CN104060974A - Integrated technology of equal fluidity oil displacement and profile control - Google Patents
Integrated technology of equal fluidity oil displacement and profile control Download PDFInfo
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- CN104060974A CN104060974A CN201410118513.2A CN201410118513A CN104060974A CN 104060974 A CN104060974 A CN 104060974A CN 201410118513 A CN201410118513 A CN 201410118513A CN 104060974 A CN104060974 A CN 104060974A
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Abstract
The invention discloses an integrated technology of equal fluidity oil displacement and profile control, and solves the problems that since oil layer profile control operation and oil field infusion process are conducted respectively, the profile control agent only has the blocking function without the oil displacement effect, and the impregnant only has the oil displacement function without the blocking effect. According to the method, a chemical agent is injected from a water well end equal fluidity three-plug for a plurality of rounds; the profile control agent is injected from an oil well end equal fluidity three-plug for a plurality of rounds to a high water content high infiltration channel of the corresponding water well; the high concentration plugs, the middle concentration plugs and the low concentration plugs of the two injection agents are soluble with water in the high infiltration zone between the two injection agents, so that a third agent, namely an efficient oil displacement agent, is combined through conversion, is extruded into a middle infiltration zone and a low infiltration zone, and is used for driving and replacing the water-containing raw oil in the middle infiltration band and the low infiltration band and increasing sweep volume and oil displacement efficiency. The integrated technology provided by the invention has better capacity of reducing high infiltration channel fluidity water controlling, improving liquid producing capacity of the middle infiltration layer and the low infiltration layer, increasing effective utilization and oil displacement efficiency of the injection agencies, and reducing total consumption, injection time and injection cost of the injection agencies, so that the purposes of systematic oil increase and cost reduction are generally realized.
Description
Technical field
The present invention relates to the profile control technology of oil reservoir in oilfield development process and the displacement of reservoir oil injection technology in oil field.
Background technology
At present, in oil field development injection process, the consideration that there is no the integrated and three doses of unifications of technique is injected in the measure of oil reservoir profile control and oil field, profile control and injection operation separately, and profile control agent only has plugging action, there is no oil displacement efficiency, injectant only has displacement of reservoir oil effect, there is no plugging effect, do not consider that deep profile controlling and injection technology organically combine, the not problem of the collaborative and maximizing the benefits of research effect, as conventional method profile control, arbitrary period that may be in water filling, chemical injection process, deep profile controlling, injection technology effect efficiency is collaborative considers; In addition, no matter be oil reservoir deep profile controlling technology, or heavy crude heat extraction profile control technique, with effectively shutoff high permeability formation advantage passage of existing profile control agent, but may produce oil layer blocking and pollution simultaneously, affect high displacement of oozing remaining oil in reservoir, all do not consider to inject deep profile controlling integrated technique.
Summary of the invention
Object of the present invention, for the problem existing in background technology, provides a kind of mobility displacement of reservoir oil and profile control integrated technique of waiting, and in this technology, profile control agent both can play the effect of shutoff, had oil displacement efficiency simultaneously.
For achieving the above object, the technical solution used in the present invention is: a kind of mobility displacement of reservoir oil and profile control integrated technique of waiting, and the concrete steps of this technology are as follows:
The first step: injected water is got through the passage between oil-water well;
Second step: inject chemical agent from the many rounds of the mobilities such as well end three slug, wherein:
The first round first slug, low pressure 1-2 MPa injects high sticky chemical agent;
The first round second slug, middle pressure 3-4 MPa injects sticky chemical agent;
The first round the 3rd slug, high pressure 4-5 MPa injects low sticky chemical agent;
According to mobility three slugs such as identical injection mode inject second and third,---, n takes turns chemical agent;
The 3rd step: from mobility three many rounds of slug injection profile agent such as oil well ends, this profile control agent and the chemical agent injecting from the many rounds of the mobilities such as well end three slug described in back are identical material, the time that profile control agent injects at least waits until that the first round injection of second step finishes to start again, and inject the corresponding round of chemical agent with well end and inject simultaneously, and injection profile agent is before first with discharge capacity 1-3.0m
3/ h, high pressure 4-5 MPa water filling form water channel, inject according to following order later:
The first round first slug, low pressure 1-2 MPa injects high sticky profile control agent slug;
The first round second slug, middle pressure 3-4 MPa injects sticky profile control agent slug;
The first round the 3rd slug, high pressure 4-5 MPa injected water slug;
Next carry out the injection profile agent of 2-3 round according to identical injection mode, oil well end selects profile control agent slug concentration to be greater than the chemical agent slug concentration that well end is corresponding, and slug amount is all less than well end with wheel number of times;
Oil well injects and finishes, and high pressure 4-5 MPa water filling is for squeezing; Oil well wouldn't drive a well, diffusion pressure 3-7 days, and Pressure Drop is extremely higher than opening well and making production after pressure 1MPa before measure;
The 4th step: the follow-up many rounds of mobility three slug that wait of well continue to inject, identical with the mode of the slug injecting early stage and injection.
Principle:
Chemical agent injects the displacement of reservoir oil from the many rounds of the mobilities such as well end three slug, and profile control agent is injected into the high moisture height of corresponding well from many rounds of mobility three slug such as oil well ends and oozes passage.In the process that two injecting slugs move closer to and dock at earth formation deep, the height of two injectings, in and water in height infiltration territory in the middle of low concentration slug and two injectings dissolve each other, be hypotonic district during high-efficient oil-displacing agent is squeezed in conjunction with being converted into the 3rd dose, hypotonic low wet crude raising swept volume and the oil displacement efficiency be with in displacement; Finish until oil well injects, chemical agent continues to inject from well, and profile control agent is reverse flow oil return well under the driving of chemical agent power.Chemical agent, profile control agent and the 3rd dose, jointly as main body injecting, drive the high, medium and low oil that oozes district to flow out to oil well from low oil impregnate district, improve displacement of reservoir oil swept volume and oil displacement efficiency.
Beneficial effect of the present invention:
1, mobility injection profile injecting total amount and the operating expenses such as minimizing, realize profile control, the displacement of reservoir oil and synergy simultaneously.Because the generation of the 3rd dose has increased effective injecting amount relatively; Can relatively reduce oil-water well total injection to certain well layer.And owing to injecting respectively from oil well and well two ends and the generation of the 3rd dose, saved injection length, reduce total injection;
2, the profile control agent injecting from oil well finally finishes with low concentration slug and water in hot pursuit, injection finishes the second slug reverse flow of rear oil well end injection to well wellbore, near pit shaft to the slug order in oil reservoir deep be low, neutralize highly, all is water in hot pursuit or low concentration slug by pit shaft.Be conducive to improve oil well liquid-producing ability and profile control effect, extend the expiration date and nearly well less permeable layer is effectively employed;
3, from mobility slugs such as well injections to oil well end, injecting Mud Property is serious, large, the consuming time length of consumed energy.Inject the sticky loss rate of injecting and energy loss at the mobility profile control such as oil well low more than injecting from well.There is the high passage mobility control water that oozes of better reduction, low-permeability layer liquid-producing capacity in simultaneously improving, effective utilization and the oil displacement efficiency of raising injecting, reduce injecting total amount and injection length and injection expense, totally realizes the collaborative oil that increases of system effect benefit and save money;
4, the mobility profile control specific aim such as oil well is stronger, the mobility such as well injects can be to regulating section of oil wells around, but can not look after the individual character of each oil well, and the mobility profile controls such as oil well can be in conjunction with the actual characteristic design scheme of concrete oil well, specific aim is stronger, whole structure is better, and period of validity is longer.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated:
Describe as an example of well Y63, the oil well Y45 in 2-6 oil field, the east area of the Liao River, coextensive with eastern and southern Liaoning Province example:
The first step: injected water is got through the passage between oil-water well, injects 0.1pv;
Second step: inject chemical agent from the many rounds of the mobilities such as Y63 well end three slug, it is the slug host described in " the synchronous flooding method of patent non-homogeneous pay multi-block equal-fluidity energy-gathering parallel (200610058762.2) " that chemical agent used adopts denomination of invention.Method for implanting is too with reference to method described in this patent of invention.
1. the first round is injected first, second and third slug, and concrete injection parameter is in table 1;
2. second take turns first, second and third slug of injection, concrete injection parameter is in table 1;
2. third round is injected first, second and third slug, and concrete injection parameter is in table 1;
First, second and third takes turns three slug chemical agent injection tables table 1 Y63 well
| Slug number | The high sticky injecting of the first slug | Sticky injecting in the second slug | The low sticky injecting of the second slug |
| Concentration PPm | 1200 | 900 | 700 |
| Viscosity mPa.s | 70 | 30 | 15 |
| Injection pressure MPa | 1-3 | 3-4 | 4-5 |
| Injection length d | 30 | 90 | 250 |
| Day real note m 3 | 27 | 46 | 67 |
| Slug amount m 3 | 810 | 4050 | 16750 |
The 3rd step: from mobility three many rounds of slug injection profile agent such as Y45 oil well ends, injection profile agent and Y63 well second are taken turns injection and synchronizeed and carry out, and concrete steps are as follows:
1. first with discharge capacity 3.0 m
3/ h, high pressure 4-5 MPa inject clear water slug 300 m
3;
2. the first round first slug: low pressure 1-2 MPa, injects high concentration 2500mg/L profile control agent 300 m
3;
The first round second slug: middle pressure 3-4 MPa injects low concentration 1500mg/L profile control agent 300 m3;
The first round the 3rd slug: high pressure 4-5 MPa, injects clear water slug 300 m3;
3. second take turns the first slug: low pressure 1-2 MPa, note people high concentration slug 2500mg/L profile control agent 300 m3;
Second takes turns the second slug: middle pressure 3-4 MPa injects low concentration 1500mg/L profile control agent 300 m
3;
Second takes turns the 3rd slug: high pressure 4-5 MPa injects clear water slug 300 m
3;
After profile control has been constructed, oil well wouldn't drive a well, diffusion pressure 7 days, and Pressure Drop is extremely higher than pressure 1MPa opening well and making production before measure.
The 4th step: the follow-up mobility slug that waits of well continues to inject, and oil well slug is reverse flow under well chemical agent drives.
The mobility profile control measure effects such as Y45 oil well are analyzed
1) this technology oil-water well adopts chemical pouring agent of the same race to inject respectively from oil well, well with different concentration, slug length, realize the mobility injection profiles such as oil-water well integrated, function meets shutoff high permeability formation advantage passage completely, the requirement in the hypotonic low aquifer of displacement, profile control technology has been implemented smoothly;
2) after the mobility profile control such as Y45 oil well, Y45 oil well increases oil and falls liquid successful, and month production fluid is from 300 m
3be reduced to 120m
3, reduce by 180 m
3, reduced by 60%; The moon, produce oil was from 1.5 m
3/ d brings up to 3.0m
3/ d, month oily 1.5 m of increasing
3/ d, and steadily increasing, moisture drop to from 99.6% 78% more stable.Producing fluid level is reduced to 447m from 340 m, and submergence is reduced to 14 m from 121 m.
In sum, above embodiment is only better exemplifying embodiment of the present invention, not in order to limit the present invention; All other do not depart from equivalence of the present invention to be modified or displacement, all should be contained in the scope of the invention.
Claims (1)
1. wait the mobility displacement of reservoir oil and a profile control integrated technique, the concrete steps of this technology are as follows:
The first step: injected water is got through the passage between oil-water well;
Second step: inject chemical agent from the many rounds of the mobilities such as well end three slug, wherein:
The first round first slug, low pressure 1-2 MPa injects high sticky chemical agent;
The first round second slug, middle pressure 3-4 MPa injects sticky chemical agent;
The first round the 3rd slug, high pressure 4-5 MPa injects low sticky chemical agent;
According to mobility three slugs such as identical injection mode inject second and third,---, n takes turns chemical agent;
The 3rd step: from mobility three many rounds of slug injection profile agent such as oil well ends, this profile control agent and the chemical agent injecting from the many rounds of the mobilities such as well end three slug described in back are identical material, the time that profile control agent injects at least waits until that the first round injection of second step finishes to start again, and inject the corresponding round of chemical agent with well end and inject simultaneously, and injection profile agent is before first with discharge capacity 1-3.0m
3/ h, high pressure 4-5 MPa water filling form water channel, inject according to following order later:
The first round first slug, low pressure 1-2 MPa injects high sticky profile control agent slug;
The first round second slug, middle pressure 3-4 MPa injects sticky profile control agent slug;
The first round the 3rd slug, high pressure 4-5 MPa injected water slug;
Next carry out the injection profile agent of 2-3 round according to identical injection mode, oil well end selects profile control agent slug concentration to be greater than the chemical agent slug concentration that well end is corresponding, and slug amount is all less than well end with wheel number of times;
Oil well injects and finishes, and high pressure 4-5 MPa water filling is for squeezing; Oil well wouldn't drive a well, diffusion pressure 3-7 days, and Pressure Drop is extremely higher than opening well and making production after pressure 1MPa before measure;
The 4th step: the follow-up many rounds of mobility three slug that wait of well continue to inject, identical with the mode of the slug injecting early stage and injection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410118513.2A CN104060974B (en) | 2014-03-27 | 2014-03-27 | Deng the mobility displacement of reservoir oil and profile control integrated technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410118513.2A CN104060974B (en) | 2014-03-27 | 2014-03-27 | Deng the mobility displacement of reservoir oil and profile control integrated technique |
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| CN104060974A true CN104060974A (en) | 2014-09-24 |
| CN104060974B CN104060974B (en) | 2016-08-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317412A (en) * | 2015-09-29 | 2016-02-10 | 大庆华澳盛丰油田技术服务有限公司 | Low-permeability oilfield energy-gathering equi-fluidity oil displacement method |
| CN107218020A (en) * | 2017-08-06 | 2017-09-29 | 大庆东油睿佳石油科技有限公司 | A kind of double slug type profile control agents of poly- table of hypertonic sandstone oil reservoir and its application method |
| CN107218009A (en) * | 2017-08-06 | 2017-09-29 | 大庆东油睿佳石油科技有限公司 | A kind of low-permeability sandstone oil reservoir chromium aluminium ion compounding profile control agent and its application method |
| CN110259410A (en) * | 2019-06-28 | 2019-09-20 | 山东德仕石油装备有限公司 | A kind of method that high-water-cut oil-producing well fixed tubular column realizes water blockoff |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107218020A (en) * | 2017-08-06 | 2017-09-29 | 大庆东油睿佳石油科技有限公司 | A kind of double slug type profile control agents of poly- table of hypertonic sandstone oil reservoir and its application method |
| CN107218009A (en) * | 2017-08-06 | 2017-09-29 | 大庆东油睿佳石油科技有限公司 | A kind of low-permeability sandstone oil reservoir chromium aluminium ion compounding profile control agent and its application method |
| CN110259410A (en) * | 2019-06-28 | 2019-09-20 | 山东德仕石油装备有限公司 | A kind of method that high-water-cut oil-producing well fixed tubular column realizes water blockoff |
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