CN110513089A - A kind of Offshore Heavy Oil Field thermal recovery, which is handled up, develops production capacity multiple and determines method - Google Patents
A kind of Offshore Heavy Oil Field thermal recovery, which is handled up, develops production capacity multiple and determines method Download PDFInfo
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- CN110513089A CN110513089A CN201910840575.7A CN201910840575A CN110513089A CN 110513089 A CN110513089 A CN 110513089A CN 201910840575 A CN201910840575 A CN 201910840575A CN 110513089 A CN110513089 A CN 110513089A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000000295 fuel oil Substances 0.000 title claims abstract description 20
- 238000011084 recovery Methods 0.000 title claims abstract description 17
- 239000003921 oil Substances 0.000 claims abstract description 53
- 238000013461 design Methods 0.000 claims abstract description 42
- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 238000011161 development Methods 0.000 claims abstract description 20
- 238000004364 calculation method Methods 0.000 claims abstract description 18
- 238000000605 extraction Methods 0.000 claims abstract description 5
- 238000012512 characterization method Methods 0.000 claims abstract description 3
- 238000012360 testing method Methods 0.000 claims description 20
- 230000035699 permeability Effects 0.000 claims description 15
- 238000004088 simulation Methods 0.000 claims description 13
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 238000013401 experimental design Methods 0.000 claims 1
- 230000006978 adaptation Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000010793 Steam injection (oil industry) Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 208000035126 Facies Diseases 0.000 description 1
- 241001045988 Neogene Species 0.000 description 1
- 238000010795 Steam Flooding Methods 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000001965 increasing effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 101150091879 neo gene Proteins 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Life Sciences & Earth Sciences (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics And Detection Of Objects (AREA)
- Earth Drilling (AREA)
Abstract
It handles up the present invention relates to a kind of Offshore Heavy Oil Field thermal recovery and develops production capacity multiple and determine method, step: define steam soak initial stage of development production capacity multiple；Choose design variable；Steam soak initial productivity multiple and geological reservoir parameter are analyzed, and influences steam quality, the quantitative mathematical relationship of injection intensity parameter of steam heat；Choose the initial value range of five design variables；Sample point is chosen for design variable；The 1st annual yield multiple corresponding to each sample point is obtained, and then obtains steam soak initial productivity fold values；Using quantitative mathematical relationship, using multiple regression procedure, the multifactor calculation formula of the building characterization offshore viscous oil field steam soak initial stage of development production capacity multiple of production capacity multiple corresponding to the affecting parameters and each sample point using each sample point；The precision of the multifactor calculation formula of initial productivity multiple is verified；Calculation formula verifying is carried out to steam soak initial productivity multiple using heavy crude heat extraction actual production data, completes the determination of Offshore Heavy Oil Field steam soak initial productivity multiple.
Description
Technical field
The present invention relates to the field of heavy oil thermal recovery in a kind of petroleum-type resource, gulp down especially with regard to a kind of Offshore Heavy Oil Field thermal recovery
It spits exploitation production capacity multiple and determines method.
Background technique
Currently, heavy oil stock number is big, special heavy oil cold flow production exploitation production capacity is low, recovery ratio is low, need to carry out Simulation on whole pay zones.
Onshore oil field generally uses steam soak for the oil reservoir other than I class of common heavy oil, initial stage, with the increase for round of handling up,
The reduction of layer energy and oil well output, later period of handling up are changed into the development technique such as steam drive, fireflood in due course.
The heat content and volumetric heat capacity carried due to steam is high, and heat extraction by steam injection exploitation is land viscous crude field effective exploitation hand
Section, achieves preferable development effectiveness and economic benefit, has obtained large-scale application.Though offshore oilfield since 2008,
Carry out multielement hot fluid in the oil field N and the oil field L to handle up and steam soak pilot test, oil increasing effect is obvious, but thermal recovery small scale.
Meanwhile the oil field N multielement hot fluid is handled up test, since injection flue gas tolerance is larger in test, more gas well gas has occurred at present and have altered,
Influence more round throughput predictions.It is leading Simulation on whole pay zones technology that offshore oilfield, which has been gradually formed with steam injection development,.
Currently used technical solution first determines conventional initial stage of development yield by conventional cold reconnaissance examination, on this basis,
Consider 2 times of yield multiple, determine that high-quality steam is handled up initial production, considers that other factors influence the shadow to yield multiple
It rings, yield multiple value is single, causes error larger.
Summary of the invention
In view of the above-mentioned problems, handling up the object of the present invention is to provide a kind of Offshore Heavy Oil Field thermal recovery develops production capacity multiple determination side
Method, strong operability, accuracy are high, and Offshore Heavy Oil Field steam soak can effectively be instructed to develop the thermal production well initial stage under different condition
With production.
To achieve the above object, the present invention takes following technical scheme: a kind of Offshore Heavy Oil Field thermal recovery, which is handled up, develops production capacity times
Number determines method comprising following steps: 1) defining steam soak initial stage of development production capacity multiple；2) design variable is chosen；3) sharp
With numerical reservoir simulation method, steam soak initial stage of development production capacity multiple and geological reservoir parameter are analyzed, and influences steam heat
Steam quality, the quantitative mathematical relationship of injection intensity parameter of amount；4) the initial value range of design variable is chosen；5) it is directed to shadow
The design variable for ringing steam soak yield, sample point is chosen using test design method, and sample point is different designs variable
Combination；6) the offshore viscous oil field steam soak exploitation three-dimensional oil reservoir numerical simulator and conventional exploitation oil pre-established is utilized
It hides numerical simulator and numerical simulation calculation is carried out to the sample point of selection, obtain the production of the 1st annual corresponding to each sample point
Multiple is measured, and then obtains steam soak initial productivity fold values；7) steam soak production capacity multiple determined by step 3) is utilized
With core intersection, viscosity of crude, reservoir permeability, five influence factors of steam quality and injection intensity quantitative mathematical relationship,
Using multiple regression procedure, production capacity times corresponding to each sample point determined using the affecting parameters and its step 6) of each sample point
Number characterizes the multifactor calculation formula of offshore viscous oil field steam soak initial stage of development production capacity multiple to construct；8) to initial productivity
The precision of the multifactor calculation formula of multiple is verified, if meeting preset required precision, carries out step 9), if otherwise
It is unsatisfactory for, then returns to step 2)；9) multifactor calculating public affairs are carried out to initial productivity multiple using heavy crude heat extraction actual production data
Formula verifying, completes the determination of Offshore Heavy Oil Field steam soak initial productivity multiple.
Further, in the step 1), using numerical reservoir simulation method, determine that steam soak is developed the 1st annual and produced
The 1st annual yield of amount and conventional exploitation, the multiple of the two yield are defined as steam soak initial stage of development production capacity multiple.
Further, in the step 2), it is strong that core intersection, viscosity of crude, reservoir permeability, steam quality and injection are chosen
Degree is used as design variable.
Further, in the step 3), geological reservoir parameter includes core intersection, viscosity of crude and permeability.
Further, in the step 3), using multiple correlation coefficient index to steam soak production capacity multiple and influence factor
Quantitative mathematical relationship test, related coefficient is greater than 0.98 to meet the requirements.
Further, in the step 5), the test design method used is Orthogonal Experiment and Design, Central Composite design side
Method, Box-Behnken design method or Latin hypercube body design method.
Further, in the step 6), according to the geological reservoir feature of subject oil field, steam is established using existing simulator
It handles up three-dimensional oil reservoir numerical simulator.
Further, the foundation of the conventional exploitation three-dimensional oil reservoir numerical simulator should use and steam soak three-dimensional oil reservoir
The identical simulator of numerical simulator is established, and is guaranteed in addition to heat injection parameter, other model parameters are consistent.
Further, in the step 8), preset required precision is that related coefficient is greater than 0.98.
Further, in the step 9), verification method are as follows: if prediction error is less than 10%, multifactor calculation formula can
It leans on；If predicting, error is greater than 10%, corrects the steam soak exploitation three-dimensional oil reservoir numerical simulator pre-established.
The invention adopts the above technical scheme, which has the following advantages: the present invention it can be considered that reservoir geology parameter,
Such as core intersection, reservoir properties, fluid properties and heat injection parameter, such as steam quality, heat injection temperature and injection intensity because
Influence of the element to steam soak initial productivity multiple, strong operability of the present invention, accuracy are high, and Offshore Heavy Oil Field steam can be instructed to gulp down
The thermal production well initial stage under exploitation different condition is spat with production.
The present invention can be widely applied to the determination of offshore oilfield steam soak initial productivity multiple.
Specific embodiment
The invention belongs to petroleum-type resource especially viscous crude directions, and it is true to be related to offshore viscous oil field steam soak initial productivity
It is fixed, it is specially adapted to Offshore Heavy Oil Field Reservoir With Steam and handles up the determination of initial stage of development production capacity and conventional initial stage of development production capacity multiple.Under
Face is in conjunction with the embodiments described in detail the present invention.
The present invention, which provides a kind of Offshore Heavy Oil Field thermal recovery and handles up, to be developed production capacity multiple and determines method comprising following steps:
1) numerical reservoir simulation method is utilized, determines that steam soak develops the 1st annual yield and conventional exploitation the 1st year flat
Equal yield, the multiple of the two yield are defined as steam soak initial stage of development production capacity multiple.
2) design variable is chosen:
Core intersection, viscosity of crude, reservoir permeability, steam quality and injection intensity etc. five are chosen to produce steam soak
The parameter being affected is measured as design variable；
Design variable not only includes five listed parameters, should also include the oil reservoir of other influences steam soak yield
Matter and heat injection parameter etc..
3) numerical reservoir simulation method is utilized, analysis steam soak initial stage of development production capacity multiple and core intersection, crude oil are viscous
The quantitative mathematical of the parameters such as degree and the geological reservoirs parameter such as permeability, and the steam quality, the injection intensity that influence steam heat
Relationship；
It is examined using quantitative mathematical relationship of the multiple correlation coefficient index to steam soak production capacity multiple and influence factor
It tests, wherein related coefficient is greater than 0.9 to meet required precision.
4) the initial value range of five design variables is chosen；
For example, the initial value range of above-mentioned five design variables may respectively be: 10~50m of core intersection, viscosity of crude
500~4000mPas, 80~120m of 500~5000mD of reservoir permeability, steam quality 0.0~0.6 and injection intensity3/d/
m。
5) for the design variable for influencing steam soak yield, sample point, sample point are chosen using test design method
For the combination of different designs variable, enough information can be obtained in order to carry out less test；
Used test design method is Orthogonal Experiment and Design, central composite design method, the design side Box-Behnken
Method or one of Latin hypercube body design method and other test design methods.For example, using orthogonal experiment design method,
Table is designed using 5 factor, 5 horizontal quadrature, chooses L25 (56) orthogonal table, design 25 groups of samples.
6) it is opened using the offshore viscous oil field steam soak exploitation three-dimensional oil reservoir numerical simulator and routine that pre-establish
Hair oil hides numerical simulator and carries out numerical simulation calculation to the sample point of selection, obtains the 1st year corresponding to each sample point and puts down
Equal yield multiple, and then obtain steam soak initial productivity fold values；
Steam soak three-dimensional oil reservoir numerical simulator is established according to the geological reservoir feature of subject oil field, general using existing
There is simulator foundation, such as CMG-STARS, ECLIPSE-E300 simulator, the steam soak three-dimensional oil reservoir numerical simulation established
Model should embody the practical characteristics of reservoirs such as Reservoir Heterogeneity as far as possible, can represent practical reservoir model；
The foundation of conventional exploitation three-dimensional oil reservoir numerical simulator should use and above-mentioned steam soak three-dimensional oil reservoir Numerical-Mode
The identical simulator of analog model is established, and is guaranteed in addition to heat injection parameter, other model parameters are consistent.
7) steam soak production capacity multiple determined by step 3) and core intersection, viscosity of crude, reservoir permeability, steaming are utilized
The quantitative mathematical relationship of five influence factors such as vapour mass dryness fraction and injection intensity utilizes each sample point using multiple regression procedure
Production capacity multiple corresponding to each sample point that affecting parameters and its step 6) determine gulps down to construct characterization offshore viscous oil field steam
Spit the multifactor calculation formula of initial stage of development production capacity multiple.
8) precision of the multifactor calculation formula of initial productivity multiple is verified, is wanted if meeting preset precision
It asks, then carries out step 9), otherwise if not satisfied, then returning to step 2)；
Preset required precision is that related coefficient is greater than 0.98.
9) multifactor calculation formula verifying is carried out to initial productivity multiple using heavy crude heat extraction actual production data, completes sea
The determination of upper thickened oil steam-stimulated initial productivity multiple；
Verification method are as follows: if prediction error is less than 10%, multifactor calculation formula is reliable, can utilize this multifactor calculating
Formula calculates steam soak production capacity multiple under the conditions of different reservoir geologies and heat injection；If predicting, error is greater than 10%, and amendment is pre-
The steam soak exploitation three-dimensional oil reservoir numerical simulator first established.
Embodiment:
Using the Bohai Sea oil field J as prototype, establishes typical reservoir numerical simulation model and carry out steam soak thermal recovery initial productivity times
Number research.J oil field oil-containing series of strata are Neogene System Guantao group, and Oil Reservoir Types are mainly the bedded structure oil reservoir by construction control, oil
Buried depth -780.0~-970.0m is hidden, there are more set oil-water systems on longitudinal direction.Sedimentary facies is nearly source Braided-river Deltas, storage
Stacking is set in flakes, and medium deviation is sorted, and is relatively developed every interlayer.Crude oil density in stock tank 0.972t/m3, belong to I -2 class common heavy oil.
(1) initial productivity multiple quantitatively characterizing
Using orthogonal design method, analyze different core intersections, reservoir permeability, viscosity of crude and injection steam intensity and
It injects under mass dryness fraction Parameter Conditions, the size of steam soak initial productivity multiple.Table is designed using 5 factor, 5 horizontal quadrature, parameter takes
Value is as shown in table 1.
1 steam soak initial productivity multiple orthogonal design parameter of table
Choose L25 (56) orthogonal table, totally 25 groups of tests, orthogonal test calculated result is shown in Table 2.Orthogonal test variance
Analysis the result shows that, reservoir permeability, viscosity of crude and injection intensity on steam soak initial productivity multiple influence it is extremely significant, steam
Vapour mass dryness fraction influences significantly, and effective thickness influences not significant.
2 orthogonal test of multiple factors result table of table
Steam is established using multiple regression procedure according to steam soak initial productivity multiple and each influence factor relationship
It handles up the multifactor calculation formula of thermal recovery production capacity multiple:
+ 0.518 χ+0.00863q-1.005 of y=0.1936ln h-0.5455ln k+0.7828ln μ
Wherein, h is effective pay thickiness, 10~50m of adaptation range；K reservoir permeability, adaptation range 750~500010
-3μm2；μ is viscosity of crude, 500~4000mPas of adaptation range；χ is steam quality, adaptation range 0~0.6；Q is that injection is steamed
Vapour intensity, 80~160m of adaptation range3/d/m。
(2) initial productivity multiple is verified
The marine oil field L is the guiding thermal recovery experiment of Offshore Heavy Oil Field steam soak, and test objective layer is the town Paleogene System Ming Hua group
III oil reservoir group, reservoir lithology is loose, pores'growth, porosity average out to 34.4%, and permeability is averaged 3787 × 10-3μm2, ground
Oil density 0.984g/cm3, oil viscosity 2337mPas.Thermal recovery pilot test JingA1Jing is to guarantee steam injection safety
Construction requirement, scene are actually implanted into speed average out to 160m3/ d, is simulated according to software, and shaft bottom mass dryness fraction is about 0.1, calculates shaft bottom
Temperature is about 340 DEG C.From steam soak with it is cold adopt development effectiveness comparison from the point of view of, steam soak can significantly improve heavy oil development effect
Fruit, the daily output of the 1st monthly average reach cold 2.5~2.8 times for adopting well, and the 1st annual daily output and tired oil production are cold to adopt the 2.2 of well
Times, as shown in table 3.
3 oil field L steam-stimulated well oil production statistics table of table
According to steam thermal recovery production capacity multiple formula, in core intersection 10m, viscosity of crude 2337mPas, permeability 3787
×10-3μm2, under the conditions of shaft bottom mass dryness fraction 0.1, thermal recovery initial productivity multiple is 2.1, with practical production capacity power error less than 5%.Cause
This, research achievement can provide guidance and foundation with production for steam soak thermal production well under different condition.
The various embodiments described above are merely to illustrate the present invention, and each step may be changed, in the technology of the present invention
On the basis of scheme, the improvement and equivalents that all principles according to the present invention carry out separate step should not be excluded in this hair
Except bright protection scope.
Claims (10)
1. a kind of Offshore Heavy Oil Field thermal recovery handles up and develops production capacity multiple and determine method, it is characterised in that the following steps are included:
1) steam soak initial stage of development production capacity multiple is defined；
2) design variable is chosen；
3) numerical reservoir simulation method, analysis steam soak initial stage of development production capacity multiple and geological reservoir parameter, Yi Jiying are utilized
Ring steam quality, the quantitative mathematical relationship of injection intensity parameter of steam heat；
4) the initial value range of design variable is chosen；
5) for the design variable for influencing steam soak yield, sample point is chosen using test design method, sample point is not
With the combination of design variable；
6) the offshore viscous oil field steam soak exploitation three-dimensional oil reservoir numerical simulator and conventional exploitation oil pre-established is utilized
It hides numerical simulator and numerical simulation calculation is carried out to the sample point of selection, obtain the production of the 1st annual corresponding to each sample point
Multiple is measured, and then obtains steam soak initial productivity fold values；
7) dry using steam soak production capacity multiple determined by step 3) and core intersection, viscosity of crude, reservoir permeability, steam
The quantitative mathematical relationship of degree and five influence factors of injection intensity is joined using multiple regression procedure using the influence of each sample point
Production capacity multiple corresponding to each sample point that several and its step 6) determines is developed to construct characterization offshore viscous oil field steam soak
The multifactor calculation formula of initial productivity multiple；
8) precision of the multifactor calculation formula of initial productivity multiple is verified, if meeting preset required precision,
Step 9) is carried out, otherwise if not satisfied, then returning to step 2)；
9) multifactor calculation formula verifying is carried out to initial productivity multiple using heavy crude heat extraction actual production data, completed marine thick
Oil vapour is handled up the determination of initial productivity multiple.
2. determining method as described in claim 1, it is characterised in that: in the step 1), using numerical reservoir simulation method, really
Determine steam soak and develop the 1st annual yield of the 1st annual yield and conventional exploitation, the multiple of the two yield is defined as steam and gulps down
Spit initial stage of development production capacity multiple.
3. as described in claim 1 determine method, it is characterised in that: in the step 2), choose core intersection, viscosity of crude,
Reservoir permeability, steam quality and injection intensity are as design variable.
4. determining method as described in claim 1, it is characterised in that: in the step 3), geological reservoir parameter includes oil reservoir thickness
Degree, viscosity of crude and permeability.
5. determining method as described in claim 1 or 4, it is characterised in that: in the step 3), using multiple correlation coefficient index
It tests to the quantitative mathematical relationship of steam soak production capacity multiple and influence factor, related coefficient is greater than 0.98 to be wanted to meet
It asks.
6. determining method as described in claim 1, it is characterised in that: in the step 5), the test design method of use is positive
Hand over experimental design, central composite design method, Box-Behnken design method or Latin hypercube body design method.
7. determining method as described in claim 1, it is characterised in that: in the step 6), according to the geological reservoir of subject oil field
Feature establishes steam soak three-dimensional oil reservoir numerical simulator using existing simulator.
8. determining method as claimed in claim 7, it is characterised in that: the conventional exploitation three-dimensional oil reservoir numerical simulator is built
It is vertical to be established using simulator identical with steam soak three-dimensional oil reservoir numerical simulator, and guarantee in addition to heat injection parameter,
His model parameter is consistent.
9. determining method as described in claim 1, it is characterised in that: in the step 8), preset required precision is phase
Relationship number is greater than 0.98.
10. determining method as described in claim 1, it is characterised in that: in the step 9), verification method are as follows: if prediction error
Less than 10%, then multifactor calculation formula is reliable；If predicting, error is greater than 10%, corrects the steam soak exploitation pre-established
Three-dimensional oil reservoir numerical simulator.
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