CN106354895A - Inter-layer crossing modeling method of fault block oil reservoir multilayer sandstone reservoirs - Google Patents
Inter-layer crossing modeling method of fault block oil reservoir multilayer sandstone reservoirs Download PDFInfo
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Abstract
The invention provides an inter-layer crossing modeling method of fault block oil reservoir multilayer sandstone reservoirs. The method comprises the steps that fine division and comparison of the reservoirs are performed according to the rule of standard layer control and sedimentary cycle comparison, and a well point reservoir single sand body fine comparison and division result is obtained; a well point reservoir single sand body layering database is built, the single sand body layering data are taken as a constraint condition, a single sand body small layer plane graph is drawn, each single sand body reservoir plane distribution law is determined, and further a single sand body reservoir plane thickness isogram is compiled; a reservoir model is subjected to quality control, whether local part of the reservoir model is abnormal is checked by checking the reservoir plane characteristics and section characteristics, a reservoir crossing phenomenon occurs, and the reason causing the reservoir crossing is found out; different solutions are taken according to different influence factors. The inter-layer crossing modeling method of the fault block oil reservoir multilayer sandstone reservoirs is clear in thought and simple in application and lays a firm foundation for reservoir property simulation.
Description
Technical field
The present invention relates to the accurate reservoir description field in oil development, especially relate to fault block oil reservoir multilamellar sandstone reservoir
Interlayer wears a layer modeling method.
Background technology
Three-dimensional geological modeling has become the key link that in oil field development, oil reservoir is carried out with meticulous pool description at present.Oil reservoir ground
The flow process of matter modeling mainly includes the foundation of tectonic model, reservoir model and attribute model.The foundation of reservoir model is geology
The important step that model is set up.It is many that SHENGLI PETROLEUM AREA fault block oil reservoir has a tomography, and fracture system is complicated, oil-containing in longitudinal direction
Feature more than well section length, reservoir development, subdivision substratum, adopts the foundation of such oil reservoir model of current development late stage more
Definitiveness thickness overlay modeling method, the GEOLOGICAL MODELS OF PETROLEUM RESERVOIR that the method is set up is high with the matching degree of geological knowledge, but
Local well control degree is poor, near Faults region and reservoir aplasia area, often occurs that longitudinally upper reservoir levels wear layer
Fight, construction face is abnormal etc., reservoir local " sedimentary break " in plane, the connective phenomenon being deteriorated, and then have impact on
The convergence effect of the precision of geological model and numerical simulation.In order to realize the foundation of the high reservoir model of precision degree, solution
Certainly reservoir interlayer wears the problem of layer, needs using new method, to ensure that reservoir model is maximum with geological knowledge
Unanimously.We have invented fault block oil reservoir multilamellar sandstone reservoir interlayer for this and wear a layer modeling method, solve above technical problem.
Content of the invention
It is an object of the invention to provide fault block oil reservoir multilamellar sandstone reservoir interlayer wears a layer modeling method, solve reservoir model and set up
The local anomaly problem occurring on process midplane and longitudinal direction, is the foundation of reservoir model and the research of remaining oil distribution
Lay the foundation.
The purpose of the present invention can be achieved by the following technical measures: fault block oil reservoir multilamellar sandstone reservoir interlayer wears layer modeling side
Method, this fault block oil reservoir multilamellar sandstone reservoir interlayer is worn a layer modeling method and is included: step 1, according to " index bed controls, deposition
The principle of cycle contrast ", carries out reservoir elaborate division contrast, obtains well point reservoir single sand body fine correlation division result；
Step 2, sets up well point reservoir single sand body hierarchical data base, with single sand body individual-layer data as constraints, draws single sand body little
Layer plane figure, determines each single sand body reservoir planar distribution rule, and then compilation single sand body reservoir planar thickness isopleth map；Step
Rapid 3, quality control is carried out to reservoir model, by reservoir plane characteristic and profile features inspection, checks office in reservoir model
Whether portion has exception, the phenomenon that reservoir wears layer, and the reason judge to cause reservoir to wear layer；Step 4, is judging to cause
On the basis of reservoir model wears layer reason, for different influence factors, take different solutions.
The purpose of the present invention also can be achieved by the following technical measures:
In step 1, the principle according to " index bed controls, the cycle of sedimentation contrasts ", first, multi-direction foundation contrasts bone
Frame, forms multiple spot in plane, longitudinal direction upper multistage control, to ensure the contrast unification in point-line-face；Secondly, many well groups close
Set up contrast section, set up complete contrast section it is ensured that the reasonability of well point single sand body reservoir correlation and reliability, enter
And set up reservoir single sand body hierarchical data base.
In step 2, on the basis of setting up well point reservoir single sand body hierarchical data base, with well point reservoir single sand body in longitudinal direction
Individual-layer data is material point, using seismic interpretation structure face as construction trend containment surfaces, sets up single sand body reservoir top interface,
The bottom interface of single sand body reservoir is determined by the way of adding up in thickness face；In plane, by the planar distribution rule of Study In Reservoir
Rule, determines the pinch-out boundary of reservoir single sand body, with the pinch-out boundary of reservoir single sand body as control line in plane, draws each single sand body
Sand thickness isopleth map, longitudinally upper with single sand body top bottom interface for controlling, built using the method that deterministic thickness is superimposed
The fine Skeleton Model of vertical reservoir single sand body.
In step 3, quality control is carried out to model, checked by reservoir plane characteristic, check reservoir planar distribution
Whether consistent with geological knowledge, whether local wears layer, and is to be caused by local reservoir phase transformation pinching at judging to wear layer, also
It is regional area well pattern imperfection, well control degree difference causes；By crossing well profile flag check, check well point individual-layer data
Whether mate completely with construction face, whether tomography is reasonable with the bonding relation of reservoir, and near Faults be whether there is and broken due to well
Mistake causes reservoir interlayer to wear layer.
In step 4, wear a layer problem for the reservoir interlayer finding in step 3, propose corresponding solution；To due to
Local reservoir phase transformation pinching, lacks reservoir data and causes and wear a layer problem, mends layer method using pinching, according to deposition rule, closes
Reason prediction do not bore meet sand body well the top bottom surface data with the mud stone of this sand body " synsedimentary unit " it is ensured that reservoir model " no
Intersect "；To due to well pattern imperfection, well control low degree causes the region wearing layer, using adding virtual log method, is wearing layer
Position, artificially adds virtual log, increases well point bound data；Cause tomography attached to losing disappearance well point data because tomography is disconnected
Closely wear a layer problem, using reservoir thickness control methods, instruct the thickness face near Faults reservoir to control using deposition rule
System, reasonable prediction thickness changing trend, it is ensured that tomography is rationally overlapped with reservoir, occurs without and wears a layer phenomenon.
The fault block oil reservoir multilamellar sandstone reservoir interlayer of the present invention wears a layer modeling method, is on the basis of fine geological study,
According to Detailed Geologic Research Results, plane determines each single sand body planar distribution rule, longitudinally with each single sand body top bottom slice number
According to for controlling, longitudinal multilamellar sandstone reservoir sedimentation model is set up using the definitiveness thickness addition method, layer is worn for reservoir interlayer
Problem, mend layer method, add virtual log method and near Faults reservoir thickness control methods and solve using reservoir pinching.With
Relied primarily on Method of Stochastic in the past and set up reservoir model and compared, the method efficiently solved multilamellar sandstone interlayer and wears layer
Problem is it is ensured that the concordance of reservoir sedimentation model and geological knowledge.Fault block oil reservoir multilamellar sandstone reservoir layer in the present invention
Between wear a layer modeling method, technical thought understands, apply simple, is that solid foundation has been established in reservoir attribute simulation.
Brief description
Fig. 1 wears, for fault block oil reservoir multilamellar sandstone reservoir interlayer of the present invention, the flow process that layer modeling method is applied to a specific embodiment
Figure；
Fig. 2 is the target area single sand body comparison diagram in a specific embodiment of the present invention；
Fig. 3 is the single sand body sea level changes rule figure in an instantiation of the present invention；
Fig. 4 is the single sand body thickness isopleth map in an instantiation of the present invention；
Fig. 5 is the reservoir single sand body model in an instantiation of the present invention；
Fig. 6 is that the western reservoir being embodied as in example of the present invention wears layer figure；
Fig. 7 is that the middle part reservoir being embodied as in example of the present invention wears layer figure；
Fig. 8 is that the near Faults reservoir in an instantiation of the present invention wears a layer profile；
Fig. 9 is the near Faults reservoir plane graph in an instantiation of the present invention；
Figure 10 is that the western virtual log that adds in target area in an instantiation of the present invention controls reservoir thickness figure；
Figure 11 mends layer for reservoir pinching in the middle part of the target area in an instantiation of the present invention and controls reservoir thickness figure；
Figure 12 is that the near Faults formation thickness in an instantiation of the present invention controls reservoir thickness figure.
Specific embodiment
Above and other objects, features and advantages for enabling the present invention become apparent, cited below particularly go out preferred embodiment,
And coordinate shown in accompanying drawing, it is described in detail below.
As shown in figure 1, the flow chart that the fault block oil reservoir multilamellar sandstone reservoir interlayer that Fig. 1 is the present invention wears layer modeling method.
In a step 101, by fine Strata Comparison, determine the top bottom interface of each single sand body, set up single sand body individual-layer data
Storehouse.In one embodiment, using geology, well logging, well logging, seismic data, the data such as dynamic, according to " index bed control
The principle of system, cycle of sedimentation contrast ", considers the many factors such as construction, the cycle of sedimentation, sedimentary facies, oil water relation comprehensively,
Determine the reasonable layering boundary of each single sand body, set up single sand body hierarchical data base.Fig. 2 is in a specific embodiment of the present invention
Target area single sand body comparison diagram.Flow process enters into step 102.
In a step 102, on the basis of setting up well point reservoir single sand body hierarchical data base, it is about with single sand body individual-layer data
Bundle condition, determines each single sand body planar distribution rule.With single sand body top bottom interface as control condition on longitudinally, using determination
Property thickness stacking method sets up the fine Skeleton Model of each monolayer of reservoir.In one embodiment, according to the single sand body pair set up
Ratio data, in plane, by the planar distribution rule of Study In Reservoir, determines the pinch-out boundary of reservoir single sand body, with reservoir list
The pinch-out boundary of sand body is control line, draws the sand thickness isopleth map of each single sand body.In longitudinal direction, the top bottom surface with single sand body is
Chain of command, the method using thickness superposition establishes target area single sand body model.Fig. 3 is in an instantiation of the present invention
Single sand body sea level changes rule figure according to the determination of single sand body comparing result is it is determined that the range of deposition of single sand body, black in Fig. 3
On color solid line carry triangle line be sand body pinch-out boundary, to the east of pinch-out boundary be sand body deposit, to the west of for mud stone deposit,
Sand body is not developed.Fig. 4 is single sand body thickness drawn for control line with sand body pinch-out boundary in an instantiation of the present invention etc.
Value figure.Fig. 5 is the single sand body model of the target area that the employing thickness addition method in an instantiation of the present invention is set up.Flow process
Enter into step 103.
In step 103, quality control is carried out to the reservoir single sand body model set up, check that a layer feelings worn by reservoir single sand body model
Condition.Specifically, in one embodiment, in figure 6, checked by reservoir plane characteristic, find western in target area,
Well control degree ratio is relatively low, lacks well point Data Control, leads to reservoir model to wear layer.In the figure 7, fault block in the middle part of target area
Area, 3-57 well and forever 3-141 Jing Chu forever, due to reservoir phase transformation pinching, well point lacks sand body data, leads to this two mouthfuls of Jing Jing
Area occurs wearing floor situation.In fig. 8, by crossing well profile flag check, in 3- side 18 wellblock near Faults and forever 3-47 forever
Wellblock near Faults are broken due to well point and lose, and structural anomaly leads to reservoir to wear layer.Fig. 6 is in an instantiation of the present invention
Target area western part reservoir thickness wears layer figure, and Fig. 7 wears layer for reservoir pinching in the middle part of the target area in an instantiation of the present invention
Figure, Fig. 8 is the near Faults reservoir abnormal profile figure in an instantiation of the present invention, and Fig. 9 is a concrete reality of the present invention
Near Faults reservoir plane graph in example.Flow process enters into step 104.
At step 104, a layer phenomenon worn by reservoir single sand body model pattern checking in step 103 being occurred, for different
Influence factor, takes different processing methods.From the point of view of specifically, in Fig. 10, drawn by target area western part well control low degree
The reservoir rising wears a layer problem, using adding virtual log method, in Chuan Ceng area, with the addition of two mouthfuls of virtual log well 1 and well2,
According to construction trend, fill up virtual log individual-layer data as constraints, solve to wear a layer phenomenon.In fig. 11, in 3-57 forever
Well and forever 3-141 wellblock, wear a layer problem by the reservoir that reservoir phase transformation pinching causes, and mend layer method using pinching, are become according to construction
Gesture, in conjunction with deposition rule during reservoir etc., artificially replenishes the mud stone layering boundary of same time deposition, as model constraints,
To solve to wear a layer phenomenon.In fig. 12, broken by near Faults well and lose the reservoir that causes and wear a layer problem, attached by adjusting tomography
Near reservoir thickness, solves near Faults reservoir and wears a layer problem.Figure 10 is the target area west in an instantiation of the present invention
Portion adds virtual log and controls reservoir thickness figure, and Figure 11 mends for reservoir pinching in the middle part of the target area in an instantiation of the present invention
Layer controls reservoir thickness figure, and Figure 12 is that the near Faults formation thickness in an instantiation of the present invention controls reservoir thickness figure.
The technology of the present invention thinking understands, applies simply, is that reservoir model is set up and numerical simulation study is laid a good foundation,
Lay a good foundation for remaining oil distribution research, high water-cut reservoir is taped the latent power further, improve recovery ratio risen vital
Effect.The method obtains application, such as Yonganzhen oilfield 3-1 fault block, spring scenery oil field row forever in the multiple fault block oil reservoir of Shengli Oil Field
2 fault blocks and justice and eastern oil field are stained with more than 10 fault block such as 4 fault blocks.The subtle three-dimensional geological model output set up by said method
Ecl model, the numerical simulation study in the area that conducts a research.Block pressure, cumulative oil production, moisture content, day oil-producing can be made
All in the range of error allows, coincidence rate reaches more than 95% to every fitting index such as amount, the moisture content matching symbol of block individual well
Conjunction rate more than 90%, reaches reservoir engineering required precision, is laying the foundation of residual oil quantitative description.This invention is practical,
Remarkable in economical benefits, has good popularizing application prospect.
Claims (5)
1. fault block oil reservoir multilamellar sandstone reservoir interlayer wears layer modeling method it is characterised in that this fault block oil reservoir multilamellar sandstone reservoir layer
Between wear a layer modeling method and include:
Step 1, according to the principle of " index bed controls, the cycle of sedimentation contrasts ", carries out reservoir elaborate division contrast, obtains well point
Reservoir single sand body fine correlation division result；
Step 2, sets up well point reservoir single sand body hierarchical data base, with single sand body individual-layer data as constraints, draws single sand body little
Layer plane figure, determines each single sand body reservoir planar distribution rule, and then compilation single sand body reservoir planar thickness isopleth map；
Step 3, carries out quality control to reservoir model, by reservoir plane characteristic and profile features inspection, checks in reservoir model
Whether local has exception, the phenomenon that reservoir wears layer, and the reason judge to cause reservoir to wear layer；
Step 4, on the basis of judging to cause reservoir model to wear layer reason, for different influence factors, takes different solutions
Method.
2. fault block oil reservoir multilamellar sandstone reservoir interlayer according to claim 1 wears layer modeling method it is characterised in that in step
In rapid 1, according to the principle of " index bed controls, the cycle of sedimentation contrasts ", first, multi-direction foundation contrasts skeleton, is formed
In multiple spot in plane, longitudinal direction, multistage controls, and is unified with the contrast ensureing point-line-face；Secondly, many well groups build vertical contrast jointly
Section, sets up complete contrast section it is ensured that the reasonability of well point single sand body reservoir correlation and reliability, and then sets up storage
Layer single sand body hierarchical data base.
3. fault block oil reservoir multilamellar sandstone reservoir interlayer according to claim 1 wears layer modeling method it is characterised in that in step
In rapid 2, on the basis of setting up well point reservoir single sand body hierarchical data base, with well point reservoir single sand body individual-layer data in longitudinal direction
For material point, using seismic interpretation structure face as construction trend containment surfaces, set up single sand body reservoir top interface, using thickness
The mode adding up in degree face determines the bottom interface of single sand body reservoir；In plane, by the planar distribution rule of Study In Reservoir, really
Determine the pinch-out boundary of reservoir single sand body, with the pinch-out boundary of reservoir single sand body as control line in plane, draw the sand body of each single sand body
Thickness isopleth map, with single sand body top bottom interface for controlling in longitudinal direction, the method using the superposition of deterministic thickness sets up reservoir
The fine Skeleton Model of single sand body.
4. fault block oil reservoir multilamellar sandstone reservoir interlayer according to claim 1 wears layer modeling method it is characterised in that in step
In rapid 3, quality control is carried out to model, checked by reservoir plane characteristic, check that reservoir planar distribution is recognized with geology
Know whether consistent, whether local wears layer, and be to be caused by local reservoir phase transformation pinching at judging to wear layer, or partial zones
Domain well pattern imperfection, well control degree difference causes；By crossing well profile flag check, check well point individual-layer data and construction face
Whether mate completely, whether tomography is reasonable with the bonding relation of reservoir, near Faults whether there is and cause storage due to the disconnected mistake of well
Layer is worn between layer by layer.
5. fault block oil reservoir multilamellar sandstone reservoir interlayer according to claim 4 wear layer modeling method it is characterised in that
In step 4, wear a layer problem for the reservoir interlayer finding in step 3, propose corresponding solution；To due to local
Reservoir phase transformation pinching, lacks reservoir data and causes and wear a layer problem, mends layer method using pinching, according to deposition rule, rationally in advance
Survey and do not bore the top bottom surface data with the mud stone of this sand body " synsedimentary unit " meeting sand body well it is ensured that reservoir model " is not handed over
Fork "；To due to well pattern imperfection, well control low degree causes the region wearing layer, using adding virtual log method, wearing a layer position,
Artificial interpolation virtual log, increases well point bound data；Near Faults are caused to wear layer to losing disappearance well point data because tomography is disconnected
Problem, using reservoir thickness control methods, instructs the thickness face near Faults reservoir to be controlled using deposition rule, closes
Reason thickness prediction variation tendency, it is ensured that tomography is rationally overlapped with reservoir, occurs without and wears a layer phenomenon.
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| CN112505760A (en) * | 2020-10-15 | 2021-03-16 | 中国石油天然气股份有限公司 | Dissolved-fluid reservoir depicting method based on virtual well |
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| CN112394404A (en) * | 2020-12-14 | 2021-02-23 | 中国海洋石油集团有限公司 | Progressive reservoir fine characterization method |
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