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Method for detecting comprehensive water content of crude oil of high-water-content single well

A detection method and moisture content technology, applied in the direction of measuring devices, material inspection products, instruments, etc., can solve the problems of volatilization of toxic and harmful substances of benzene, complex operation, high detection cost, etc.

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the course of research, the inventors found that the determination of the comprehensive water content of crude oil based on the distillation method has the following problems: First, there are many steps and the operation is complicated
Specifically, the distillation method to determine the comprehensive water content of crude oil includes at least 8 steps, of which 3 steps involve weighing; second, the analysis time is long, and the detection time of a single sample can be as long as 1 hour; third, the raw material consumption is large , The cost is high, the distillation method needs to use a large amount of solvent gasoline in the process of measuring water content, and the amount of each sample is (100-200) mL, resulting in high detection costs; moreover, the process of heating solvent gasoline may cause benzene poisonous and harmful The substance volatilizes, which poses a potential threat to the health of the inspectors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The present invention provides a method for detecting the comprehensive water content of crude oil in a single well with high water content. Specifically, the method for detecting the comprehensive water content of crude oil in a single well with high water content includes the following steps:

[0024] Step 1: Sampling and measuring the free water content H of a high water-cut single well;

[0025] First, the free water content H of a single well with high water cut was sampled and measured. Among them, free water refers to the part of water existing in the crude oil mixture in free form (different from emulsified water and crystal water). Preferably, the process of sampling and measuring the free water content H of a high water-cut single well is realized by using a conventional gravimetric method.

[0026] The reason why the effective application period of the free water content H of a high water-cut single well is set is because the inventors found that in the actu...

Embodiment 2

[0039] Embodiment two includes all the technical features in embodiment one, that is, the method for detecting the comprehensive water content of crude oil in a single well with high water cut includes the following steps:

[0040] Step 1: Sampling and measuring the free water content H of a high water-cut single well;

[0041] First, the free water content H of a single well with high water cut was sampled and measured. Among them, free water refers to the part of water existing in the crude oil mixture in free form (different from emulsified water and crystal water). Preferably, the process of sampling and measuring the free water content H of a high water-cut single well is realized by using a conventional gravimetric method.

[0042] The reason why the effective application period of the free water content H of a high water-cut single well is set is because the inventors found that in the actual application process, the amplitude and frequency of data change of different ...

Embodiment 3

[0060] Embodiment three includes all the technical features in embodiment one, that is, the method for detecting the comprehensive water content of crude oil in a single well with high water cut includes the following steps:

[0061] Step 1: Sampling and measuring the free water content H of a high water-cut single well;

[0062] First, the free water content H of a single well with high water cut was sampled and measured. Among them, free water refers to the part of water existing in the crude oil mixture in free form (different from emulsified water and crystal water). Preferably, the process of sampling and measuring the free water content H of a high water-cut single well is realized by using a conventional gravimetric method.

[0063] The reason why the effective application period of the free water content H of a high water-cut single well is set is because the inventors found that in the actual application process, the amplitude and frequency of data change of differen...

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Abstract

The invention belongs to the technical field of oil field single well water content detection, and particularly relates to a high-water-content single well crude oil comprehensive water content detection method. The method for detecting the comprehensive moisture content of the crude oil of the high-water-content single well can simplify the comprehensive moisture content detection process of the crude oil of the high-water-content single well, improve the efficiency of the comprehensive moisture content detection work, effectively reduce the detection and analysis cost and have high application value. The method for detecting the comprehensive moisture content of the crude oil of the high-water-content single well comprises the steps of sampling and measuring the free moisture content H of the high-water-content single well, sampling and measuring the emulsified moisture content h of the high-water-content single well, calculating to obtain the actual comprehensive moisture content psi of the high-water-content single well, and calculating to obtain the comprehensive moisture content psi'of the high-water-content single well under a theoretical model. And calculating an absolute error sigma between the actual comprehensive water content psi of the high-water-content single well and the comprehensive water content psi'of the high-water-content single well under the theoretical model.

Description

technical field [0001] The invention belongs to the technical field of detecting the water content of a single well in an oil field, and in particular relates to a method for detecting the comprehensive water content of crude oil in a single well with high water content. Background technique [0002] At present, the methods for comprehensive water content detection of crude oil for high water-cut single wells in oil fields mainly include distillation, centrifugation, and electro-stripping, among which distillation is the most widely used. However, the inventor found in the course of research that the determination of the comprehensive water content of crude oil based on the distillation method has the following problems: First, there are many steps and the operation is complicated. Specifically, the distillation method to determine the comprehensive water content of crude oil includes at least 8 steps, of which 3 steps involve weighing; second, the analysis time is long, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/28
CPCG01N33/2823
Inventor 李乾龚争辉韩卓贾丽曼郑宁李洁
Owner CHINA PETROLEUM & CHEM CORP
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