Method for preparing high-temperature resistant and salt resistant tackifier for drilling fluid

A high temperature resistance and drilling fluid technology, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of drilling construction accidents, high temperature and salt content, cuttings cannot be effectively removed, etc., to achieve viscosity reduction problems, good salt resistance, and good technical and economic benefits

Active Publication Date: 2011-01-26
北京奥凯立科技发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, for buried-hill reservoirs buried deep and formations with salt-gypsum reservoirs, the temperature is relatively high and the salt content is relatively high during drilli

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of the anti-high temperature and anti-salt viscosifier for drilling fluid in this embodiment comprises the following steps: (1) Raw material preparation, calculated by the addition amount per 100 milliliters of water: 2-acrylamido-2-methylpropanesulfonic acid 56 grams, 20 grams of acrylamide, 15 grams of acrylic acid, 0.1 gram of potassium persulfate; (2) configuration mother liquor: according to the ratio of raw materials in the step (1), 2-acrylamido-2-methylpropanesulfonic acid, propylene Amide and acrylic acid are added into water simultaneously to form a primary mother liquor, and the pH of the primary mother liquor is adjusted to 6 with a mass percent concentration of 20% sodium hydroxide solution to form a mother liquor; (3) Polymerization: the obtained in step (2) The temperature of the mother liquor is raised to 60°C, and then potassium persulfate is added according to the ratio of raw materials in step (1), and reacted for 2 hours; (4) dr...

Embodiment 2

[0021] The preparation method of the anti-high temperature and anti-salt viscosifier for drilling fluid in this embodiment comprises the following steps: (1) Raw material preparation, calculated by the addition amount per 100 milliliters of water: 2-acrylamido-2-methylpropanesulfonic acid 60 grams, 30 grams of acrylamide, 25 grams of acrylic acid, 0.2 grams of potassium persulfate; (2) configuration mother liquor: according to the ratio of raw materials in the step (1), 2-acrylamido-2-methylpropanesulfonic acid, propylene Amide and acrylic acid are added into water simultaneously to form a primary mother liquor, and the pH of the primary mother liquor is adjusted to 7 with a mass percent concentration of 30% sodium hydroxide solution to form a mother liquor; (3) Polymerization: the obtained in step (2) The temperature of the mother liquor is raised to 80°C, and then potassium persulfate is added according to the ratio of raw materials in step (1), and reacted for 4 hours; (4) d...

Embodiment 3

[0024] The preparation method of the anti-high temperature and anti-salt viscosifier for drilling fluid in this embodiment comprises the following steps: (1) Raw material preparation, calculated by the addition amount per 100 milliliters of water: 2-acrylamido-2-methylpropanesulfonic acid 57 grams, 23 grams of acrylamide, 18 grams of acrylic acid, 0.13 grams of potassium persulfate; (2) configuration mother liquor: according to the ratio of raw materials in the step (1), 2-acrylamido-2-methylpropanesulfonic acid, propylene Amide and acrylic acid are added into water simultaneously to form a primary mother liquor, and the pH of the primary mother liquor is adjusted to 6 with a mass percent concentration of 25% sodium hydroxide solution to form a mother liquor; (3) Polymerization: the obtained in step (2) The temperature of the mother liquor is raised to 65°C, and then potassium persulfate is added according to the ratio of raw materials in step (1), and reacted for 2.5 hours; (4...

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Abstract

The invention relates to a method for preparing high-temperature resistant and salt resistant tackifier for drilling fluid, which comprises the following: (1) a step of preparing raw materials, in which 56 to 60 grams of 2-acrylamido-2-methyl propane sulfonic acid, 20 to 30 grams of acrylamide, 15 to 25 grams of acrylic acid and 0.1 to 0.2 grams of initiator are prepared according to the additionamount in each 100 milliliters of water; (2) a step of preparing mother solution, in which the 2-acrylamido-2-methyl propane sulfonic acid, the acrylamide and the acrylic acid are added into water toprepare initial mother solution, the pH value of the initial solution is regulated to 6 to 7 with sodium hydroxide solution at a mass percentage concentration of 20 to 30 percent to prepare the mother solution; (3) a step of polymerization, in which the mother solution obtained by the step (2) to 60 to 80 DEG C, the initiator is added, and a reaction is performed for 2 to 4 hours; and (4) a step of drying, in which the mixture formed after the reaction in the step (3) is dried at 95 to 105 DEG C and crushed, and thus the high-temperature resistant and salt resistant tackifier for drilling fluid is prepared. When added in high-temperature and high-salt drilling fluid, the high-temperature resistant and salt resistant tackifier for drilling fluid can regulate flow type, flocculate and coat drillings and inhibit shale hydrous disintegration.

Description

technical field [0001] The invention relates to a preparation method of a viscosifier for drilling fluid, in particular to a preparation method of a high-temperature and salt-resistant viscosifier for drilling fluid. Background technique [0002] In the prior art, for buried-hill oil reservoirs buried deep and formations with salt-gypsum reservoirs, the temperature is relatively high and the salt content is relatively high during drilling; The problem of viscosity reduction caused by the degradation of materials, cuttings cannot be effectively removed, and it is easy to cause drilling construction accidents in actual production. Contents of the invention [0003] For this reason, the technical problem to be solved by the present invention is to provide a method for preparing a drilling fluid viscosifier suitable for high temperature and high salinity conditions, so that the flow pattern, flocculation package can be effectively adjusted in the high temperature and high salt...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F220/58C09K8/035
Inventor 王雷董海军卢丙朵王铁林
Owner 北京奥凯立科技发展股份有限公司
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