CN109653717A - Combination, which is handled up, after individual well steam stimulation wells selects well decision-making technique - Google Patents
Combination, which is handled up, after individual well steam stimulation wells selects well decision-making technique Download PDFInfo
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- CN109653717A CN109653717A CN201910066868.4A CN201910066868A CN109653717A CN 109653717 A CN109653717 A CN 109653717A CN 201910066868 A CN201910066868 A CN 201910066868A CN 109653717 A CN109653717 A CN 109653717A
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- well
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- channeling
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Mining
Abstract
The present invention, which provides combination after a kind of individual well steam stimulation wells and handles up, selects well decision-making technique, comprising: seeks the research each well channeling channel strips number in area and studies the ratio of total channeling channel strips number in area, obtains zero dimension channeling port numbern c；Vapour floods the ratio of the derrick design range before area and channeling when seeking the research each well individual well steam soak in area, obtains zero dimension vapour and floods areaR h；Determine effective pay thickiness and formation thickness in the research each well control range in area by meticulous pool description, calculate its ratio, obtain it is net always thanh t；Each well group conjunction in calculating research area, which is handled up, selects well decision-making index Adi, and according to AdiSize is ranked up the research each well in area；It preferably satisfies research block injection boiler and pipe network moves towards constraint condition, and the maximum combination of the sum of well index is selected in combination.This method reduces individual well steam stimulation wells area and implements to combine to handle up to select the blindness of well, keeps the result of decision more scientific and reasonable, handles up for mining site implementation combined steam and provide solid theoretical direction.
Description
Technical field
The present invention relates to heavy crude reservoir Simulation on whole pay zones research field, after especially relating to a kind of individual well steam stimulation wells
Combination, which is handled up, selects well decision-making technique.
Background technique
Combined steam is handled up by combining several adjacent wells, is carried out concentrating orderly steam injection, stewing well, be recovered the oil, can be effective
Unevenness is employed in channeling, improvement between control well, is the effective technology for improving recovery ratio after heavy crude reservoir multi-round is handled up.At present
A large amount of machanism research has been carried out to the combined steam technology of handling up both at home and abroad and mining site is practiced, but has handled up combination and selects well
Method did not carried out systematic research also, and mining site implement combined steam handle up technology when, be only simply by adjacent channeling well group
It is combined, lacks the foundation of science, subjectivity, blindness are stronger in operation.We have invented a kind of new individual well steamings thus
Vapour combination after channeling of handling up handles up and selects well decision-making technique, solves the above technical problem.
Summary of the invention
Gradually implement combined steam to heavy crude reservoir science the object of the present invention is to provide a kind of realization to handle up, thus effectively
Channeling between control well employs combination after the individual well steam stimulation wells of unbalanced problem and handles up and selects well decision-making technique.
The purpose of the present invention can be achieved by the following technical measures: combination, which is handled up, after individual well steam stimulation wells selects well to determine
Plan method, combination is handled up after the individual well steam stimulation wells select the Jing Juecefangfabao individual well steam stimulation wells after combine and handle up
Selecting well decision-making technique includes: step 1, seeks the ratio of total channeling channel strips number in each well channeling channel strips number in research area and research area
Value, obtains zero dimension channeling port number nc；Step 2, before vapour floods area and channeling when seeking the research each well individual well steam soak in area
The ratio of the derrick design range obtains zero dimension vapour and floods area Rh；Step 3, the research each well in area is determined by meticulous pool description
Effective pay thickiness and formation thickness in control range, calculate its ratio, obtain net always than ht；Step 4, it is each to calculate research area
Well group conjunction, which is handled up, selects well decision-making index Adi, and according to AdiSize is ranked up the research each well in area；Step 5, research is preferably satisfied
Block injection boiler and pipe network move towards constraint condition, and the maximum combination of the sum of well index is selected in combination.
The purpose of the present invention can be also achieved by the following technical measures:
In step 1, when well steam injection each by study on monitoring area adjacent producing well wellhead temperature, Liquid output, oil production with
And aqueous situation of change, judge whether the well and each adjacent producing well generate channeling, there are direct fluid-channeling channels between the well
Well number be the well channeling channel strips number.
In step 1, the standard for determining to generate direct channeling when each well steam injection with adjacent producing well is to monitor adjacent life
Producing well has one of following performance: performance one, and oil production increases in production process, and wellhead temperature rises；Performance two, in production process
Liquid output rises, and moisture content increases, and wellhead temperature rises；Performance three, when adjacent well steam injection, producing well water yield is steeply risen,
For even moisture content close to 100%, well head has steam flash phenomenon.
In step 2, it according to channeling mathematical model between well when channeling physical model establishes individual well steam soak between well, calculates
Vapour floods area S when the research each well individual well steam soak in areasf:
Then zero dimension vapour floods area
Wherein, Lk- well spacing, m；r(ti)-heating radius, m.
In step 4, the heated perimeter the big, selects well decision weights smaller；Longitudinal direction can development degree it is more big, select well decision
Weight is bigger, and the channeling port number the big at present, selects well decision weights bigger；According to the above principle, building combination, which is handled up, selects well to determine
Plan Index Adi:
In steps of 5, the two well groups conjunction for listing all adaptation mining site boilers and pipe network actual conditions is handled up and the conjunction of three well groups
Handle up alternative, further preferably meet the research block injection boiler and pipe network moves towards constraint condition, and combination select well index it
With maximum combination.
In steps of 5, according to mining site boiler and pipe network actual conditions, selection two well groups conjunction is handled up or the conjunction of three well groups is handled up,
If selection two well groups conjunction is handled up, there must be direct channeling channel between two wells, and the more big alternative journey of the sum of well index is selected in combination
It spends higher；If selection three well groups conjunction is handled up, first according to selecting well, remaining Liang Koujing and center centered on the biggish well of well index
There must be direct fluid-channeling channel between well, and combination selects the more big alternative degree of the sum of well index higher.
Combination, which is handled up, after individual well steam stimulation wells in the present invention selects well decision-making technique, by expanding production derrick design
The factor of range is studied, and is established and is selected well decision-making index when combination is handled up under more Dominated Factors, realizes and gulp down to needs combination
It spits the oil well in region and carries out orderly gradually combination production.Compared with the combination well choosing method that mining site was applied in the past, the present invention is mentioned
What is supplied selects well decision-making technique to be intimately associated reservoir condition and production reality, overcomes subjectivity, science is remarkably reinforced, and preferably solves
What combined steam of having determined was handled up selects well problem, handles up for mining site implementation combined steam and provides solid theoretical direction.
Detailed description of the invention
Fig. 1 handles up for combination after individual well steam stimulation wells of the invention selects the stream of a specific embodiment of well decision-making technique
Cheng Tu；
Fig. 2 is certain research area's channeling direction schematic diagram in a specific embodiment of the invention；
It is channeling simplifies physical model between well schematic diagram that Fig. 3, which is in a specific embodiment of the invention,；
Fig. 4 is that certain research district's groups closes decision-making index mark figure of handling up in a specific embodiment of the invention.
Specific embodiment
To enable above and other objects, features and advantages of the invention to be clearer and more comprehensible, preferably implementation is cited below particularly out
Example, and cooperate shown in attached drawing, it is described in detail below.
Desk research shows that heating radius is bigger at present, and oil reservoir heating surface area is bigger, employ it is more balanced, then combination handle up
Yield increasing effect is smaller afterwards；Core intersection is bigger, and longitudinal steam overlap is more serious, and the potentiality that steam injection longitudinally turns to are bigger, then group
Yield increasing effect is bigger after conjunction is handled up；Channeling port number is more at present, and bigger, then volume increase effect after combination is handled up is lost caused by channeling
Ying Yue great.For the influence for eliminating research area's entirety oil reservoir and exploit condition, yield increasing effect after combination is handled up is influenced on three above
Dominated Factors carried out zero dimension, on this basis, building combination handles up and selects well decision-making index.According to each well decision-making index
Size is combined to handle up and selects well in combination with mining site boiler and pipe network actual conditions.
It handles up as shown in FIG. 1, FIG. 1 is combination after individual well steam stimulation wells of the invention and selects the process of well decision-making technique
Figure.
In a step 101, adjacent producing well wellhead temperature, Liquid output, oil production when well steam injection each by study on monitoring area
And aqueous situation of change, judge whether the well and each adjacent producing well generate channeling, it is logical that there are direct channelling between the well
The well number in road is the well channeling channel strips number.Determine to generate the standard of direct channeling with adjacent producing well when each well steam injection as prison
Measuring adjacent producing well has one of following performance: performance one, and oil production increases in production process, and wellhead temperature rises；Performance two,
Liquid output rises in production process, and moisture content increases, and wellhead temperature rises；Performance three, when adjacent well steam injection, producing well water yield
It steeply rises or even moisture content is close to 100%, well head has steam flash phenomenon.
Step 102, vapour floods the ratio of the derrick design range before area and channeling when seeking the research each well individual well steam soak in area
Value, obtains zero dimension vapour and floods area Rh；
According to channeling mathematical model between well when channeling physical model establishes individual well steam soak between well, the research each well in area is calculated
Vapour floods area S when individual well steam soaksf:
Then zero dimension vapour floods area
Wherein, Lk- well spacing, m；r(ti)-heating radius (can be calculated) with Marx-Langenheim formula, m.
Step 103, effective pay thickiness and the stratum in the research each well control range in area are determined by meticulous pool description
Thickness calculates its ratio, obtains net always than ht；
Step 104, each well group conjunction in calculating research area, which is handled up, selects well decision-making index Adi, and according to AdiSize is each to research area
Well is ranked up；
Since yield increasing effect depends on oil reservoir by heat rating and crude oil heat intensity (viscosity reduction degree) after oil reservoir is heated,
Therefore it is all be conducive to increase all will be generated positive influence to effect of increasing production is improved by the measure of heat rating.Obviously model is heated at present
It encloses more big, selects well decision weights smaller；Longitudinal direction can development degree it is more big, select well decision weights bigger, at present channeling port number
It is more big, select well decision weights bigger.According to the above principle, building combination, which is handled up, selects well decision-making index Adi:
Step 105, list it is all adaptation mining site boilers and pipe network actual conditions two well groups conjunction handle up with three well groups conjunction gulp down
Alternative is spat, further preferably meets the research block injection boiler and pipe network moves towards constraint condition, and the sum of well index is selected in combination
Maximum combination.According to mining site boiler and pipe network actual conditions, general two well group of more options conjunction is handled up or the conjunction of three well groups is handled up, if
It selects the conjunction of two well groups to handle up, there must be direct channeling channel between two wells, and the more big alternative degree of the sum of well index is selected in combination
It is higher；If selection three well groups conjunction is handled up, first according to selecting well, remaining two mouthfuls of well and centerwell centered on the biggish well of well index
Between there must be direct fluid-channeling channel, and combination selects the more big alternative degree of the sum of well index higher.
In an application specific embodiment of the invention, comprising the following steps:
Step 1, adjacent production wellhead temperature, Liquid output, oil production and aqueous variation when each well steam injection in study on monitoring area,
Judge whether the well and each adjacent producing well directly generate channeling, determines that total channeling is logical in the well channeling channel strips number and research area
Road item number, calculates its ratio, obtains zero dimension channeling port number nc；
Table 1 is certain research area's channeling situation statistical form in a specific embodiment of the invention, according to monitoring result pair in table
The research each well channeling situation in area has carried out statistics and analysis.
The 1 list wellblock 56-13-XN5 channeling situation statistical form of table
Fig. 2 is certain research area's channeling direction schematic diagram in a specific embodiment of the invention, according to monitoring result pair in figure
Channeling direction is marked between the research each well in area.According to each channeling well channeling channel strips number in figure statistical research area and research area
Interior total channeling channel strips number, calculates its ratio, and each channeling well zero dimension channeling port number nc can be obtained.
In step 2, according to visual virtual design as a result, in individual well steam soak steam injection process, the channeling that is formed between well
Channel (vapour floods range) presents a wedge-type shape.The shape can be considered with the heated perimeter and channeling well before steam injection well channeling
Tangent line is formed by region.When channeling not occurring, it is r (t that radius, which is presented, in the heated perimeter of steam-stimulated welli) circular area；
Between generation well after channeling, formation is by 2 bottoms between steam injection well and offset well wellA height of r (ti) right angle trigonometry group
At wedge-shaped vapour flood range, area SsfCalculation formula are as follows:
Then zero dimension vapour floods area
Wherein, Lk- well spacing, m；r(ti)-heating radius (can be calculated) with Marx-Langenheim formula, m.
Fig. 3 is that channeling simplifies physical model between well in a specific embodiment of the invention.
In step 3, effective pay thickiness and stratum in the research each well control range in area are determined by meticulous pool description
Thickness calculates its ratio, obtains net always than ht.
Table 2 is certain research area's channeling parameter computational chart in a specific embodiment of the invention, is provided using step 1~3
Research area's correlation channeling parameter can be calculated in method.
The 2 list wellblock 56-13-XN5 channeling parameter computational chart of table
In step 4, since the heated rear yield increasing effect of oil reservoir depends on oil reservoir by heat rating and crude oil heat intensity (viscosity drop
Low degree), thus it is all be conducive to increase all will be generated positive influence to effect of increasing production is improved by the measure of heat rating.Obviously,
Heating radius is bigger at present, and oil reservoir heating surface area is bigger, employ it is more balanced, then combination handle up after yield increasing effect it is smaller；Oil reservoir is thick
Degree is bigger, and longitudinal steam overlap is more serious, and the potentiality that steam injection longitudinally turns to are bigger, then yield increasing effect is bigger after combination is handled up；
Channeling port number is more at present, lost caused by channeling it is bigger, then combination handle up after yield increasing effect it is bigger.It is whole to eliminate research area
The influence of body oil reservoir and exploit condition, the Dominated Factors for influencing yield increasing effect after combination is handled up to three above have carried out zero dimension
Change, on this basis, building combination, which is handled up, selects well decision-making index Adi:
Each well group conjunction in calculating research area, which is handled up, selects well decision-making index Adi, and is carried out according to Ad i size to each well in research area
Sequence, and make the research district's groups and close decision-making index mark figure of handling up.Table 3 is certain research area in a specific embodiment of the invention
Decision-making index sequencing table of handling up is combined, Ad i is bigger, then selects well priority higher when combining.
Combine decision-making index sequencing table of handling up in the 3 list wellblock 56-13-XN5 of table
Fig. 4 is that certain research district's groups closes decision-making index mark figure of handling up in a specific embodiment of the invention.Process enters step
Rapid 5.
In step 5, well decision-making index ranking results are selected according to the research each well in area, list all adaptation mining site boilers and pipe
The two well groups conjunction of net actual conditions is handled up handles up alternative with the conjunction of three well groups, further preferably meet the research block injection boiler and
Pipe network moves towards constraint condition, and the maximum combination of the sum of well index is selected in combination.Table 4 is that certain in a specific embodiment of the invention is ground
Study carefully district's groups and close alternative table of handling up, the two well groups conjunction that all adaptation mining site boilers and pipe network actual conditions are listed in table is handled up
Alternative of handling up is closed with three well groups.
Combine alternative table of handling up in the 4 list wellblock 56-13-XN5 of table
If selection two well groups conjunction is handled up, there must be direct channeling channel between two wells, and combination selects the sum of well index more
Big alternative degree is higher；If selection three well groups conjunction is handled up, first according to selecting well centered on the biggish well of well index, remaining two mouthfuls
There must be direct fluid-channeling channel between well and centerwell, and combination selects the more big alternative degree of the sum of well index higher；Finally need
It moves towards to determine optimal combination in conjunction with specific research block injection boiler and pipe network.Process terminates.
Embodiment enumerated above is not to technical solution described in the invention only for understanding that the present invention is used
Restriction, the those of ordinary skill in relation to field on the basis of the technical solution described in claim, can also make a variety of changes
Change or deformation, all equivalent variations or deformation should all be covered within the scope of the claims of the present invention.The present invention is not
Place is described in detail, is the well-known technique of those skilled in the art of the present technique.
Claims (7)
1. combination, which is handled up, after individual well steam stimulation wells selects well decision-making technique, which is characterized in that after the individual well steam stimulation wells
Combination, which is handled up, selects the well decision-making technique to include:
Step 1, it seeks the research each well channeling channel strips number in area and studies the ratio of total channeling channel strips number in area, obtain zero dimension
Channeling port number nc；
Step 2, vapour floods the ratio of the derrick design range before area and channeling when seeking the research each well individual well steam soak in area, obtains
Zero dimension vapour floods area Rh；
Step 3, effective pay thickiness and formation thickness in the research each well control range in area, meter are determined by meticulous pool description
Its ratio is calculated, is obtained net always than ht；
Step 4, each well group conjunction in calculating research area, which is handled up, selects well decision-making index Adi, and according to AdiSize arranges the research each well in area
Sequence；
Step 5, it preferably satisfies research block injection boiler and pipe network moves towards constraint condition, and combination selects the sum of well index maximum
Combine alternative of handling up.
2. combination, which is handled up, after individual well steam stimulation wells according to claim 1 selects well decision-making technique, which is characterized in that
In step 1, when well steam injection each by study on monitoring area adjacent producing well wellhead temperature, Liquid output, oil production and aqueous variation
Situation, judges whether the well and each adjacent producing well generate channeling, and the well number between the well there are direct fluid-channeling channel is
The well channeling channel strips number.
3. combination, which is handled up, after individual well steam stimulation wells according to claim 2 selects well decision-making technique, which is characterized in that
In step 1, determine that the standard for generating direct channeling when each well steam injection with adjacent producing well is following to monitor that adjacent producing well has
One of performance: showing one, and oil production increases in production process, and wellhead temperature rises；Show two, in production process on Liquid output
It rises, moisture content increases, and wellhead temperature rises；Performance three, when adjacent well steam injection, producing well water yield is steeply risen or even aqueous
For rate close to 100%, well head has steam flash phenomenon.
4. combination, which is handled up, after individual well steam stimulation wells according to claim 1 selects well decision-making technique, which is characterized in that
In step 2, according to channeling mathematical model between well when channeling physical model establishes individual well steam soak between well, the research each well in area is calculated
Vapour floods area S when individual well steam soaksf:
Then zero dimension vapour floods area
Wherein, Lk- well spacing, m；r(ti)-heating radius, m.
5. combination, which is handled up, after individual well steam stimulation wells according to claim 1 selects well decision-making technique, which is characterized in that
In step 4, the heated perimeter the big, selects well decision weights smaller；Longitudinal direction can development degree it is more big, select well decision weights bigger,
The channeling port number the big at present, selects well decision weights bigger；According to the above principle, building combination, which is handled up, selects well decision-making index Adi:
6. combination, which is handled up, after individual well steam stimulation wells according to claim 1 selects well decision-making technique, which is characterized in that
In step 5, the two well groups conjunction for listing all adaptation mining site boilers and pipe network actual conditions is handled up handles up alternative side with the conjunction of three well groups
Case, further preferably meets the research block injection boiler and pipe network moves towards constraint condition, and combination selects maximum group of the sum of well index
It closes.
7. combination, which is handled up, after individual well steam stimulation wells according to claim 6 selects well decision-making technique, which is characterized in that
In step 5, according to mining site boiler and pipe network actual conditions, selection two well groups conjunction is handled up or the conjunction of three well groups is handled up, if two wells of selection
Combination is handled up, and there must be direct channeling channel between two wells, and combination selects the more big alternative degree of the sum of well index higher；If choosing
It selects the conjunction of three well groups to handle up, first according to well centered on the biggish well of well index is selected, remaining two mouthfuls necessary between well and centerwell
There are direct fluid-channeling channels, and combination selects the more big alternative degree of the sum of well index higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066868.4A CN109653717B (en) | 2019-01-23 | 2019-01-23 | Single-well steam huff-puff and puff steam flee post-combination huff-puff well selection decision method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066868.4A CN109653717B (en) | 2019-01-23 | 2019-01-23 | Single-well steam huff-puff and puff steam flee post-combination huff-puff well selection decision method |
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| CN109653717A true CN109653717A (en) | 2019-04-19 |
| CN109653717B CN109653717B (en) | 2021-02-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112081568A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | Thermal recovery heavy oil combined huff-puff well selection decision method |
| CN113914837A (en) * | 2020-07-07 | 2022-01-11 | 中国石油天然气股份有限公司 | Method for measuring steam channeling degree between steam huff and puff wells |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112081568A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | Thermal recovery heavy oil combined huff-puff well selection decision method |
| CN112081568B (en) * | 2019-06-12 | 2022-12-02 | 中国石油化工股份有限公司 | Thermal recovery heavy oil combined huff-puff well selection decision method |
| CN113914837A (en) * | 2020-07-07 | 2022-01-11 | 中国石油天然气股份有限公司 | Method for measuring steam channeling degree between steam huff and puff wells |
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| Publication number | Publication date |
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| CN109653717B (en) | 2021-02-23 |
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