CN102153994B - High-temperature miscible phase temporary plugging channeling sealing agent and preparation method thereof - Google Patents
High-temperature miscible phase temporary plugging channeling sealing agent and preparation method thereof Download PDFInfo
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Abstract
The invention provides a high-temperature miscible-phase temporary plugging channeling sealing agent which comprises urea, a film expanding agent, sodium dodecyl sulfate and a high-temperature foaming agent, wherein the weight ratio of the urea to the film expanding agent to the sodium dodecyl sulfate to the high-temperature foaming agent is 1: 0.12-0.25: 0.05-0.1. The invention also provides a preparation method of the high-temperature miscible phase temporary plugging and channeling agent and application of the high-temperature miscible phase temporary plugging and channeling agent in improving steam huff and puff/steam displacement exploitation effects of oil fields. The high-temperature miscible-phase temporary plugging and channeling agent can solve the steam channeling phenomenon in the steam huff and puff process, improve the steam huff and puff effect and improve the thick oil exploitation effect to the maximum extent.
Description
Technical field
The present invention relates to a kind of high temperature mixed phase and block temporarily and scurry agent and preparation method thereof, more specifically saying so blocks temporarily and scurries agent and preparation method thereof at existing vapour to scurry the serious and a kind of high temperature mixed phase that develop of phenomenon in Liaohe Oil Field steam stimulation or the steam flood process.
Background technology
The Liaohe Oil Field viscous crude accounts for more than 2/3rds, the main mode of exploitation is steam stimulation or steam flood, yet along with the exploitation round constantly increases, steam stimulation (steam flood replaces) effect is variation gradually, Liaohe Oil Field viscous oil recovery at present arrives " moisture, the high recovery percent of reserves of the two Gao-Gao " phase, cause the heavy crude heat extraction benefit sharply to descend, it is very low that most many rounds (more than 9 rounds) heavy oil wells continues to take steam stimulation or steam flood mode to exploit its cost performance, even negative benefit occurs.For improving steam stimulation (steam flood replaces) effect, in the heavy crude heat extraction process, take high temperature to block temporarily to scurry, multiple notes vapour additive such as displacement of reservoir oil auxiliary agent, purpose is to improve steam stimulation (steam flood replaces) effect, rig-site utilization also obtains certain effect, yet because envelope is scurried the temperature tolerance of agent, the limitation of aspects such as stifled intensity, selectivity temporarily, still fundamentally do not solve the vapour that exists in steam stimulation (steam flood replaces) process and scurry phenomenon, steam stimulation (steam flood replaces) effect is undesirable.
At the problem that exists in Liaohe Oil Field steam stimulation (steam flood replaces) process, develop blocking temporarily of excellent property and scurry agent, be to improve to improve pressing for of steam stimulation (steam flood replaces) effect.
Summary of the invention
Main purpose of the present invention is at having problems in Liaohe Oil Field steam stimulation (steam flood replaces) process, developing a kind of high temperature mixed phase blocks temporarily and scurries agent, scurry phenomenon with vapour in solution steam stimulation (steam flood replaces) process, improve steam stimulation (steam flood replaces) effect, improve the viscous oil recovery effect to greatest extent.
Another object of the present invention is to provide described high temperature mixed phase to block the preparation method who scurries agent temporarily.
The present invention mainly is that causative mechanism, degree, the type characteristic that the vapour that exists from analyze steam stimulation (steam flood for) process is scurried phenomenon started with, in conjunction with on-the-spot in the heavy crude heat extraction process, take high temperature to block temporarily to scurry, the state of the art of multiple notes vapour additive such as displacement of reservoir oil auxiliary agent, scurry high temperature mixed phase that phenomenon develops and block temporarily and scurry agent for solving the vapour that exists in steam stimulation (steam flood for) process to greatest extent.
The invention provides a kind of high temperature mixed phase blocks temporarily and scurries agent, the raw material composition that this envelope is scurried agent comprises urea, thin film spreading agent, sodium laurylsulfonate (sulfonated petro-leum) and high-temp foaming agent, wherein, the weight ratio of described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent is 1: 0.12～0.25: 0.12～0.25: 0.05～0.1.
According to specific embodiments of the present invention, high temperature mixed phase of the present invention blocks temporarily scurries in the agent, and urea (urea) is that the present invention seals the core of scurrying agent, and the decomposition of urea produces gas (nitrogen, carbonic acid gas, ammonia), is to form heterogeneous foam basic substance.
According to specific embodiments of the present invention, high temperature mixed phase of the present invention blocks temporarily scurries in the agent, thin film spreading agent belongs to non-ionic (polymeric surfactant), and it is the state of interface that improves between oil, water, rock that this composition mainly acts on, and improves envelope and scurries agent stability and level of response.According to specific embodiments of the present invention, high temperature mixed phase of the present invention blocks temporarily scurries in the agent, described thin film spreading agent is by the segmented copolymer of polyethylene oxide, oxyethane, the propylene oxide (thin film spreading agent of producing available from sea ,-Panjin Liaohe Oil Field chemical industry company limited of WorldCom, specification and model EOR-TFS/LH-I, standard Q/CNPC-LH0484-2006).
According to specific embodiments of the present invention, high temperature mixed phase of the present invention blocks temporarily scurries in the agent, sodium laurylsulfonate (sulfonated petro-leum) is a kind of cats product, it is to improve envelope to scurry the agent heat resistance that this composition mainly acts on, reduce fluid interface tension force, improve oil displacement efficiency and envelope and scurry agent stability and level of response.
According to specific embodiments of the present invention, high temperature mixed phase of the present invention blocks temporarily scurries in the agent, used high-temp foaming agent is a kind of surface-active material, its role is to reduce the surface tension of liquid-gas interface, improve bubble performance (size of bubble, quantity, elasticity, homogeneity, stability, portative power etc.), and make envelope scurry agent and can produce stable foam etc.The preferred pore forming material of the present invention is No. two oil, molecular formula: C
10H
17OH, this material are mainly used in multiple metal and the good pore forming material of nonmetal flotation, can be used with multiple sodium xanthate, also can do flotation collector separately and use, and are used for the drainage technology of oil recovery (gas production) well.
In a specific embodiments of the present invention, the weight ratio of described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent is about 1: 0.14: 0.21: 0.07.
In another specific embodiments of the present invention, the weight ratio of described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent is about 1: 0.21: 0.14: 0.07.
In another specific embodiments of the present invention, the weight ratio of described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent is about 1: 0.12: 0.25: 0.07.
According to specific embodiments of the present invention, high temperature mixed phase of the present invention blocks temporarily scurries agent and prepares in accordance with the following methods:
(1) quantitatively prepares each reagent according to the proportioning of described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent;
(2) temperature of reaction kettle was transferred to 80～90 ℃ of constant temperature 30～60 minutes;
The thin film spreading agent that (3) will quantitatively take by weighing adds reactor, evenly stirs 15～30 minutes;
(4) the slow sodium laurylsulfonate that quantitatively takes by weighing of adding evenly stirred 15～30 minutes, and temperature of reaction kettle was transferred to 40～55 ℃ of constant temperature 30～60 minutes;
The urea that (5) will quantitatively take by weighing adds reactor, evenly stirs 30～45 minutes;
The high-temp foaming agent that (6) will quantitatively take by weighing adds reactor, evenly stirs 30～60 minutes, obtains described high temperature mixed phase and blocks temporarily and scurry agent.
According to specific embodiments of the present invention, high temperature mixed phase of the present invention blocks temporarily scurries agent, 6～8,25 ℃ of density 1.00～1.20g/cm of its pH value
3, stifled intensity 〉=3MPa temporarily, heatproof 〉=260 ℃.
On the other hand, the present invention also provides described high temperature mixed phase to block the preparation method who scurries agent temporarily, and this method comprises:
(1) quantitatively prepares each reagent according to the proportioning of described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent;
(2) temperature of reaction kettle was transferred to 80～90 ℃ of constant temperature 30～60 minutes;
The thin film spreading agent that (3) will quantitatively take by weighing adds reactor, evenly stirs 15～30 minutes;
(4) the slow sodium laurylsulfonate that quantitatively takes by weighing of adding evenly stirred 15～30 minutes, and temperature of reaction kettle was transferred to 40～55 ℃ of constant temperature 30～60 minutes;
The urea that (5) will quantitatively take by weighing adds reactor, evenly stirs 30～45 minutes;
The high-temp foaming agent that (6) will quantitatively take by weighing adds reactor, evenly stirs 30～60 minutes, obtains described high temperature mixed phase and blocks temporarily and scurry agent.
According to specific embodiments of the present invention, high temperature mixed phase of the present invention blocks among the preparation method who scurries agent temporarily, the temperature tolerance that the adding speed of sodium laurylsulfonate is scurried agent for envelope in the step (4) has material impact, should slowly add, the present invention preferably controls adding speed smaller or equal to 1000 gram/minute, more preferably 600～800 gram/minute.
High temperature mixed phase of the present invention blocks among the preparation method who scurries agent temporarily, and the thin film spreading agent of step (3) just can carry out step (4) operation after must guaranteeing to mix, being heated evenly; Step (4) just can be lowered the temperature after system is heated evenly guaranteeing, bubble (5) otherwise cause step easily, and the influence envelope is scurried agent stability.
The present invention is by carrying out rational proportion with described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent, and pass through appropriate process, developed a kind of high temperature mixed phase and blocked temporarily and scurry agent, this high temperature mixed phase blocks temporarily scurries the agent physical and chemical index and can reach following standard:
High temperature mixed phase of the present invention blocks temporarily scurries agent, can solve in steam stimulation (steam flood for) process vapour and scurry phenomenon, improves steam stimulation (steam flood for) effect, improves the viscous oil recovery effect to greatest extent.
On the other hand, the present invention also provides described high temperature mixed phase to block temporarily to scurry agent improving oil field steam stimulation/steam flood for the application in the coefficient of mining.During concrete the application, be according on take turns average steam injection pressure situation and determine that envelope scurries the agent consumption: on take turns average steam injection pressure 〉=13.5MPa, envelope is scurried 6～8 tons of agent consumptions; The average steam injection pressure 8～13.5MPa of last wheel, envelope is scurried 8～12 tons of agent consumptions; Average steam injection pressure≤the 8MPa of last wheel, envelope is scurried 12～15 tons of agent consumptions.After definite envelope is scurried the agent consumption, can utilize steam injection string that envelope is scurried the agent preparation and inject the stratum into about 15% aqueous solution; Replace the reaction for the treatment of agent (volume is about 1.2 times of tubing string volume) closing well and started the vapour program of annotating in 4～6 hours.Can fundamentally solve the vapour that exists in steam stimulation (steam flood replaces) process and scurry phenomenon, reach raising steam stimulation/steam flood for exploitation effect.
The effect of invention:
In sum, the invention provides a kind of high temperature mixed phase and block temporarily and scurry agent, be mainly used in the vapour that exists in Liaohe Oil Field steam stimulation (steam flood for) process and scurry phenomenon and remove, improve steam stimulation (steam flood for) exploitation effect.Envelope of the present invention has been scurried agent since in June, 2007 site of deployment, priority is in oil recovery factory, Jinzhou, dawn oil recovery factory, cold family Oilfield Company, special oily company, Huanxiling oil production plant, the oil gas pilot production company rig-site utilization of Liaohe Oil Field, add up to implement 35 wells by October 20 in 2009, measure efficient 88.6%, obtain to block temporarily significantly and scurry effect, the average steam injection pressure 3.5MPa that improves, average period, incremental oil production was 485 tons.
Embodiment
Below describe technology of the present invention and characteristics in detail by specific embodiment, but these embodiment are not in order to limit protection scope of the present invention.
Embodiment 1
In the present embodiment, synthetic envelope is scurried the agent proportioning and is about:
Urea: thin film spreading agent: sulfonated petro-leum: high-temp foaming agent=1: 0.21: 0.14: 0.07.
The high temperature mixed phase of present embodiment blocks the preparation method who scurries agent temporarily:
1, scurries the agent proportioning according to envelope and quantitatively prepare each reagent;
2, reactor starts and temperature was transferred to 85 ℃ of constant temperature 30 minutes;
3, take by weighing 1.2 tons of adding reactors of thin film spreading agent, evenly stirred (60 rev/mins) 25 minutes;
4, slow (adding speed 1000 Grams Per Minutes) add 0.8 ton sulfonated petro-leum, evenly stir 15 minutes, and temperature of reaction kettle was transferred to 45 ℃ of constant temperature 30 minutes;
5.6 tons of ureas that 5, will take by weighing add reactor, evenly stir 30 minutes;
0.4 ton of high-temp foaming agent that 6, will take by weighing adds reactor, evenly stirs 30 minutes, and namely 8 tons of high temperature mixed phases of synthetic present embodiment block temporarily and scurry the agent product.
After testing, the high temperature mixed phase of present embodiment blocks temporarily scurries the agent product, 6～8,25 ℃ of density 1.00～1.20g/cm of pH value
3, stifled intensity 〉=3MPa temporarily, heatproof 〉=260 ℃, on take turns steam injection pressure 10.5MPa.
Embodiment 2
The proportioning that the synthetic envelope of present embodiment is scurried agent is about:
Urea: thin film spreading agent: sulfonated petro-leum: high-temp foaming agent=1: 0.14: 0.21: 0.07.
The high temperature mixed phase of present embodiment blocks the preparation method who scurries agent temporarily:
1, scurries the agent proportioning according to envelope and quantitatively prepare each reagent;
2, reactor starts and temperature was transferred to 80 ℃ of constant temperature 50 minutes;
3, take by weighing 1 ton of adding reactor of thin film spreading agent, evenly stirred (60 rev/mins) 20 minutes;
4, slow (adding speed 800 Grams Per Minutes) add 1.5 tons sulfonated petro-leum, evenly stir 25 minutes, and temperature of reaction kettle was transferred to 50 ℃ of constant temperature 30 minutes;
7 tons of ureas that 5, will take by weighing add reactor, evenly stir 30 minutes;
0.5 ton of high-temp foaming agent that 6, will take by weighing adds reactor, evenly stirs 40 minutes, and namely 10 tons of high temperature mixed phases of synthetic present embodiment block temporarily and scurry the agent product.
After testing, the high temperature mixed phase of present embodiment blocks temporarily scurries the agent product, 6～8,25 ℃ of density 1.00～1.20g/cm of pH value
3, stifled intensity 〉=5MPa temporarily, heatproof 〉=300 ℃, on take turns steam injection pressure 14.5MPa.
Embodiment 3
The proportioning that the synthetic envelope of present embodiment is scurried agent is about:
Urea: thin film spreading agent: sulfonated petro-leum: high-temp foaming agent=1: 0.12: 0.25: 0.07.
The high temperature mixed phase of present embodiment blocks the preparation method who scurries agent temporarily:
1, scurries the agent proportioning according to envelope and quantitatively prepare each reagent;
2, reactor starts and temperature was transferred to 85 ℃ of constant temperature 30 minutes;
3, take by weighing 0.8 ton of adding reactor of thin film spreading agent, evenly stirred (60 rev/mins) 15 minutes;
4, slow (adding speed 800 Grams Per Minutes) add 1.7 tons sulfonated petro-leum, evenly stir 30 minutes, and temperature of reaction kettle was transferred to 45 ℃ of constant temperature 50 minutes;
6.7 tons of ureas that 5, will take by weighing add reactor, evenly stir 40 minutes;
0.5 ton of high-temp foaming agent that 6, will take by weighing adds reactor, evenly stirs 50 minutes, and namely 9.7 tons of high temperature mixed phases of synthetic present embodiment block temporarily and scurry the agent product.
After testing, the high temperature mixed phase of present embodiment blocks temporarily scurries the agent product, 6～8,25 ℃ of density 1.00～1.20g/cm of pH value
3, stifled intensity 〉=5MPa temporarily, heatproof 〉=330 ℃, on take turns steam injection pressure 16.5MPa.
Application Example
Envelope of the present invention scurry agent successively in the oil recovery factory, Jinzhou of Liaohe Oil Field, rig-site utilization such as dawn oil recovery factory, cold family Oilfield Company, special oily company, Huanxiling oil production plant, oil gas pilot production company, can remove the vapour that exists in oil field steam stimulation (steam flood replaces) process and scurry phenomenon, improve steam stimulation (steam flood replaces) exploitation effect.Following table 1 has been listed and has partly been represented well and carry out the effect that the high temperature mixed phase blocks the measure of scurrying temporarily.
Table 1 represents well to carry out the high temperature mixed phase and blocks temporarily and scurry statistical effect before and after the measure
Wherein, calculate according to Darcy's law, service shaft core intersection, medicament (envelope is scurried agent) working concentration, Jin7-10-6Jing, the required pure medicament of cold 41-5-7 well are 8 tons, and these 2 mouthfuls of wells are to adopt the envelope of embodiment 1 to scurry the agent rig-site utilization; The required pure medicament of daybreak 1-10-08 well is 10 tons, and this well is to adopt the envelope of embodiment 2 to scurry the agent rig-site utilization; The joyous required pure medicament of 127-2-5 well is 9.7 tons, and this well is to adopt the envelope of embodiment 3 to scurry the agent rig-site utilization.
Claims (8)
1. a high temperature mixed phase blocks temporarily and scurries agent, the raw material composition that this envelope is scurried agent comprises urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent, wherein, the weight ratio of described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent is 1: 0.12～0.25: 0.12～0.25: 0.05～0.1;
Wherein, described thin film spreading agent is the segmented copolymer of polyethylene oxide, oxyethane, propylene oxide;
Described high-temp foaming agent is No. two oil.
2. high temperature mixed phase according to claim 1 blocks temporarily and scurries agent, wherein, the weight ratio of described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent is 1: 0.14: 0.21: 0.07 or 1: 0.21: 0.14: 0.07 or 1: 0.12: 0.25: 0.07.
3. high temperature mixed phase according to claim 1 blocks temporarily and scurries agent, and this envelope is scurried agent and prepared in accordance with the following methods:
(1) quantitatively prepares each reagent according to the proportioning of described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent;
(2) temperature of reaction kettle was transferred to 80～90 ℃ of constant temperature 30～60 minutes;
The thin film spreading agent that (3) will quantitatively take by weighing adds reactor, evenly stirs 15～30 minutes;
(4) the slow sodium laurylsulfonate that quantitatively takes by weighing of adding evenly stirred 15～30 minutes, and temperature of reaction kettle was transferred to 40～55 ℃ of constant temperature 30～60 minutes;
The urea that (5) will quantitatively take by weighing adds reactor, evenly stirs 30～45 minutes;
The high-temp foaming agent that (6) will quantitatively take by weighing adds reactor, evenly stirs 30～60 minutes, obtains described high temperature mixed phase and blocks temporarily and scurry agent.
4. high temperature mixed phase according to claim 1 blocks temporarily and scurries agent, and wherein, this envelope is scurried 6～8,25 ℃ of density 1.00～1.20g/cm of pH value of agent
3, stifled intensity 〉=3MPa temporarily, heatproof 〉=260 ℃.
5. each described high temperature mixed phase of claim 1～4 blocks the preparation method who scurries agent temporarily, and this method comprises:
(1) quantitatively prepares each reagent according to the proportioning of described urea, thin film spreading agent, sodium laurylsulfonate and high-temp foaming agent;
(2) temperature of reaction kettle was transferred to 80～90 ℃ of constant temperature 30～60 minutes;
The thin film spreading agent that (3) will quantitatively take by weighing adds reactor, evenly stirs 15～30 minutes;
(4) the slow sodium laurylsulfonate that quantitatively takes by weighing of adding evenly stirred 15～30 minutes, and temperature of reaction kettle was transferred to 40～55 ℃ of constant temperature 30～60 minutes;
The urea that (5) will quantitatively take by weighing adds reactor, evenly stirs 30～45 minutes;
The high-temp foaming agent that (6) will quantitatively take by weighing adds reactor, evenly stirs 30～60 minutes, obtains described high temperature mixed phase and blocks temporarily and scurry agent.
6. method according to claim 5, wherein, the adding speed of sodium laurylsulfonate is smaller or equal to 1000 gram/minute in the step (4).
7. each described high temperature mixed phase of claim 1～4 blocks temporarily and scurries agent and improving oil field steam stimulation/steam flood for the application in the exploitation effect.
8. application according to claim 7, wherein, according on take turns average steam injection pressure situation and determine that envelope scurries the agent consumption: on take turns average steam injection pressure 〉=13.5MPa, envelope is scurried 6～8 tons of agent consumptions; The average steam injection pressure 8～13.5MPa of last wheel, envelope is scurried 8～12 tons of agent consumptions; Average steam injection pressure≤the 8MPa of last wheel, envelope is scurried 12～15 tons of agent consumptions.
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Families Citing this family (3)
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| CN105738277B (en) * | 2016-02-17 | 2018-07-10 | 中国石油天然气股份有限公司 | Method for detecting bonding strength of channeling sealing agent |
| CN109025894B (en) * | 2017-06-08 | 2021-10-22 | 中国石油化工股份有限公司 | Steam channeling plugging method for horizontal well for thermal recovery of thickened oil |
| CN111119824A (en) * | 2019-12-25 | 2020-05-08 | 中国石油天然气股份有限公司 | Method for improving steam huff and puff later development effect of thickened oil |
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