SAGD (steam-assisted gravity drainage) super-heavy oil high-temperature flash-evaporation dehydration method

A technology for flash dehydration and super-heavy oil, which is applied in the fields of hydrocarbon oil dehydration, dehydration/demulsification by chemical methods, etc. The effect of thinner consumption, shorter dehydration time, and less equipment

Active Publication Date: 2010-06-16
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a SAGD high-temperature crude oil flash dehydration method, which solves the problems of low energy

Method used

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  • SAGD (steam-assisted gravity drainage) super-heavy oil high-temperature flash-evaporation dehydration method
  • SAGD (steam-assisted gravity drainage) super-heavy oil high-temperature flash-evaporation dehydration method

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Embodiment Construction

[0009] In the attached picture:

[0010] The production fluid 1 of SAGD high-temperature ultra-heavy oil from the well station is degassed and collected and transported into the three-phase separator 4 with a multi-stage centrifugal pump. Before the production fluid enters the three-phase separator 4, it is first added by the dosing device 2 The high-temperature demulsifier of 200mg / l~300mg / l enters the inlet pipeline of the three-phase separator 4, and at the same time, the high-temperature sampling device 3 is used to sample and analyze the water content of the produced liquid, and an inert gas of a certain pressure is added to the three-phase separator 4, Make the pressure in the three-phase separator 4 higher than the saturated vapor pressure of water at the dehydration temperature by 0.1MPa to 0.3MPa, and the production fluid added with the demulsifier is settled in the three-phase separator 4 for 1hr to 3hr to achieve preliminary oil-water separation and demulsification s...

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Abstract

The invention relates to an SAGD (steam-assisted gravity drainage) high-temperature crude oil flash-evaporation dehydration method, which ensures that crude oil reaches crude oil index requirements after a produced liquid is dehydrated by utilizing the characteristic of high per se temperature (larger than 140 DEG C) of SAGD super-heavy oil and adopting a high-temperature flash-evaporation method. A process flow implemented by the method comprises a chemical feeder, a high-temperature sampling device, a three-phase separator, a flash-evaporation dehydrator, a clean water tank, a sewage exportation pump, a sewage exportation pipeline, a heavy oil exportation pump, a crude oil exportation pipeline, a natural gas exportation pipeline and the like. The method solves the problems of low utilization rate of crude oil energy, high diluent consumption, high power consumption, and poor economic performance existing in a traditional dehydration technology; and the SAGD high-temperature crude oil flash-evaporation dehydration method can be widely applied to the gathering and transportation dehydration treatment of heavy steam-assisted gravity drainage crude oil.

Description

Technical field: [0001] The invention relates to a high-temperature flash dehydration method for gathering, transporting and dehydrating high-temperature crude oil of heavy oil steam assisted gravity drainage (abbreviated as SAGD). Background technique: [0002] In the crude oil gathering and transportation process of SAGD exploitation in heavy oil fields, crude oil needs to be dehydrated. At present, the diluent dehydration process and the thermochemical sedimentation dehydration process in large tanks at room temperature are usually used on site. The diluent-mixed dehydration process is super-heavy oil mixed with thin crude oil or top oil through pressure chemical sedimentation + electric dehydration process. Its disadvantages are not only low energy utilization rate, large consumption of diluent, but also a large amount of extra electric energy. It is not conducive to improving economic efficiency. The thermochemical sedimentation dehydration process in large tanks at r...

Claims

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Application Information

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IPC IPC(8): C10G7/04C10G33/04
Inventor 李泽勤周立峰李刚周谊苑华
Owner BC P INC CHINA NAT PETROLEUM CORP
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