CN105740563A - Preferential channel identification technology for secondary development of mature oil field - Google Patents
Preferential channel identification technology for secondary development of mature oil field Download PDFInfo
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F30/30—Circuit design
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Abstract
The invention discloses a preferential channel identification technology for the secondary development of a mature oil field. The technology comprises the following technical steps of 1, oil deposit area substance streamline simulation phase, wherein the phase focuses on the comprehensive analysis of the oil deposit, particularly the dynamic description and research phase of the four-dimensional oil deposit; and 2, modeling on the preferential channel identification technology for the secondary development of the mature oil field, specifically including fine geologically modeling, processing by using dynamic heterogeneous model and establishing a comprehensive adjustment and development scheme; the specific processes are as shown in figure 1. The technology provided by the invention is unique and novel in theory, applicable to the secondary development of the old producing area, in particular applicable to the secondary oil exploitation of the oil field in northeast and other old industrial bases, and is accurate and reliable; the technology provided by the invention can play a role in decreasing cost and increasing benefit, and in particular applicable to the deflationary environment with continuously decreased international oil price and gloomy economy.
Description
Technical field
Patent of the present invention relates to the secondary development of mature oilfield, i.e. secondary oil prospecting technical field, becomes
The secondary development in stand oil field and the emphasis of secondary oil prospecting, it should be that in laying particular emphasis on oil reservoir, ripple is owed in water filling
And district and periptery are in three-dimensional distribution and the searching of dominant flowing path and improvement, the former
It is the potentiality band (REGION OF WATER INJECTION OILFIELD) directly proposing secondary oil prospecting, and the latter provides needs and controls
The channeling water band (injecting inefficient cycle district) of reason；Under normal reservoir condition, both has ratio
Closer dependency, influences each other, but identifies that the latter i.e. dominant flowing path is at three-dimensional space
Between distribution identify more have actual application value and more benefit, the especially present invention one one-tenth
The predominant pathway identification technology of stand oil field secondary development.
Background technology
In prior art, traditional oil field development application is the most single, or block is average greatly,
The concept making oil reservoir is excessively simplified with technology its mode when carrying out Dynamic profiling, existing skill
Art is emphasized the reservoir point homogeneity on longitudinally, by a certain high permeability formation of a bite well the most directly and its
He is then connected by the high permeability formation of well, be exactly in logic one-dimensional add one-dimensional equal to three-dimensional, and actually
One-dimensional add one-dimensional or one-dimensional, because you only see and concentrate one's energy to study the one-dimensional of a pit shaft
Data, and two a bite wells or the one-dimensional data of a pit shaft of type, according to continental deposit
Learn ultimate principle, thing source to carrying formed lateral accretion, the most do not possess stablize right
The primary condition of ratio and material base, here it is the most universal just in widely used conventional skill
Art；And in the most commonly used technology, there is also the obvious defect of following points:
1. the challenge in terms of Geologic modeling:
As a example by Continental Basins In China, it is non-all that its oil reservoir has reservoir cross directional variations complexity on the whole
Anisotropism and anisotropy in the feature that matter is strong, many oil reservoir planes and longitudinal direction have collection
Middle performance.Have and grow in arid, the temporary mountain region of semiarid zone, owing to flood carries greatly
The deposition of the impact proluvial fan based on glutenite that amount megaclast is formed, its geometric shape is each
Different, macroscopic features and plane and longitudinal direction mostly are Heterogeneous reservoir feature；There are river, triangle
The typical land basin deposition that continent etc. are more common, thus formed and have in strong plane and longitudinal direction
Heterogeneous reservoir feature；The early stage deposition long-pending due to lateral folder is mingled with event of many phases
Deposition and event between the seasonal sedimentary effect of phase, reservoir property has in plane and section
Variability and diachronism；
Therefore, use the reservoir description method emphasizing static parameter of routine by serious system
About, relatively greatly and deviation also can be bigger to implement difficulty；Say from textural, change after strong diagenesis
Inverse Nappe-fault system/layer of covering that appearance becomes exacerbates horizontal or even in longitudinal direction the segmentation of reservoir；
Reservoir architecture research difficulty is very big, and these are all to Geologic modeling essence based on static reservoir description
The serious challenge of degree, its reason may be more, stresses to point out following 2 important deficiencies at this:
One, the limitation in computational methods: be answering in view of above-mentioned petrogenesis " congenital "
Caused by polygamy so that it is result of calculation adds uncertainty；And existing method is based on single quiet
State reservoir description method, and multiple for the geology of reservoir properties or even reservoir distribution between trial zone well
Polygamy, the most therefore its computational methods have a greatly reduced quality；
Its two, the restricted gender of mode discrimination method: as land basin deposit the river of oil reservoir, lacustrine facies and three
Continent, angle class oil reservoir controlled factordisease is more, and mode discrimination method is relatively difficult, in terms of secondary development
Referential experience and lesson are the most relatively fewer in the world；
2. flow unit determines the challenge of aspect:
As far back as 1984, at research U.S. Wyoming State Hartog Draw oil field Shannon
During reservoir, Hearn et al. finds: the control to Production development of the difference of different parts reservoir quality
Effect is also not quite similar, and proposes the concept of flow unit (Flow unit).
Flow unit, refers to that the petrofacies affecting fluid flowing are similar in inside with petrophysical property
, vertical upper and transversely continuous print preserve rock mass.So preserve rock mass (flowing list same
Unit) internal, the geologic parameter affecting fluid flowing is similar, and between different flow units,
Petrofacies and petrophysical property obvious difference.People implement this method and still lay particular emphasis on geology
Research is originally as master, and combines reservoir interior rock feature and then promote the rock affecting fluid flowing
Stone physical property similarity, selects fluxion strap based on mostly using coring well core analyzing data and refers to
Mark；Such as the rock static parameters such as porosity, permeability, shale content, median grain diameter, reservoir
Flow unit method can be only applied to reservoir properties prediction and the evaluation of reservoir heterogeneity；
So-called flow unit, the hydraulic current moving cell (HFU) of the most more application is all
It it is the aspect carrying out oil reservoir static state description based on static geologic parameter；In view of on domestic Continental Reservoir
The complexity of the geologic feature stated, the reservoir static state applying limited well point data to be carried out describes
Uncertainty is the biggest, and gets up the most substantially completely to depend on prime number statically in practice
According to.This difficulty existed with Geologic modeling is essentially the same；And, structure complication is other one
Individual problem, for a lot of continental deposit middle and high infiltration sandstone reservoirs, no matter owing to it is gone back from plane
Being that upper reservoir properties all has strong heterogeneous body in the complication plus tomography, reservoir is thick
Degree change and complicated structure configuration relation, determine single static reservoir sign and far away can not
Meet the needs of oil field secondary development；
3. the challenge in terms of convenient value simulation:
There are two hang-ups in application convenient value analogue technique:
One, uses initial static data (i.e. drilling well, well logging or coring data before the several years)
The geological model set up removes the oil reservoir simulated now and attempts to solve the oil reservoir problem of today itself
It it is exactly one of problem；" static models " being always referred to as are from oil reservoir development and production history angle
Degree goes to observe, and it is real static？It is apparently not, and changes and big can not be neglected
Slightly disregarding, the time-varying model introducing permeability is the most necessary；
Its two, strong reservoir heterogeneity necessarily causes the early stage shape of reservoir dominant flowing path
Becoming, the flowing velocity of partial fluid is the highest, and Numerical-Mode based on finite difference (FD)
Type software, when calculating oil reservoir high water-cut stage, arises that obvious material non-conservation problem, from
And the pressure field obtained and saturation field are exactly distortion, the conclusion drawn on this basis can be past
Not being inconsistent toward with actual oil reservoir performance, there is the problem close with fluid-flow relation in many oil reservoirs
And puzzled cannot be less than answer in terms of reservoir numerical simulation；
In sum, since most states inland basin oil reservoir exists so or that in terms of exploitation
The problem of sample, and existing reservoir modeling technology can not provide answer, it is impossible to do not say that some is existing
Oil reservoir research and the thinking of numerical simulation and method there is also such and such urgently research with
The problem solved；Visible, introduce the predominant pathway identification of a kind of mature oilfield secondary development of invention
Technology, it is proposed that new oil reservoir investigative technique and method Just in Time；
Summary of the invention
It is an object of the present invention to provide the predominant pathway identification skill of a kind of mature oilfield secondary development
Art, solve existing Geologic modeling aspect, flow unit determines aspect and convenient value simulation
Defect that aspect scheduling theory and actual techniques exist and deficiency, by utilizing dominant flowing path to exist
Three-dimensional spatial distribution determines so that adjust and resolution has more specific aim and the most forthright,
While improve the prerequisite efficiency of oil field development and benefit, ensure oil field development enterprise
Industry vivosphere in the case of oil price depression；
How to efficiently identify oil reservoir predominant pathway and be middle old filed deep development and raising is gathered
The puzzled problem always existed in rate (EOR) work, of this technology this respect problem just
Break through and a skill upgrading；
In order to solve above-mentioned technical problem, the present invention provides the excellent of a kind of mature oilfield secondary development
Gesture channel recognition technology, including following technical step:
Step one, the early stage of described predominant pathway identification technology process:
The oil reservoir region material streamline simulation stage: this stage lays particular emphasis on the comprehensive analysis of oil reservoir,
Particularly four-dimensional Reservoir behavior describes and conceptual phase；Working procedure is also one find out and ask
Inscribing and propose basic ideas and the stage of draft scheme of solution problem, this stage is with reservoir region
Territory material streamline simulation and analytical technology are basic training；
Step 2, predominant pathway identification technology to a kind of mature oilfield secondary development are modeled
Process, including: fine geology modeling, dynamic non-homogeneous model and establishment structure adjusting exploitation side
Case；Idiographic flow is with reference to shown in Fig. 1；
Illustrating as one, the modeling of described fine geology includes: set up numerical simulation geology
Model, also includes based on data integration thereon, structure modeling, model attributes, geological statistics
Analyze, reserves calculate and grid roughening；
Illustrating as one, described dynamic non-homogeneous model includes: history matching for production,
And based on individual well thereon and well group flow analysis；Also including flows based on individual well and well group divides
Dominant flowing path identification process and study on characterization, current predominant pathway in analysis grind
Study carefully, distribution factor and quantify grid oil-containing volumetric abundance between well, also include based on above-described
Water filling periptery and remaining oil distribution research；
Illustrating as one, described establishment structure adjusting development plan includes: inject polymerization
Thing oil displacement agent numerical simulation and based on polymer oil-displacing agent individual well optimization design thereon and base
The screening of construction parameter thereon and optimization, also include: gathers and drives the description of rear dominant flowing path
Analyze, poly-drive rear advantage remaining oil distribution descriptive analysis, propose note and adopt parameters optimization suggestion；
Modeling in this step utilizes streamline numerical simulation trial speed and fast excellent of history matching
Gesture, uses simulation process technology, oil reservoir region material streamline is carried out described fine geology and builds
Mould, then carry out ripple, volume and drainage volume description and amount by described dynamic non-homogeneous model
Change, set up out and between well, between drain amount and well, cross water times quantification, combine finally by described establishment
Close and adjust development plan, build permeability time-varying model in time, and then clear and definite advantage seepage flow leads to
The description in road and identification, take into account description and the quantization of injection-production relation, holds injection-production program in time
Adjust and/or dominant flowing path comprehensive control；
Illustrating as one, described history matching is exactly the dynamic of use oil gas field actual production
Data information, is calculated by oil-gas reservoir simulation test run, checks and revise the geology that oil-gas reservoir is static
Model, understands fully oil-gas reservoir internal pressure and hydrodynamic distribution situation simultaneously, makes computer model
Keep consistent with actual oil-gas reservoir；Concrete example is with reference to shown in Fig. 2；
Illustrate as one, described ripple, volume and the drainage volume that can describe and quantify
It it is numerical simulation based on material streamline technique；Fig. 3 be finite difference directly apply △ x, △ y,
△ z, and material streamline technique introduces △ χ, △ ψ, △ τ stream function are new variables,
With reference to shown in Fig. 4, owing to every streamline all can be followed the trail of, it is possible to calculate every
The flow of streamline so that between water filling connection amount or well, drain amount can realize quantifying, and makes to involve body
Amass and can quantify；
Illustrate as one, cross water multiple between described quantization well between drain amount and well with reference to figure
Shown in 5, the motion pattern between well group, the flow that can be clearly seen, flow velocity and position, clearly
Clear reaction dominant flowing path forms opportunity, and the formation of dominant flowing path exists inexorable law,
I.e. form opportunity；
With reference to shown in Fig. 7, this test block after note in 1996 is poly-to-calendar year 2001 in 2000 by
Step forms dominant flowing path；
Illustrating as one, described permeability time-varying model of setting up refers to pass through streamline simulation
Technology considers owing to water drive washes away the time variation to reservoir reconstruction permeability, and it is by considering
During oil reservoir development, profit caused by the change of oil saturation flows mark mutually
Change thus cause the change of the effective permeability of water, thus set up fluid mobility and time
Between relation；Referring in particular to shown in Fig. 8；
As one illustrate, the description of described dominant flowing path and identification: refer to based on
The numerical simulation of material streamline technique and predominant current field theory Binding experiment block real data, real
The identification of existing three-dimensional predominant pathway and quantization signifying；Our streamline distribution is three-dimensional,
It can be with any rotation, by seeing the Soil profile of streamline between well, each substratum
Water absorption, it is judged that dominant flowing path is in three-dimensional distribution；Referring in particular to shown in Fig. 9；
Illustrate as one, the description of described injection-production relation and quantization: in tradition oil reservoir work
Cheng Zhong, distribution factor refers to injected water volume sendout in the plane between well, shown with reference to figure,
Distribution factor refers to that surrounding injection wells is much, meanwhile, flatly to certain a bite producing well yield effect
Inject well provides how many fluids to producing well around；Referring in particular to shown in Figure 10；
Illustrating as one, the adjustment of described injection-production program and/or dominant flowing path are combined
Close and administer: refer to that introducing time film flying is theoretical and oil reservoir is carried out four-dimensional dynamic fine description, fortune
With streamline numerical analogy method find plane advantage fluid-channeling channel, find water filling owe felt area and around
The remaining oil distribution in stream district is taped the latent power for lower step and is provided target area；Citing is the most as shown in Figure 11；
With reference to shown in Figure 12, intake profile surveyed by oil well described in described embodiment 1 of now illustrating
Contrast verification, by its injection water for successive years, its upper distribution and actual measurement intake profile
Test result can be mutually authenticated the technical know-how of the present invention, and result of calculation display precision is the highest；
With reference to Figure 13-15, show in particular the process that the relevant technical Analysis of embodiment 1 solves,
Felt area is owed in water filling on concern mature oilfield three dimensions and periptery is mature oilfield secondary
The key of exploitation secondary oil prospecting, although this is one has the strongest challenging problem, but
Significant, the adjustment that oilfield chemistry drives the displacement mobility ratio being reservoir water displacement oil recovery is (poly-
Compound) and the offer (surfactant and alkali) of displacement efficiency, substantial amounts of digital-to-analogue calculates and oil field is noted
There is the highest concordance in poly-practice, and the effect i.e. noting poly-first 1 year typically all compares
Good, streamlined impeller sunykatuib analysis shows, owing to the injection of polymer flooding makes the spread area of injection liquid
Significantly increase is had during long-pending relatively straight waterflooding.The most important reason is to touch water filling to owe to involve
District and periptery, and be exactly that the remaining oil in the middle of those deficient felt areas and periptery is more enriched with,
Even if the injection selected may is that concrete certain layer position, after entering oil reservoir flowing be three-dimensional and
It it not the simple laminar flow of real meaning；
The result of many Polymer Flooding Reservoirs numerical simulations is shown by application P3S, the note of polymer
Enter the oil production that really improve most oil wells, but further look at discovery, longitudinal flow
The change of flow profile contribution produced to volume increase expands produced with three-dimensional swept volume
Volume increase contribution is compared, and the former seems much smaller, it is understood that really make polymer flooding produce
The mechanistic reason of raw better effects is the expansion of swept volume, and the change of mobility ratio is table
As, from the viewpoint of the chronicity of oil reservoir development, globality and complexity, understand this point
And relevant problem is important because it may concern oil reservoir development length,
In and the solution formulation of short-term and adjustment, in terms of the Positive and Negative Aspects of understanding reservoir chemical flooding, really
Determine the initial time of reservoir chemical flooding and the assurance aspect of finish time, and implement chemical flooding
The aspect such as scale, scope and which type of chemical flooding combination helpful；At application P3S
In the practical study of software, first we take the average venturi of the whole district of pilot test district half
Footpath change and the relation of whole district's mean permeability, as a kind of technique study, this is sufficient.
Then the throat radius change of different well group well pair and the relation of local penetration rate it are quickly completed
Formula and the concrete data value i.e. spatial of advantage seepage flow band.Temporarily use at this
K2T () represents, K2It is time and spatial function.In our case study, it is with Bohai Sea
The research and analysis carried out as a example by the epimere oil reservoir of block Guantao, basin, bay；
Between water injection well swept volume 3-dimensional space quantization, injection-production well well, liquid transmission capacity quantifies, stream
Field intensity and flow field intensity index, the important parameter such as foundation of permeability time-varying model and concept and
Its quantitative relationship is that we carry out the basis of modern dynamic reservoir description and predominant pathway identification and prop up
Post, the three-dimensional streamline numerical simulation software of application carries out numerical computations, history matching, adjusts model
Parameter, after the identical precision that fitting result reaches certain, it was demonstrated that model and the actual kissing of mining site
Merge and there is certain accuracy, just can do next step analysis；
The analysis of Production development, is to recognize three-dimensional streamline distributions, obtains water
The situation that involves (sweep area and swept volume) of stream, and then understanding predominant current field areas is three
The spread of dimension space；The mechanism of advantage flow field formation, opportunity in the range of block, introduce brand-new
Flow field intensity index evaluate advantage flow field, in conjunction with the parameter such as recovery percent of reserves, oil saturation
Judge the existence of predominant pathway, then observe predominant pathway in three-dimensional by the three-dimensional visualization in flow field
It is layered streamline and the mobility status of stealthy streamline in spread spatially and evolution and three dimensions；
Carry out genetic analysis that remaining oil stockpiles, distribution to remaining oil carries out regular summary, makes
The remaining oil distribution obtained eventually is accurately calculated, and, divides the potentiality of remaining oil enriched area meanwhile
Cloth and excavating resistance guarantee that adaptability is also carried out certain analysis, it is ensured that the measure in later stage is can
Go and effective.
As a kind of preferred embodiment, predominant pathway crosses the calculating of water multiple and micro-variations:
Setting up the relational expression of reservoir average throat radius and mean permeability is seepage force for many years
One of emphasis of educational circles's research, when we apply numerical solution, this meaning becomes more to have valency
Value, because specifically average throat radius and the mean permeability of certain grid can only be defined in specifically
Certain or some grids in, this just can coincide with consistent with overall anisotropism, also
It is the true essence place that heterogeneous body is carried out numerical solution, completes unified with numerical simulation；
Enumerate two average throat radiuses as follows with the research of the relational expression of mean permeability:
Jacob Bear is from the research (seeing below) of the seventies in last century and to nearest moral
The research (SPE-165356) of the Guodarzi&etc. of Ke Sasi university-Jane Austen is all this
The technology of application provides support, the former general woods of permeation fluid mechanics great master having long enjoyed a good reputation according to the world
The research of college professor Jacob Bear, establishes the relation of throat radius and permeability
Formula is following (Jacob Bear 1972, P165,1983, P78):
R venturi hydraulic radius, for the 1/2 of throat radius
R throat radius；r1Original throat radius；r2After change, throat radius is (in time
Than change)
F'(s) venturi dimensionless factor；F'(n) the porosity factor (dimensionless)
K2
After change, throat radius is r2, r2>r1, r2It is the function of time, r2(t)
K1 original permeability field；
The permeability fields in K2 a certain moment, was when the given concrete time
Also referred to as Kt, it is also possible to be whole district's mean permeability.
K in 2 formulas above2Be time-varying be i.e. the function K of time2(t), value and phase
The throat radius answering the time period is consistent；2 formulas use r when us1Represent r2Time, we are just
Establish the function r of time2(t) and K2The relation of (t)；
Reservoir history matching is the important step of numerical simulation, and the quality of matching directly influences ground
The degree of reliability of matter model, can the geological model i.e. set up really reflect the geology of oil reservoir, open
Send out, underground fluid seepage characteristics.Only dynamic history match success, just can prove that in computer
Reservoir models with the actual oil-gas reservoir being modeled be consistent or close, then ensure after
The result of simulation and forecast is of practical significance.
Through above-mentioned complete technical step, the development efficiency of middle old filed and benefit are all returned and can be obtained
To promoting, what the most present oil field cost efficiency was badly in need of innovates technologies；Existing field management exists
Treat in mature oilfield secondary development, mostly focus on field engineering and implement, be particular about how many mouths
Stifled, the tune workload etc. of well, and in terms of the Dynamic profiling overall to oil field/block and analysis
There is shortcoming；(i.e. experimental model is set up and experimental analysis is surveyed relatively to focus on thing mould in terms of research
Examination), and do in terms of numerical experiment research inadequate；Have completes some numerical experiments,
But also having certain gap with the ability of actual combination degree and solving practical problems, the present invention is high
Effect is implemented mature oilfield secondary development accurately and is provided accurate guidance；
Beneficial effects of the present invention:
1, this inventive technique theory is unique, novel, adapts to the secondary development in present old producing region,
The oil field secondary being particularly suitable for the old industrial bases such as northeast visits oil, and this inventive technique is accurately, reliably；
2, the technology of this invention can play the effect of cost efficiency, is especially suitable for the present world
Oil price continues to fall, the deflation environment that economic slump is depressed.
Accompanying drawing explanation
Fig. 1 is the principle knot of the predominant pathway identification technology of one mature oilfield secondary development of the present invention
Structure schematic diagram
Fig. 2 is that the history of the predominant pathway identification technology of one mature oilfield secondary development of the present invention is intended
The dynamic data data exemplary graph closed
Fig. 3 be the predominant pathway identification technology of one mature oilfield secondary development of the present invention based on thing
The finite difference spatial spreading schematic diagram of the numerical simulation of mass flow line technology
Fig. 4 be the predominant pathway identification technology of one mature oilfield secondary development of the present invention based on thing
Numerical simulation of mass flow line technology and his like collimation method spatial spreading schematic diagram
Fig. 5 is the quantization well of the predominant pathway identification technology of one mature oilfield secondary development of the present invention
Between between drain amount and well cross water multiple example schematic
Fig. 6 is the embodiment 1 of the predominant pathway identification technology of one mature oilfield secondary development of the present invention
Accumulation wells in 2013 between cross water multiple schematic diagram
Fig. 7 is that the advantage of the predominant pathway identification technology of one mature oilfield secondary development of the present invention is oozed
Formation citing on opportunity (-calendar year 2001 in 2000 gradually forms dominant flowing path) of circulation road is shown
It is intended to
Fig. 8 is the embodiment 1 of the predominant pathway identification technology of one mature oilfield secondary development of the present invention
Described basins in East China oil field permeability time-varying model and waterflood efficiency contrast effect figure
Fig. 9 is that the citing of the predominant pathway identification technology of one mature oilfield secondary development of the present invention is led to
Cross see well between the Soil profile schematic diagram of streamline
Figure 10 is certain emphasis of the predominant pathway identification technology of one mature oilfield secondary development of the present invention
Well group distribution factor example schematic
Figure 11 is the note side of adopting of the predominant pathway identification technology of one mature oilfield secondary development of the present invention
Case adjusts and/or dominant flowing path comprehensive control example schematic
Figure 12 is the embodiment of the predominant pathway identification technology of one mature oilfield secondary development of the present invention
1 well is surveyed the contrast verification figure of intake profile
Figure 13 is the example 1 of the predominant pathway identification technology of one mature oilfield secondary development of the present invention
Architecture diagram or modular functional block diagram
Figure 14 is the example 1 of the predominant pathway identification technology of one mature oilfield secondary development of the present invention
According to data stream flow to describe specific implementation schematic diagram
Figure 15 is certain oil of the predominant pathway identification technology of one mature oilfield secondary development of the present invention
The predominant pathway hidden forms the example of the determination on opportunity and forms the comparison schematic diagram at initial stage on opportunity
Detailed description of the invention
Below in conjunction with the accompanying drawings to a preferred embodiment of the present invention will be described in detail；
Shown in reference Fig. 1, the predominant pathway identification technology of a kind of mature oilfield secondary development, bag
Include following technical step:
Step one, the early stage of described predominant pathway identification technology process:
The oil reservoir region material streamline simulation stage: this stage lays particular emphasis on the comprehensive analysis of oil reservoir,
Particularly four-dimensional Reservoir behavior describes and conceptual phase；Working procedure is also one find out and ask
Inscribing and propose basic ideas and the stage of draft scheme of solution problem, this stage is with reservoir region
Territory material streamline simulation and analytical technology are basic training；
Step 2, predominant pathway identification technology to a kind of mature oilfield secondary development are modeled
Process, including: fine geology modeling, dynamic non-homogeneous model and establishment structure adjusting exploitation side
Case；Idiographic flow is with reference to shown in Fig. 1；
Illustrating as one, the modeling of described fine geology includes: set up numerical simulation geology
Model, also includes based on data integration thereon, structure modeling, model attributes, geological statistics
Analyze, reserves calculate and grid roughening；
Illustrating as one, described dynamic non-homogeneous model includes: history matching for production,
And based on individual well thereon and well group flow analysis；Also including flows based on individual well and well group divides
Dominant flowing path identification process and study on characterization, current predominant pathway in analysis grind
Study carefully, distribution factor and quantify grid oil-containing volumetric abundance between well, also include based on above-described
Water filling periptery and remaining oil distribution research；
Illustrating as one, described establishment structure adjusting development plan includes: inject polymerization
Thing oil displacement agent numerical simulation and based on polymer oil-displacing agent individual well optimization design thereon and base
The screening of construction parameter thereon and optimization, also include: gathers and drives the description of rear dominant flowing path
Analyze, poly-drive rear advantage remaining oil distribution descriptive analysis, propose note and adopt parameters optimization suggestion；
Modeling in this step utilizes streamline numerical simulation trial speed and fast excellent of history matching
Gesture, uses simulation process technology, oil reservoir region material streamline is carried out described fine geology and builds
Mould, then carry out ripple, volume and drainage volume description and amount by described dynamic non-homogeneous model
Change, set up out and between well, between drain amount and well, cross water times quantification, combine finally by described establishment
Close and adjust development plan, build permeability time-varying model in time, and then clear and definite advantage seepage flow leads to
The description in road and identification, take into account description and the quantization of injection-production relation, holds injection-production program in time
Adjust and/or dominant flowing path comprehensive control；
Illustrating as one, described history matching is exactly the dynamic of use oil gas field actual production
Data information, is calculated by oil-gas reservoir simulation test run, checks and revise the geology that oil-gas reservoir is static
Model, understands fully oil-gas reservoir internal pressure and hydrodynamic distribution situation simultaneously, makes computer model
Keep consistent with actual oil-gas reservoir；Concrete example is with reference to shown in Fig. 2；
Illustrate as one, described ripple, volume and the drainage volume that can describe and quantify
It it is numerical simulation based on material streamline technique；Fig. 3 be finite difference directly apply △ x, △ y,
△ z, and material streamline technique introduces △ χ, △ ψ, △ τ stream function are new variables,
With reference to shown in Fig. 4, owing to every streamline all can be followed the trail of, it is possible to calculate every
The flow of streamline so that between water filling connection amount or well, drain amount can realize quantifying, and makes to involve body
Amass and can quantify；
Illustrate as one, cross water multiple between described quantization well between drain amount and well with reference to figure
Shown in 5, the motion pattern between well group, the flow that can be clearly seen, flow velocity and position, clearly
Clear reaction dominant flowing path forms opportunity, and the formation of dominant flowing path exists inexorable law,
I.e. form opportunity；
With reference to shown in Fig. 7, this test block after note in 1996 is poly-to-calendar year 2001 in 2000 by
Step forms dominant flowing path；
Illustrating as one, described permeability time-varying model of setting up refers to pass through streamline simulation
Technology considers owing to water drive washes away the time variation to reservoir reconstruction permeability, and it is by considering
During oil reservoir development, profit caused by the change of oil saturation flows mark mutually
Change thus cause the change of the effective permeability of water, thus set up fluid mobility and time
Between relation；Referring in particular to shown in Fig. 8；
As one illustrate, the description of described dominant flowing path and identification: refer to based on
The numerical simulation of material streamline technique and predominant current field theory Binding experiment block real data, real
The identification of existing three-dimensional predominant pathway and quantization signifying；Our streamline distribution is three-dimensional,
It can be with any rotation, by seeing the Soil profile of streamline between well, each substratum
Water absorption, it is judged that dominant flowing path is in three-dimensional distribution；Referring in particular to shown in Fig. 9；
Illustrate as one, the description of described injection-production relation and quantization: in tradition oil reservoir work
Cheng Zhong, distribution factor refers to injected water volume sendout in the plane between well, shown with reference to figure,
Distribution factor refers to that surrounding injection wells is much, meanwhile, flatly to certain a bite producing well yield effect
Inject well provides how many fluids to producing well around；Referring in particular to shown in Figure 10；
Illustrating as one, the adjustment of described injection-production program and/or dominant flowing path are combined
Close and administer: refer to that introducing time film flying is theoretical and oil reservoir is carried out four-dimensional dynamic fine description, fortune
With streamline numerical analogy method find plane advantage fluid-channeling channel, find water filling owe felt area and around
The remaining oil distribution in stream district is taped the latent power for lower step and is provided target area；Citing is the most as shown in Figure 11；
With reference to shown in Figure 12, intake profile surveyed by oil well described in described embodiment 1 of now illustrating
Contrast verification, by its injection water for successive years, its upper distribution and actual measurement intake profile
Test result can be mutually authenticated the technical know-how of the present invention, and result of calculation display precision is the highest；
With reference to Figure 13-15, show in particular the process that the relevant technical Analysis of embodiment 1 solves,
Felt area is owed in water filling on concern mature oilfield three dimensions and periptery is mature oilfield secondary
The key of exploitation secondary oil prospecting, although this is one has the strongest challenging problem, but
Significant, the adjustment that oilfield chemistry drives the displacement mobility ratio being reservoir water displacement oil recovery is (poly-
Compound) and the offer (surfactant and alkali) of displacement efficiency, substantial amounts of digital-to-analogue calculates and oil field is noted
There is the highest concordance in poly-practice, and the effect i.e. noting poly-first 1 year typically all compares
Good, streamlined impeller sunykatuib analysis shows, owing to the injection of polymer flooding makes the spread area of injection liquid
Significantly increase is had during long-pending relatively straight waterflooding.The most important reason is to touch water filling to owe to involve
District and periptery, and be exactly that the remaining oil in the middle of those deficient felt areas and periptery is more enriched with,
Even if the injection selected may is that concrete certain layer position, after entering oil reservoir flowing be three-dimensional and
It it not the simple laminar flow of real meaning；
The result of many Polymer Flooding Reservoirs numerical simulations is shown by application P3S, the note of polymer
Enter the oil production that really improve most oil wells, but further look at discovery, longitudinal flow
The change of flow profile contribution produced to volume increase expands produced with three-dimensional swept volume
Volume increase contribution is compared, and the former seems much smaller, it is understood that really make polymer flooding produce
The mechanistic reason of raw better effects is the expansion of swept volume, and the change of mobility ratio is table
As, from the viewpoint of the chronicity of oil reservoir development, globality and complexity, understand this point
And relevant problem is important because it may concern oil reservoir development length,
In and the solution formulation of short-term and adjustment, in terms of the Positive and Negative Aspects of understanding reservoir chemical flooding, really
Determine the initial time of reservoir chemical flooding and the assurance aspect of finish time, and implement chemical flooding
The aspect such as scale, scope and which type of chemical flooding combination helpful；At application P3S
In the practical study of software, first we take the average venturi of the whole district of pilot test district half
Footpath change and the relation of whole district's mean permeability, as a kind of technique study, this is sufficient.
Then the throat radius change of different well group well pair and the relation of local penetration rate it are quickly completed
Formula and the concrete data value i.e. spatial of advantage seepage flow band.Temporarily use at this
K2T () represents, K2It is time and spatial function.In our case study, it is with Bohai Sea
The research and analysis carried out as a example by the epimere oil reservoir of block Guantao, basin, bay；
Between water injection well swept volume 3-dimensional space quantization, injection-production well well, liquid transmission capacity quantifies, stream
Field intensity and flow field intensity index, the important parameter such as foundation of permeability time-varying model and concept and
Its quantitative relationship is that we carry out the basis of modern dynamic reservoir description and predominant pathway identification and prop up
Post, the three-dimensional streamline numerical simulation software of application carries out numerical computations, history matching, adjusts model
Parameter, after the identical precision that fitting result reaches certain, it was demonstrated that model and the actual kissing of mining site
Merge and there is certain accuracy, just can do next step analysis；
The analysis of Production development, is to recognize three-dimensional streamline distributions, obtains water
The situation that involves (sweep area and swept volume) of stream, and then understanding predominant current field areas is three
The spread of dimension space；The mechanism of advantage flow field formation, opportunity in the range of block, introduce brand-new
Flow field intensity index evaluate advantage flow field, in conjunction with the parameter such as recovery percent of reserves, oil saturation
Judge the existence of predominant pathway, then observe predominant pathway in three-dimensional by the three-dimensional visualization in flow field
It is layered streamline and the mobility status of stealthy streamline in spread spatially and evolution and three dimensions；
Carry out genetic analysis that remaining oil stockpiles, distribution to remaining oil carries out regular summary, makes
The remaining oil distribution obtained eventually is accurately calculated, and, divides the potentiality of remaining oil enriched area meanwhile
Cloth and excavating resistance guarantee that adaptability is also carried out certain analysis, it is ensured that the measure in later stage is can
Go and effective.
As a kind of preferred embodiment, predominant pathway crosses the calculating of water multiple and micro-variations:
Setting up the relational expression of reservoir average throat radius and mean permeability is seepage force for many years
One of emphasis of educational circles's research, when we apply numerical solution, this meaning becomes more to have valency
Value, because specifically average throat radius and the mean permeability of certain grid can only be defined in specifically
Certain or some grids in, this just can coincide with consistent with overall anisotropism, also
It is the true essence place that heterogeneous body is carried out numerical solution, completes unified with numerical simulation；
Enumerate two average throat radiuses as follows with the research of the relational expression of mean permeability:
Jacob Bear is from the research (seeing below) of the seventies in last century and to nearest moral
The research (SPE-165356) of the Guodarzi&etc. of Ke Sasi university-Jane Austen is all this
The technology of application provides support, the former general woods of permeation fluid mechanics great master having long enjoyed a good reputation according to the world
The research of college professor Jacob Bear, establishes the relation of throat radius and permeability
Formula is following (Jacob Bear 1972, P165,1983, P78):
R venturi hydraulic radius, for the 1/2 of throat radius
R throat radius；r1Original throat radius；r2After change, throat radius is (in time
Than change)
F'(s) venturi dimensionless factor；F'(n) the porosity factor (dimensionless)
After change, throat radius is r2, r2>r1, r2It is the function of time, r2(t)
K1 original permeability field；
The permeability fields in K2 a certain moment, was when the given concrete time
Also referred to as Kt, it is also possible to be whole district's mean permeability.
K in 2 formulas above2Be time-varying be i.e. the function K of time2(t), value and phase
The throat radius answering the time period is consistent；2 formulas use r when us1Represent r2Time, we are just
Establish the function r of time2(t) and K2The relation of (t)；
Reservoir history matching is the important step of numerical simulation, and the quality of matching directly influences ground
The degree of reliability of matter model, can the geological model i.e. set up really reflect the geology of oil reservoir, open
Send out, underground fluid seepage characteristics.Only dynamic history match success, just can prove that in computer
Reservoir models with the actual oil-gas reservoir being modeled be consistent or close, then ensure after
The result of simulation and forecast is of practical significance.
Through above-mentioned complete technical step, the development efficiency of middle old filed and benefit are all returned and can be obtained
To promoting, what the most present oil field cost efficiency was badly in need of innovates technologies；Existing field management exists
Treat in mature oilfield secondary development, mostly focus on field engineering and implement, be particular about how many mouths
Stifled, the tune workload etc. of well, and in terms of the Dynamic profiling overall to oil field/block and analysis
There is shortcoming；(i.e. experimental model is set up and experimental analysis is surveyed relatively to focus on thing mould in terms of research
Examination), and do in terms of numerical experiment research inadequate；Have completes some numerical experiments,
But also having certain gap with the ability of actual combination degree and solving practical problems, the present invention is high
Effect is implemented mature oilfield secondary development accurately and is provided accurate guidance；
This inventive technique theory is unique, novel, adapts to the secondary development in present old producing region, special
The oil field secondary not being suitable for the old industrial bases such as northeast visits oil, and this inventive technique is accurately, reliably；
The technology of this invention can play the effect of cost efficiency, is especially suitable for present international oil price and continues
Drop, the deflation environment that economic slump is depressed；
Above-described only the preferred embodiments of the present invention, be it should be understood that above enforcement
The explanation of example is only intended to help to understand method and the core concept thereof of the present invention, is not used to limit
Determining protection scope of the present invention, that is done within all thought in the present invention and principle any repaiies
Change, equivalent etc., should be included within the scope of the present invention.
Claims (10)
1. the predominant pathway identification technology of a mature oilfield secondary development, it is characterised in that include following technical step:
Step one, the early stage of described predominant pathway identification technology process:
In the oil reservoir region material streamline simulation stage: this stage lays particular emphasis on the comprehensive analysis of oil reservoir, particularly four-dimensional Reservoir behavior describes and conceptual phase；Also being one in working procedure find out problem and propose the basic ideas of solution problem and the stage of draft scheme, this stage is with oil reservoir region material streamline simulation and analytical technology as basic training；
Step 2, predominant pathway identification technology to a kind of mature oilfield secondary development are modeled processing, including: fine geology modeling, dynamic non-homogeneous model and establishment structure adjusting development plan；
The modeling of described fine geology includes: set up numerical simulation geological model, also includes calculating and grid roughening based on data integration thereon, structure modeling, model attributes, geostatistical analysis, reserves；
Described dynamic non-homogeneous model includes: history matching for production, and based on individual well thereon and well group flow analysis；Also include based on distribution factor between the dominant flowing path identification process on individual well and well group flow analysis and study on characterization, the research of current predominant pathway, well and quantify grid oil-containing volumetric abundance, also including based on above-described water filling periptery and remaining oil distribution research；
Described establishment structure adjusting development plan includes: injection of polymer oil displacement agent numerical simulation and based on polymer oil-displacing agent individual well optimization thereon design and screening based on construction parameter thereon and optimization, also includes: poly-drives rear dominant flowing path descriptive analysis, poly-drive rear advantage remaining oil distribution descriptive analysis, propose note and adopt parameters optimization suggestion；
Modeling in this step utilizes streamline numerical simulation trial speed and the fast advantage of history matching, use simulation process technology, oil reservoir region material streamline is carried out described fine geology modeling, ripple is carried out again by described dynamic non-homogeneous model, volume and drainage volume describe and quantify, set up out and between well, between drain amount and well, cross water times quantification, finally by described establishment structure adjusting development plan, build permeability time-varying model in time, and then the description of clear and definite dominant flowing path and identification, take into account description and the quantization of injection-production relation, hold adjustment and/or the dominant flowing path comprehensive control of injection-production program in time.
The predominant pathway identification technology of a kind of mature oilfield secondary development the most according to claim 1, it is characterized in that, described history matching is exactly by the dynamic data data of oil gas field actual production, calculated by oil-gas reservoir simulation test run, check and revise the geological model that oil-gas reservoir is static, understand fully oil-gas reservoir internal pressure and hydrodynamic distribution situation simultaneously, make computer model keep consistent with actual oil-gas reservoir.
The predominant pathway identification technology of a kind of mature oilfield secondary development the most according to claim 2, it is characterised in that described ripple, volume and the drainage volume that can describe and quantify is numerical simulation based on material streamline technique；Finite difference directly applies △ x, △ y, △ z, and material streamline technique introduces △ χ, △ ψ, △ τ stream function are new variables, owing to every streamline all can be followed the trail of, so the flow of every streamline can be calculated, make drain amount between water filling connection amount or well can realize quantifying, make swept volume to quantify.
The predominant pathway identification technology of a kind of mature oilfield secondary development the most according to claim 3, it is characterised in that cross water multiple between described quantization well between drain amount and well and can reflect that the formation of dominant flowing path exists inexorable law, i.e. form opportunity.
The predominant pathway identification technology of a kind of mature oilfield secondary development the most according to claim 4, it is characterized in that, described permeability time-varying model of setting up refers to consider owing to water drive washes away the time variation to reservoir reconstruction permeability by streamline simulation technology, it is flow mutually the changing thus cause the change of the effective permeability of water of mark by the profit considering during oil reservoir development caused by the change of oil saturation, thus sets up the mobility of fluid and the relation of time.
The predominant pathway identification technology of a kind of mature oilfield secondary development the most according to claim 5, it is characterized in that, the description of described dominant flowing path and identification: refer to numerical simulation based on material streamline technique and predominant current field theory Binding experiment block real data, it is achieved the identification of three-dimensional predominant pathway and quantization signifying；Our streamline distribution is three-dimensional, and it can be with any rotation, by seeing the Soil profile of streamline between well, the water absorption of each substratum, it is judged that dominant flowing path is in three-dimensional distribution.
The predominant pathway identification technology of a kind of mature oilfield secondary development the most according to claim 6, it is characterized in that, the description of described injection-production relation and quantization refer to that surrounding injection wells is much to certain a bite producing well yield effect, meanwhile, inject well provides how many fluids to producing well around flatly.
The predominant pathway identification technology of a kind of mature oilfield secondary development the most according to claim 7, it is characterized in that, the adjustment of described injection-production program and/or dominant flowing path comprehensive control: refer to that introducing time film flying is theoretical and oil reservoir is carried out four-dimensional dynamic fine description, use streamline numerical analogy method to find plane advantage fluid-channeling channel, find water filling and owe the remaining oil distribution of felt area and periptery and tap the latent power offer target area for lower step.
The predominant pathway identification technology of a kind of mature oilfield secondary development the most according to claim 8, it is characterised in that described water multiple of crossing refers to set up the relational expression of reservoir average throat radius and mean permeability.
The predominant pathway identification technology of a kind of mature oilfield secondary development the most according to claim 9, it is characterised in that the computing formula of described water multiple excessively is:
Wherein, radius is r2, r2>r1, r2It is the function of time, r2(t)
K1 original permeability field；
The permeability fields in K2 a certain moment, is also referred to as Kt when the given concrete time, it is also possible to be whole district's mean permeability.
K in described formula2Be time-varying be i.e. the function K of time2T (), value is consistent with the throat radius of corresponding time period；When we use r1Represent r2Time, we just establish the function r of time2(t) and K2The relation of (t).
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