CN1130439C - Profile control agent for delaying crosslinking depth - Google Patents
Profile control agent for delaying crosslinking depth Download PDFInfo
- Publication number
- CN1130439C CN1130439C CN 00103532 CN00103532A CN1130439C CN 1130439 C CN1130439 C CN 1130439C CN 00103532 CN00103532 CN 00103532 CN 00103532 A CN00103532 A CN 00103532A CN 1130439 C CN1130439 C CN 1130439C
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- CN
- China
- Prior art keywords
- percent
- control agent
- profile control
- polyacrylamide
- hydrolysis degree
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004132 cross linking Methods 0.000 title claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000007864 aqueous solution Substances 0.000 claims abstract description 9
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 8
- 230000003111 delayed effect Effects 0.000 claims abstract description 7
- 230000007062 hydrolysis Effects 0.000 claims abstract description 7
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 36
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 13
- 235000006408 oxalic acid Nutrition 0.000 claims description 12
- 229920006318 anionic polymer Polymers 0.000 claims description 2
- 238000009472 formulation Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 125000000129 anionic group Chemical group 0.000 abstract 1
- 239000003153 chemical reaction reagent Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 9
- 239000010410 layer Substances 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001879 gelation Methods 0.000 description 3
- -1 compound ion Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the field of oilfield chemical application, in particular to a delayed crosslinking depth profile control agent for a water injection well, which comprises the following components in percentage by weight: the anionic polyacrylamide has the molecular weight of more than 1000 ten thousand, the hydrolysis degree of 25-30 percent, the hydrolysis degree of 0.15-0.5 percent, 0.4-0.8 percent, 0.1-0.3 percent, 0.1-0.2 percent and 98.2-99.25 percent, and is prepared into 0.7-2.5 percent aqueous solution according to the weight ratio. The invention applies the polyacrylamide with high molecular weight and high hydrolysis degree, not only can reduce the use concentration of the formula, but also has higher gelling time and viscosity, and has the advantages of low cost, simple and convenient preparation, low initial viscosity, long gelling time (2-3 months), high gelling strength and the like.
Description
The present invention relates to the oilfield chemistry Application Areas, is a kind of water injection well Propile control agent with delayed cross-linking depth.
The heterogeneous body multiple zone sandstone oil field of early-stage waterflooding is along with Oilfield developing, because this nonuniformity on stratum exists vertically and planar hyposmosis and high permeability zones.Adopt under the situation of closing notes closing on the stratum of different rate of permeation, injects water and preferentially select the low resistance zone flows, so just formed inject ripples and less than the zone, even formation region of bypassed oil.Moreover because the nonuniformity of oil reservoir is different with the profit mobile, injects water and advance along the high permeability zones territory, form individual layer in the vertical and advance by leaps and bounds, form tonguing in the horizontal, make the well water lift velocity too fast, pool swept volume coefficient is low, has the reserves of considerable low permeability pay to employ relatively poor.In order to reduce the water production rate of oil well, adjust contradiction in interlayer, the layer.In giving full play to, the effect of low permeability layer, must to alleviate oil field comprehensive water cut lift velocity effectively, improve and inject ripples and volume and oil displacement efficiency, to reach the purpose of steady oil control water with the amendment of higher-strength with the most permeable zone shutoff.
The depth profile control agent of using mainly contains compound ion depth profile control agent, flow-gel etc. at present.The compound ion depth profile control agent is made up of zwitterion polymkeric substance, phenol, oxalic acid, Resorcinol, amendment cost height, configuration complexity; Flow-gel is made up of polymeric anion type polyacrylamide, Tiorco 677, thiocarbamide, and cost is low, but owing to be weak gel, thereby need large usage quantity, long construction period.
The objective of the invention is to avoid the weak point of above-mentioned prior art, and a kind of cost that provides is low, prepare easy, initial viscosity is low, gelation time long (2-3 month), gelling strength height, can reduce the rate of permeation of most permeable zone significantly, adjust interlayer and horizontal contradiction, fully in the performance, the potentiality of low permeability layer, improve the Propile control agent with delayed cross-linking depth of water injection well development effectiveness.
Purpose of the present invention can reach by the following technical programs:
Propile control agent with delayed cross-linking depth is made up of anionic polymer, black unconventional and uninhibited product, phenol, oxalic acid, its prescription by its weight ratio is: anion-polyacrylamide, molecular weight＞1,000 ten thousand, degree of hydrolysis 25～30%: black unconventional and uninhibited product: phenol: oxalic acid=0.15～0.5%: 0.4～0.8%: 0.1～0.3%: 0.1～0.2%, be made into 0.7～2.5% the aqueous solution again by above-mentioned weight ratio.
In order to further specify the present invention, below enumerate specific embodiment:
Embodiment 1: adopt anion-polyacrylamide, and its molecular weight＞1,000 ten thousand, degree of hydrolysis 25～30%, black unconventional and uninhibited product, phenol, oxalic acid are mixed with the aqueous solution.Its polymkeric substance: black unconventional and uninhibited product: phenol: oxalic acid=0.15: 0.4: 0.1: 0.1, obtain containing the mentioned reagent weight percent and be 0.75% the amendment aqueous solution.
Embodiment 2: adopt the reagent identical with embodiment 1, be mixed with polymkeric substance: black unconventional and uninhibited product: phenol: oxalic acid=0.15: 0.4: 0.3: 0.2, obtain containing the mentioned reagent weight percent and be 1.05% the amendment aqueous solution.
Embodiment 3: adopt the reagent identical with embodiment 1, be mixed with polymkeric substance: black unconventional and uninhibited product: phenol: oxalic acid=0.5: 0.4: 0.1: 0.1, obtain containing the mentioned reagent weight percent and be 1.1% the amendment aqueous solution.
Embodiment 4: adopt the reagent identical with embodiment 1, be mixed with polymkeric substance: black unconventional and uninhibited product: phenol: oxalic acid=0.5: 0.8: 0.3: 0.2, obtain containing the mentioned reagent weight percent and be 1.8% the amendment aqueous solution.
Embodiment 5: adopt the reagent identical with embodiment 1, be mixed with polymkeric substance: black unconventional and uninhibited product: phenol: oxalic acid=0.25: 0.4: 1: 0.2, obtain containing the mentioned reagent weight percent and be 0.95% the amendment aqueous solution.Above Example formulations is listed as follows:
| Embodiment | Polymkeric substance (mg/L) | Crow unconventional and uninhibited product (mg/L) | Phenol (mg/L) | Oxalic acid (mg/L) |
| 1 | 1500 | 4000 | 1000 | 1000 |
| 2 | 1500 | 4000 | 3000 | 2000 |
| 3 | 5000 | 4000 | 1000 | 1000 |
| 4 | 5000 | 8000 | 3000 | 2000 |
| 5 | 2500 | 4000 | 1000 | 2000 |
Only needing to add the amendment container for storing liquid on the on-the-spot injection device on original annotation pumping unit basis gets final product.Amendment injects preset layer position, and the reaction back forms high-intensity gel, reduces the rate of permeation of most permeable zone.Its delayed response mechanism is, because linking agent is an organism, do not discharge effective ingredient at normal temperatures, be in metastable state, when discharging lentamente with polyacrylamide, system effective ingredient under temperature action reacts, but because effective ingredient progressively discharges, limited amount, the concentration in the system is lower, tangible crosslinking reaction can not occur, thereby system viscosity increasess slowly, when the effective ingredient in the system reaches finite concentration, condensation, crosslinking reaction becomes obviously, and system viscosity also significantly increases, the gelinite that generates is the shutoff most permeable zone effectively, plays the effect of profile control.
The fill a prescription polyacrylamide of interior application HMW, high degree of hydrolysis of the present invention, it is all higher not only can to reduce the working concentration of prescription but also gelation time and viscosity, and it is low to have a cost, prepare easy, initial sticking low, gelation time long (2-3 month), gelling strength advantages of higher.
Claims (1)
1. Propile control agent with delayed cross-linking depth, form by anionic polymer, black unconventional and uninhibited product, phenol, oxalic acid, it is characterized in that prescription by its weight ratio is: anion-polyacrylamide, molecular weight＞1,000 ten thousand, degree of hydrolysis 25～30%: black unconventional and uninhibited product: phenol: oxalic acid=0.15～0.5%: 0.4～0.8%: 0.1～0.3%: 0.1～0.2%; Again by above-mentioned formulation weight than the aqueous solution that is made into 0.7～2.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00103532 CN1130439C (en) | 2000-03-24 | 2000-03-24 | Profile control agent for delaying crosslinking depth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00103532 CN1130439C (en) | 2000-03-24 | 2000-03-24 | Profile control agent for delaying crosslinking depth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1278546A CN1278546A (en) | 2001-01-03 |
| CN1130439C true CN1130439C (en) | 2003-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00103532 Expired - Fee Related CN1130439C (en) | 2000-03-24 | 2000-03-24 | Profile control agent for delaying crosslinking depth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1130439C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1315978C (en) * | 2005-01-26 | 2007-05-16 | 大庆油田有限责任公司 | Deep plugging agent containing wood dust and gel |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787268B (en) * | 2009-12-31 | 2012-07-25 | 新疆新易通石油科技有限公司 | Gel profile control agent for delaying generation of precipitation granules and preparation method thereof |
| CN102816558B (en) * | 2012-09-14 | 2015-03-18 | 中国石油大学(华东) | Plugging agent for deep profile control and water plugging and preparation method thereof |
| CN107794025A (en) * | 2016-09-06 | 2018-03-13 | 中国石油化工股份有限公司 | Multiple crosslinking agent and its preparation method and application |
| CN110144200B (en) * | 2019-06-14 | 2020-07-03 | 黑龙江益瑞化工有限公司 | Copolymer elastic gel profile control agent for oilfield chemical oil extraction |
| CN110205107B (en) * | 2019-06-21 | 2020-06-30 | 黑龙江益瑞化工有限公司 | Composite ionic water shutoff profile control agent for oilfield chemical oil extraction and preparation method thereof |
| CN114426826B (en) * | 2020-10-29 | 2023-05-26 | 中国石油天然气股份有限公司 | Plugging slug composition, oil displacement slug composition, profile control and profile control agent and application |
| CN116622352A (en) * | 2022-02-10 | 2023-08-22 | 中国石油天然气集团有限公司 | Iron-resistant crosslinked polymer gel plugging agent system and preparation method thereof |
-
2000
- 2000-03-24 CN CN 00103532 patent/CN1130439C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1315978C (en) * | 2005-01-26 | 2007-05-16 | 大庆油田有限责任公司 | Deep plugging agent containing wood dust and gel |
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| Publication number | Publication date |
|---|---|
| CN1278546A (en) | 2001-01-03 |
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Granted publication date: 20031210 Termination date: 20140324 |