Organic phosphonic acid polymer fluid loss agent, and preparation method and applications thereof
The technology of a fluid loss reducer and an organic phosphonic acid is applied in the field of organic phosphonic acid polymer fluid loss reducer and its preparation, drilling fluid fluid loss reducer and its preparation, and can solve the problem that the water loss reduction performance index is difficult to meet the construction requirements and other problems, to achieve the effect of good applicability, strong complexing ability and simple preparation
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[0035] Simultaneously, the present invention provides a kind of preparation method of organic phosphonic acid polymer fluid loss reducer, comprising the following steps: mixing isopropene phosphonic acid monomer, acrylamide type monomer and carboxylic acid group-containing monomer in initiator Carry out polymerization reaction under action to obtain organic phosphonic acid polymer fluid loss reducer;
[0036] The acrylamide monomer is selected from acrylamide, 2-methacrylamide, N-methacrylamide, N-ethylacrylamide or N,N-dimethylacrylamide; the carboxylic acid group The monomer is selected from acrylic acid or 2-methacrylic acid.
[0037] The invention is based on the polymerization reaction of isopropene phosphonic acid (IPPA) monomers to form organic phosphonic acid polymer materials. Specifically, the present invention uses isopropenylphosphonic acid, acrylamide compounds and compounds containing carboxylic acid groups as monomers for polymerization. Wherein, the acrylamid...
Embodiment 1
[0048] Mix isopropenylphosphonic acid (IPPA) with acrylamide (AM) and acrylic acid (AA) according to the mass ratio of 10%: 70%: 20% to form an aqueous monomer mixture solution with a mass fraction of 30%; Accounting for the total mass of the monomer mixture is 0.3% potassium persulfate to prepare a 2.0% aqueous initiator solution.
[0049] 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 , that is, the phosphine-containing drilling fluid fluid loss reducer is a whi...
Embodiment 2～9
[0052] 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:
[0053] Material consumption and reaction conditions of polymerization reaction in table 1 embodiment 2~9
[0054]
[0055]
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