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

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...

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 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