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Method or dynamically measuring precipitation amount of asphaltene generated through CO2-crude oil action

A technology for dynamic determination of asphaltenes, which is used in measurement devices, chemical analysis by precipitation, monitoring of particle agglomeration, etc., can solve the problems of complex equipment, high cost, long time consumption, etc., and achieves convenient operation, simple device and low cost. Effect

Inactive Publication Date: 2017-09-29
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PVT kettle experiment takes a long time, and the static balance test of the ancient kiln focuses on normal temperature and pressure conditions. The optical analysis and frequency image analysis obtain indirect signals, and the real situation of asphaltene cannot be observed, and the equipment is extremely complicated and expensive.

Method used

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  • Method or dynamically measuring precipitation amount of asphaltene generated through CO2-crude oil action
  • Method or dynamically measuring precipitation amount of asphaltene generated through CO2-crude oil action
  • Method or dynamically measuring precipitation amount of asphaltene generated through CO2-crude oil action

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Dynamic measurement of CO 2 -The method of generating asphaltene precipitation by the action of crude oil: Utilize the first ISCO pump 1 to pour the crude oil into the reactor 3 through the crude oil piston container 2, and then use the second ISCO pump 5 to pass the CO 2 Piston container 4 will CO 2 Pass into the reactor 3, and use the second ISCO pump 5 to control the CO 2 Real-time observation of crude oil-CO through CCD camera and computer 2 layer, and use image analysis software to measure the area of ​​asphaltene precipitation and the size distribution of particles, and use the indirect measurement of asphaltene deposition to measure the amount of sediment under a small amount of reservoir conditions. The asphaltene deposition image is calibrated, and the linear relationship between the deposition coverage ratio in the image and the asphaltene deposition amount is established.

[0020] The above determination method is based on the dynamic determination of CO ...

Embodiment 2

[0022] Dynamic measurement of CO 2 -The method of generating asphaltene precipitation by the action of crude oil: Utilize the first ISCO pump 1 to pour the crude oil into the reactor 3 through the crude oil piston container 2, and then use the second ISCO pump 5 to pass the CO 2 Piston container 4 will CO 2 Pass into the reactor 3, and use the second ISCO pump 5 to control the CO 2 Real-time observation of crude oil-CO through CCD camera and computer 2 layer, and use image analysis software to measure the area of ​​asphaltene precipitation and the size distribution of particles, and use the indirect measurement of asphaltene deposition to measure the amount of sediment under a small amount of reservoir conditions. The asphaltene deposition image is calibrated, and the linear relationship between the deposition coverage ratio in the image and the asphaltene deposition amount is established.

[0023] The above determination method is based on the dynamic determination of CO ...

Embodiment 3

[0026] Dynamic measurement of CO 2 -The method of generating asphaltene precipitation by the action of crude oil: Utilize the first ISCO pump 1 to pour the crude oil into the reactor 3 through the crude oil piston container 2, and then use the second ISCO pump 5 to pass the CO 2 Piston container 4 will CO 2 Pass into the reactor 3, and use the second ISCO pump 5 to control the CO 2 Real-time observation of crude oil-CO through CCD camera and computer 2 layer, and use image analysis software to measure the area of ​​asphaltene precipitation and the size distribution of particles, and use the indirect measurement of asphaltene deposition to measure the amount of sediment under a small amount of reservoir conditions. The asphaltene deposition image is calibrated, and the linear relationship between the deposition coverage ratio in the image and the asphaltene deposition amount is established.

[0027] The above determination method is based on the dynamic determination of CO ...

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Abstract

The invention provides a method or dynamically measuring the precipitation amount of asphaltene generated through CO2-crude oil action. The method comprises the steps of injecting crude oil into a reaction kettle through a crude oil piston container by using a first ISCO pump; introducing CO2 into the reaction kettle through a CO2 piston container by using a second ISCO pump and controlling the pressure intensity of the CO2 by using the second ISCO pump; observing an image of a crude oil-CO2 layer in real time through a CCD camera and a computer and measuring the area of asphaltene precipitation and the size distribution of particles by using image analysis software, measuring the precipitation amount under the condition of a small amount of reservoir through an indirect measurement method of the asphaltene precipitation amount; and calibrating an asphaltene precipitation image obtained in a previous experiment through the measured values and building a linear relationship between the precipitation coverage ratio and the asphaltene precipitation amount in the image.

Description

technical field [0001] The invention relates to the technical field of crude oil recovery, in particular to a method for dynamically measuring CO 2 -The method of crude oil action to generate asphaltene precipitation. Background technique [0002] CO 2 Flooding is a very effective method of enhancing oil recovery, which can not only effectively enhance oil recovery, but also significantly reduce greenhouse gas emissions. in CO 2 After injection into the reservoir, CO 2 It will cause flocculation and precipitation of asphaltene in crude oil, and the precipitated asphaltene will also block the rock pore throat, reduce porosity and permeability, and change the wettability of rock. 2 Flooding has an impact on enhanced oil recovery. Determination of CO 2 CO during flooding 2 The amount of asphaltene precipitation caused by the interaction with crude oil is the key to the study. [0003] During carbon dioxide displacement, CO 2 The dissolution of crude oil causes many cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/02G01N15/02G01N15/00G01N15/04G01B11/28
CPCG01N31/02G01B11/28G01N15/00G01N15/0227G01N15/04G01N2015/0092
Inventor 赵东锋殷丹丹竺柏康高建丰宋付权
Owner ZHEJIANG OCEAN UNIV
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