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High-pressure condensate oil field natural gas gathering and transportation method, device and gathering and transportation system

A natural gas and oil field technology, applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as high maintenance and salvage costs, high initial investment, and large pollution, and reduce the risk of hydrate freezing and blocking. Good economic and environmental benefits, and the effect of reducing production costs

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wellhead heating and throttling process can realize gas well throttling and depressurization transportation, and the energy consumption is high, and the utilization rate of the heating furnace is low during the later pressurization, and the initial investment is high; the wellhead methanol injection high-pressure gathering and transportation efficiency is high, but the alcohol recovery cost High pollution, high pollution; downhole throttling can effectively realize the medium and low pressure gas collection mode without injecting alcohol into the wellhead gas, but the throttle is short in validity, easy to damage, high maintenance and salvage costs, and affects production

Method used

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  • High-pressure condensate oil field natural gas gathering and transportation method, device and gathering and transportation system
  • High-pressure condensate oil field natural gas gathering and transportation method, device and gathering and transportation system
  • High-pressure condensate oil field natural gas gathering and transportation method, device and gathering and transportation system

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Embodiment 1

[0032] This embodiment mainly illustrates the technical principle of the method of the present invention.

[0033] This embodiment provides a method for gathering and transporting natural gas in a high-pressure condensate oil field, which is characterized in that it includes:

[0034] Step a: Obtain the target parameters of the mixed fluid produced in the oilfield at the wellhead of the oilfield. The mixed fluid includes natural gas, water and condensate oil.

[0035] Specifically, the high-pressure condensate oil field is a special oil field, and its output is a mixed fluid with multiple components, including natural gas, water, and condensate oil. The target parameters include flow rate, pressure and temperature; wherein, the flow rate includes the total flow rate of the mixed fluid and the flow rates of the individual fluids that make up the mixed fluid.

[0036] Step b: Determine the diameter of the delivery pipeline according to the target parameters and the delivery dis...

Embodiment 2

[0047] This embodiment mainly describes the process of the actual simulation analysis performed according to the method of the present invention, and the simulation analysis is based on the multiphase flow transient simulation analysis software OLGA.

[0048] Step a: Obtain and input the flow rate of the mixed fluid, the pressure at the starting point and the end point of the delivery, and the temperature at the starting point;

[0049] Specifically, the input oil phase flow rate is 53m3 / d, the water phase flow rate is 18m3 / d, the gas phase flow rate is 1.9×104m3 / d, the starting point pressure is 6.4Mpa, the ending point pressure is 4MPa or the starting point pressure is 10Mpa, and the ending point pressure is 8Mpa, The starting temperature was 29°C.

[0050] Step b: According to the relevant parameters input in step a, determine that the pipe diameter of the delivery pipeline is 80mm, and the pipe length is 10km;

[0051] Step c: The multiphase flow transient simulation anal...

Embodiment 3

[0057] This embodiment provides a natural gas gathering and transportation device, which applies the above-mentioned natural gas gathering and transportation method, which includes:

[0058] The delivery pipeline, one end of the delivery pipeline is connected to the wellhead of the oil field;

[0059] The feeding mechanism is arranged at the wellhead connected to the oil field on the conveying pipeline, and the feeding mechanism is used for adding polymerization inhibitor to the mixed fluid in the conveying pipeline.

[0060] Specifically, the delivery pipeline is directly connected to the wellhead without other structures in between, thereby reducing the complexity of the delivery structure, and at the same time making full use of the pressure energy at the wellhead to reduce energy consumption for delivery. At the same time, the natural gas gathering and transportation device of this embodiment applies the above-mentioned natural gas gathering and transportation method, and ...

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Abstract

The invention provides a high-pressure gas condensate field natural gas gathering and transportation method, device and gathering and transportation system. The method comprises the steps that a, target parameters of mixed fluid produced by an oil field at an oil field wellhead are obtained; b, the pipe diameter of a conveying pipeline is determined according to the target parameters and the conveying distance of the mixed fluid; c, the mixed fluid is guided to enter the conveying pipeline, and natural gas hydrate particles are formed in the mixed fluid in the conveying pipeline; and d, the natural gas hydrate particles flow along the conveying pipeline along with the mixed fluid to be conveyed. Based on the technical scheme, pressure energy of a high-pressure wellhead of the high-pressure condensate oil field is fully utilized, conveying energy consumption is reduced, an adaptive pressure environment is provided for generation of the natural gas hydrate particles, meanwhile, the generation amount of the natural gas hydrate particles is controlled by controlling the pipe diameter of the conveying pipeline, and the production efficiency is improved. And the risk of hydrate freezing blockage of the mixed transportation pipeline is reduced.

Description

technical field [0001] The invention relates to the technical field of natural gas transportation, in particular to a high-pressure condensate oil field natural gas collection and transportation method, device and collection and transportation system. Background technique [0002] At present, my country is in the period of great development of natural gas. The energy saving and consumption reduction of natural gas gathering and transportation system is conducive to the maximization of the benefits of natural gas production, which is directly related to the cost investment and economic benefits of the entire gas field production. Common natural gas gathering and transportation technologies mainly include wellhead heating throttling, wellhead alcohol injection high-pressure gathering and transportation, and downhole throttling. The wellhead heating and throttling process can realize gas well throttling and depressurization transportation, and the energy consumption is high, an...

Claims

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Application Information

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IPC IPC(8): F17D1/00F17D3/01
CPCF17D1/005F17D3/01
Inventor 丁垚徐孝轩郑友林陈从磊魏蓓刘德生王莉莉
Owner CHINA PETROLEUM & CHEM CORP