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Gel packing material and preparation method thereof

A technology of jelly and raw materials, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor gel breaking performance and poor temperature resistance, so as to increase the strength of jelly, improve stability and toughness, and form The effect of shortening the glue time

Inactive Publication Date: 2018-11-13
FOSHAN CHAOHONG NEW MATERIAL TECH CO LTD
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  • Description
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Problems solved by technology

[0008] The technical problem to be solved by the present invention: Aiming at the problems of poor temperature resistance and poor gel breaking performance of current jelly materials, a jelly sealing material and its preparation method are provided

Method used

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  • Gel packing material and preparation method thereof

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Embodiment Construction

[0023] Take 500-600g of rice husk ash, add 1.5-3.0L of 20% sodium hydroxide solution, stir at 300-400r / min for 2-3 hours in a constant temperature water bath at 90-100°C, then filter, collect the filtrate, and The filtrate is evaporated and concentrated on a rotary evaporator until the solid content is 40-50%, to obtain a weighting agent, take 40-80g acrylamide, 20-40g sodium methacrylate, 15-30g 2-acrylamido-2-methylpropane Add sulfonic acid to 300-500mL deionized water, stir at 300-400r / min at 18-20°C for 20-30min, and adjust the pH to 7.0-7.5 with sodium carbonate solution to obtain a reaction solution. Take 50-100g of alkali lignin, Add 300-500mL of deionized water, stir at 300-400r / min for 10-20min, then add 2-10g of cross-linking agent, mix well and add the reaction solution, under nitrogen atmosphere, stir and heat at 200-300r / min to 60 ~80°C, heat preservation reaction for 1~2h, then add 5~10g toughening agent, 0.2~0.5g composite initiator, 1.2~2.4g inhibitor, 120~240g...

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Abstract

The invention relates to a gel packing material and a preparation method thereof, and belongs to the technical field of gel materials. By use of the natures that alkali lignin cannot be dissolved in acid and separates out sediments easily, the alkali lignin is modified and is then grafted with acrylamide, sodium methacrylate and 2-acryloylamino-2-methallyl sulfonate to improve the water solubilityand the reaction activity of a copolymerization product; meanwhile, under the action of a crosslinking agent, crosslinking reaction occurs, so that the density of crosslinking points is increased, athree-dimensional network structure is formed, the intensity of gel is increased, and the gelling time is shortened; a flexibilizer is a macromolecular polymer for adhering and twisting a mesh structure of an alkali lignin gel system, reinforcing an alkali lignin spatial mesh structure and improving the stability and the flexibility of the whole structure, so as to achieve toughening and anti-shearing effects; an alkaline alkali lignin solution is injected into a mine and is in contact with acidic fluid in the mine or injected in the later stage, so that alkali lignin is separated out continuously to form the sediments and complete blocking.

Description

technical field [0001] The invention relates to a jelly sealing material and a preparation method thereof, belonging to the technical field of jelly materials. Background technique [0002] With the development of oil and gas field development technology, oil and gas fields at home and abroad pay more and more attention to the protection of oil and gas reservoirs. Therefore, in the process of oil and gas field development, snubbing technology is widely used. At present, the snubbing operation at home and abroad is mainly realized by installing a snubbing operation device at the well mouth, but this mechanical device is expensive, the operation is complicated, and the safety performance of the mechanical device itself cannot be guaranteed. In 2007, Turpan-Hami Oilfield proposed the jelly valve technology for the first time, and successfully applied it to underbalanced well completion operations, realizing the whole process of nitrogen underbalanced well completion. The jelly...

Claims

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Application Information

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IPC IPC(8): C09K8/50C09K8/516C09K8/512C09K8/508
CPCC09K8/501C09K8/5083C09K8/512C09K8/516
Inventor 刘菊花张桂芳史志新
Owner FOSHAN CHAOHONG NEW MATERIAL TECH CO LTD
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