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Drilling fluid-fluid loss additive prepared from landfill leachate and preparation method thereof

A technology of landfill leachate and fluid loss reducing agent, applied in chemical instruments and methods, drilling composition and other directions, can solve the problem of unstable fluid loss of drilling fluid performance, complex formation structure, and inability to obtain oil and gas resources well Mining and service issues, to achieve the effect of maintaining temperature resistance, broadening the scope of application, and reducing consumption

Inactive Publication Date: 2017-06-13
FUZHOU UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the increasing shortage of oil resources and the increasing demand for oil in people's production and life, the development of oil and gas in deep wells and ultra-deep wells has become inevitable. However, due to the high downhole temperature and pressure of deep wells and ultra-deep wells, the formation structure is relatively complex During the drilling process, high-pressure oil and gas layers and brine layers are often encountered. Because people have not been able to find a better solution to the technical problems of unstable drilling fluid performance and high filtration volume, there are often problems during drilling operations. Due to the great inconvenience, the oil and gas resources in deep formations cannot be well exploited and used to serve human beings. Therefore, the study of high-temperature drilling fluids, especially the development of oilfield chemical fluid loss control agents, has become an important issue that needs to be solved urgently.

Method used

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  • Drilling fluid-fluid loss additive prepared from landfill leachate and preparation method thereof
  • Drilling fluid-fluid loss additive prepared from landfill leachate and preparation method thereof
  • Drilling fluid-fluid loss additive prepared from landfill leachate and preparation method thereof

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preparation example Construction

[0022] A kind of preparation method of the drilling fluid fluid loss control agent that utilizes landfill leachate to prepare, it comprises the following steps:

[0023] Step S1: Add the concentrated landfill leachate to the concentrated sulfuric acid according to the mass ratio of the concentrated landfill leachate to concentrated sulfuric acid at a ratio of 5 to 10:1, and adjust the temperature of the reaction system to 140 to 180°C for constant temperature reaction 3 After ~6 hours, filter out the solid matter in the mixed solution and wash it repeatedly with distilled water. When the pH of the washed water is neutral, dry the solid matter to obtain sulfonated humic acid;

[0024] Step S2: Weigh 115 to 210 parts of the sulfonated humic acid prepared above and add it to 75 to 115 parts of organic solvent for dissolution, then add 50 to 85 parts of fatty acid amide, and under the protective atmosphere of continuous feeding of nitrogen, the Adjust the temperature of the reacti...

Embodiment 1

[0029] A kind of preparation method of the drilling fluid fluid loss control agent that utilizes landfill leachate to prepare, it comprises the following steps:

[0030] Step S1: Add 400 parts of landfill leachate concentrate with a solid content of 15% to 80 parts of concentrated sulfuric acid, adjust the temperature of the reaction system to 140°C for constant temperature reaction for 5 hours, filter out the solid matter in the mixed solution and use Repeated washing with distilled water, when the pH of the washed water is neutral, the solid matter can be dried to obtain sulfonated humic acid;

[0031] Step S2: Weigh 200 parts of the sulfonated humic acid prepared above and add it to 115 parts of liquid paraffin for dissolution, then add 50 parts of fatty acid amide, and adjust the temperature of the reaction system to 140 ℃ for 0.5h;

[0032] Step S3: Add the reaction product of step S2 together with 80 parts of dibromomethane and 75 parts of epichlorohydrin into the react...

Embodiment 2

[0034] A kind of preparation method of the drilling fluid fluid loss control agent that utilizes landfill leachate to prepare, it comprises the following steps:

[0035] Step S1: Add 450 parts of landfill leachate concentrate with a solid content of 30% to 75 parts of concentrated sulfuric acid, adjust the temperature of the reaction system to 155°C for 4.5 hours, filter out the solid matter in the mixed solution and use Repeated washing with distilled water, when the pH of the washed water is neutral, the solid matter can be dried to obtain sulfonated humic acid;

[0036] Step S2: Weigh 200 parts of the sulfonated humic acid prepared above and add it to 85 parts of white oil for dissolution, then add 55 parts of fatty acid amide, and adjust the temperature of the reaction system to 145 ℃ to react for 1h;

[0037] Step S3: Add the reaction product of step S2 together with 80 parts of dibromomethane and 55 parts of epichlorohydrin into the reactor, and carry out the mixed reac...

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Abstract

The invention discloses a drilling-fluid fluid loss additive prepared from landfill leachate and a preparation method thereof. Concentrated landfill leachate is added into sulphuric acid to perform sulfonation and dehydration for obtaining sulfonated humic acid; then, the sulfonated humic acid is added into an organic solvent to perform dissolution; in addition, fatty acid amide is added; the reaction is performed under the condition of 140 to 170 DEG C for 0.5 to 2h; then, dibromomethane and epichlorohydrin are added for mixed reaction for 2 to 4h; finally, the prepared products are subjected to vacuum drying under the condition of 75 to 120 DEG C; the required drilling-fluid fluid loss additive can be prepared. The method provided by the invention has the advantages that the flow process is simple; the fluid loss effect is good; the high-temperature resistance can be realized; the landfill leachate is used as raw materials; the waste materials are changed into valuable materials in the real sense; the practical use value and social values are realized.

Description

technical field [0001] The invention belongs to the technical field of chemical drilling fluid treatment in oilfields, and in particular relates to an effective drilling fluid fluid loss control agent prepared from landfill leachate and a preparation method thereof. Background technique [0002] With the increasing shortage of oil resources and the increasing demand for oil in people's production and life, the development of oil and gas in deep wells and ultra-deep wells has become inevitable. However, due to the high downhole temperature and pressure of deep wells and ultra-deep wells, the formation structure is relatively complex During the drilling process, high-pressure oil and gas layers and brine layers are often encountered. Because people have not been able to find a better solution to the technical problems of unstable drilling fluid performance and high filtration volume, there are often problems during drilling operations. Due to the great inconvenience, the oil a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/32C08H99/00
CPCC09K8/03C08H99/00C09K8/32
Inventor 刘明华王晖强刘以凡林春香刘登周
Owner FUZHOU UNIV
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