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Dehydration emulsion breaker for collected liquid of intermediate base crude oil

A technology for intermediate base crude oil and produced fluid, which is applied in the fields of hydrocarbon oil dehydration/demulsification, petroleum industry, etc., and can solve the problems of large dosage, large energy consumption, etc.

Active Publication Date: 2008-12-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used demulsifiers have a large amount of dosing on site; in addition, during the compound production, the polyether needs to be heated with water steam before it can be pumped into the polymerization tank. At the same time, the compound needs to be carried out under a certain temperature and pressure, which consumes a lot energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] One, the preparation of A surfactant

[0024] First, put the phenolic resin with a weight percentage of 42% of the intermediate PEA as the starter in a stainless steel reactor, start stirring, heat up to 125±5°C, evacuate, fill with nitrogen, and slowly add 58% by weight of propylene oxide. The reaction pressure is controlled at 0.12-0.40 MPa. After the dropwise addition is completed, after the pressure in the reactor returns to zero, the temperature is lowered and the material is discharged to obtain the intermediate PEA.

[0025] The intermediate PEA with a weight ratio of 45% and the sodium hydroxide with a weight ratio of 0.15% are placed in a stainless steel reaction kettle to prepare A surfactant, and the temperature is raised to 120 ± 5 ° C, evacuated and filled with nitrogen. Use 1.25 Slowly add ethylene oxide with a weight ratio of 53.45% in 1 hour, and then slowly add epichlorohydrin with a weight ratio of 1.4% in 0.6 hours. The reaction pressure is controlle...

Embodiment 2、3、4

[0035] Intermediate crude oil production fluid dehydration demulsifier preparation Examples 2, 3, 4 The preparation process is basically the same as that of Example 1, the difference is the formula. The formula for the preparation of the intermediate base crude oil production fluid dehydration demulsifier preparation embodiment 1-4 is expressed in a tabular manner, and the list is as follows:

[0036] Table 1: Preparation formula of intermediate crude oil production fluid dehydration demulsifier

[0037] project

Dry agent C weight %

Water weight %

Example 1

50

50

Example 2

46

54

Example 3

53

47

Example 4

61

49

[0038] Table 2: Recipe for Preparation of Dry Agent C

[0039] project

A surfactant

B surfactant

Polydimethylsiloxane

Example 1

44

54.5

1.5

Example 2

40.4

58.4

1.2

Example 3

52.5

...

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PUM

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Abstract

This invention discloses a method for preparing dehydration and demulsification agent for the extracted liquid of intermediate base crude oil. The method comprises: preparing two kinds of surfactants, placing the surfactants and polydimethylsiloxan in a reaction kettle, reacting at a certain temperature for a certain time to obtain a dry agent, placing the dry agent in a mixing kettle, and dropping water slowly to obtain the dehydration and demulsification agent, which has better performance than present dehydration and demulsification agents. After dehydration, the crude oil has water content less than 0.1%, and the wastewater has oil content less than 50 mg / l.

Description

Technical field [0001] The invention relates to the technical field of oil well production fluid dehydration, in particular to an intermediate crude oil production fluid dehydration demulsifier and a preparation method thereof. Background technique [0002] Oil well production fluid needs to be dehydrated. In order to make the dehydrated crude oil reach the standard of high-quality oil for export, the dehydrated sewage meet the standard standard, and reduce the cost of demulsification and dehydration of crude oil, technicians have developed many types of demulsifiers for on-site technical problems. Many crude oil demulsification and dehydration problems have been solved, but some technical problems have been ignored. For example, the currently used demulsifiers are polyethers with amines, resins, and phenolic aldehydes as initiators, which are compounded with a certain amount of methanol and water at a certain temperature and pressure. The currently used demulsifiers have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/00
Inventor 付亚荣蔡远红马永忠田炜刘建华李冬青
Owner PETROCHINA CO LTD
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