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A kind of oil-soluble resin for petroleum exploitation and its preparation method and application
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An oil-soluble resin and oil mining technology, which is applied in the fields of mining fluids, chemical instruments and methods, earthwork drilling, etc., can solve the problems of production well production decline, etc., and achieve the effect of no residue and complete dissolution
Active Publication Date: 2019-08-13
青岛科凯达橡塑有限公司
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Problems solved by technology
[0002] During the stimulation process of oilfield bottom water reservoirs and the middle and late stages of water injection development, due to the heterogeneity of geological formations, a pressure drop funnel is formed near the wellbore, so that some layers are prematurely flooded near the wellbore, resulting in the production of production wells decline
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Embodiment 1
[0020] ①Add 35kg of deionized water into a 50L reactor, heat up to 60°C, add 100g of dispersant, and stir;
[0021] ② Then add 2250g of styrene, 500g of methyl methacrylate, 2250g of dicyclopentadiene, 10g of 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane, 2, 15g of 2-bis(tert-butylperoxy)octane, continue to stir and seal, vacuumize to -0.08~-0.09MPa, add nitrogen to increase the pressure to 0.8MPa, and raise the temperature to 95°C;
[0022] ③Stir continuously at 95°C, control the reaction temperature difference ±0.5°C, stir at a speed of 120rpm, fully react for 15 hours, cool down, release pressure, filter, and dry to obtain powdered oil-soluble resin for petroleum development.
Embodiment 2
[0024] ①Add 35kg of deionized water into a 50L reactor, heat up to 60°C, add 125g of dispersant, and stir;
[0025] ② Then add styrene 2750g, methyl methacrylate 500g, dicyclopentadiene 1750g, 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane 10g, 2,2 - 10g of bis(tert-butyl peroxide)butane, continue to stir and seal, vacuumize to -0.08~-0.09MPa, add nitrogen to increase the pressure to 0.8MPa, and raise the temperature to 100°C;
[0026] ③Keep stirring continuously at 95°C, control the reaction temperature difference ±0.5°C, stir at 120rpm, fully react for 14 hours, cool down, release pressure, filter, and dry to obtain powdered oil-soluble resin for petroleum development.
Embodiment 3
[0028] ① Add 35kg of deionized water into a 50L reactor, heat up to 60°C, add 150g of dispersant, and stir;
[0029] ② Then add styrene 2500g, methyl methacrylate 600g, dicyclopentadiene 1900g, 1,1-bis(tert-butyl peroxy)cyclohexane 11g, 2,2-bis(tert-butyl peroxide base) octane 12g, continue to stir and seal, vacuumize to -0.08~-0.09MPa, add nitrogen to increase the pressure to 0.9MPa, and raise the temperature to 105°C;
[0030] ③Keep stirring continuously at 105°C, control the reaction temperature difference ±0.5°C, stir at 120rpm, fully react for 14 hours, cool down, release pressure, filter, and dry to obtain powdered oil-soluble resin for petroleum development.
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Abstract
The invention relates to the field of fracturing yield-increase measures and oil extraction technology in the oilfield exploitation process, especially to oil-soluble resin for oil exploitation and a preparation method and application thereof. Raw materials for the preparation comprise, by weight, 45-50 parts of styrene, 10-12 parts of methyl methacrylate, 35-45 parts of dicyclopentadiene, 1-3 parts of a dispersant and 0.4-0.5 part of an initiator. The preparation method comprises the following steps: heating deionized water to 60 DEG C, adding the dispersant while stirring, adding styrene, methyl methacrylate, dicyclopentadiene and the initiator, continuously stirring and sealing and vacuumizing to -0.08 to -0.09 MPa, adding nitrogen and lifting pressure to 0.8-0.9 MPa, heating to 95-105 DEG C, controlling reaction temperature difference to + / -0.5 DEG C and reacting for 14-15 h, cooling, releasing pressure, filtering, and drying to obtain powdery oil-soluble resin for oil exploitation. The oil-soluble resin for oil exploitation can bear 15 MPa of pressure within the range of 60-120 DEG C within 4 h, and then is gradually softened and dissolved thoroughly without residues.
Description
technical field [0001] The invention relates to the field of fracturing production stimulation measures in the process of oilfield exploitation and oil recovery technology, in particular to an oil-soluble resin for oil development and its preparation method and application. Background technique [0002] During the stimulation process of oilfield bottom water reservoirs and the middle and late stages of water injection development, due to the heterogeneity of geological formations, a pressure drop funnel is formed near the wellbore, so that some layers are prematurely flooded near the wellbore, resulting in the production of production wells decline. The invention develops a water-insoluble and oil-soluble resin that can bear pressure within a certain range, so that it can be injected into the interface of the oil-water layer under certain operating conditions, and form a non-water-soluble resin at the interface of the oil-water layer with a certain seal. The barrier wall is...
Claims
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Application Information
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