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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it still has many deficiencies in complex operation areas such as high temperature and high salt calcium, and the performance index of water loss reduction is difficult to meet the construction requirements.

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

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preparation example Construction

[0043] Simultaneously, the present invention provides a kind of preparation method of anti-high temperature organic phosphonic acid polymer fluid loss reducer, comprising the following steps: mixing isopropene phosphonic acid monomer, acrylamide monomer and monomer containing sulfonic acid group in Polymerization under the action of an initiator, and then neutralized with sodium hydroxide or potassium hydroxide to obtain a high temperature resistant organic phosphonic acid polymer fluid loss reducer;

[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, high-salt calcium formations, the present invention researches and prepares a high-temperature resistant orga...

Embodiment 1

[0058] Mix isopropenylphosphonic acid (IPPA) with acrylamide (AM) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) according to the material 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 mass of the monomer mixture was prepared with a 2.0% initiator aqueous solution.

[0059] Add the monomer mixture solution into the reaction kettle, pass in argon to evacuate the air in the system, and raise the temperature to 60°C; add the aqueous initiator solution into the reaction kettle in batches, and the addition speed is determined by the temperature of the reaction kettle. Over 90°C shall prevail; after adding the initiator aqueous solution, raise the temperature of the system to 80°C and react for 2 hours. After the reaction, neutralize the system with sodium hydroxide until the pH value is 8, and the obtained product is dried and pulverized , tha...

Embodiment 2～11

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

[0063] The substance consumption and reaction condition of polymerization reaction among the embodiment 2~11 of table 1

[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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