CN101550333B - Novel complex surface active degradation agent used for releasing the blocking of Polymer/Surfactant flooding - Google Patents
Novel complex surface active degradation agent used for releasing the blocking of Polymer/Surfactant flooding Download PDFInfo
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- CN101550333B CN101550333B CN2009100721019A CN200910072101A CN101550333B CN 101550333 B CN101550333 B CN 101550333B CN 2009100721019 A CN2009100721019 A CN 2009100721019A CN 200910072101 A CN200910072101 A CN 200910072101A CN 101550333 B CN101550333 B CN 101550333B
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- degradation agent
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- degradation agents
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Abstract
The present invention relates to a novel complex surface active degradation agent used for releasing the blocking of surfactant flooding. The invention mainly settles a problem that the well blocking of polymer/surfactant affects the recovery rate of oil accumulation. The invention is characterized in that the components and matching ratio are as follows by weight: 0.03-3.0% of surface activity degradation agent, 0.1-3.0% of weak degradation agent, and the balance of water. The complex active degradation agent is used for deblocking oil-water well of polymer/surfactant flooding in tertiary oilrecovery. The oil layer can be excellently protected. Furthermore the complex surface active degradation agent used for releasing the blocking of surfactant flood further has the following advantages of good compatibility with stratum, no pollution, excellent fluidity, good safety, good environment-protecting property, long effective period and satisfaction to the field construction requirement.
Description
Technical field:
The present invention relates to a kind of degradation agents used in the tertiary oil production in oil field field, particularly a kind ofly be used to remove the agent of poly-table and drive the NEW TYPE OF COMPOSITE surfactivity degradation agents of obstruction.
Background technology:
In short supply day by day along with the energy, how the surplus oil in displacement oil field guarantees that crude oil continues the major issue that stable yields has become current national energy strategy.What adopt now is that the tertiary oil recovery method mainly is polymer injection and ternary composite driving, can improve oil recovery rate more than 30%.Because the agent of poly-table is the polymer polymeric surfactant, its molecular structure is with the characteristics of polymkeric substance and tensio-active agent, and its oil increasing effect is better than polymkeric substance, so China has begun to replace polymer flooding with the agent of poly-table.The poly-table agent displacement of reservoir oil is to point to inject high-molecular weight water-soluble poly table agent solution in the oil reservoir, increases the viscosity of sweeping phase, improves mobility ratio, improves sweep efficiency, thereby improves the flooding method of oil recovery factor.The agent of poly-table is driven enlarging swept volume, so it more is applicable to the oil reservoir that nonuniformity is stronger, can improve the oil recovery factor of water drive exploitation oil reservoir effectively, and therefore poly-table agent is at present driven and had development potentiality at home and abroad.But agent is the same with polymkeric substance can stop up the stratum for poly-table.The absorption of poly-table agent in porous medium is detained in the oil displacement process, poly-table agent solution concentration and viscosity are reduced, controllability to mobility reduces, the oil displacement efficiency variation, and the absorption hold-up when big in addition can cause follow-up poly-table agent since injection pressure rapidly raising annotate to advance, overall injection situation variation, the injection pressure that quite a few well arranged near or reach the parting pressure of oil reservoir, sleeve pipe well damage.In order to slow down the sleeve pipe damage intensity, be forced to reduce rate of injection, effect is driven in the agent of the poly-table of influence.
Become increasingly conspicuous with the poly-table agent well blockage problem of showwing loving care for, the research of poly-table agent block releasing technique receives much concern.In recent years, though China has obtained immense success to the research of polymer injection well block releasing technique, yet there are no report for removing poly-table agent displacement of reservoir oil well choked technique.
The utility model content:
The invention reside in the problem that overcomes the poly-table of the notes agent well congestion affects oil recovery that exists in the background technology, be used to remove the agent of poly-table and drive the NEW TYPE OF COMPOSITE surfactivity degradation agents of obstruction and provide a kind of, this compound surface active degradation agent has characteristics good, pollution-free with the stratum compatibleness, good fluidity.
The present invention solves its problem and can reach by following technical solution: this is used to remove the agent of poly-table and drives the NEW TYPE OF COMPOSITE surfactivity degradation agents of obstruction, its component and proportioning concentration by mass percentage are as follows: surfactivity degradation agents 0.03～3.0%, weak degradation agents 0.1～3.0%, surplus is a water.
The surfactivity degradation agents is one or more the compound in the following medicament: 1203 (lauryl ether sulfosuccinic ester disodiums), 0910 (nonyl phenol ether sulfosuccinic acid esters disodium), sodium lauryl sulphate, Sodium dodecylbenzene sulfonate.
Weak degradation agents is one or both the compound in the superoxide.
Described superoxide is H
2O
2, Peracetic Acid.
Can also add mass percent concentration and be one or both the compound in the following medicament of 0.1-1.0%: oxalic acid, citric acid.
The present invention compares with the above-mentioned background technology can have following beneficial effect: a kind ofly be used for removing the agent of poly-table and drive the NEW TYPE OF COMPOSITE surfactivity degradation agents of obstruction and be used for the de-plugging of the poly-table of tertiary oil recovery agent displacement of reservoir oil well, can protect oil reservoir well, good with the stratum compatibleness, pollution-free, good fluidity, safety and environmental protection, validity period is long, can satisfy the site operation requirement; Applying of it has economic and social benefit widely.
Embodiment:
The invention will be further described below in conjunction with embodiment:
This is used to remove the agent of poly-table, and to drive the NEW TYPE OF COMPOSITE surfactivity degradation agents component and the proportioning of obstruction as follows by weight: surfactivity degradation agents 0.03～3.0%, and weak degradation agents 0.1～3.0%, surplus is a water; In order to enlarge the de-plugging scope, prolong the validity period of service shaft, can also add mass percent concentration and be one or both the compound in the following medicament of 0.1-1.0%: oxalic acid, citric acid.
This compound surface active degradation agent compounding method: after ratio is mixed according to the needs of on-the-spot practical application on request with surfactivity degradation agents, weak degradation agents, water, oxalic acid, citric acid, at room temperature stir 5min, can obtain this compound surface active degradation agent.
The experiment and the method for calculation of used rate of permeation of present embodiment and de-plugging rate are as follows:
(1) measure the rock core basic data, synthetic core is evacuated, oven dry obtains its length L and floorage A.
(2) survey rate of permeation K with the water of simulated formation water (salinity 6778mg/L) survey rock core
1, K
1Survey rate of permeation for the initial condition of rock core, injection pressure is P
1, flow is Q
1
(3) sewage of annotating 3500mg/L gathers the table agent solution, annotates 1h, leaves standstill 1h, and so circulation is risen significantly up to injection pressure several times, and when the trend of overrange was arranged, notes saturation simulation local water was surveyed the rate of permeation K after the agent of poly-table is stopped up
2, the injection pressure of this moment is P
2, flow is Q
2
(4) explain the agent of blocking agent compound surface active degradation.The agent of unblocking agent compound surface active degradation is annotated in the rock core after the 5PV slowly, after treating the complete displacement of saturation simulation local water in the rock core come out, termination of pumping, it is to be measured to leave standstill 24h.
(5) injection molding is intended the core permeability K after local water is surveyed de-plugging
3, injection pressure is P
3, flow is Q
3
(6) calculating of rate of permeation, injury rate and de-plugging rate (rate of permeation recovery rate).
Rate of permeation is calculated with Darcy formula:
Rate of permeation
K--rate of permeation in the formula, * 10
-3μ m
2
The Q--fluid flow rate, mL/min;
The injection pressure of P--rock core, MPa;
μ--fluid viscosity, mPas;
The length of L--rock core, cm;
The A--core section is long-pending, cm
2
The calculating of core damage rate and de-plugging rate (rate of permeation recovery rate):
Injury rate=(K
1-K
2)/K
1* 100%
De-plugging rate=(K
1-K
3)/K
1* 100%
Recovery rate=K
3/ K
1* 100%
Embodiment 1～11
Adopt synthetic core, specification Φ 2.5cm * 10.0～10.3cm, perm-plug method is 335 * 10
-3～393 * 10
-3μ m
2Rock core is injected in the poly-table of high density (3500mg/L) agent that utilizes the sewage preparation reach 5PV, simulated formation stops up, cause its hole of about 80% to stop up, the compound surface active degradation agent de-plugging of filling a prescription respectively with multiple different concns in the table 1, under 45 ℃ of conditions, reaction times 24h, experimental result sees Table 2:
Table 1
| Embodiment | 1203 ％ | 0910 ％ | Sodium lauryl sulphate % | Sodium dodecylbenzene sulfonate % | H 2O 2 ％ | Peracetic Acid % | Oxalic acid % | Citric acid % |
| 1 | 0.3 | 0.1 | 1.0 | 0.5 | ||||
| 2 | 2.5 | 0.5 | 0.5 | 0.3 | ||||
| 3 | 0.3 | 2.7 | 1.0 | |||||
| 4 | 0.2 | 0.1 | 1.0 | |||||
| 5 | 0.1 | 0.15 | 1.0 | 1.0 | ||||
| 6 | 2.7 | 0.3 | 1.0 | |||||
| 7 | 0.2 | 0.5 | 0.5 | 0.5 | ||||
| 8 | 0.02 | 0.01 | 3.0 | 0.1 | ||||
| 9 | 2.0 | 1.0 | 0.1 | 0.1 | 1.0 | |||
| 10 | 0.3 | 1.0 | 0.5 | |||||
| 11 | 0.3 | 0.5 | 0.5 | 0.5 |
Rock core de-plugging experiment (annotate poly-table agent 5PV, flow is 1mL/min) is stopped up in the agent of the poly-table of table 2
| The rock core numbering | Rock core length cm | Volume of voids cm 3 | Perm-plug method 10 -3μm 2 | Rock core preliminary examination waterflood permeability 10 -3μm 2 | Rate of permeation 10 behind the rock core damage -3μm 2 | Rock core damage rate % | Embodiment | Rock core recovers back waterflood permeability 10 -3μm 2 | Rock core recovery rate % |
| 1 | 10.1 | 10.21 | 393 | 241.6 | 56.3 | 76.7 | 1 | 203.4 | 84.2 |
| 2 | 10.2 | 10.09 | 356 | 215.1 | 49.1 | 77.2 | 2 | 176.2 | 81.9 |
| 3 | 10.3 | 10.13 | 372 | 228.3 | 53.2 | 76.7 | 3 | 182.9 | 80.1 |
| 4 | 10.0 | 10.21 | 335 | 209.6 | 47.6 | 77.3 | 4 | 158.4 | 75.6 |
| 5 | 10.1 | 10.20 | 385 | 240.5 | 55.1 | 77.1 | 5 | 186.4 | 77.5 |
| 6 | 10.1 | 10.21 | 376 | 230.7 | 51.0 | 76.9 | 6 | 183.6 | 79.6 |
| 7 | 10.2 | 10.21 | 378 | 231.5 | 53.2 | 77.0 | 7 | 173.8 | 75.1 |
| 8 | 10.2 | 10.20 | 385 | 230.8 | 54.2 | 76.5 | 8 | 173.1 | 75.0 |
| 9 | 10.1 | 10.21 | 376 | 231.7 | 53.5 | 76.9 | 9 | 190.7 | 82.3 |
| 10 | 10.1 | 10.19 | 379 | 229.7 | 52.6 | 77.1 | 10 | 168.8 | 73.5 |
| 11 | 10.2 | 10.17 | 382 | 235.1 | 53.6 | 77.2 | 11 | 165.5 | 70.4 |
Visible this compound surface active degradation agent is used for the de-plugging of the poly-table of tertiary oil recovery agent displacement of reservoir oil well from all embodiment, have well and to remove the effect of stopping up, recovering oil reservoir,, good fluidity good, pollution-free, safety and environmental protection with the stratum compatibleness, validity period is long, can satisfy the site operation requirement.Applying of it has economic and social benefit widely.
Claims (2)
1. one kind is used to remove the agent of poly-table and drives the NEW TYPE OF COMPOSITE surfactivity degradation agents of obstruction, and it is characterized in that: its component and proportioning concentration by mass percentage are as follows: surfactivity degradation agents 0.03～3.0%, and weak degradation agents 0.1～3.0%, surplus is a water; Described surfactivity degradation agents is one or more the compound in the following medicament: 1203 lauryl ether sulfosuccinic ester disodiums, 0910 nonyl phenol ether sulfosuccinic acid esters disodium, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate; Described weak degradation agents is H
2O
2, Peracetic Acid.
2. according to claim 1ly be used to remove the agent of poly-table and drive the NEW TYPE OF COMPOSITE surfactivity degradation agents of obstruction, it is characterized in that: can also add mass percent concentration and be one or both the compound in the following medicament of 0.1-1.0%: oxalic acid, citric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100721019A CN101550333B (en) | 2009-05-20 | 2009-05-20 | Novel complex surface active degradation agent used for releasing the blocking of Polymer/Surfactant flooding |
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|---|---|---|---|
| CN2009100721019A CN101550333B (en) | 2009-05-20 | 2009-05-20 | Novel complex surface active degradation agent used for releasing the blocking of Polymer/Surfactant flooding |
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|---|---|
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| CN101550333B true CN101550333B (en) | 2011-01-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011883A (en) * | 2017-03-30 | 2017-08-04 | 中国石油天然气股份有限公司 | It is a kind of for de-plugging agent of polymer-bearing waste-water water injection well and preparation method and application |
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| CN104212426A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Wrapped profile control degradation agent |
| CN106761559A (en) * | 2015-11-24 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of injection region oil-water well increasing yield and injection technique |
| CN109777390A (en) * | 2019-03-27 | 2019-05-21 | 西安元和利馨能源科技有限公司 | A kind of oil field ultra-permeable reservior nano polysilicon system composite blockage relieving agent and preparation method thereof |
| CN111019620A (en) * | 2019-12-31 | 2020-04-17 | 田春来 | Oil field flowback-free stratum blocking remover and blocking removing method thereof |
| CN113025294B (en) * | 2021-03-26 | 2022-02-01 | 大庆井升伟业油田技术服务有限公司 | Plugging-removing injection-increasing agent suitable for chemical flooding sewage reinjection well and process |
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| CN101279938A (en) * | 2007-04-04 | 2008-10-08 | 中国石油化工股份有限公司 | Alkyl phenol sulfonic polyethenoxy ether sodium monosulfosuccinates and preparation thereof |
-
2009
- 2009-05-20 CN CN2009100721019A patent/CN101550333B/en not_active Expired - Fee Related
Patent Citations (5)
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|---|---|---|---|---|
| CN1080943A (en) * | 1992-03-17 | 1994-01-19 | 鲁布里佐尔公司 | The composition that contains succinic acylating agent or hydroxyaromatic derivative |
| CN1702293A (en) * | 2005-05-27 | 2005-11-30 | 大庆沃太斯化工有限公司 | Biological enzyme oil layer blocking remover |
| WO2007066254A2 (en) * | 2005-12-05 | 2007-06-14 | Schlumberger Canada Limited | Degradable material assisted diversion or isolation |
| CN101235279A (en) * | 2007-02-02 | 2008-08-06 | 富顺集团控股有限公司 | Highly effective viscosity-reducing agent for thermodynamic oil extraction process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011883A (en) * | 2017-03-30 | 2017-08-04 | 中国石油天然气股份有限公司 | It is a kind of for de-plugging agent of polymer-bearing waste-water water injection well and preparation method and application |
| CN107011883B (en) * | 2017-03-30 | 2020-02-14 | 中国石油天然气股份有限公司 | Blocking remover for polymer-containing sewage injection well and preparation method and application thereof |
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| CN101550333A (en) | 2009-10-07 |
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