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Simulation method for performance research of CO2 intelligent response type temperature-resistant and salt-resistant tertiary amine foam system

A foam system and simulation method technology, applied in chemical instruments and methods, drilling composition, design optimization/simulation, etc., can solve the response mechanism, the mechanism of temperature resistance and salt resistance has no clear explanation, and ordinary foam cannot realize intelligence Response, poor temperature resistance and salt resistance, etc., to achieve fast calculation, good foam stability, good foam stability and response performance

Active Publication Date: 2021-09-24
DONGYING SPRING PETROLEUM ENG TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned existing technologies have made some progress, and the problems of ordinary foams that cannot achieve intelligent response, poor defoaming effect, and poor temperature and salt resistance have been improved to a certain extent.
However, no molecular simulation methods have been used to study CO 2 Reports on the nature and mechanism of intelligent responsive foams have no clear explanations for the response mechanism, temperature resistance and salt resistance mechanism

Method used

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  • Simulation method for performance research of CO2 intelligent response type temperature-resistant and salt-resistant tertiary amine foam system
  • Simulation method for performance research of CO2 intelligent response type temperature-resistant and salt-resistant tertiary amine foam system
  • Simulation method for performance research of CO2 intelligent response type temperature-resistant and salt-resistant tertiary amine foam system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as image 3 As shown, under the conditions of temperature 298K and salinity 0mg / L, the design of SDS / D-3-TEDTA 2 foam system:

[0057] 1) Build the initial model

[0058] Use the Sketch tool in the Materials Studio software to construct the tertiary amine surfactant molecule N-dodecyl-N,N-dimethyl tertiary amine (C 12 A), traditional anionic surfactant molecules sodium dodecyl sulfate (SDS) and water molecules, by adding 1 temperature-resistant group thiophene group, 3 salt-resistant group ethoxy groups to tertiary amine surfactants Molecule N-dodecyl-N,N-dimethyl tertiary amine (C 12 A) Modified design to obtain D-3-TEDTA 2; use Amorphous Cell tool and build layer tool to compound 36 SDS and 36 D-3-TEDTA2 1:1 and mix with 2042 water molecules to construct SDS / D-3-The initial interface model of the TEDTA 2 foam system. Box size is 4.368×4.368×3.2nm 3 , add a 5nm vacuum layer on the upper and lower sides of the box.

[0059] 2) Optimizing the initial interfac...

Embodiment 2

[0066] Such as Figure 4 As shown, under the conditions of temperature 363K and salinity 0mg / L, the design of SDS / D-3-TEDTA2 foam system:

[0067] 1) Build the initial model

[0068] Use the Sketch tool in the Materials Studio software to construct the tertiary amine surfactant molecule N-dodecyl-N,N-dimethyl tertiary amine (C 12 A), traditional anionic surfactant molecules sodium dodecyl sulfate (SDS) and water molecules, by adding 1 temperature-resistant group thiophene group, 3 salt-resistant group ethoxy groups to tertiary amine surfactants Molecule N-dodecyl-N,N-dimethyl tertiary amine (C 12 A) Modified design to obtain D-3-TEDTA 2; use Amorphous Cell tool and build layer tool to compound 36 SDS and 36 D-3-TEDTA 2 1:1 and mix with 2042 water molecules to construct The initial interface model of the SDS / D-3-TEDTA 2 foam system. Box size is 4.368×4.368×3.2nm 3 , add a 5nm vacuum layer on the upper and lower sides of the box.

[0069] 2) Optimizing the initial interfac...

Embodiment 3

[0076] Such as Figure 5 As shown, under the conditions of temperature 298K and salinity 200000mg / L, the design of SDS / D-3-TEDTA 2 foam system:

[0077] 1) Build the initial model

[0078] Use the Sketch tool in the Materials Studio software to construct the tertiary amine surfactant molecule N-dodecyl-N,N-dimethyl tertiary amine (C 12 A), traditional anionic surfactant molecules sodium dodecyl sulfate (SDS), water molecules and inorganic salt ions, by adding 1 temperature-resistant group thiophene group, 3 salt-resistant group ethoxy groups for tertiary Amine surfactant molecule N-dodecyl-N,N-dimethyl tertiary amine (C 12 A) Modified design to obtain D-3-TEDTA 2; use AmorphousCell tool and build layer tool to carry out 1:1 compounding of 36 SDS and 36 D-3-TEDTA 2 and mix with 2042 water molecules, 200000mg / L Salinity of inorganic salt ions (100 Na + , 6 Mg 2+ , 6 Ca 2+ , 124 Cl - ) to build the initial interface model of the SDS / D-3-TEDTA 2 foam system. Box size is 4....

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Abstract

The invention discloses a simulation method for performance research of a CO2 intelligent response type temperature-resistant and salt-resistant tertiary amine foam system, and belongs to the technical field of oil and gas field chemistry. The simulation method comprises the following steps: firstly, constructing an initial configuration of a foam system through Materials Studio software, and secondly, carrying out optimization and molecular dynamics calculation on the foam system through a Forcite module; and finally, investigating the foam performance, response performance, mechanism, temperature resistance and salt resistance of the tertiary amine foam system through parameters such as interface configuration, a relative concentration distribution curve, a radial distribution function, a mean square displacement curve, interaction energy and the like. The simulation method provided by the invention can explain surfactant stable foam from a microscopic perspective, realizes response and temperature-resistant and salt-resistant mechanisms, and provides certain theoretical guidance for experimental research of a CO2 intelligent response type temperature-resistant and salt-resistant foam system and construction of oil and gas fields under different working conditions.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field chemistry, in particular to a CO 2 A simulation method for the performance research of intelligent response temperature-resistant and salt-resistant tertiary amine foam system. Background technique [0002] In recent years, with the continuous development of gas fields, most of the gas wells in China have experienced the phenomenon of wellbore fluid accumulation, resulting in the decline of gas production and other problems, which have a serious impact on the development and production of gas fields. In order to solve this problem, drainage gas recovery techniques such as foam drainage gas recovery, gas lift drainage gas recovery, and optimized string drainage gas recovery have been widely used. Among these processes, the foam drainage gas recovery process has become the most effective method in the drainage gas recovery process because of its low cost and simple process, and the number...

Claims

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Application Information

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IPC IPC(8): G16C10/00G06F30/20C09K8/594C09K8/584G06F119/08G06F119/14
CPCG16C10/00G06F30/20C09K8/584C09K8/594G06F2119/08G06F2119/14
Inventor 孙春同孙霜青任海宁孙永强任平平孙志强胡松青
Owner DONGYING SPRING PETROLEUM ENG TECH
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