CN103289667A - Flow improver for shale gas reservoir fracturing and preparation method thereof - Google Patents
Flow improver for shale gas reservoir fracturing and preparation method thereof Download PDFInfo
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- CN103289667A CN103289667A CN2013101732623A CN201310173262A CN103289667A CN 103289667 A CN103289667 A CN 103289667A CN 2013101732623 A CN2013101732623 A CN 2013101732623A CN 201310173262 A CN201310173262 A CN 201310173262A CN 103289667 A CN103289667 A CN 103289667A
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- acrylamide
- ammonium chloride
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- octadecyl ammonium
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Abstract
The invention relates to a flow improver for shale gas reservoir fracturing and a preparation method thereof in the development of shale gas reservoir. The invention provides a flow improver with high resistance reducing efficiency, strong high-temperature resistance and salt tolerance and small dosage. The technical scheme is as follows: the flow improver is a copolymer prepared by polymerizing acrylamide with dimethyl allyl octadecyl ammonium chloride and including with hydroxypropyl cyclodextrin, and the ingredients and contents of raw materials used for preparing the flow improver are as follows: 6.95g of acrylamide, 0.56g of dimethyl allyl octadecyl ammonium chloride, 36g of hydroxypropyl cyclodextrin, 1g of ethanol, 5ml of ammonium persulfate solution and 10g of water. The preparation method comprises: firstly mixing an acrylamide aqueous solution with a dimethyl allyl octadecyl ammonium chloride solution, adding an initiator, filling nitrogen to remove the oxygen, reacting at 45 DEG C for 18hours to obtain a binary polymer, adding the hydroxypropyl cyclodextrin, and stirring the mixture at 60 DEG C for 18hours to obtain the flow improver. The flow improver has the stick-slip property of a polymer and the assembly and disassembly property of a cationic surface active agent.
Description
Technical field
The present invention relates to a kind ofly for shale gas reservoir development field, can strengthen shale gas reservoir pressure break and flow shale gas reservoir pressure break that catalysis falls resistance and increase recovery ratio with FLOW IMPROVERS and preparation method.
Background technology
Shale gas is the unconventional Sweet natural gas that exploitation is come out from the shale bed.The main basin of China and regional shale gas stock number are about 15,000,000,000,000～30 tcms, and be roughly suitable with the U.S. 28.3 tcms, and economic worth is huge.At present, the external interdependency of crude oil in China rises just year by year, and the external interdependency of U.S crude is descending year by year, this wherein substitute energy such as shale gas brought into play vital role.Coming few decades will be the peak period of Chinese Sweet natural gas industry development, and the output of conventional gas can not satisfy domestic needs.Therefore the exploratory development with shale gas of rich resource base demands realizing great-leap-forward development urgently.
Because shale porosity and rate of permeation are lower, gas-flow resistance is bigger than conventional gas, the productivity of shale gas and recovery ratio are also lower, be generally less than 60%, therefore the ultimate recovery factor of shale gas depends on effective pressure break measure, and pressure break friction reducer commonly used exists cost too high or to unfavorable factors such as formation damage are bigger at present.The present invention has the resistance-reducing efficiency height, and temperature resistance, saline-alkaline tolerance are strong, but characteristics such as natural degradation; Be conducive to environmental protection simultaneously, be conducive to improve gas deposit recovery efficiency; Its preparation method is simple and feasible, the reaction conditions gentleness; Can be widely used in the development field of unconventional energy resource.
Summary of the invention
The objective of the invention is: for a kind of resistance-reducing efficiency height is provided, the heat and salinity tolerance ability is strong, and the FLOW IMPROVERS that consumption is few special proposes a kind of shale gas reservoir pressure break with FLOW IMPROVERS and preparation method.
In order to achieve the above object, the present invention is by the following technical solutions: shale gas reservoir pressure break FLOW IMPROVERS, it is characterized in that this FLOW IMPROVERS gets super molecular compound after getting binary polymer by acrylamide and the polymerization of dimethyl-allyl octadecyl ammonium chloride again with the hydroxypropyl cyclodextrin inclusion.Its structural formula is as follows:
Wherein, the molar percentage of x is that the molar percentage of 95-98.5%, y is 1.5-5%,
Be the cyclodextrin structure unit.
Shale gas reservoir pressure break may further comprise the steps with the preparation method of FLOW IMPROVERS:
Get the 6.95g acrylamide and be dissolved in the 10g water and be mixed with acrylamide soln, getting 0.56g dimethyl-allyl octadecyl ammonium chloride, to be dissolved in the 1g mass percentage concentration be to be mixed with dimethyl-allyl octadecyl ammonium chloride solution in 50% aqueous ethanolic solution.Above-mentioned two kinds of solution are moved on in the three-necked flask, adding volumetric concentration is the ammonium persulfate solution initiator 5mL of 40mg/L, the inflated with nitrogen displacement is after 30 minutes, put into temperature and be 45 ℃ magnetic agitation water-bath reaction 18 hours, get acrylamide and dimethyl-allyl octadecyl ammonium chloride binary polymer.In above-mentioned binary polymer solution, add the 36g mass percentage concentration again and be 50% the hydroxypropyl cyclodextrin aqueous solution temperature be 60 ℃ continue to stir 18 hours the super molecular compound shale gas reservoir pressure break FLOW IMPROVERS of hydroxypropyl cyclodextrin inclusion of acrylamide and dimethyl-allyl octadecyl ammonium chloride binary polymer.
The present invention compared with prior art, its beneficial effect is: the super molecular compound shale gas reservoir pressure break of the hydroxypropyl cyclodextrin inclusion of (1) acrylamide and dimethyl-allyl octadecyl ammonium chloride binary polymer has glutinous sliding property and the cation surface activating of acrylamide polymer with FLOW IMPROVERS; (2) combination of hydroxypropyl cyclodextrin and acrylamide and dimethyl-allyl octadecyl ammonium chloride binary polymer has disassembly, hydroxypropyl cyclodextrin is what to separate with acrylamide and dimethyl-allyl octadecyl ammonium chloride binary polymer when running into shearing or tiny pore throat, polymericular weight diminishes, when lose shear or the duct when becoming big again inclusion return to the original molecule amount.
Description of drawings
Accompanying drawing is the infrared analysis spectrogram of this FLOW IMPROVERS multipolymer.
Embodiment
The present invention is further described below by embodiment.
Embodiment 1
Get the 6.95g acrylamide and be dissolved in the 10g water and be mixed with acrylamide soln, getting 0.56g dimethyl-allyl octadecyl ammonium chloride, to be dissolved in the 1g mass percentage concentration be to be mixed with dimethyl-allyl octadecyl ammonium chloride solution in 50% aqueous ethanolic solution.Above-mentioned two kinds of solution are moved on in the three-necked flask, adding volumetric concentration is the ammonium persulfate solution initiator 5mL of 40mg/L, the inflated with nitrogen displacement is after 30 minutes, put into temperature and be 45 ℃ magnetic agitation water-bath reaction 18 hours, get acrylamide and dimethyl-allyl octadecyl ammonium chloride binary polymer.In above-mentioned binary polymer solution, add the 36g mass percentage concentration again and be 50% the hydroxypropyl cyclodextrin aqueous solution temperature be 60 ℃ continue to stir 18 hours the super molecular compound shale gas reservoir pressure break FLOW IMPROVERS of hydroxypropyl cyclodextrin inclusion of acrylamide and dimethyl-allyl octadecyl ammonium chloride binary polymer.This shale gas reservoir pressure break belongs to as table 1 with the infrared absorption peak of flow ability modifying agent.
Table 1 infrared analysis (v stretching vibration, δ flexural vibration)
(KBr, compressing tablet, cm
-1, V=stretching vibration, δ=flexural vibration)
Shale gas reservoir pressure break records performance such as table 2 for 80 times with the FLOW IMPROVERS thin up.
The table 2 shale gas reservoir pressure break performance evaluation result of FLOW IMPROVERS
Claims (2)
1. shale gas reservoir pressure break FLOW IMPROVERS, it is characterized in that: this FLOW IMPROVERS is by acrylamide and the polymerization of dimethyl-allyl octadecyl ammonium chloride, again with the hydroxypropyl cyclodextrin inclusion multipolymer, its name is called acrylamide/dimethyl-allyl octadecyl ammonium chloride/hydroxypropyl cyclodextrin multipolymer, and its structural formula is:
Wherein, the molar percentage of x is that the molar percentage of 95-98.5%, y is 1.5-5%,
Be the cyclodextrin structure unit.
One kind according to claim 1 shale gas reservoir pressure break with the preparation method of FLOW IMPROVERS, it is characterized in that: get the 6.95g acrylamide and be dissolved in the 10g water and be mixed with acrylamide soln, getting 0.56g dimethyl-allyl octadecyl ammonium chloride, to be dissolved in the 1g mass percentage concentration be to be mixed with dimethyl-allyl octadecyl ammonium chloride solution in 50% aqueous ethanolic solution; Above-mentioned two kinds of solution are moved on in the three-necked flask, adding volumetric concentration is the ammonium persulfate solution initiator 5mL of 40mg/L, the inflated with nitrogen displacement is after 30 minutes, put into temperature and be 45 ℃ magnetic agitation water-bath reaction 18 hours, get acrylamide and dimethyl-allyl octadecyl ammonium chloride binary polymer; In above-mentioned binary polymer solution, add the 36g mass percentage concentration again and be 50% the hydroxypropyl cyclodextrin aqueous solution temperature be 60 ℃ continue to stir 18 hours the super molecular compound shale gas reservoir pressure break FLOW IMPROVERS of hydroxypropyl cyclodextrin inclusion of acrylamide and dimethyl-allyl octadecyl ammonium chloride binary polymer.
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| CN103289667B CN103289667B (en) | 2015-04-22 |
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Cited By (7)
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| CN103710016A (en) * | 2013-12-25 | 2014-04-09 | 四川贝恩能化工有限公司 | Dry-powder structural fluid drag reducer and preparation method thereof |
| CN105273128A (en) * | 2015-10-22 | 2016-01-27 | 东北电力大学 | Preparation method of AM/AMPS/BA (acrylamide/2-acrylamido-2-methylpropane sulfonic acid/butyl acetate) copolymer and MAH-beta-CD (maleic anhydride-beta-cyclodextrin) composition |
| CN106543355A (en) * | 2016-07-13 | 2017-03-29 | 成都菲尔特技术开发有限公司 | A kind of hydrophobic associated polymer and preparation method thereof |
| CN105254813B (en) * | 2015-11-12 | 2018-08-24 | 吉林化工学院 | A kind of preparation method of the hydrophobic response type polymer of low-permeability oil deposit pressure break |
| CN111394086A (en) * | 2020-04-27 | 2020-07-10 | 山东滨州昱诚化工科技有限公司 | Preparation method of environment-friendly water-saving fracturing fluid |
| CN114426813A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | High-temperature-resistant gel particle while-drilling plugging agent and preparation method and application thereof |
| CN116656335A (en) * | 2023-04-28 | 2023-08-29 | 京准化工技术(上海)有限公司 | Drag reducer for fracturing fluid and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103710016A (en) * | 2013-12-25 | 2014-04-09 | 四川贝恩能化工有限公司 | Dry-powder structural fluid drag reducer and preparation method thereof |
| CN105273128A (en) * | 2015-10-22 | 2016-01-27 | 东北电力大学 | Preparation method of AM/AMPS/BA (acrylamide/2-acrylamido-2-methylpropane sulfonic acid/butyl acetate) copolymer and MAH-beta-CD (maleic anhydride-beta-cyclodextrin) composition |
| CN105254813B (en) * | 2015-11-12 | 2018-08-24 | 吉林化工学院 | A kind of preparation method of the hydrophobic response type polymer of low-permeability oil deposit pressure break |
| CN106543355A (en) * | 2016-07-13 | 2017-03-29 | 成都菲尔特技术开发有限公司 | A kind of hydrophobic associated polymer and preparation method thereof |
| CN106543355B (en) * | 2016-07-13 | 2020-07-10 | 成都菲尔特技术开发有限公司 | Hydrophobic association polymer and preparation method thereof |
| CN111394086A (en) * | 2020-04-27 | 2020-07-10 | 山东滨州昱诚化工科技有限公司 | Preparation method of environment-friendly water-saving fracturing fluid |
| CN114426813A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | High-temperature-resistant gel particle while-drilling plugging agent and preparation method and application thereof |
| CN114426813B (en) * | 2020-10-29 | 2023-06-23 | 中国石油化工股份有限公司 | High-temperature-resistant gel particle plugging agent while drilling as well as preparation method and application thereof |
| CN116656335A (en) * | 2023-04-28 | 2023-08-29 | 京准化工技术(上海)有限公司 | Drag reducer for fracturing fluid and preparation process thereof |
| CN116656335B (en) * | 2023-04-28 | 2024-02-09 | 京准化工技术(上海)有限公司 | Drag reducer for fracturing fluid and preparation process thereof |
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