High temperature resistant organic phosphonic acid polymer fluid loss agent, and preparation method and applications thereof

A technology of organic phosphonic acid and fluid loss reducer, which is applied in the field of anti-high temperature drilling fluid fluid loss reducer and its preparation, high temperature resistant organic phosphonic acid polymer fluid loss reducer and its preparation, and can solve the performance index of fluid loss reduction It is difficult to meet the construction requirements and other problems, and achieve the effect of being suitable for industrial application, strong anti-calcium ability, and good filtration loss reduction ability

Pending Publication Date: 2019-06-07
SINOPEC SSC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still has many deficiencies in complex operation areas such as high temperature and high salt ca

Method used

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  • High temperature resistant organic phosphonic acid polymer fluid loss agent, and preparation method and applications thereof
  • High temperature resistant organic phosphonic acid polymer fluid loss agent, and preparation method and applications thereof
  • High temperature resistant organic phosphonic acid polymer fluid loss agent, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] At the same time, the present invention provides a method for preparing a high temperature resistant organic phosphonic acid polymer fluid loss agent, which includes the following steps: isopropylene phosphonic acid monomers, acrylamide monomers and sulfonic acid group-containing monomers The polymerization reaction is carried out under the action of the initiator, and then neutralized with sodium hydroxide or potassium hydroxide to obtain a high temperature resistant organic phosphonic acid polymer fluid loss agent;

[0044] The acrylamide monomer is selected from acrylamide, 2-methacrylamide, N-methacrylamide, N-ethylacrylamide or N,N-dimethylacrylamide; the sulfonic acid group The monomer is selected from 2-acrylamido-2-methylpropanesulfonic acid, p-vinylbenzenesulfonic acid or allylsulfonic acid.

[0045] In order to meet the technical requirements for drilling in high-temperature and high-salt calcium formations, the present invention has researched and prepared a high-...

Example Embodiment

[0057] Example 1

[0058] Mix isopropenyl phosphonic acid (IPPA) with acrylamide (AM) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) in a ratio of 10%: 70%: 20%, and then dissolve In water, a monomer mixture aqueous solution with a mass fraction of 30% was prepared; potassium persulfate accounting for 0.3% of the total monomer mixture mass was prepared into a 2.0% initiator aqueous solution.

[0059] The monomer mixture solution was added to the reaction kettle, argon gas was introduced to evacuate the air in the system, and the temperature was raised to 60°C; the initiator aqueous solution was added to the reaction kettle in batches, and the addition rate was not as high as the reaction kettle temperature. Above 90℃ shall prevail; after the initiator aqueous solution is added, the temperature of the system is raised to 80℃ and reacted for 2 hours. After the reaction, the system is neutralized with sodium hydroxide to pH 8, and the product obtained is dried and crushed , Tha...

Example

[0061] Examples 2-11

[0062] According to the method of Example 1, the organic phosphonic acid polymer fluid loss agent was prepared separately; the different formulas and conditions are shown in Table 1:

[0063] Table 1 Material dosage and reaction conditions of the polymerization reaction in Examples 2-11

[0064]

[0065]

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Abstract

The invention provides a high temperature resistant organic phosphonic acid polymer fluid loss agent, and a preparation method and applications thereof. The preparation method comprises following steps: isopropenyl phosphonic acid monomer, an acrylamide monomer, and a sulfonic acid group-containing monomer are subjected to polymerization under the effect of an initiator so as to obtain the high temperature resistant organic phosphonic acid polymer fluid loss agent; wherein the acrylamide monomer is selected from acrylamide, 2-methacrylamide, N-methacrylamide, N-ethyl acrylamide, or N, N-dimethylacrylamide, the sulfonic acid group-containing monomer is selected from 2-acrylamido-2-methylpropane sulfonic acid, p-vinylbenzenesulphonic acid, or alkyl sulfonate. The high temperature resistant organic phosphonic acid polymer fluid loss agent comprises a first repeat unit with a structure represented by formula 1, a second repeat unit with a structure represented by formula 2, and a third repeat unit with a structure represented by formula 3, can be used for preparing drilling fluid which possesses better temperature resistance and salt resistant, and is suitable for high temperature highsalinity drilling fluid systems.

Description

technical field [0001] The invention belongs to the technical field of chemical drilling fluid treatment agents for oilfields, and relates to a high-temperature-resistant drilling fluid fluid loss reducer and a preparation method thereof, in particular to a high-temperature resistant organic phosphonic acid polymer fluid loss reducer, a preparation method and application thereof. Background technique [0002] In recent years, with the expansion of oil and gas exploration and development areas, the developed oil and gas formations are getting deeper and deeper, and the geological conditions are becoming more and more complex, which poses new challenges to the development of drilling fluid treatment agents. Among them, the drilling fluid fluid loss control agent is one of the most used treatment agents in the drilling process, occupying a core position among all drilling fluid treatment agents, and plays an important role in maintaining stable drilling fluid performance, safe a...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/58C08F230/02C09K8/035
Inventor 李科徐生婧苏雪霞张丽君孙举王中华
Owner SINOPEC SSC
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