Method for preparing emulsion by simulating stratum shearing through reciprocating shearing, simulated emulsion and application of simulated emulsion

A technique for simulating formations and emulsions, used in the preparation of samples for testing, testing material strength using a stable shear force, analysis of suspensions and porous materials, etc. , it is difficult to achieve viscosity reduction and other problems

Active Publication Date: 2021-04-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shear rate in the formation porous medium is relatively low (generally 1-100s -1 ), can not form oil-in-water emulsion, it is difficult to achieve viscosity reduction

Method used

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  • Method for preparing emulsion by simulating stratum shearing through reciprocating shearing, simulated emulsion and application of simulated emulsion
  • Method for preparing emulsion by simulating stratum shearing through reciprocating shearing, simulated emulsion and application of simulated emulsion
  • Method for preparing emulsion by simulating stratum shearing through reciprocating shearing, simulated emulsion and application of simulated emulsion

Examples

Experimental program
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Embodiment 1

[0046] This embodiment provides a device for simulating formation tunnels with a porous plate, figure 1 with figure 2 are the top view and side view of the device, respectively. The device specifically includes: a constant temperature box 9 , a mixing pipe 3 , a driving motor 12 , a transmission rod 1 and a perforated plate 2 .

[0047] The incubator 9 is provided with a cavity inside and a base 10 outside. The mixing pipe 3 , the transmission rod 1 and the perforated plate 2 are all located inside the incubator 9 . The mixing pipe 3 is fixed at the bottom of the inner chamber of the incubator through the first bracket 11-1 and the second bracket 11-2. Drive motor 12 is located at the outside of thermostatic box, easy to operate.

[0048] The material mixing pipe 3 is a pipe body with openings at both ends, a first baffle plate 4-1 is provided on one end opening, and a second baffle plate 4-2 is provided on the other end opening. One end of the first baffle 4-1 is provid...

Embodiment 2

[0053] This embodiment provides a method for preparing an emulsion by reciprocating shear simulation formation shear, which is carried out in the device of Example 1, and specifically includes the following process:

[0054] Select a mixing tube with a volume of 200ml, add 24g of oil well emulsion dehydration and crude oil 96g of oil well emulsion to separate water, the mass ratio of oil well emulsion dehydrated crude oil and oil well emulsion to separate water is 2:8, close the first valve of the liquid inlet, Start the driving motor to make the transmission rod and the perforated plate do a reciprocating shearing motion. After 4 hours, a simulated emulsion is formed in the mixing tube. When it is necessary to test the simulated emulsion, the driving motor is turned off, the second valve of the liquid outlet is opened, and the simulated emulsion is taken out.

[0055] Among them, the shear frequency of the perforated plate is determined according to the following process:

...

Embodiment 3

[0067] This embodiment provides a method for preparing an emulsion by simulating formation shearing. In this method, 72 g of a viscosity reducer aqueous solution with a mass concentration of 0.1% is used to replace 96 g of the oil well emulsion water in Example 2, and the dehydrated crude oil of the oil well emulsion is 48 g. The operation and parameters were the same as in Example 2 to obtain a simulated emulsion containing a viscosity reducer.

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Abstract

The invention provides a method for preparing an emulsion by simulating stratum shearing through reciprocating shearing, the simulated emulsion and application of the simulated emulsion. The method comprises the following steps: putting raw materials into a mixing pipe, and performing reciprocating shear motion in the raw materials in the mixing pipe by utilizing a porous plate to obtain the simulated emulsion, wherein in the reciprocating shearing motion, the relationship among the shearing rate, the shearing frequency, the shearing amplitude, the diameter of the perforated plate and the number of the holes is as follows: gamma is the pore channel shearing rate, s<-1>, and f are the shearing frequency, times / min; A is the shearing amplitude, cm; D is the hole diameter of the perforated plate and is cm; and n is the number of holes in the perforated plate. The invention also provides the simulated emulsion which is prepared by the method. The invention further provides the application of the simulated emulsion in evaluating the performance of an emulsifying viscosity reducer and a demulsifier. According to the method, the forming process of the emulsion under the stratum condition can be simulated, and the accuracy and reliability of the evaluation result of the viscosity reducer and other reagents can be improved.

Description

technical field [0001] The invention relates to the technical field of emulsion processing, in particular to a method for preparing an emulsion by reciprocating shearing simulated stratum shearing, the simulated emulsion and its application. Background technique [0002] There is an emulsion in crude oil, and the emulsion needs to be processed in the follow-up, that is, the crude oil is dehydrated to make it reach the commodity index. Therefore, it is necessary to study the emulsification process of the emulsion in crude oil, mainly to prepare crude oil / water emulsion according to the actual process of emulsification behavior. , this research is the basis for subsequent development of ground demulsification purification technology and emulsion supporting treatment technology. [0003] At present, high-speed shearing or ultrasonic treatment of oil-water mixed solution is commonly used in the laboratory to prepare oil-water emulsion. "Research on New Surface-Active Oil-displa...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N3/24G01N1/28
CPCG01N15/08G01N3/24G01N1/28
Inventor 张付生刘国良林军贾财华李雪凝马春宝刘广友肖家宏
Owner PETROCHINA CO LTD
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