CN110501743A - A kind of sandstone thickness isogram preparation method of reservoir architecture constraint - Google Patents
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Abstract
The present invention relates to a kind of sandstone thickness isogram preparing methods of reservoir architecture constraint, comprising the following steps: step 1: reservoir architecture dividing elements, comprising: 1) reservoir architecture interface is predicted；2) reservoir architecture Interface classification；3) reservoir architecture interface combinations；Step 2: the sandstone thickness isogram establishment in reservoir architecture unit, comprising: 1) data preparation；2) the sandstone thickness interpolation of seismic properties constraint well point；Step 3: sandstone thickness isogram generates, comprising: 1) analyzes the development period of neighbouring configuration unit；2) sand thickness isogram overlaps.The present invention is using configurational unit as compilation unit, introduce the information such as the structural relation inside subsurface reservoir, it can effectively reflect the true spread situation of sandstone thickness, the limitation of thickness between sandstone reservoir enveloping surface can only be reflected by breaching traditional sandstone thickness isogram, can effectively instruct Fine Reservoir quality evaluation.
Description
Technical field
The present invention relates to clastic rock oil reservoir development technical fields, especially with regard to a kind of sandstone thickness of reservoir architecture constraint
Isogram preparation method.
Background technique
River and delta reservoir are important oil and gas reservoir type, and the petroleum-in-place contained accounts for China and visited
The 79% of bright and investment exploitation the total oil in place of clastic rock.For such reservoir during sedimentary evolution, the same period is not secondary and different
The sand body of microfacies corrodes in space to be stacked, and is caused the structural relation inside reservoir complicated and changeable, is hindered the migration of oil gas water.With oil
The raising year by year of field Exploitation degree, geologist gradually recognize that reservoir architecture is the important content for developing geological research.
In recent years, reservoir architecture research obtains incremental advances.It is the Eastern China old filed benefit of representative with the triumph of big Khanh Hoa
With dense well pattern data, in conjunction with certain seismic data and Production development data, the level for carrying out configurational unit is divided and boundary is known
Not, the configuration method for decomposing refined step by step is established, and achieves good application effect in oil field development.
But the still aobvious weakness of reservoir quality evaluation research based on reservoir architecture.As reservoir quality evaluation at
One of fruit carrier, current reservoir parameter isogram, especially sandstone thickness isogram be still with oily (sand) group, substratum or
Single sand body is that unit is worked out.Such sandstone thickness isogram essence is the comprehensive of thickness between the enveloping surface of sandstone reservoir top bottom
Close reflection, be the planar distribution feature of sandstone thickness in a certain geologic(al) period, cannot embody inside reservoir various configuration unit it
Between syntagmatic and stacked pattern.Therefore, current sandstone thickness isogram is difficult to effectively instruct fine reservoir quality
Evaluation.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of sandstone thickness isogram establishments of reservoir architecture constraint
Method.
To achieve the above object, the present invention takes following technical scheme: a kind of sandstone thickness of reservoir architecture constraint is equivalent
Line chart preparation method, comprising the following steps:
Step 1: reservoir architecture dividing elements, comprising: 1) reservoir architecture interface is predicted；2) reservoir architecture Interface classification；3)
Reservoir architecture interface combinations；
Step 2: the sandstone thickness isogram establishment in reservoir architecture unit, comprising: 1) data preparation；2) earthquake category
Property constraint well point sandstone thickness interpolation；
Step 3: sandstone thickness isogram generates, comprising: 1) analyzes the development period of neighbouring configuration unit；2) sand body
Depth isoline graph overlapping.
The sandstone thickness isogram preparation method, it is preferred that the detailed process of the reservoir architecture interface prediction
Are as follows: pure wave seismic data is utilized, the sensitive earthquake category for being able to reflect reservoir plane discontinuity is extracted within the scope of research layer position
Property, position, that is, reservoir architecture interface development position of attribute value exception；
The detailed process of the reservoir architecture Interface classification are as follows: according to above-mentioned reservoir architecture interface prediction result, in conjunction with storage
Reservoir architecture boundary division for pinching type, contact-type and is cut stack-type three classes by response characteristic of the layer on seismic profile；
The detailed process of the reservoir architecture interface combinations are as follows:, will be adjacent in conjunction with the geometric shape of reservoir architecture unit
Reservoir architecture interface is combined, and realizes reservoir architecture dividing elements.
The sandstone thickness isogram preparation method, it is preferred that the sensitive earthquake attribute includes curvature body or ant
Ant body.
The sandstone thickness isogram preparation method, it is preferred that the pinching type is characterized in that sand body is inlayed in isolation
In mud stone, sand thickness is gradually thinning and pinching, adjacent sand body do not contact each other；
The contact-type is characterized in that two neighboring sand body laterally contacts, edge is overlapped, but is not connected between sand body；
The stack-type of cutting is characterized in that two neighboring sand body is laterally stacked, and it is late that sand thickness, which increases, seismic response enhances
Phase sand body corrodes early stage sand body stacked result.
The sandstone thickness isogram preparation method, it is preferred that common river and delta facies configurational unit
Geometric shape includes: the point bar of meandering stream due to being transformed by later period river, and mostly in subcircular or nearly ellipse, multiple point bars are along the river
The arrangement of road spreading direction；The channel bar of braided stream assumes diamond in shape more or spindle, is held between braided channel；The distributary river of delta
Road is in band-like spread along water (flow) direction；Potato shape or ellipticity is then presented in the estuary dam of delta, is distributed in distributary channel
The front or two sides of end.
The sandstone thickness isogram preparation method, it is preferred that the detailed process of the data preparation are as follows: reservoir structure
Sandstone thickness isogram establishment in type unit needs two class data, including the sandstone thickness and reflection sandstone thickness at well point
Seismic properties: a) sandstone thickness at well point is obtained by the lithology of well log interpretation；B) reflect the seismic properties of sandstone thickness
Using amplitude generic attribute.
The sandstone thickness isogram preparation method, it is preferred that for cutting in stack-type reservoir architecture bounds
Well is formed due to being that more phase sand bodies are stacked, should by the sandstone thickness at well point according to the sand body phase time carry out it is vertical split point, split point
Foundation is that natural gamma GR or natural potential SP curve are obviously return to shale line, return amplitude >=50%.
The sandstone thickness isogram preparation method, it is preferred that the sandstone thickness of seismic properties constraint well point
The detailed process of interpolation are as follows: 1. as unit of a certain reservoir architecture unit, by the coordinate of well point within the scope of its, sandstone thickness and
Reflect that the seismic properties of sandstone thickness import 2017 software platform of Petrel E&P Software Platform；2. using should
Make surface function under software platform Stratigraphy module, to reflect that the seismic properties of sandstone thickness constrain,
And interpolation is carried out using well point sandstone thickness, generate the sand thickness isogram in the reservoir architecture unit；3. repeating above-mentioned
1. and 2. step, generates the sand thickness isogram in other reservoir architecture units.
The sandstone thickness isogram preparation method, it is preferred that the development of the analysis neighboring reservoirs configurational unit
The detailed process of phase time are as follows: using the flooding mud stone at the top of short-term or short-term cyclical sequences as isochronic plane, utilize different reservoir configuration
The depth displacement of cell distance isochronic plane determines adjacent storage in conjunction with seismic data to the indicative function of reservoir architecture haplophase time
The development period of layer configurational unit.
The sandstone thickness isogram preparation method, it is preferred that the sand thickness isogram overlaps specific
Process are as follows: according to the development period of above-mentioned neighboring reservoirs configurational unit, early stage reservoir architecture unit is under, advanced stage reservoir architecture list
Member overlaps the sandstone thickness isogram in different reservoir configurational unit upper, generates the sandstone thickness of reservoir architecture constraint
Isogram.
The invention adopts the above technical scheme, which has the following advantages: the present invention using configurational unit as compilation unit,
The information such as the structural relation inside subsurface reservoir are introduced, can effectively reflect the true spread situation of sandstone thickness, breach
Traditional sandstone thickness isogram can only reflect the limitation of thickness between sandstone reservoir enveloping surface, can effectively instruct Fine Reservoir
Quality evaluation.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is the sensitive earthquake attributed graph extracted in the embodiment of the present invention；
Fig. 3 is the seismic response sectional view at pinching type configuration interface in the embodiment of the present invention；
Fig. 4 is the seismic response sectional view at contact-type configuration interface in the embodiment of the present invention；
Fig. 5 is the seismic response sectional view that stack-type configuration interface is cut in the embodiment of the present invention；
Fig. 6 is the flat distribution map at reservoir architecture interface in the embodiment of the present invention；
Fig. 7 is reservoir architecture cell distribution figure in the embodiment of the present invention；
Fig. 8 is to cut in stack-type reservoir architecture bounds that sandstone thickness splits a point schematic diagram at well point in the embodiment of the present invention；
Fig. 9 is the sandstone thickness isogram of reservoir architecture unit 4 in the embodiment of the present invention；
Figure 10 is the development period relational graph of reservoir architecture unit 2 and 4 in the embodiment of the present invention；
Figure 11 is the sandstone thickness isogram that reservoir architecture constrains in the embodiment of the present invention.
Specific embodiment
Presently preferred embodiments of the present invention is described in detail below with reference to attached drawing, it is of the invention to be clearer to understand
Objects, features and advantages.It should be understood that embodiment shown in the drawings does not limit the scope of the present invention, and only it is
Illustrate the connotation of technical solution of the present invention.
It is described further below using the A sand body in the Eastern China Bohai Sea oil field Q as embodiment, the A sand body in the oil field Q is bent
Flow river deposition.
As shown in Figure 1, a kind of sandstone thickness isogram preparation method for reservoir architecture constraint that the present embodiment proposes, packet
Include following steps:
Step 1: reservoir architecture dividing elements:
1) reservoir architecture interface is predicted: using the pure wave seismic data in the oil field Q, in two seismic horizons in top, bottom of A sand body
Between extract curvature body attribute, the positions of curvature anomalies, that is, reservoir architecture interface development position (as shown in Figure 2).
2) coarse layer configuration Interface classification: according to above-mentioned reservoir architecture interface prediction result, in conjunction with reservoir on seismic profile
Response characteristic, configuration boundary division will be facilitated to be pinching type, contact-type and cut stack-type three classes.
As shown in figure 3, pinching type is characterized in that sand body is embedded in mud stone in isolation, sand thickness is gradually thinning and sharp
It goes out, adjacent sand body does not contact each other；As shown in figure 4, contact-type is characterized in that two neighboring sand body laterally contacts, edge overlaps,
But it is not connected between sand body；As shown in figure 5, cutting stack-type is characterized in that two neighboring sand body is laterally stacked, sand thickness increase, earthquake
Response enhancing is that advanced stage sand body corrodes early stage sand body stacked result.
Wherein, again to stack-type is cut from pinching type to contact-type, sand body is stacked degree and is gradually increased.Pinching type and contact-type circle
The sand body of face two sides is underlapped, shows as a line in the plane；And the sand body for cutting stack-type interface two sides is overlapped, interface
Essence is a band, shows as approximately parallel two lines in the plane.
According to reservoir architecture interface prediction result, in conjunction with the seismic response features at different type configuration interface, by the oil field Q
The configuration interface of A sand body is classified, and type and distribution are as shown in Figure 6.
3) reservoir architecture interface combinations: according to the geometric shape of reservoir architecture unit, by adjacent reservoir architecture interface into
Row combination, realizes reservoir architecture dividing elements.
Wherein, the geometric shape of common river and delta reservoir configurational unit includes: (compound) point of meandering stream
Dam is mostly arranged in subcircular or nearly ellipse, multiple (compound) point bars along river spreading direction due to being transformed by later period river；Pigtail
The channel bar in shape river assumes diamond in shape more or spindle, is held between braided channel；(underwater) distributary channel of delta is along water flow side
To in band-like spread；Potato shape, ellipticity is then presented in the estuary dam of delta, be distributed in distributary channel end front or
Two sides.
The A sand body in the oil field Q is meandering river facies deposition in the present embodiment, according to (compound) point bar in subcircular or nearly ellipse
The characteristics of, neighboring reservoirs configuration interface is combined, 9 reservoir architecture units of A sand body is obtained, cuts stack-type reservoir architecture circle
Face indicates its outer, inner boundary (as shown in Figure 7) respectively with solid line and dotted line.
Step 2: the sandstone thickness isogram establishment in reservoir architecture unit:
1) data preparation: the sandstone thickness isogram establishment in reservoir architecture unit needs two class data, including well point
The sandstone thickness at place and the seismic properties of reflection sandstone thickness:
A) sandstone thickness at well point is obtained by the lithology of well log interpretation.For cutting in stack-type reservoir architecture bounds
Well, formed due to being that more phase sand bodies are stacked, should by well point thickness according to the sand body phase time carry out it is vertical split point, split point according to being
Natural gamma GR or natural potential SP curve are obviously return to shale line, return amplitude >=50%.As shown in figure 8, A sand body
Reservoir architecture unit 1 and reservoir architecture unit 4 are to cut stack-type interfacial contact, and A5 well location is in cutting in stack-type bounds, using certainly
The return feature of right gamma GR curve is splitted into upper and lower two phase, 6 meters of middle and upper part sand thickness, is located at reservoir architecture list
In first 4 ranges, 9 meters of lower part sand thickness, it is located in 1 range of reservoir architecture unit.
B) reflect that the seismic properties of sandstone thickness generally use amplitude generic attribute, the present embodiment extracts A sand body top bottom position
Between RMS amplitude attribute.
2) the sand thickness interpolation of seismic properties constraint well point: 1. as unit of reservoir architecture unit 4, by well within the scope of its
Coordinate, sand thickness and the seismic properties importing Petrel E&P Software Platform for reflecting sand thickness of point
2017 software platforms.For cutting the A5 well in stack-type bounds, then using within the scope of the reservoir architecture unit after vertical split point
6 meters of sand thickness.2. using the make surface function under software platform Stratigraphy module, to reflect sandstone
The seismic properties of thickness constrain, and carry out interpolation using well point sandstone thickness, generate the sandstone thickness etc. of reservoir architecture unit 4
It is worth line chart (as shown in Figure 9).1. and 2. 3. repeating the above steps, the sand thickness isopleth in other reservoir architecture units is generated
Figure.
Step 3: sandstone thickness isogram generates:
1) development period of neighboring reservoirs configurational unit is analyzed: be with the flooding mud stone at the top of short-term or short-term cyclical sequences etc.
When interface, the depth displacement using different reservoir configurational unit apart from isochronic plane, in conjunction with seismic data to reservoir architecture haplophase
Secondary indicative function determines the development period of neighboring reservoirs configurational unit.
By taking reservoir architecture unit 2 and reservoir architecture unit 4 as an example, a set of stable short-term cycle flood is developed on A sand body top
General mud stone, can be used as isochronic plane.The distance of reservoir architecture unit 4 to isochronic plane is close with reservoir architecture unit 2, it is difficult to point
Distinguish the morning and evening relationship of its development, but reservoir architecture unit 4 is stacked and placed on reservoir architecture unit 2, can determine whether reservoir architecture accordingly
The time that unit 4 is developed is later than reservoir architecture unit 2 (as shown in Figure 10).
2) sandstone thickness isogram overlaps: according to the development period of above-mentioned reservoir architecture unit, early stage reservoir architecture list
Member under, advanced stage reservoir architecture unit upper, the sandstone thickness isogram of different reservoir configurational unit is overlapped, reservoir is generated
The sand thickness isogram of configuration constraint.
By taking reservoir architecture unit 2 and reservoir architecture unit 4 as an example, the time that reservoir architecture unit 4 is developed is later than reservoir structure
Type unit 2, therefore the sandstone thickness isogram of reservoir architecture unit 2 is placed under reservoir architecture unit 4, by other reservoir structures
The sandstone thickness isogram of type unit is overlapped according to development period, generates the sandstone thickness isogram of reservoir architecture constraint
(as shown in figure 11).
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each component, connection type and manufacture craft etc. are all
It can be varied, all equivalents and improvement carried out based on the technical solution of the present invention should not exclude
Except protection scope of the present invention.
Claims (10)
1. a kind of sandstone thickness isogram preparation method of reservoir architecture constraint, which comprises the following steps:
Step 1: reservoir architecture dividing elements, comprising: 1) reservoir architecture interface is predicted；2) reservoir architecture Interface classification；3) reservoir
Configuration interface combinations；
Step 2: the sandstone thickness isogram establishment in reservoir architecture unit, comprising: 1) data preparation；2) seismic properties are about
The sandstone thickness interpolation of Shu Jingdian；
Step 3: sandstone thickness isogram generates, comprising: 1) analyzes the development period of neighbouring configuration unit；2) sand thickness
Isogram overlapping.
2. sandstone thickness isogram preparation method according to claim 1, which is characterized in that the reservoir architecture interface
The detailed process of prediction are as follows: utilize pure wave seismic data, it is discontinuous to be able to reflect reservoir plane for extraction within the scope of research layer position
Property sensitive earthquake attribute, the position of attribute value exception, that is, reservoir architecture interface development position；
The detailed process of the reservoir architecture Interface classification are as follows: according to above-mentioned reservoir architecture interface prediction result, exist in conjunction with reservoir
Reservoir architecture boundary division for pinching type, contact-type and is cut stack-type three classes by the response characteristic on seismic profile；
The detailed process of the reservoir architecture interface combinations are as follows: in conjunction with the geometric shape of reservoir architecture unit, by adjacent reservoir
Configuration interface is combined, and realizes reservoir architecture dividing elements.
3. sandstone thickness isogram preparation method according to claim 2, which is characterized in that the sensitive earthquake attribute
Including curvature body or ant body.
4. sandstone thickness isogram preparation method according to claim 2, which is characterized in that the feature of the pinching type
It is that sand body is embedded in mud stone in isolation, sand thickness is gradually thinning and pinching, adjacent sand body do not contact each other；
The contact-type is characterized in that two neighboring sand body laterally contacts, edge is overlapped, but is not connected between sand body；
The stack-type of cutting is characterized in that two neighboring sand body is laterally stacked, and it is advanced stage sand that sand thickness, which increases, seismic response enhances
Body corrodes early stage sand body stacked result.
5. sandstone thickness isogram preparation method according to claim 2, which is characterized in that common river and triangle
The geometric shape of continent phase configurational unit includes: the point bar of meandering stream due to being transformed by later period river, mostly in subcircular or nearly ellipse
Shape, multiple point bars are arranged along river spreading direction；The channel bar of braided stream assumes diamond in shape or spindle more, be held on braided channel it
Between；The distributary channel of delta is in band-like spread along water (flow) direction；Potato shape or ellipticity is then presented in the estuary dam of delta, point
It is distributed in the front or two sides of distributary channel end.
6. sandstone thickness isogram preparation method according to claim 1, which is characterized in that the tool of the data preparation
Body process are as follows: the sandstone thickness isogram establishment in reservoir architecture unit needs two class data, thick including the sandstone at well point
The seismic properties of degree and reflection sandstone thickness: a) sandstone thickness at well point is obtained by the lithology of well log interpretation；B) reflect sand
The seismic properties of rock thickness use amplitude generic attribute.
7. sandstone thickness isogram preparation method according to claim 6, which is characterized in that for cutting stack-type reservoir structure
Well in type bounds is formed due to being that more phase sand bodies are stacked, should carry out the sandstone thickness at well point according to the sand body phase time
Vertical to split point, the foundation split point is that natural gamma GR or natural potential SP curve are obviously return to shale line, return amplitude >=
50%.
8. sandstone thickness isogram preparation method according to claim 6, which is characterized in that the seismic properties constraint
The detailed process of the sandstone thickness interpolation of well point are as follows: 1. as unit of a certain reservoir architecture unit, by the seat of well point within the scope of its
It is soft that the seismic properties of mark, sandstone thickness and reflection sandstone thickness import Petrel E&P Software Platform 2017
Part platform；2. using the make surface function under software platform Stratigraphy module, to reflect sandstone thickness
Seismic properties constrain, and carry out interpolation using well point sandstone thickness, and the sand thickness generated in the reservoir architecture unit is equivalent
Line chart；1. and 2. 3. repeating the above steps, the sand thickness isogram in other reservoir architecture units is generated.
9. sandstone thickness isogram preparation method according to claim 1, which is characterized in that the analysis neighboring reservoirs
The detailed process of the development period of configurational unit are as follows: using the flooding mud stone at the top of short-term or short-term cyclical sequences as isochronic plane, benefit
Depth displacement with different reservoir configurational unit apart from isochronic plane makees the instruction of reservoir architecture haplophase time in conjunction with seismic data
With determining the development period of neighboring reservoirs configurational unit.
10. sandstone thickness isogram preparation method according to claim 9, which is characterized in that described sand thickness etc.
It is worth the detailed process of line chart overlapping are as follows: according to the development period of above-mentioned neighboring reservoirs configurational unit, early stage reservoir architecture unit exists
Under, advanced stage reservoir architecture unit upper, the sandstone thickness isogram in different reservoir configurational unit is overlapped, reservoir structure is generated
The sandstone thickness isogram of type constraint.
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| CN112523750A (en) * | 2020-11-20 | 2021-03-19 | 中国石油天然气股份有限公司 | Method and device for determining pinch-out position of sand body and storage medium |
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| CN111611422B (en) * | 2020-05-21 | 2020-12-01 | 广东省地震局 | SVC-based method and system for automatically generating qualitative graph in earthquake disaster risk assessment |
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| CN111985125B (en) * | 2020-07-15 | 2023-08-11 | 北京金阳普泰石油技术股份有限公司 | Single sand modeling method, system, equipment and readable storage medium |
| CN112523750A (en) * | 2020-11-20 | 2021-03-19 | 中国石油天然气股份有限公司 | Method and device for determining pinch-out position of sand body and storage medium |
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| CN113031065A (en) * | 2020-12-02 | 2021-06-25 | 中海石油(中国)有限公司 | Oil field sand body geological modeling method |
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