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Acidizing corrosion inhibitor applicable to high temperature of 160-180 DEG C as well as preparation method and application of acidizing corrosion inhibitor
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A technology of acidizing corrosion inhibitor and high temperature, which is applied in chemical instruments and methods, earthwork drilling, mining fluids, etc. Excellent, simple formula, reducing pitting effect
Active Publication Date: 2018-08-03
XI'AN PETROLEUM UNIVERSITY
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Among them, there are few varieties of corrosion inhibitors that can meet the high temperature and high concentrationhydrochloric acid acidification, and there are disadvantages such as easy coking, delamination, and unstable dissolution and dispersion performance at high temperatures, which may cause formation damage
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Embodiment 1
[0025] A kind of corrosion inhibitor suitable for 160℃ high temperature acidification, its composition is calculated by weight percentage:
[0031] A preparation method suitable for 160℃ high temperature acidification corrosion inhibitor, the steps are as follows:
[0032] (1) Preparation of 8-hydroxyquinoline quaternary ammonium salt
[0033] First, the following raw materials are selected in terms of weight percentage: 8-hydroxyquinoline: 28%, benzyl chloride: 22%, and N,N-dimethylformamide: 50%. Add N,N-dimethylformamide and 8-hydroxyquinoline to the reaction kettle in proportions, turn on the stirrer, slowly heat up to 130℃~140℃, stir until the 8-hydroxyquinoline is completely dissolved, add chlorine in proportion Benzyl benzyl, react for 5h-6h, stop heating, continue stirring until the t...
Embodiment 2
[0044] A kind of corrosion inhibitor suitable for high temperature acidification at 180℃, its composition is calculated by weight percentage:
[0050] A preparation method suitable for 180℃ high temperature acidification corrosion inhibitor, the steps are as follows:
[0051] (1) Preparation of 8-hydroxyquinoline quaternary ammonium salt
[0052] First, the following raw materials are selected in terms of weight percentage: 8-hydroxyquinoline: 28%, benzyl chloride: 22%, and N,N-dimethylformamide: 50%. Add N,N-dimethylformamide and 8-hydroxyquinoline to the reaction kettle in proportions, turn on the stirrer, slowly heat up to 130℃~140℃, stir until the 8-hydroxyquinoline is completely dissolved, add chlorine in proportion Benzyl benzyl, react for 5h-6h, stop heating, continue stirring until th...
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Abstract
The invention discloses an acidizing corrosion inhibitor applicable to the high temperature of 160-180 DEG C as well as a preparation method and an application of the acidizing corrosion inhibitor. The acidizing corrosion inhibitor is prepared from a 8-hydroxyquinoline quaternaryammonium salt corrosion inhibition host, a peregal O-25 dispersant, corrosion inhibition synergists methylphentynol and2-benzoyl-3-hydroxyl-1-propylene and a N,N-dimethylformamidesolvent. The acidizing corrosion inhibitor is applicable to yield increase operation construction of deep wells at 160-180 DEG C and 15%-28% concentrated hydrochloric acid or mud acid acidized oil and gas wells, has the advantages that raw materials are easy to obtain, the preparation condition is mild, the formula is simple and the dissolutiondispersity at the high temperature is good and has the corrosion inhibition performance at 160-180 DEG C superior to the first-class product standard.
Description
Technical field [0001] The invention relates to the technical field of oilfield development, and in particular to a high-temperature acidification corrosion inhibitor suitable for 160°C to 180°C, and a preparation method and application thereof. Background technique [0002] With the increasing demand for oil and gas resources in the world economy and the continuous advancement of drilling and production technology, a large number of deep wells, ultra-deep wells (>7000m) and very deep wells (>15000m) have been put into development, and the bottom hole temperature will rise accordingly, and The number of high-dose and high-concentration acidizing wells is increasing year by year, which puts forward higher performance requirements for the corrosion inhibitors used in the acidizing process of oil and gas wells. At present, the acidification corrosion inhibitors on the market are mainly organic, including chain organic amines and their derivatives, rosin derivatives, quaternary...
Claims
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