CN106703779A - Injection-production well pattern construction method suitable for carbonate fractured-cave reservoirs - Google Patents
Injection-production well pattern construction method suitable for carbonate fractured-cave reservoirs Download PDFInfo
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- CN106703779A CN106703779A CN201611101273.0A CN201611101273A CN106703779A CN 106703779 A CN106703779 A CN 106703779A CN 201611101273 A CN201611101273 A CN 201611101273A CN 106703779 A CN106703779 A CN 106703779A
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- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title claims abstract description 87
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 56
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 34
- 239000011435 rock Substances 0.000 claims description 50
- 239000011148 porous material Substances 0.000 claims description 32
- 238000009826 distribution Methods 0.000 claims description 25
- 238000004891 communication Methods 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 9
- 238000005457 optimization Methods 0.000 claims description 6
- 239000000700 radioactive tracer Substances 0.000 claims description 6
- 238000005065 mining Methods 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 5
- 239000000295 fuel oil Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000007621 cluster analysis Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 11
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 230000001788 irregular Effects 0.000 abstract description 5
- 235000019994 cava Nutrition 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 208000010392 Bone Fractures Diseases 0.000 description 136
- 206010017076 Fracture Diseases 0.000 description 136
- 239000000243 solution Substances 0.000 description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 239000003921 oil Substances 0.000 description 18
- 238000000605 extraction Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 208000013201 Stress fracture Diseases 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 241000272525 Anas platyrhynchos Species 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 230000009466 transformation Effects 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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
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- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses an injection-production well pattern construction method suitable for carbonate fractured-cave reservoirs and relates to the technical field of oil and gas reservoir development. The method includes the steps that the types of carbonate fractured-cave structures are recognized; according to different types, the fractured-cave structures are depicted; the correlation of communicated fractured cave structures in fractured caves is analyzed, and a fractured cave reservoir body communicated structure is built; used reserves and control reserves of fractured cave reservoir bodies are calculated and marked; an injection-production well pattern mode corresponding to a Karst geological backgrounds of the carbonate fractured-cave reservoirs is constructed; a well pattern injection production relation of the carbonate fractured-cave reservoirs is built and optimized. The method solves the problems that a conventional injection-production well pattern construction method is not applicable to development of the carbonate fractured-cave reservoirs and an existing irregular well pattern deployment method is not mature or referential. The new injection-production well pattern construction method suitable for the fractured-cave reservoirs is provided and improves the recovery efficiency of the fractured-cave reservoirs.
Description
Technical field
The present invention relates to Reservoir Development technical field, and in particular to a kind of note suitable for fracture and vug carbonate reservoir
Adopt well pattern construction method.
Background technology
Diaclase and karstification shape that Carbonate Rocks In Tahe Oilfield fracture-pore reservoir Reservoir Body is produced with structural deformation
Into hole, hole, based on seam, its carbonate rock matrix oozes meaning, and its reservoir space form of diverse, size without storage substantially
Great disparity, skewness, with extremely strong anisotropism.It is both different from Middle East carbonate fracture type oil reservoir, also different
In the typical carbonate fracture in Eastern China-hole type oil reservoir, more different from conventional orifices gap sandstone oil reservoir.
The fracture-pore reservoir flooding pattern for using at present is mainly to employ object with big hole based on Productivity Construction period
Basic well pattern, the fracture hole controlling extent to small yardstick is relatively low, because Carbonate Reservoir is so that fracture-cavity units are as exploitation and manage
Reason object, but the fracture hole of Carbonate Reservoir is greatly different in size, skewness, therefore current fracture-pore reservoir flooding pattern is not
Fracture and vug carbonate reservoir can be completely suitable for；Current clastic rock oil reservoir has formd more ripe flooding pattern and has built
Thinking and method, its well net deployment form mainly have 3 kinds, line pattern, areal well pattern and skewed pattern, but routine
The form and construction method of clastic rock oil reservoir flooding pattern are not particularly suited for fracture and vug carbonate reservoir, because the chip of routine
Shale oil hide regular well pattern (including line pattern and areal well pattern) be to oil reservoir structural requirement：Oil reservoir structure than it is more complete,
Oil-layer distribution is more stable, and oil bondary position will be clear that, inside and outside connectedness will get well, flow coefficient is high and therein
Line pattern is not suitable with the oil reservoir of serious heterogeneity, and it is uneven that it is easily caused waterline propulsion；It is flat between oil-water well in areal well pattern
Sweep efficiency influence of the face geometrical relationship on water filling is very big, it is desirable to have well-regulated well pattern form, due to carbonate rock fractured cave type
Oil reservoir has extremely strong anisotropism and scrambling, therefore the construction method and well pattern form of regular well pattern are difficult to carry out,
It is poor for applicability.And the deployment of skewed pattern is small mainly for oil field area, oil-layer distribution is irregular, it is difficult to the note of layout rules
Well net, the deployment of skewed pattern carries out well net deployment using irregular spot flooding mode, but for anisotropism
How extremely strong fracture-pore reservoir, consider different reservoir space types, seam hole structure and injection-production relation feature, preferably water flooding regime
And well pattern form etc., the deployment of skewed pattern is all without ripe referential Constructed wetlands and method.
As can be seen here, a set of flooding pattern suitable for fracture and vug carbonate reservoir feature is not formed at present to build
Method.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome above mentioned problem or at least in part solve on
State the flooding pattern construction method suitable for fracture and vug carbonate reservoir of problem.
According to present invention, there is provided a kind of flooding pattern construction method suitable for fracture and vug carbonate reservoir,
Including：Identification carbonate rock fractured cave structure type, the difference according to the seam hole structure type is carved to the seam hole structure
Draw；The fracture-cavity units inside connectivity structure incidence relation of the seam hole structure is analyzed, fracture and cave reservoir connectivity structure is set up；Calculate
With the mining-employed reserves and control reserve for indicating the fracture and cave reservoir；Set up and the fracture and vug carbonate reservoir karst region
The corresponding well pattern form of matter background；The well pattern injection-production relation of the fracture and vug carbonate reservoir is set up, and to the carbonic acid
Rock salt fracture-pore reservoir well pattern is optimized.
Alternatively, the seam hole structure type includes：Solution cavity structure and fissured structure；The identification carbonate rock fractured cave
Structure type, according to seam hole structure type difference the seam hole structure is portrayed the step of further include：Using shaking
Width gradient attribute and instantaneous energy attribute carry out outline identification to the solution cavity structure, and combine maximum curvature attribute and phase
Dry attribute carries out the cluster analysis of earthquake solution cavity phase to the solution cavity structure, and the earthquake solution cavity is mutually portrayed；Using most
Deep camber attribute carries out crack identification to the fissured structure, and the fissured structure is entered with reference to stratigraphic dip and coherence properties
Row Seismic Fracture phase is portrayed.
Alternatively, in the identification carbonate rock fractured cave structure type, the difference according to the seam hole structure type is to institute
State after seam hole structure portrayed, methods described is further included：The seismic response of homogenous characteristics is sorted out, it is right to reduce
The multi-solution that geologic feature is explained, for realizing finely recognizing and portraying to the seam hole structure.
Alternatively, the fracture-cavity units inside connectivity structure incidence relation of the analysis seam hole structure, sets up fracture hole storage
The step of collective's connectivity structure, includes：Carry out static connection fracture hole to the seam hole structure to follow the trail of, for realizing dividing the seam
Hole unit inside connectivity structure incidence relation；Using dynamic communication information to fracture-cavity units inside connectivity structure incidence relation
Dynamic connection checking is carried out, fracture and cave reservoir connectivity structure is set up.
Alternatively, it is described to calculate and include the step of indicating the mining-employed reserves and control reserve of the fracture and cave reservoir：
The mining-employed reserves value of the mining-employed reserves is calculated, the distribution spy of Fuel Oil Remaining in mining-employed reserves is determined according to result of calculation
Point, for providing foundation to set up well pattern injection-production relation and well pattern form；The control reserve scope of the control reserve is indicated,
The characteristic distributions of remaining non-control reserve are determined according to sign result, so that the deployment for injection-production well provides foundation.
Alternatively, it is described to set up the well pattern form corresponding with the Karst Geological Landscape background of the fracture and vug carbonate reservoir
The step of further include：Connected according to the seam hole structure, the scale of the fracture and cave reservoir and the fracture and cave reservoir
Structure sets up the flooding pattern form corresponding with the Karst Geological Landscape background of the fracture-pore reservoir of the carbonate rock fractured cave.
Alternatively, it is described set up the fracture and vug carbonate reservoir well pattern injection-production relation the step of include：According to institute
The note mining height lower position relation of the reservoir space type and the fracture-pore reservoir of stating fracture and cave reservoir sets up well pattern note and adopts pass
System；The characteristics of Distribution Characteristics and the seam hole structure according to the fracture and cave reservoir, sets up well pattern injection-production relation.
Alternatively, it is described to include the step of optimized to the fracture and vug carbonate reservoir well pattern：According to different
Flooding pattern form and well pattern injection-production relation set up that plane is multidirectional, longitudinal multistage three-dimensional flooding pattern.
Alternatively, the well pattern form includes：Planar well pattern, wire well pattern and banding well pattern.
Alternatively, the dynamic communication information includes：Inter-well interference information, production characteristic similarity information, Flooding Characteristics
Information and tracer monitoring information.
The well pattern construction method suitable for fracture and vug carbonate reservoir provided in an embodiment of the present invention, can be first
By recognizing the seam hole structure type of carbonate rock fractured cave, and according to the different to carbonate rock of the seam hole structure type for being recognized
The seam hole structure of fracture hole is portrayed, and then analyzes the fracture-cavity units inside connectivity structure incidence relation of seam hole structure, sets up seam
Hole Reservoir Body connectivity structure, and the mining-employed reserves and control reserve of fracture and cave reservoir are calculated and indicate, set up and carbonate rock
The corresponding well pattern form of the Karst Geological Landscape background of the fracture-pore reservoir of fracture hole, finally sets up the fracture hole type oil of carbonate rock fractured cave
The well pattern injection-production relation of Tibetan, and fracture-pore reservoir well pattern to carbonate rock fractured cave optimizes.As can be seen here, by the present invention
In method, can solve the problem that conventional flooding pattern construction method in fracture and vug carbonate reservoir unworthiness and not into
The problem of the ripe skewed pattern dispositions method for reflecting, for fracture-pore reservoir provides a set of applicable, perfect flooding pattern
Construction method, realize carries out well net deployment design to the unit without waterflooding extraction, and waterflooding extraction unit is noted
The effect of well net optimization adjustment is adopted, can effectively instruct the waterflooding extraction of fracture-pore reservoir to work.
Described above is only the general introduction of technical solution of the present invention, in order to better understand technological means of the invention,
And can be practiced according to the content of specification, and in order to allow the above and other objects of the present invention, feature and advantage can
Become apparent, below especially exemplified by specific embodiment of the invention.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 shows that the well pattern suitable for fracture and vug carbonate reservoir provided according to one embodiment of the invention builds
The flow chart of method；
Fig. 2 shows the well suitable for fracture and vug carbonate reservoir provided according to another specific embodiment of the invention
The flow chart of net construction method.
Fig. 3 is for system in Tahe Oilfield S74 fracture-cavity units flooding pattern optimum results schematic diagrames.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.Conversely, there is provided these embodiments are able to be best understood from the disclosure, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.
Fig. 1 shows that the well pattern suitable for fracture and vug carbonate reservoir provided according to one embodiment of the invention builds
The flow chart of method.As shown in figure 1, the method is comprised the following steps：
Step S110：The seam hole structure type of carbonate rock fractured cave is recognized, the difference according to seam hole structure type is to fracture hole
Structure is portrayed.
Specifically, carbonate rock fractured cave specifically includes the extremely strong Fracture System and cavern system of the anisotropism to be formed.Know
During the seam hole structure type of other carbonate rock fractured cave, specially recognize that carbonate rock fractured cave is belonging to above-mentioned Fracture System and still belongs to
In above-mentioned cavern system, and cavern system and the structure of Fracture System to above-mentioned identification is further recognized.If identification
Carbonate rock fractured cave belongs to above-mentioned cavern system, then the structure of the Carbonate Karst Cave is entered using corresponding geophysical method
The further outline identification of row；If identification carbonate rock fractured cave belongs to Fracture System, using corresponding geophysical method pair
The structure of the carbonate fracture carries out further crack identification, in then portraying carbonate rock fractured cave according to recognition result
Fissured structure in solution cavity structure and carbonate rock fractured cave.
Step S120：The fracture-cavity units inside connectivity structure incidence relation of seam hole structure is analyzed, fracture and cave reservoir company is set up
Logical structure.
Specifically, on the basis of carbonate rock fractured cave structure is identified and is portrayed, first using static communicating slits
Such as hole tracer technique is divided to the connectivity structure relation inside fracture-cavity units, then according to dynamic communication information, between well
The information such as interference information, production characteristic similarity information carry out dynamic connectivity checking to above-mentioned division result, and according to checking
Result sets up corresponding fracture and cave reservoir connectivity structure.
Step S130：Calculate and indicate the mining-employed reserves and control reserve of fracture and cave reservoir.
Specifically, on the basis of fracture and cave reservoir connectivity structure is set up, the size of mining-employed reserves is calculated, it is determined that having moved
With the characteristic distributions of remaining oil in reserves, after being in step (correspondence step S150) injection-production relation and flooding pattern structure
Foundation is provided；Meanwhile, by the distribution for indicating the control reserve scope of oil well to determine non-control reserve, after being in step
The deployment of (correspondence step S140) injection-production well provides foundation.
Step S140：Set up the flooding pattern form corresponding with the Karst Geological Landscape background of fracture and vug carbonate reservoir.
Specifically, because the injection-production well deployment of fracture-pore reservoir is irregular " Reservoir Body " with spatial stochastically distribution as base
Plinth is disposed, and due to the seam hole structure under different Karst Geological Landscape backgrounds, the scale of fracture and cave reservoir and seam
Connection situation of hole Reservoir Body etc. all has differences, therefore when flooding pattern form is set up, according to carbonate rock fractured cave type oil
Different Karst Geological Landscape backgrounds are hidden to set up corresponding flooding pattern form.Wherein, above-mentioned flooding pattern form includes planar well
The flooding pattern forms such as net, wire well pattern, banding well pattern.
Step S150：The well pattern injection-production relation of the fracture-pore reservoir of carbonate rock fractured cave is set up, and to carbonate rock fractured cave
Fracture-pore reservoir well pattern optimize.
Specifically, on the basis of corresponding flooding pattern form is set up, further according to the characteristics of fracture and cave reservoir, note
The features such as the type of the characteristics of mining height lower position relation, Reservoir Body space type difference, seam hole structure and Karst Geological Landscape background
To set up corresponding well pattern injection-production relation, then further so that plane is multidirectional, in the way of longitudinal multistage three-dimensional injection-production well is set up
Net, to improve the plane water drive control and longitudinal water drive control of flooding pattern, realizes the seam to carbonate rock fractured cave
The optimization of hole type reservoir well pattern and perfect.
As can be seen here, in the well pattern construction method suitable for fracture and vug carbonate reservoir provided in an embodiment of the present invention
In, can first by recognizing the seam hole structure type of carbonate rock fractured cave, and according to the seam hole structure type for being recognized not
Portrayed with to carbonate rock fractured cave structure, then analyze seam hole structure inside connectivity structure incidence relation, set up fracture hole storage
Collective's connectivity structure, and the mining-employed reserves and control reserve of fracture and cave reservoir are calculated and indicate, set up and carbonate rock fractured cave
Fracture-pore reservoir the corresponding flooding pattern form of Karst Geological Landscape background, finally set up the fracture hole type oil of carbonate rock fractured cave
The well pattern injection-production relation of Tibetan, and fracture-pore reservoir well pattern to carbonate rock fractured cave optimizes.Therefore, by the present invention
Method, can solve the problem that unworthiness of the conventional flooding pattern construction method in fracture and vug carbonate reservoir exploitation and existing
Some skewed pattern dispositions methods do not have the problem of maturation mirror property, for fracture-pore reservoir provide it is a set of applicable, perfect
Flooding pattern construction method, realize carries out well net deployment design to the unit without waterflooding extraction, to waterflooding extraction
Unit carries out the effect that flooding pattern is optimized and revised, and can effectively instruct the waterflooding extraction of fracture-pore reservoir to work.
Fig. 2 shows the well suitable for fracture and vug carbonate reservoir provided according to another specific embodiment of the invention
The flow chart of net construction method.As shown in Fig. 2 the method is comprised the following steps：
Step S201：Identification carbonate rock fractured cave structure type.
Specifically, the seam hole structure type of carbonate rock fractured cave specifically includes solution cavity structure and fissured structure, in identification
During the solution cavity structure of carbonate rock fractured cave, specially using amplitude gradient attribute and instantaneous energy attribute to above-mentioned solution cavity structure
Carry out outline identification.For example, for the outline identification that solution cavity body is isolated in solution cavity structure, because there is " beading " to reflect spy for it
Levy, and amplitude gradient attribute can reflect amplitude change rate, can effectively determine " beading " strong reflection with stratum reflection
Border, therefore the spatial distribution that " beading " of isolated solution cavity body reflects can be detected and is imaged using amplitude gradient attribute；Pin
To karst river, because the distribution that its distribution has fracture is oriented to, then can be belonged to according to amplitude gradient attribute and instantaneous energy
Property carries out outline identification to it.When fissured structure is recognized, the fissured structure is carried out using maximum curvature attribute specially
Crack identification.Wherein, maximum curvature attribute includes shape information, it is possible to distinguish the profile on tomography and surface, therefore can
Preferably to describe fracture and fissure channel profile in the plane, to realize recognizing the purpose of fissured structure.
Step S202：Difference according to seam hole structure type is portrayed carbonate rock fractured cave structure.
Specifically, when the seam hole structure to carbonate rock fractured cave is portrayed, it is directed to the solution cavity of carbonate rock fractured cave
Structure, specially on the basis of outline identification is carried out to it, further combined with maximum curvature attribute and coherence properties to upper
Stating solution cavity structure carries out the cluster analysis of earthquake solution cavity phase, extracts " beading " reflection related to solution cavity development, and it is right to realize
The detection and identification of solution cavity structure, and earthquake solution cavity is mutually portrayed with recognition result according to above-mentioned testing result；For
Fissured structure, on the basis of crack identification is carried out to it, further combined with stratigraphic dip and coherence properties counterincision crack structure
Seismic Fracture be mutually analyzed, extract the information related to crack, and the quarter of Seismic Fracture phase is carried out according to said structure
Draw.
Step S203：The seismic response of homogenous characteristics is sorted out, the multi-solution that reduction is released address characteristic solution, for
Seam hole structure is realized finely to recognize and portray.
Specifically, result is portrayed in step S202, the seismic response with homogenous characteristics is sorted out, example
Such as, the fissured structure of micro-fracture can show larger earthquake inclination value and less seismic coherence in earthquake geometric attribute
Property, therefore just the fissured structure of micro-fracture can be sorted out according to features described above, then the ground with homogenous characteristics is rung
Should carry out comprehensive analysis, realize to the further fine identification of seam hole structure and portray, for (correspondence step in subsequent step
S204 and step S205) can be divided inside fracture-cavity units on the basis for finely being recognized to seam hole structure and being portrayed
Connectivity structure incidence relation.
Step S204：Carry out static connection fracture hole to seam hole structure to follow the trail of, for realizing dividing the connection of fracture-cavity units inside
Structure connection relation.
Specifically, on the basis of fracture hole is finely recognized and portrayed, static company is further carried out to seam hole structure
Straight joint hole is followed the trail of, for example, static connection fracture hole is carried out to above-mentioned seam hole structure using ant body tracer technique follow the trail of, then will seam
The fracture-cavity units with connectivity structure are divided in same association well group in the structure of hole, to realize to the company inside fracture-cavity units
The division of logical structure connection relation.Wherein, an association well group just represents the seam hole structure with connected relation in static state.
Step S205：Dynamic connection is carried out to fracture-cavity units inside connectivity structure incidence relation using dynamic communication information
Checking, sets up fracture and cave reservoir connectivity structure.
Specifically, dynamic communication information include inter-well interference information, production characteristic similarity information, Flooding Characteristics information with
And tracer monitoring information.When dynamic connection checking is carried out to fracture-cavity units inside connectivity structure incidence relation, specially
According to interference information, production characteristic similarity information, Flooding Characteristics information and tracer monitoring letter between fracture-cavity units interior well
Cease to carry out dynamic connection checking, with the fracture-cavity units inside connection knot for determining to be divided in above-mentioned static connection fracture hole tracking
Structure incidence relation, then sets up fracture and cave reservoir connectivity structure according to above-mentioned determination result.
Step S206：Mining-employed reserves value is calculated, the distribution of Fuel Oil Remaining in mining-employed reserves is determined according to result of calculation
Feature, for providing foundation to set up well pattern injection-production relation and well pattern form.
Specifically, on the basis of analyzing fracture and cave reservoir connectivity structure, using in volumetric method calculating fracture and cave reservoir
The mining-employed reserves value of mining-employed reserves, in determining mining-employed reserves then in conjunction with the Flooding Characteristics in above-mentioned fracture and cave reservoir
The characteristic distributions of Fuel Oil Remaining, set up well pattern injection-production relation (correspondence step S209) and flooding pattern form in step after being
(correspondence step S208) provides foundation.
Step S207：The control reserve scope of control reserve is indicated, remaining non-control reserve is determined according to sign result
Characteristic distributions, so that the deployment for injection-production well provides foundation.
Specifically, to fracture and cave reservoir connectivity structure analyze on the basis of, due to fracture-pore reservoir with fracture hole storage for store up
Collection space, the syntagmatic of seam hole structure is complicated, therefore on the basis analyzed fracture and cave reservoir connectivity structure, further
The control reserve scope of control reserve is indicated, to determine the characteristic distributions of remaining non-control reserve, (correspondence step in step after being
Rapid S208) deployment of injection-production well provides foundation.
Step S208：Set up according to seam hole structure, the scale of fracture and cave reservoir and fracture and cave reservoir connectivity structure and carbon
The corresponding flooding pattern form of the Karst Geological Landscape background of the fracture-pore reservoir of Carbonate Rocks fracture hole.
Wherein, flooding pattern form includes planar well pattern, wire well pattern and banding well pattern.Specifically, different from routine
With the deployment way that " layer " is guidance in the deployment of clastic rock injection-production well, the deployment of fracture-pore reservoir injection-production well is with space
Disposed based on irregular " Reservoir Body " of random distribution, therefore when flooding pattern form is set up, due to difference
The connectivity structure of Karst Geological Landscape background seam hole structure, the scale of fracture and cave reservoir and fracture and cave reservoir all has differences, so
The flooding pattern form adaptable with it is set up for the different Karst Geological Landscape backgrounds of fracture-pore reservoir, for example, be directed to splitting
Seam especially development, and the development clear and definite situation in direction, can select using the flooding pattern form of wire well pattern.
Step S209：The note mining height lower position relation of reservoir space type and fracture-pore reservoir according to fracture and cave reservoir
Set up well pattern injection-production relation；The characteristics of Distribution Characteristics and seam hole structure according to fracture and cave reservoir, sets up well pattern injection-production relation.
Specifically, when well pattern injection-production relation is set up, first can according to the reservoir space type of fracture and cave reservoir and
The note mining height lower position relation of fracture-pore reservoir sets up well pattern injection-production relation, for example, being directed to crack-hole mainly to preserve sky
Between emergence karst, selection lower curtate position to " low note height adopt " of high-order bit water filling well pattern injection-production relation；For with crack-molten
Hole is the emergence karst of major reservoir spaces, and selection is noted from the crack that Reservoir Body development degree is differed to development degree solution cavity high
The well pattern injection-production relation of " the adopting in seam note hole " of water；And/or, it is also possible to according to the Distribution Characteristics and seam hole structure of fracture and cave reservoir
The characteristics of set up well pattern injection-production relation, for example, for the disconnected control karst compared with highly directive, in selection fracture belt edge water filling
Portion recover the oil " adopted in marginal not, stitch note hole adopt " well pattern injection-production relation；For underground river karst, multilayer is constituted with the solution cavity of large scale
Or branched underground river system, the solution cavity water filling of small scale, " the duck eye note that sweeping solution cavity recovers the oil should be selected in same underground river
Adopt in big hole " well pattern injection-production relation etc..
Step S210：Set up that plane is multidirectional, longitudinal multistage according to different flooding pattern form and well pattern injection-production relation
Three-dimensional flooding pattern.
Specifically, on the basis for different Karst Geological Landscape background constructing different injection production well arrangements forms and well pattern injection-production relation
Above, it is necessary to further optimize well pattern and set up three-dimensional flooding pattern, to realize plane water drive control higher and indulge
To water drive control.In specific implementation, when three-dimensional flooding pattern is set up, plane is specially set up multidirectional, longitudinal multistage
Three-dimensional flooding pattern, for example, in emergence karst and disconnected control karst background, the more injection-production well of preferential communication direction is used as oil
Well, to realize carrying out " multidirectional water filling " from multiple communication directions, the multidirectional displacement of plane is realized by water injection well, realizes higher putting down
Face water drive control；For underground river karst background, because the longitudinal direction of underground river karst has many set underground rivers, therefore " deep is used
Water filling, subsection water injection ", to set up the multistage displacement of karst river longitudinal direction, realizes longitudinal water drive control higher.
For example, system in Tahe Oilfield S74 fracture-cavity units are typical emergence karst geologic setting unit, the crack of development
Fracture hole space structure is set to become complex, unit switchs to waterflood stage after the product stage of building terminates.
Produced in early stage on the basis of the basic well pattern for building stage structure, 2 mouthfuls of water injection wells of deployment establish local irregularities' note and adopt
Well pattern.Because fracture-pore reservoir is with large scale crack as communicating passage so that the predominant pathway that note is adopted becomes apparent from, water filling
There is unidirectional displacement characteristics in well.And on the basis of existing well pattern, the control of fracture hole and development degree are low, injection-production well wet end
It is perfect.
Flooding pattern feature according to unit early stage, the construction method of space structure well pattern is adopted using note, multidirectional to set up
To adopt be target to note, builds " planar well pattern " form, it is considered to is not controlled and the spy such as mining-employed reserves distribution, connected relation, injection-production relation
Levy, carry out the perfect of flooding pattern.
Unit design note adopts 3 mouthfuls of completely penetrating well (first recover the oil after water filling), 3 mouthfuls of converted production well, stops noting Jing1Kou, injection-to-producing well ratio from
2:13 are changed into 7:8, water drive control is greatly improved.And according to being in unidirectional displacement feature after TK651CH metaideophones, implement
Runner adjusting process changes liquid Flow Field Distribution, adjustment stratum water filling distribution direction and sendout.Well after unit optimization design
Net distribution is shown in that Fig. 3, Fig. 3 are for system in Tahe Oilfield S74 fracture-cavity units flooding pattern optimum results schematic diagrames.
As can be seen here, in the well pattern construction method suitable for fracture and vug carbonate reservoir provided in an embodiment of the present invention
In, can first by recognizing the seam hole structure type of carbonate rock fractured cave, and according to the seam hole structure type for being recognized not
Portrayed with the seam hole structure to carbonate rock fractured cave, and the seismic response with homogenous characteristics can be sorted out, with reality
Fine identification existing to seam hole structure and portray；Then the fracture-cavity units inside connectivity structure incidence relation of seam hole structure is analyzed,
Set up fracture and cave reservoir connectivity structure, and calculate and sign fracture and cave reservoir mining-employed reserves and control reserve, set up and carbon
The corresponding flooding pattern form of the Karst Geological Landscape background of the fracture-pore reservoir of Carbonate Rocks fracture hole, finally sets up carbonate rock fractured cave
Fracture-pore reservoir well pattern injection-production relation, and carry out that plane is multidirectional, longitudinal direction to the fracture-pore reservoir well pattern of carbonate rock fractured cave
The three-dimensional optimization of multistage.Therefore, the method for being provided by the present invention can be realized being portrayed to dynamic optimization, from planar portions from static state
Affix one's name to three-dimensional structure, the space structure well pattern Constructed wetlands to multidirectional displacement are adopted from unidirectional note, for fracture-pore reservoir provides one
Construction method that set is applicable, perfect flooding pattern, while also achieve carrying out well pattern portion to the unit without waterflooding extraction
Administration's design, the effect that flooding pattern is optimized and revised is carried out to waterflooding extraction unit, can effectively instruct the note of fracture-pore reservoir
Water development.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple of the invention and show
Example property embodiment, but, without departing from the spirit and scope of the present invention, still can be directly true according to disclosure of invention
Determine or derive many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is it should be understood that and recognize
It is set to and covers all these other variations or modifications.
Additionally, although describing the present invention with particular order in the accompanying drawings implements operation, this is not required that or secretly
Showing must perform these operations according to the particular order, or the operation having to carry out shown in whole could realize desired knot
Really.Some steps can be omitted, multiple steps are merged into a step performs, or a step is divided into multiple steps and held
OK.
The method of the present invention and specific implementation method are described in detail above, and give corresponding implementation
Example.Certainly, in addition to the implementation, the present invention can also have other embodiment, all use equivalents or equivalent transformation shape
Into technical scheme, all fall within invention which is intended to be protected.
Claims (10)
1. a kind of flooding pattern construction method suitable for fracture and vug carbonate reservoir, it is characterised in that including：
Identification carbonate rock fractured cave structure type, the difference according to the seam hole structure type is carved to the seam hole structure
Draw；
The fracture-cavity units inside connectivity structure incidence relation of the seam hole structure is analyzed, fracture and cave reservoir connectivity structure is set up；
Calculate and indicate the mining-employed reserves and control reserve of the fracture and cave reservoir；
Set up the well pattern form corresponding with the Karst Geological Landscape background of the fracture and vug carbonate reservoir；
The well pattern injection-production relation of the fracture and vug carbonate reservoir is set up, and the fracture and vug carbonate reservoir well pattern is entered
Row optimization.
2. method according to claim 1, it is characterised in that the seam hole structure type includes：Solution cavity structure and split
Crack structure；
The identification carbonate rock fractured cave structure type, the difference according to seam hole structure type is portrayed the seam hole structure
The step of further include：
Outline identification is carried out to the solution cavity structure using amplitude gradient attribute and instantaneous energy attribute, and combines maximum curvature
Attribute and coherence properties carry out the cluster analysis of earthquake solution cavity phase to the solution cavity structure, and the earthquake solution cavity is mutually carved
Draw；
Crack identification is carried out to the fissured structure using maximum curvature attribute, with reference to stratigraphic dip and coherence properties to described
Fissured structure carries out portraying for Seismic Fracture phase.
3. method according to claim 1, it is characterised in that in the identification carbonate rock fractured cave structure type, according to
After the difference of the seam hole structure type is portrayed the seam hole structure, methods described is further included：By similar spy
The seismic response levied is sorted out, the multi-solution that reduction is released geology characteristic solution, for realizing fine knowledge to the seam hole structure
Not and portray.
4. method according to claim 3, it is characterised in that connect inside the fracture-cavity units of the analysis seam hole structure
Logical structure connection relation, includes the step of set up fracture and cave reservoir connectivity structure：
Carry out static connection fracture hole to the seam hole structure to follow the trail of, for realizing that dividing fracture-cavity units inside connectivity structure closes
Connection relation；
Dynamic connection checking is carried out to fracture-cavity units inside connectivity structure incidence relation using dynamic communication information, is set up
Fracture and cave reservoir connectivity structure.
5. the method according to claim 1 or 4, it is characterised in that the calculating and indicate the fracture and cave reservoir
The step of mining-employed reserves and control reserve, includes：
The mining-employed reserves value is calculated, according to the characteristic distributions of Fuel Oil Remaining in result of calculation determination mining-employed reserves, for
Foundation is provided to set up well pattern injection-production relation and well pattern form；
The control reserve scope of the control reserve is indicated, the characteristic distributions of remaining non-control reserve is determined according to sign result,
So that the deployment for injection-production well provides foundation.
6. method according to claim 5, it is characterised in that the rock of the foundation and the fracture and vug carbonate reservoir
The step of molten geologic setting corresponding well pattern form, further includes：
According to the seam hole structure, the scale of the fracture and cave reservoir and the fracture and cave reservoir connectivity structure set up with it is described
The corresponding flooding pattern form of the Karst Geological Landscape background of the fracture-pore reservoir of carbonate rock fractured cave.
7. method according to claim 1, it is characterised in that the well pattern for setting up the fracture and vug carbonate reservoir
The step of injection-production relation, includes：
The note mining height lower position relation of reservoir space type and the fracture-pore reservoir according to the fracture and cave reservoir is set up
Well pattern injection-production relation；The characteristics of Distribution Characteristics and the seam hole structure according to the fracture and cave reservoir, sets up well pattern note and adopts pass
System.
8. the method according to claim 1 or 7, it is characterised in that described to the fracture and vug carbonate reservoir well pattern
The step of optimizing includes：
Set up that plane is multidirectional, longitudinal multistage three-dimensional injection-production well according to different flooding pattern form and well pattern injection-production relation
Net.
9. method according to claim 6, it is characterised in that the flooding pattern form includes：Planar well pattern, wire well
Net and banding well pattern.
10. method according to claim 4, it is characterised in that the dynamic communication information includes：Inter-well interference information,
Production characteristic similarity information, Flooding Characteristics information and tracer monitoring information.
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| PB01 | Publication | ||
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Application publication date: 20170524 |