CN107505663B - A kind of method for building up of carbonate reservoir classification plate and application - Google Patents
A kind of method for building up of carbonate reservoir classification plate and application Download PDFInfo
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- CN107505663B CN107505663B CN201710695594.6A CN201710695594A CN107505663B CN 107505663 B CN107505663 B CN 107505663B CN 201710695594 A CN201710695594 A CN 201710695594A CN 107505663 B CN107505663 B CN 107505663B
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Abstract
The present invention relates to a kind of method for building up of carbonate reservoir classification plate and applications, it is characterized in that, the following steps are included: 1) establish equilateral triangle coordinate diagram, the bottom edge reference axis of triaxial chart indicates rock type variable quantity, and the left side reference axis and the right reference axis of triaxial chart respectively indicate sedimentary facies variable quantity and diagenetic pattern variable quantity；2) n equal part is carried out respectively to three reference axis, each equal part accordingly represents a kind of rock type of shale content, a kind of sedimentary facies of water energy or a kind of diagenetic diagenetic pattern；3) triaxial chart is parallel to respectively where diagenetic pattern variable quantity while and sedimentary facies variable quantity where while n-1 parallel lines triaxial chart is divided into several subclass reservoirs, the physical property of carbonate reservoir is successively successively decreased from the subclass reservoir of the subclass reservoir above triaxial chart downwards, invention can be widely used in oil-gas field development geology field.
Description
Technical field
The present invention relates to a kind of method for building up of carbonate reservoir classification plate and applications, with belonging to oil-gas field development
Matter field.
Background technique
Marine Carbonate Rocks occupy highly important status in global Oil Gas exploration, are that petroleum important in the world is natural
Gas payzone, compared with clastic reservoir rock, Carbonate Reservoir Characteristics are increasingly complex, and sedimentary facies, rock type and diagenetic pattern
Etc. influence of the factors to reservoir properties it is more significant.Carbonate reservoir has reservoir space type more (matrix pores, corrosion hole
Hole, crack, microcrack), the feature that secondary variation is obvious, heterogeneity and anisotropy are strong, these properties make oil-gas exploration
It is unclear to the distribution understanding of Favorable Reservoir in exploitation.It important is commented the study found that the quality of physical property is reservoir whether advantageous one
Price card is quasi-, and carbonate reservoir is influenced by Complicated Pore Structures, surveys between reservoir porosity and permeability without obvious
Correlation, therefore, for reservoir physical parameter it is further it is accurate explanation be always perplex well log interpretation personnel a disaster
Topic.
In recent years, the classification method about Complicated Pore Structures carbonate reservoir is relatively fewer, and Relatively centralized, such as
Classified (such as corrosion hole type, slit formation, corrosion hole-slit formation, cave type, hole are responded according to the conventional logging of reservoir
Cave-slit formation), classified using the method for comprehensive marking according to Complicated Pore Structures carbonate reservoir influence factor, with
And simply use mathematical method and classify, however, these above-mentioned methods are in actual operation without systematically considering to influence
The geologic(al) factor of Complicated Pore Structures carbonate reservoir, and the adaptability of many classification methods is limited.
Summary of the invention
In view of the above-mentioned problems, can systematically consider to influence Complicated Pore Structures carbonic acid the object of the present invention is to provide one kind
The method for building up of the carbonate reservoir classification plate of the geologic(al) factor of rock salt reservoir and application.
To achieve the above object, the present invention takes following technical scheme: a kind of foundation of carbonate reservoir classification plate
Method, which comprises the following steps: 1) establish equilateral triangle coordinate diagram, wherein the bottom edge reference axis of triaxial chart
Indicate rock type variable quantity, the left side reference axis and the right reference axis of triaxial chart respectively indicate sedimentary facies variable quantity and at
The shale content of rock Change of types amount, setting rock type variable quantity from left to right successively successively decreases along reference axis, sedimentary facies variation
The water energy of amount and the diagenesis of diagenetic pattern variable quantity are successively successively decreased from top to bottom along reference axis；2) according to carbonate rock
The geological condition of reservoir region determines the equal part number n of three reference axis, and carries out n equal part respectively to three reference axis,
Wherein, each equal part accordingly represents a kind of rock type of shale content, a kind of sedimentary facies of water energy or a kind of diagenesis and makees
Diagenetic pattern；3) triaxial chart is parallel to respectively according to the equal part number n of three reference axis in triaxial chart
Where diagenetic pattern variable quantity while and sedimentary facies variable quantity where while n-1 parallel lines, triaxial chart is divided into several
The physical property of subclass reservoir, carbonate reservoir is successively passed from the subclass reservoir of the subclass reservoir above triaxial chart downwards
Subtract.
Further, triaxial chart is divided into several subclass reservoirs in the step 3), comprising the following steps: 1. basis
The n- on side where the equal part number n of three reference axis is parallel to diagenetic pattern variable quantity to triaxial chart in triaxial chart
Triaxial chart is divided into n major class reservoir by sequence from right to left by 1 parallel lines, and the physical property of carbonate reservoir is from the right side
Side major class reservoir major class reservoir to the left successively successively decreases；2. according to the equal part number n of three reference axis in triaxial chart, to three
The n-1 parallel lines on side, triaxial chart are further divided into several where angular coordinate figure is parallel to sedimentary facies variable quantity
The physical property of subclass reservoir, carbonate reservoir is successively passed from the subclass reservoir of the subclass reservoir above triaxial chart downwards
Subtract, and in triaxial chart center be in carbonate reservoir in the subclass reservoir of same level physical property it is identical.
A kind of application of carbonate reservoir classification plate, which is characterized in that including the following contents: being stored up using carbonate rock
The method for building up of layer classification plate makes to obtain the triaxial chart for being able to reflect Complicated Pore Structures carbonate reservoir；Acquisition
Carbonate reservoir sample to be sorted, and obtain rock type, sedimentary facies and the diagenesis of carbonate reservoir sample to be sorted
Type；Carbonate reservoir sample to be sorted is put by corresponding rock type, sedimentary facies and diagenetic pattern to corresponding subclass
In reservoir, if carbonate reservoir sample is located in the subclass reservoir of triaxial chart the top, the carbonate reservoir
The physical property of sample is best, if carbonate reservoir sample is located in a certain subclass reservoir above triaxial chart, the carbon
The physical property of Carbonate Reservoir sample is preferable, and so on, if carbonate reservoir sample is located at triaxial chart bottom
In a certain subclass reservoir, then the physical property of the carbonate reservoir sample is worst.
The invention adopts the above technical scheme, which has the following advantages: 1, the present invention is based on to complicated hole
The carbonate reservoir governing factor of structure is studied, and systematically considers rock type, sedimentary facies and diagenetic pattern to carbonic acid
The influence of rock salt reservoir, establish triaxial chart to carbonate reservoir carry out evaluation of classification, with sedimentary facies belt, rock type and
Diagenetic pattern is as three control end members, based on the carbonate reservoir physical property result under its combined influence, by carbonate
Rock reservoir carries out classifying and dividing, and plate is simple and clear, and quickly can not only show to clear and definite influences various types carbonate
The leading factor of rock reservoir change can also further instruct the Fine structural interpretation of carbonate reservoir physical parameter.2, originally
It invents the triaxial chart established to divide carbonate reservoir by dividing major class reservoir and subclass reservoir, " pyramid "
The corresponding carbonate reservoir in top physical property it is best, the physical property closer to the tower bottom then carbonate reservoir of " pyramid " is got over
It is poorer to come, and the identical different carbonate reservoir samples of physical property may have different rock types, sedimentary facies and diagenetic pattern, fills
Divide and embody the complexity of carbonate reservoir pore structure, personnel convenient to use combine real current situation to carry out using with pole
Big practicability and adaptability can be widely applied in oil-gas field development geology field.
Detailed description of the invention
Fig. 1 is the classification plate schematic diagram that rock type and sedimentary facies are only considered in the present invention；
Fig. 2 is the classification plate schematic diagram that rock type, sedimentary facies and diagenetic pattern are comprehensively considered in the present invention.
Specific embodiment
Come to carry out detailed description to the present invention below in conjunction with attached drawing.It should be appreciated, however, that attached drawing has been provided only more
Understand the present invention well, they should not be interpreted as limitation of the present invention.
The method for building up of carbonate reservoir classification plate provided by the invention, comprising the following steps:
1, equilateral triangle coordinate diagram is established, wherein the bottom edge reference axis expression rock type variable quantity of triaxial chart, three
The left side reference axis and the right reference axis of angular coordinate figure respectively indicate sedimentary facies variable quantity and diagenetic pattern variable quantity, set rock
The shale content of Change of types amount from left to right successively successively decreases along reference axis, the water energy and diagenetic pattern of sedimentary facies variable quantity
The Constructive diagenesis of variable quantity successively successively decreases from top to bottom along reference axis.
The Dominated Factors for influencing carbonate reservoir mainly include rock type, sedimentary facies, diagenetic pattern and tectonism,
The crack or microcrack that wherein tectonism is formed are classified as constructive diagenetic pattern.Therefore, good carbonate reservoir is rock
The product that stone type, sedimentary facies and diagenetic pattern are overlapped mutually.It is different in view of carbonate reservoir is influenced by diagenetic pattern
There is the phenomenon that " overlapping " between type carbonate reservoir physical property, thus physical data is not included in the foundation of classification plate
In.
2, the equal part number n of three reference axis is determined according to the geological condition of carbonate reservoir region, and to three
A reference axis carries out n equal part respectively, wherein each equal part is a kind of rock type of shale content, a kind of water energy
Sedimentary facies or a kind of diagenetic diagenetic pattern.
In general, the number of three reference axis equal parts of triaxial chart is consistent, one between three variable quantities just can guarantee
One corresponding relationship, often equal part number n is more, then corresponding carbonate reservoir classification is more, i.e. carbonate reservoir classification
Division it is finer.
3, diagenetic pattern is parallel to triaxial chart according to the equal part number n of three reference axis in triaxial chart to become
The n-1 parallel lines on side, are divided into n major class reservoir, Mei Yi great by sequence from right to left for triaxial chart where change amount
The shale content of carbonate reservoir rock type and the water energy of sedimentary facies are identical in class reservoir, the object of carbonate reservoir
From right side major class reservoir, major class reservoir successively successively decreases property to the right.
Rock type and sedimentary facies are to influence the principal element of carbonate reservoir primary pore development, carbonate reservoir
The more low then carbonate reservoir physical property of the shale content of middle rock type is better, the water body energy of sedimentary facies in carbonate reservoir
It is better to measure more strong then carbonate reservoir physical property, although the carbonate rock deposited in various environment is likely to due to sedimentary facies
Influence with diagenetic pattern and the carbonate rock for becoming carbonate reservoir, but being formed in different sedimentary facies becomes carbonate rock storage
The potentiality of layer are not also identical, and the pore character of carbonate reservoir is also different, therefore, is not considering diagenetic pattern to carbonate
The influence of rock reservoir, only consider the influence to carbonate reservoir of rock type and sedimentary facies to the physical property of carbonate reservoir into
Row Preliminary division.
4, according to the equal part number n of three reference axis in triaxial chart, sediment phase change is parallel to triaxial chart
The n-1 parallel lines on side, are further divided into several subclass reservoirs, carbon in each subclass reservoir for triaxial chart where change amount
Shale content, the water energy of sedimentary facies of Carbonate Reservoir rock type are identical with the diagenesis of diagenetic pattern, carbonate
The physical property of rock reservoir is successively successively decreased from the subclass reservoir of the subclass reservoir above triaxial chart downwards, and in triaxial chart
The physical property that center is in carbonate reservoir in the subclass reservoir of same level is identical.
Diagenetic pattern mainly divides constructive diagenetic pattern and destructive diagenetic pattern, the Constructive diagenesis of diagenetic pattern
The physical property of carbonate reservoir is better in more strong then corresponding subclass reservoir, and the destructive diagenesis of diagenetic pattern the strong then right
The physical property of carbonate reservoir is poorer in the subclass reservoir answered.Although not considering influence of the diagenetic pattern to carbonate reservoir
When, carbonate reservoir is by the carbonate reservoir object in major class reservoir on the right side of the control of sedimentary facies between adjacent major class reservoir
Property it is preferable, in the major class reservoir of right side in subclass reservoir carbonate reservoir rock type shale content be lower than left side major class reservoir
The shale content of carbonate reservoir rock type in interior subclass reservoir, carbonate rock storage in subclass reservoir in the major class reservoir of right side
The water energy of layer sedimentary facies is higher than the water energy of carbonate reservoir sedimentary facies in subclass reservoir in left side major class reservoir, but
It is that influence of the diagenetic pattern to carbonate reservoir is stronger, it is right when considering influence of the diagenetic pattern to carbonate reservoir
The Constructive diagenesis of carbonate reservoir diagenetic pattern is weaker than in the major class reservoir of left side in subclass reservoir in the major class reservoir of side
Center is located at the Constructive diagenesis of carbonate reservoir diagenetic pattern in the subclass reservoir of same level, since shale contains
Amount and the difference of water energy can cancel out each other with diagenetic difference, ultimately cause the right side that center is located at same level
In the major class reservoir of side in subclass reservoir in carbonate reservoir and left side major class reservoir in subclass reservoir carbonate reservoir object
Property is identical as a result, accordingly, it is considered to this influence factor of diagenetic pattern, completely classifies to carbonate reservoir sample, no
Same subclass reservoir is the result of the comprehensive response of rock type, sedimentary facies and diagenetic pattern.
It in summary it can be seen, the synthesis of rock type, sedimentary facies and diagenetic pattern three is embodied in table on triaxial chart
Be shown as: the physical property of the corresponding carbonate reservoir in the top of " pyramid " is best, closer to the tower bottom then carbonate of " pyramid "
Worse and worse, the identical different carbonate reservoir samples of physical property may have different rock types, deposition to the physical property of rock reservoir
Phase and diagenetic pattern, have fully demonstrated the complexity of carbonate reservoir pore structure.
The method for building up institute using carbonate reservoir of the present invention classification plate is described in detail below by specific embodiment
The application of the carbonate reservoir classification plate of production, by taking the carbonate reservoir sample of the oil field H as an example:
1) triaxial chart is established, wherein the bottom edge of triaxial chart is rock type variable quantity, a left side for triaxial chart
Side is sedimentary facies variable quantity, and the right of triaxial chart is diagenetic pattern variable quantity.
2) as shown in Figure 1, being the quartering by three reference axis in triaxial chart, and triaxial chart is parallel to
3 parallel lines of the right diagenetic pattern variable quantity, then the bottom edge of triaxial chart from right to left be respectively the first rock type~
4th rock type, and the shale content of rock type successively successively decreases from left to right；The left side of triaxial chart is divided from the top down
Not Wei the first sedimentary facies~the 4th sedimentary facies, and the water energy of sedimentary facies successively successively decreases from the top down.
3) as shown in Fig. 2, being parallel to 3 parallel lines of left side sedimentary facies variable quantity, trigonometric coordinates to triaxial chart
The right of figure from the top down be respectively the first diagenetic pattern~the 4th diagenetic pattern, and from the top down diagenetic pattern by it is constructive at
Gradually transition is destructive diagenesis for rock effect.1 will be divided by sequence from the top down, from right to left in triaxial chart
Subclass reservoir~10 subclass reservoirs, and the carbonate reservoir sample in corresponding major class reservoir is put by diagenetic pattern to corresponding
Subclass reservoir, it may be assumed that
Rock type is the first rock type, sedimentary facies is the first sedimentary facies and diagenetic pattern is the carbon of the first diagenetic pattern
Carbonate Reservoir sample is 1 subclass reservoir, and the physical property of carbonate reservoir sample is best in the subclass reservoir；
Rock type is the first rock type, sedimentary facies is the first sedimentary facies and diagenetic pattern is the carbon of the second diagenetic pattern
Carbonate Reservoir sample is 2 subclass reservoirs, and rock type is the second rock type, sedimentary facies is the second sedimentary facies and diagenetic pattern
Carbonate reservoir sample for the first diagenetic pattern is 3 subclass reservoirs, and carbonate rock stores up in 2 subclass reservoirs and 3 subclass reservoirs
The physical property of layer sample is preferable；
Rock type is the first rock type, sedimentary facies is the first sedimentary facies and diagenetic pattern is the carbon of third diagenetic pattern
Carbonate Reservoir sample is 4 subclass reservoirs, and rock type is the second rock type, sedimentary facies is the second sedimentary facies and diagenetic pattern
Carbonate reservoir sample for the second diagenetic pattern is 5 subclass reservoirs, and rock type is third rock type, sedimentary facies
Three sedimentary facies and diagenetic pattern are that the carbonate reservoir sample of the first diagenetic pattern is 6 subclass reservoirs, 4 subclass reservoirs, 5 subclass
The physical property of carbonate reservoir sample is poor in reservoir and 6 subclass reservoirs；
Rock type is the first rock type, sedimentary facies is the first sedimentary facies and diagenetic pattern is the carbon of the 4th diagenetic pattern
Carbonate Reservoir sample is 7 subclass reservoirs, and rock type is the second rock type, sedimentary facies is the second sedimentary facies and diagenetic pattern
Carbonate reservoir sample for third diagenetic pattern is 8 subclass reservoirs, and rock type is third rock type, sedimentary facies
Three sedimentary facies and diagenetic pattern are that the carbonate reservoir sample of the second diagenetic pattern is 9 subclass reservoirs, and rock type is the 4th
Rock type, sedimentary facies are the 4th sedimentary facies and diagenetic pattern be the carbonate reservoir sample of the first diagenetic pattern is 10 subclass
Reservoir, the physical property of carbonate reservoir sample is worst in 7 subclass reservoirs, 8 subclass reservoirs, 9 subclass reservoirs and 10 subclass reservoirs.
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 (3)
1. a kind of method for building up of carbonate reservoir classification plate, which comprises the following steps:
1) equilateral triangle coordinate diagram is established, wherein the bottom edge reference axis of equilateral triangle coordinate diagram indicates rock type variable quantity, a left side
Side reference axis indicates that sedimentary facies variable quantity, the right reference axis indicate diagenesis Change of types amount, sets the mud of rock type variable quantity
Matter content is from left to right successively successively decreased along reference axis, and the water energy of sedimentary facies variable quantity and the diagenesis of diagenetic pattern variable quantity are made
Successively successively decreased from top to bottom with along reference axis；
2) the equal part number n of three reference axis is determined according to the geological condition of carbonate reservoir region, and three are sat
Parameter carries out n equal part respectively, wherein each equal part accordingly represents the rock type of shale content a kind of, a kind of water energy
Sedimentary facies or a kind of diagenetic diagenetic pattern；
3) equilateral triaxial chart is parallel into respectively according to the equal part number n of three reference axis in equilateral triangle coordinate diagram
Where rock Change of types amount while and sedimentary facies variable quantity where while n-1 parallel lines, if equilateral triangle coordinate diagram is divided into
Dry subclass reservoir, the physical property of carbonate reservoir from the subclass reservoir downwards of the subclass reservoir above equilateral triangle coordinate diagram according to
It is secondary to successively decrease.
2. a kind of method for building up of carbonate reservoir classification plate as described in claim 1, which is characterized in that the step
3) equilateral triangle coordinate diagram is divided into several subclass reservoirs in, comprising the following steps:
1. being parallel to diagenesis class to equilateral triaxial chart according to the equal part number n of three reference axis in equilateral triangle coordinate diagram
The n-1 parallel lines on side, are divided into n major class reservoir by sequence from right to left for equilateral triangle coordinate diagram where type variable quantity,
The physical property of carbonate reservoir is successively successively decreased from right side major class reservoir major class reservoir to the left；
2. being parallel to deposition to equilateral triaxial chart according to the equal part number n of three reference axis in equilateral triangle coordinate diagram
The n-1 parallel lines on side, are further divided into several subclass reservoirs, carbonate rock for equilateral triangle coordinate diagram where phase change amount
The physical property of reservoir is successively successively decreased from the subclass reservoir of the subclass reservoir above equilateral triangle coordinate diagram downwards, and equilateral triangle is sat
Mark on a map center be in carbonate reservoir in the subclass reservoir of same level physical property it is identical.
3. a kind of application of carbonate reservoir classification plate, which is characterized in that including the following contents:
It makes to obtain using the method for building up of carbonate reservoir as claimed in claim 1 or 2 classification plate and be able to reflect again
The equilateral triangle coordinate diagram of miscellaneous pore structure carbonate reservoir；
Carbonate reservoir sample to be sorted is acquired, and obtains the rock type of carbonate reservoir sample to be sorted, deposition
Phase and diagenetic pattern；
Carbonate reservoir sample to be sorted is put by corresponding rock type, sedimentary facies and diagenetic pattern to corresponding subclass and is stored up
In layer, if carbonate reservoir sample is located in the subclass reservoir of equilateral triangle coordinate diagram the top, carbonate rock storage
The physical property of layer sample is best, if carbonate reservoir sample is located in a certain subclass reservoir above equilateral triangle coordinate diagram,
Then the physical property of the carbonate reservoir sample is preferable, and so on, if carbonate reservoir sample is located at equilateral triangle coordinate
In a certain subclass reservoir of figure bottom, then the physical property of the carbonate reservoir sample is worst.
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| CN110413951B (en) * | 2018-04-28 | 2023-04-25 | 中国石油天然气股份有限公司 | Determination method for coal bed methane well drainage and production speed |
| CN111665272A (en) * | 2019-03-08 | 2020-09-15 | 中国石油天然气集团有限公司 | Reservoir physical property evaluation method and device based on triangular evaluation chart |
| CN111079313B (en) * | 2019-12-31 | 2021-12-17 | 成都理工大学 | Carbonate reservoir information classification processing method and information data processing terminal |
| CN112258603B (en) * | 2020-10-30 | 2021-09-21 | 西南石油大学 | Three-axis layout drawing method for analyzing rule of three-factor composite influence and application thereof |
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