阅读说明：本技术 一种油基钻井液降滤失剂及制备方法 (Oil-based drilling fluid filtrate reducer and preparation method thereof ) 是由 李奎 汤永昌 胡涛 于 2021-08-13 设计创作，主要内容包括：本发明适用于石油钻井技术领域,提供了一种油基钻井液降滤失剂及制备方法,油基钻井液降滤失剂,包含以下组分：妥尔油脂肪酸,介酸,多乙烯多胺,四乙烯五胺,腐殖酸,氯化亚砜,马来酸。整个降滤失剂中所用的原材料价廉,易于取得,节省了原料的开支。制备方法如下：妥尔油脂肪酸与多乙烯多胺反应,反应温度130℃到190℃,反应时间4小时,再与腐殖酸反应,反应温度120℃到180℃,反应时间2小时,然后在热滚炉中200到250℃脱水1小时。整个的生产工艺路线收率高,副产物少,产品质量符合质量标准,安全可靠；整个生产过程对环境无污染。(The invention is suitable for the technical field of petroleum drilling, and provides an oil-based drilling fluid filtrate reducer and a preparation method thereof, wherein the oil-based drilling fluid filtrate reducer comprises the following components: tall oil fatty acid, mesoacid, polyethylene polyamine, tetraethylenepentamine, humic acid, thionyl chloride and maleic acid. The raw materials used in the whole filtrate reducer are low in price and easy to obtain, and the expenditure of the raw materials is saved. The preparation method comprises the following steps: reacting tall oil fatty acid with polyethylene polyamine at 130-190 deg.C for 4 hr, reacting with humic acid at 120-180 deg.C for 2 hr, and dewatering at 200-250 deg.C for 1 hr. The whole production process route has high yield and few byproducts, and the product quality meets the quality standard and is safe and reliable; the whole production process has no pollution to the environment.)

1. The oil-based drilling fluid filtrate reducer is characterized in that: the catalyst comprises the following components of tall oil fatty acid, mesoacid, polyethylene polyamine, humic acid, tetraethylenepentamine, thionyl chloride and maleic acid, wherein the polyethylene polyamine is preferably tetraethylenepentamine, and the thionyl chloride and the maleic acid are used as catalysts.

2. The oil-based drilling fluid loss additive of claim 1, wherein: preferably: the raw material comprises, by weight, 100-150 parts of tall oil fatty acid, 120-160 parts of polyethylene polyamine, 350-400 parts of humic acid, 5-10 parts of catalyst and 800-1600 parts of water.

3. The preparation method of the oil-based drilling fluid filtrate reducer is characterized by comprising the following steps: the method comprises the following steps:

the method comprises the following steps: uniformly mixing tall oil fatty acid and polyethylene polyamine in proportion, adding the mixture into a reaction kettle, uniformly heating the reaction kettle from room temperature to 130 ℃, and simultaneously controlling the heating rate and the reaction time;

step two: when the temperature of the reaction kettle is raised to 130 ℃, adding a catalyst to carry out solution polymerization reaction, and simultaneously controlling the temperature raising rate and the reaction time to obtain a mixed solution;

step three: adding humic acid into the mixed solution, stirring and mixing the humic acid and the mixed solution, then heating the mixed solution, and controlling the reaction time to obtain viscous liquid;

step four: and (3) carrying out suction filtration on the viscous liquid, then heating in a hot roller furnace for a certain time, cooling and crushing, and then screening to obtain the black powdery filtrate reducer.

4. The method of preparing a fluid loss additive for oil-based drilling fluids of claim 3, wherein: in the first step: uniformly mixing polyethylene polyamine and tall oil fatty acid according to a molar ratio of 1:1, and adding the mixture into a reaction kettle, wherein the polyethylene polyamine is at least one of ethylenediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine and certain ethylene amine, and the tall oil fatty acid is tall oil fatty acid and mesoacid.

5. The method of preparing a fluid loss additive for oil-based drilling fluids of claim 3, wherein: in steps one and two: the tall oil fatty acid and polyethylene polyamine are uniformly mixed, heated to 130 ℃, and then heated from 130 ℃ to 190 ℃ for reaction, wherein the heating rate is 20 ℃ per 90 minutes, and the reaction time is 4 hours.

6. The method of preparing a fluid loss additive for oil-based drilling fluids of claim 3, wherein: in step three: stirring the mixed solution and humic acid for 30-55 minutes.

7. The method of preparing a fluid loss additive for oil-based drilling fluids of claim 3, wherein: in step three: firstly heating to 120 ℃, and then reacting at the constant temperature rise condition of 120-180 ℃, wherein the reaction time is 2 hours.

8. The method of preparing a fluid loss additive for oil-based drilling fluids of claim 3, wherein: in the fourth step: dehydrating in a hot roller furnace at 200-250 deg.C for more than 16 hr.

9. The method of preparing a fluid loss additive for oil-based drilling fluids of claim 3, wherein: in step four: cooling to obtain dark black solid, grinding to 200 meshes, and filtering to obtain the product.

10. The method of preparing a fluid loss additive for oil-based drilling fluids of claim 3, wherein: the oil-based drilling fluid filtrate reducer generates noise in the operation of equipment such as a reaction kettle and the like in the production process, and the noise value range is 70dB (A) -90dB (A).

Technical Field

The invention belongs to the technical field of petroleum drilling, and particularly relates to a filtrate reducer for an oil-based drilling fluid and a preparation method thereof.

Background

The filtrate reducer is used as the type with the largest quantity and variety in the drilling fluid treating agent. At present, the asphalt fluid loss additive is most commonly used, and although the asphalt product used for the fluid loss additive of the oil-based drilling fluid has a good fluid loss reducing effect, the use of the asphalt product affects the mechanical rotating speed due to the fact that a large amount of asphalt is used, and the asphalt is toxic and causes great pollution to the environment, so that the use of the asphalt product is restricted more and more strictly. The humic acid fluid loss additive has the advantages of wide source of humic acid raw materials, low price, less pollution to the environment, better cost performance and better high temperature resistance, and can achieve the same effect as the asphalt fluid loss additive under the condition of using less addition amount, thereby being widely applied to oilfield chemicals.

Disclosure of Invention

The invention provides a fluid loss additive for an oil-based drilling fluid and a preparation method thereof, aiming at solving the problems that the prior most common fluid loss additive is an asphalt fluid loss additive, and although the asphalt product used for the fluid loss additive for the oil-based drilling fluid has better fluid loss reducing effect, the use of the asphalt product affects the mechanical rotating speed due to a large amount of use, and the asphalt is toxic and has large pollution to the environment, so that the use of the asphalt product is more and more strictly limited.

The invention is realized by the fact that the oil-based drilling fluid filtrate reducer comprises the following components of tall oil fatty acid, mesoacid, polyethylene polyamine, tetraethylenepentamine, humic acid, thionyl chloride and maleic acid, wherein the polyethylene polyamine is preferably tetraethylenepentamine, and the thionyl chloride and the maleic acid are used as catalysts.

Preferably: the raw material comprises 100 to 145 parts of tall oil fatty acid, 130 to 200 parts of polyethylene polyamine, 350 to 400 parts of humic acid, 5 to 10 parts of catalyst and 800 to 1600 parts of water in parts by weight.

A preparation method of a fluid loss additive for an oil-based drilling fluid comprises the following steps:

the method comprises the following steps: uniformly mixing tall oil fatty acid and polyethylene polyamine in proportion, adding the mixture into a reaction kettle, heating the reaction kettle from room temperature to 130 ℃, and controlling the reaction time;

step two: adding a catalyst into the reaction kettle at 130 ℃ to perform solution polymerization reaction, and controlling the heating rate and the reaction time to obtain a mixed solution;

step three: adding humic acid into the mixed solution, stirring and mixing the humic acid and the mixed solution, then heating the mixed solution, and controlling the reaction time to obtain viscous liquid;

step four: and (3) carrying out suction filtration on the viscous liquid, then heating in a hot roller furnace for a certain time, cooling and crushing, and then screening to obtain the black powdery filtrate reducer.

Preferably, in step one: adding polyethylene polyamine and tall oil fatty acid into a reaction kettle according to a molar ratio of 1:1, wherein the polyethylene polyamine is at least one of ethylenediamine, diethylenetriamine, triethylene tetramine, tetraethylenepentamine and certain ethylene amine, and the tall oil fatty acid is tall oil fatty acid and mesoacid.

Preferably, in steps one and two: the tall oil fatty acid and the polyethylene polyamine are mixed uniformly according to the molar ratio of 1:1, the mixture is heated to 130 ℃, and then the mixture is heated from 130 ℃ to 190 ℃ for reaction, wherein the heating rate is 20 ℃ per 90 minutes, and the reaction time is 4 hours.

Preferably, in step three: stirring the mixed solution and humic acid for 30-55 minutes.

Preferably, in step three: firstly heating to 120 ℃, and then reacting at a constant temperature of 120-180 ℃ for 2 hours.

Preferably, in step four: dehydrating in a hot roller oven at 200-250 deg.C for 16 hr.

Preferably, in step four: cooling to obtain dark black solid, grinding to 200 meshes, and filtering to obtain the product.

Preferably, the oil-based drilling fluid loss additive generates noise when equipment such as a reaction kettle and the like operates in the production process, and the noise value ranges from 70dB (A) to 90dB (A).

Compared with the prior art, the invention has the beneficial effects that: the oil-based drilling fluid filtrate reducer in the invention and the preparation method comprises the following components: tall oil fatty acid, mesoacid, polyethylene polyamine, tetraethylenepentamine, humic acid and maleic acid. The raw materials used in the whole filtrate reducer are low in price and easy to obtain, and the expenditure of the raw materials is saved.

The preparation method comprises the following steps: reacting tall oil fatty acid with polyethylene polyamine at 130-190 deg.C for 4 hr, reacting with humic acid at 120-180 deg.C for 2 hr, and dewatering at 200-250 deg.C for 16 hr. The whole production process route has high yield and few byproducts, and the product quality meets the quality standard and is safe and reliable; the whole production process has no pollution to the environment.

Drawings

FIG. 1 is a schematic structural view of the present invention;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, the present invention provides a technical solution: a preparation method of a fluid loss additive for an oil-based drilling fluid comprises the following steps:

the method comprises the following steps: uniformly mixing polyethylene polyamine and tall oil fatty acid according to a molar ratio of 1:1, adding the mixture into a reaction kettle, heating the reaction kettle to 130 ℃, heating the reaction kettle from 130 ℃ to 190 ℃ for reaction, wherein the heating rate is 20 ℃ per 90 minutes, and the reaction time is 4 hours; the polyethylene polyamine is at least one of ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine and the like, certain ethylene amine is selected from the group consisting of tall oil fatty acid, mesoacid and the like.

Step two: adding a catalyst into the reaction kettle at 130 ℃ to perform solution polymerization reaction, and controlling the heating rate and the reaction time to obtain a mixed solution;

step three: adding humic acid into the mixed solution, stirring and mixing the humic acid and the mixed solution, wherein the stirring time is 30-55 minutes, heating the mixed solution to 120 ℃, and then reacting the mixed solution at a constant temperature of 120-180 ℃ for 2 hours to obtain viscous liquid;

step four: and (3) carrying out suction filtration on the viscous liquid, then dehydrating for 16 hours in a hot rolling furnace at the temperature of 200-250 ℃, then cooling to obtain a dark black solid, grinding to 200 meshes, and filtering to obtain a black powdery filtrate reducer.

Wherein: the oil-based drilling fluid filtrate reducer generates noise in the operation of equipment such as a reaction kettle and the like in the production process, and the noise value range is 70dB (A) -90dB (A).

The first embodiment is as follows:

the fluid loss additive for the oil-based drilling fluid comprises 105 parts by weight of tall oil fatty acid, 156 parts by weight of tetraethylenepentamine, 374 parts by weight of humic acid, 5 parts by weight of a catalyst and 880 parts by weight of water.

The method comprises the following steps:

fully and uniformly mixing 105 parts of tall oil fatty acid and 156 parts of tetraethylenepentamine, adding 5.5 parts of maleic acid serving as a catalyst, and mixing, stirring and fully reacting to obtain a tall oil amide solution;

adding 74 parts of tall oil amide mixed solution and 880 parts of water into a reaction kettle, setting the temperature to be 60 ℃, mixing and stirring until the mixture is completely dissolved, adding 374 parts of humic acid with the required amount into the reaction kettle, mixing and stirring for 3 hours, performing suction filtration after full reaction, and placing the mixture into a hot rolling furnace to be rolled for 16 hours at 230 ℃ to obtain viscous liquid;

and drying, washing, filtering, drying again, crushing and sieving the viscous liquid in sequence to obtain the filtrate reducer for the oil-based drilling fluid.

Example two:

the fluid loss agent for the oil-based drilling fluid comprises, by weight, 110 parts of a mesoacid, 180 parts of triethylene tetramine, 387 parts of humic acid, 7 parts of a catalyst maleic acid and 1022 parts of water.

The method comprises the following steps:

uniformly and fully mixing 110 parts of a required amount of a mesoacid and 180 parts of triethylene tetramine, adding 6.3 parts of a required amount of a catalyst maleic acid, mixing and stirring, and fully reacting to obtain a tall oil amide solution;

adding 85 parts of tall oil amide mixture and 1022 parts of water into a reaction kettle, setting the temperature to be 60 ℃, mixing and stirring until the mixture is completely dissolved, adding 387 parts of humic acid with the required amount into the reaction kettle, mixing and stirring for 3 hours, performing suction filtration after full reaction, and putting the mixture into a hot rolling furnace to be rolled for 16 hours at 230 ℃ to obtain viscous liquid;

and drying, washing, filtering, drying again, crushing and sieving the viscous liquid in sequence to obtain the filtrate reducer for the oil-based drilling fluid.

EXAMPLE III

The fluid loss additive for the oil-based drilling fluid comprises, by weight, 100-145 parts of tall oil fatty acid, 130-200 parts of polyethylene polyamine, 350-400 parts of humic acid, 5-10 parts of a catalyst and 800-1600 parts of water.

The method comprises the following steps:

the raw material comprises, by weight, 100-145 parts of tall oil fatty acid, 130-200 parts of polyethylene polyamine, 350-400 parts of humic acid, 5-10 parts of a catalyst and 700-1300 parts of water.

Adding a required amount of tall oil amide mixed solution and a required amount of water into a reaction kettle, setting the temperature to be 60 ℃, mixing and stirring until the mixture is completely dissolved, adding a required amount of humic acid into the reaction kettle, mixing and stirring for 3 hours, performing suction filtration after full reaction, and placing the mixture into a hot rolling furnace to be hot-rolled for 16 hours at 230 ℃ to obtain viscous liquid;

and drying, washing, filtering, drying again, crushing and sieving the viscous liquid in sequence to obtain the filtrate reducer for the oil-based drilling fluid.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.