical digital data processing, design optimization/simulation, etc., can solve the problems that the calculation results of the throttling process parameters do not conform to the calculation results, and the liquid production volume is not considered, so as to meet the requirements of continuous liquid discharge. Stabilize production requirements, improve drainage effect, and prevent hydrate formation

Active Publication Date: 2019-04-09
PETROLEUM ENG TECH RES INST CHINA PETROLEUM & CHEM CORP NORTH CHINA OIL & GAS CO +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for calculating downhole throttling process parameters for gas wells with high liquid-gas ratio, to solve the problem that the existing downhole throttling technology does not consider production The influence of liquid volume leads to the problem that the calculation result of throttling process parameters does not meet the actual demand

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  • A downhole throttling process parameter calculation method for a gas well with a high liquid-gas ratio
  • A downhole throttling process parameter calculation method for a gas well with a high liquid-gas ratio
  • A downhole throttling process parameter calculation method for a gas well with a high liquid-gas ratio

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[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] The invention provides a simple and convenient design method for downhole throttling process parameters suitable for two-phase flow. It is obtained through technical calculation; while the present invention considers the influence of liquid column pressure drop when calculating the choke mouth diameter, and corrects the influence of liquid production on choke pressure difference and wellbore liquid carrying, and the calculation of choke mouth diameter is more accurate. Reasonable and more realistic, it not only effectively prevents the formation of hydrates, but also effectively improves the liquid drainage effect, meets the requirements for continuous liquid drainage and stable production of high liquid-gas ratio gas wells, and effectively guides on-site production.

[0028] In order to achieve the above, the present invention provides a method for ca...

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Abstract

The invention relates to the technical field of downhole throttling, in particular to a downhole throttling technological parameter calculation method for a high-liquid-gas-ratio gas well. According to the method, the defect that a single-phase fluid underground throttling model does not consider the influence of the liquid production amount on the throttling pressure difference is overcome; The factor of liquid column pressure drop is introduced in the process of optimizing the nozzle diameter of the throttler, generation of hydrates is effectively prevented and controlled, the liquid drainage effect is improved, the requirement for continuous liquid drainage and stable production of a gas well with the high liquid-gas ratio is met, field production is effectively guided, the calculationprocess is simple and convenient, and field operation is easy.

Description

technical field [0001] The invention relates to the technical field of downhole throttling, in particular to a method for calculating downhole throttling process parameters for gas wells with high liquid-gas ratio. Background technique [0002] Natural gas is a multi-component mixed gaseous fossil fuel. It is easy to form natural gas hydrate under high pressure and low temperature conditions, and natural gas hydrate is easy to block pipelines. To raise the temperature or reduce the pressure, the downhole throttling technology is used on site to throttle and reduce the pressure of the natural gas in the pipeline. The downhole throttling technology is to install the throttle at the proper position of the oil pipe, so that the throttling, decompression and expansion process of natural gas occurs in the well, and at the same time, the throttled airflow is heated by the ground temperature, so that the temperature of the throttled airflow can be greatly improved. The recovery is ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 周舰王锦昌陈付虎刘岳龙周瑞立陈旭赵润冬李璇谭苗张立强
Owner PETROLEUM ENG TECH RES INST CHINA PETROLEUM & CHEM CORP NORTH CHINA OIL & GAS CO
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