CN1315978C - Deep plugging agent containing wood dust and gel - Google Patents
Deep plugging agent containing wood dust and gel Download PDFInfo
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- CN1315978C CN1315978C CNB2005100096715A CN200510009671A CN1315978C CN 1315978 C CN1315978 C CN 1315978C CN B2005100096715 A CNB2005100096715 A CN B2005100096715A CN 200510009671 A CN200510009671 A CN 200510009671A CN 1315978 C CN1315978 C CN 1315978C
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Abstract
The present invention discloses a deep plugging agent containing wood dust and gel, which relates to a deep plugging agent used for plugging a high permeation zone of a thick oil layer of a water injection well and lowering the circulation of non available water. The deep plugging agent comprises 0.15 to 0.5 wt% of high molecular weight anionic polyacrylamide whose molecular weight is greater than 19 millions and hydrolysis degree is from 25 to 30%, 0.1 to 0.3 wt% of phenol compounded polyamine, 0.01 to 0.02 wt% of resorcine, 0.1 to 0.2 wt% of oxalic acid, 0.5 to 2.5 wt% of wood dust and 99.14 to 96.48 wt% of water. A water solution whose content is from 0.86 to 3.52% is prepared according to the weight ratio. Polyacrylamide with high molecular weight and high hydrolysis degree and the wood dust are adopted in the deep plugging agent. Not only can the use concentration of a formula be lowered, but also glue forming time can be controlled, and glue forming adhesiveness is high. The cost of the deep plugging agent is lowered, and the preparation of the deep plugging agent is simple and convenient under the condition of the same plugging strength.
Description
Technical field:
The present invention relates to a kind of water injection well in oil fields and be used for shutoff thick oil pay high permeability zone, reduce non available water round-robin deep plugging agent containing.
Background technology:
Heterogeneous body sandstone oil field for the water drive exploitation enters the ultra-high water cut stage development phase, because nonuniformity is serious, injecting water washes away for a long time, cause reservoir pore structure and physical parameter to have greatly changed, thick oil pay between oil and water well produces high permeability zone or macropore, it is more and more serious along high permeability zone poor efficiency, invalid circulation to inject fluid, has reduced the oil displacement efficiency of injecting water, seriously influences the oil-field development benefit.Inject fluidic poor efficiency, invalid round-robin shutoff problem for the thick oil pay high permeability zone, research of all kinds deep plugging agent containing and test have been carried out in each oil field, as: compound ion depth profile control agent, zwitterion depth profile control agent, colloidal dispersed gel, Propile control agent with delayed cross-linking depth, precrosslink particle depth amendment etc.The mining site practice result shows: though these depth profile control agents have improved thick oil pay high permeability zone poor efficiency, invalid round-robin problem to a certain extent, also have some problems.As: 1. the amendment consumption is big, the cost height; 2. bearing resistance, residual resistance factor are low, and pressure gradient is low, can't guarantee the effective shutoff to high permeability zone; 3. because bearing resistance, residual resistance factor are low, follow-up injection fluid stream changed course ability can not be developed the hyposmosis position effectively.
Summary of the invention:
The purpose of this invention is to provide a kind of deep plugging agent containing wood dust and gel, it has effective shutoff that can realize the thick oil pay high permeability zone, the pressurize gradient of maximum amplitude, realize follow-up fluidic fluid diversion, to enlarge swept volume, improve efficiency of displacement, reduce the characteristics of depth profile control cost simultaneously.The present invention is by molecular weight＞1,900 ten thousand, degree of hydrolysis is 25～30% high molecular anion type polycrylamide, the compound polyamines of phenol, Resorcinol, oxalic acid, wood chip, water is formed, their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis is 25～30% high molecular anion type polycrylamide: 0.15～0.5%, the compound polyamines of phenol: 0.1～0.3%, Resorcinol: 0.01～0.02%, oxalic acid: 0.1～0.2%, wood chip: 0.5～2.5%, water: 99.14～96.48%, being made into concentration by above-mentioned weight ratio is 0.86～3.52% the aqueous solution.The particle diameter of described wood chip is 0.01～2mm.Making method of the present invention is: high molecular anion type polycrylamide, the compound polyamines of phenol, Resorcinol, oxalic acid, wood chip and water are packed in the preparing tank of plugging agent, and the preparation pump by the wood dust and gel plugging agent stirs, and stirring gets final product.Plugging agent of the present invention injects the high permeability zone of pre-shutoff, and the reaction back forms high-strength gel, reduces the rate of permeation of thick oil pay high permeability zone.Shutoff mechanism is: this plugging agent is to be solidified by wood fiber dispersion system and polymer gel to form.The hole of its fibre space of wood pellet has very big surface-area, in its a lot of tiny fiber branches of fiber surface distribution, just can combine with other discrete particles in the stratum by mutual physical action; Fibre space has very big hole simultaneously, and has water-retaining capacity, and inner the expansion can be taken place for it, produces bigger bulging force, wedging effect occurs, can improve the seepage resistance of most permeable zone significantly; The compound polyamines of phenol effective ingredient under effects such as oxalic acid, Resorcinol and temperature slowly discharges and reacts with polymkeric substance in the gelling system, generates the cancellated gelinite of high strength.Wood pellet is filled in the reticulated structure of gel simultaneously, with the gel formation one, can increase the intensity of gelling system effectively.Because effective ingredient progressively discharges, limited amount, concentration in the system is lower, tangible crosslinking reaction can not appear, thereby the growth of the viscosity of system is very slow, and when the effective ingredient in the system reached finite concentration, condensation, crosslinking reaction became obviously, the viscosity of system also significantly increases, and it has the effect of delayed cross-linking.Therefore this plugging agent shutoff most permeable zone or macropore effectively reaches and improves intake profile, improves the purpose of swept volume.The present invention adopts the polyacrylamide and the wood chip of high molecular, high degree of hydrolysis, not only can reduce the working concentration of prescription, and gelation time is controlled, become the adhesive capacity height, and under identical plugging strength condition, the cost of this plugging agent is lower, prepares simple and convenient.
Embodiment:
Embodiment one: present embodiment is by molecular weight＞1,900 ten thousand, degree of hydrolysis is 25～30% high molecular anion type polycrylamide, the compound polyamines of phenol, Resorcinol, oxalic acid, wood chip, water is formed, their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis is 25～30% high molecular anion type polycrylamide: 0.15～0.5%, the compound polyamines of phenol: 0.1～0.3%, Resorcinol: 0.01～0.02%, oxalic acid: 0.1～0.2%, wood chip: 0.5～2.5%, water: 99.14～96.48%, being made into concentration by above-mentioned weight ratio is 0.86～3.52% the aqueous solution.The particle diameter of described wood chip is 0.01～2mm.The making method of present embodiment is: high molecular anion type polycrylamide, the compound polyamines of phenol, Resorcinol, oxalic acid, wood chip and water are packed in the preparing tank of plugging agent, preparation pump by the wood dust and gel plugging agent stirs, and stirring gets final product.
Embodiment two: present embodiment is that 25～30% the compound polyamines of high molecular anion type polycrylamide, phenol, Resorcinol, oxalic acid, wood chip and water are formed by molecular weight＞1,900 ten thousand, degree of hydrolysis, their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: the compound polyamines of phenol 0.15%: Resorcinol 0.1%: oxalic acid 0.01%: 0.1%, wood chip 0.5%, water 99.14% obtain concentration and are 0.86% the plugging agent aqueous solution.
Embodiment three: present embodiment is that 25～30% the compound polyamines of high molecular anion type polycrylamide, phenol, Resorcinol, oxalic acid, wood chip and water are formed by molecular weight＞1,900 ten thousand, degree of hydrolysis, their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: the compound polyamines of phenol 0.15%: Resorcinol 0.1%: oxalic acid 0.02%: 0.2%, wood chip 2.5%, water 97.03% obtain concentration and are 2.97% the plugging agent aqueous solution.
Embodiment four: present embodiment is that 25～30% the compound polyamines of high molecular anion type polycrylamide, phenol, Resorcinol, oxalic acid, wood chip and water are formed by molecular weight＞1,900 ten thousand, degree of hydrolysis, their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: the compound polyamines of phenol 0.5%: Resorcinol 0.1%: oxalic acid 0.01%: 0.1%, wood chip 0.5%, water 98.79% obtain concentration and are 1.21% the plugging agent aqueous solution.
Embodiment five: present embodiment is that 25～30% the compound polyamines of high molecular anion type polycrylamide, phenol, Resorcinol, oxalic acid, wood chip and water are formed by molecular weight＞1,900 ten thousand, degree of hydrolysis, their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: the compound polyamines of phenol 0.5%: Resorcinol 0.3%: oxalic acid 0.02%: 0.2%, wood chip 2.5%, water 96.48% obtain concentration and are 3.52% the plugging agent aqueous solution.
Embodiment six: present embodiment is that 25～30% the compound polyamines of high molecular anion type polycrylamide, phenol, Resorcinol, oxalic acid, wood chip and water are formed by molecular weight＞1,900 ten thousand, degree of hydrolysis, their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: the compound polyamines of phenol 0.25%: Resorcinol 0.15%: oxalic acid 0.01%: 0.2%, wood chip 2.5%, water 96.89% obtain concentration and are 3.11% the plugging agent aqueous solution.
Claims (7)
1, deep plugging agent containing wood dust and gel, it is characterized in that it is that 25～30% the compound polyamines of high molecular anion type polycrylamide, phenol, Resorcinol, oxalic acid, wood chip, water are formed by molecular weight＞1,900 ten thousand, degree of hydrolysis, their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: 0.15～0.5%, the compound polyamines of phenol: 0.1～0.3%, Resorcinol: 0.01～0.02%, oxalic acid: 0.1～0.2%, wood chip: 0.5～2.5%, water: 99.14～96.48%.
2, deep plugging agent containing wood dust and gel according to claim 1 is characterized in that their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: the compound polyamines of phenol 0.15%: Resorcinol 0.1%: oxalic acid 0.01%: 0.1%, wood chip 0.5%, water 99.14%.
3, deep plugging agent containing wood dust and gel according to claim 1 is characterized in that their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: the compound polyamines of phenol 0.15%: Resorcinol 0.1%: oxalic acid 0.02%: 0.2%, wood chip 2.5%, water 97.03%.
4, deep plugging agent containing wood dust and gel according to claim 1 is characterized in that their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: the compound polyamines of phenol 0.5%: Resorcinol 0.1%: oxalic acid 0.01%: 0.1%, wood chip 0.5%, water 98.79%.
5, deep plugging agent containing wood dust and gel according to claim 1 is characterized in that their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: the compound polyamines of phenol 0.5%: Resorcinol 0.3%: oxalic acid 0.02%: 0.2%, wood chip 2.5%, water 96.48%.
6, deep plugging agent containing wood dust and gel according to claim 1 is characterized in that their weight percent is: molecular weight＞1,900 ten thousand, degree of hydrolysis are 25～30% high molecular anion type polycrylamide: the compound polyamines of phenol 0.25%: Resorcinol 0.15%: oxalic acid 0.01%: 0.2%, wood chip 2.5%, water 96.89%.
7, according to each described deep plugging agent containing wood dust and gel of claim 1～6, the particle diameter that it is characterized in that described wood chip is 0.01～2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100096715A CN1315978C (en) | 2005-01-26 | 2005-01-26 | Deep plugging agent containing wood dust and gel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100096715A CN1315978C (en) | 2005-01-26 | 2005-01-26 | Deep plugging agent containing wood dust and gel |
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| Publication Number | Publication Date |
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| CN1654591A CN1654591A (en) | 2005-08-17 |
| CN1315978C true CN1315978C (en) | 2007-05-16 |
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| CNB2005100096715A Expired - Fee Related CN1315978C (en) | 2005-01-26 | 2005-01-26 | Deep plugging agent containing wood dust and gel |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797442B (en) * | 2011-05-27 | 2015-05-20 | 中国石油化工股份有限公司 | Deep fluid diversion method |
| CN110396279B (en) * | 2019-07-31 | 2022-04-29 | 北京中科安途交通科技有限公司 | Water-based self-breathing consolidation material for pavement sealing layer and preparation method thereof |
| CN114479818A (en) * | 2020-10-23 | 2022-05-13 | 中国石油天然气股份有限公司 | Channeling sealing agent and channeling sealing method for horizontal well of thick oil screen pipe well completion |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5134176A (en) * | 1989-10-16 | 1992-07-28 | Mobil Oil Corporation | Crosslinked polyvinyl amine copolymer gels for use under harsh reservoir conditions |
| CN1116229A (en) * | 1994-08-03 | 1996-02-07 | 吉林省油田管理局钻采工艺研究院 | Powder shape water adsorption profile adjusting agent for water flooding well |
| US6024167A (en) * | 1997-05-15 | 2000-02-15 | Cyrus A. Irani | Transporting waterflood mobility control agents to high permeability zones |
| CN1130439C (en) * | 2000-03-24 | 2003-12-10 | 大庆油田有限责任公司采油工艺研究所 | Profile control agent for delaying crosslinking depth |
-
2005
- 2005-01-26 CN CNB2005100096715A patent/CN1315978C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5134176A (en) * | 1989-10-16 | 1992-07-28 | Mobil Oil Corporation | Crosslinked polyvinyl amine copolymer gels for use under harsh reservoir conditions |
| CN1116229A (en) * | 1994-08-03 | 1996-02-07 | 吉林省油田管理局钻采工艺研究院 | Powder shape water adsorption profile adjusting agent for water flooding well |
| US6024167A (en) * | 1997-05-15 | 2000-02-15 | Cyrus A. Irani | Transporting waterflood mobility control agents to high permeability zones |
| CN1130439C (en) * | 2000-03-24 | 2003-12-10 | 大庆油田有限责任公司采油工艺研究所 | Profile control agent for delaying crosslinking depth |
Non-Patent Citations (1)
| Title |
|---|
| 凝胶型油井高温抗盐化学堵剂的研制与应用 党丽旻等，江汉石油学院学报，第24卷第3期 2002 * |
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| CN1654591A (en) | 2005-08-17 |
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Granted publication date: 20070516 Termination date: 20100228 |