CN109061761B - Sealing ability of cap rock evaluation method and device - Google Patents
Sealing ability of cap rock evaluation method and device Download PDFInfo
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- CN109061761B CN109061761B CN201810510786.XA CN201810510786A CN109061761B CN 109061761 B CN109061761 B CN 109061761B CN 201810510786 A CN201810510786 A CN 201810510786A CN 109061761 B CN109061761 B CN 109061761B
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The present invention provides a kind of sealing ability of cap rock evaluation method and devices, this method comprises: obtaining the stratum log data of the oil/gas well in target exploration region, by the corresponding relationship of the thickness of the cap rock of several oil/gas wells and the shale content of cap rock, it substitutes into using the thickness value of cap rock as abscissa, the shale content of cap rock is in the two-dimensional coordinate system that ordinate is established, according to the cap rock position of several oil/gas wells, oil-gas Layer position, oil/gas well coordinate points in two-dimensional coordinate system are divided into oil-gas Layer completely under cap rock, oil-gas Layer is completely on cap rock and oil-gas Layer three types above and below cap rock, according to the coordinate points in the two-dimensional coordinate system for dividing region, determine sealing ability of cap rock evaluation parameter threshold value, and evaluate the sealing ability of cap rock to be evaluated, stratum log data is easy to obtain, it does not need to prepare a large amount of experiment rock core, cost compared with Low, it is high that sealing ability of cap rock evaluates accuracy.
Description
Technical field
The invention belongs to oil-gas field development technical field more particularly to a kind of sealing ability of cap rock evaluation method and devices.
Background technique
Cap rock refers to can insulate the protective layer that reservoir makes oil gas therein from upward loss on reservoir.
Cap rock is the less permeable layer being close to reservoir, can protect the not upward loss of the oil gas in reservoir.Cap rock is mostly by mud stone, page
Rock, cream rock and rock salt or marl etc. are constituted.Good sealing ability of cap rock is the necessary condition to form large oil and gas fields, cap rock
Sealing ability evaluation is the key factor in Oil-gas exploration evaluation.
The current existing major way evaluated sealing ability of cap rock is, in laboratory by physical analogy to rock
The heart carries out displacement pressure experiment, and then obtains the sealing ability of cap rock, but this mode needs to prepare a large amount of experiment rock
The heart leads to cost increase, if rock core negligible amounts, obtain data influenced seriously by cap rock heterogeneity, evaluation result error compared with
Greatly.
Summary of the invention
In view of this, the embodiment of the invention provides sealing ability of cap rock evaluation method and device, to solve the prior art
In by physical analogy to rock core carry out displacement pressure experiment, need to prepare a large amount of experiment rock core, lead to cost increase, if
Rock core negligible amounts, obtain data is influenced seriously by cap rock heterogeneity, the larger problem of evaluation result error.
The first aspect of the embodiment of the present invention provides a kind of sealing ability of cap rock evaluation method, comprising:
The stratum log data for obtaining the oil/gas well in target exploration region, wherein the stratum log data includes the mesh
Mark the cap rock positions of several oil/gas wells of survey area, oil-gas Layer position, the thickness of cap rock and cap rock shale content；
The corresponding relationship of the thickness of the cap rock of several oil/gas wells and the shale content of cap rock is substituted into the thickness of cap rock
Angle value be abscissa, cap rock shale content be ordinate establish two-dimensional coordinate system in, obtain the lid of several oil/gas wells
The coordinate points of the shale content of the thickness and cap rock of layer；
According to the cap rock position of several oil/gas wells, oil-gas Layer position, by the oil/gas well coordinate points in the two-dimensional coordinate system
Be divided into oil-gas Layer completely under cap rock, oil-gas Layer is completely on cap rock and oil-gas Layer three types above and below cap rock；
According to the coordinate points in the two-dimensional coordinate system for dividing region, sealing ability of cap rock evaluation parameter threshold value, and root are determined
According to the sealing ability of cap rock evaluation parameter threshold value, the sealing ability of cap rock to be evaluated is evaluated.
In one embodiment, the coordinate points according in the two-dimensional coordinate system for dividing region, determine closed cap energy
Power evaluation parameter threshold value, and according to the sealing ability of cap rock evaluation parameter threshold value, the sealing ability of cap rock to be evaluated is evaluated, is wrapped
It includes:
According to the coordinate points in the two-dimensional coordinate system for dividing region, first cover thickness threshold value and the second cap rock are determined
Thickness threshold value；
When cap rock to be evaluated any in several oil/gas wells is less than the first cover thickness threshold value, it is determined that described to be evaluated
Cap rock does not have sealing ability；
When the cap rock to be evaluated is greater than or equal to the first cover thickness threshold value and is less than second depth of cover
Threshold value, it is determined that the cap rock to be evaluated has semiclosed ability；
When the cap rock to be evaluated is greater than or equal to the second depth of cover threshold value, it is determined that the cap rock tool to be evaluated
There is complete semiclosed ability.
In one embodiment, the coordinate points according in the two-dimensional coordinate system for dividing region, determine closed cap energy
Power evaluation parameter threshold value, and according to the sealing ability of cap rock evaluation parameter threshold value, the sealing ability of cap rock to be evaluated is evaluated, is wrapped
It includes:
According to the coordinate points in the two-dimensional coordinate system for dividing region, first cover shale content threshold value and second are determined
Cap rock shale content threshold value；
When cap rock to be evaluated any in several oil/gas wells be less than the first cover shale content threshold value, it is determined that it is described to
It evaluates cap rock and does not have sealing ability；
When the cap rock to be evaluated is greater than or equal to the first cover shale content threshold value and is less than second cap rock
Shale content threshold value, it is determined that the cap rock to be evaluated has semiclosed ability；
When the cap rock to be evaluated is greater than or equal to the second cap rock shale content threshold value, it is determined that the lid to be evaluated
Layer has complete semiclosed ability.
In one embodiment, the method also includes: obtain oil-gas Layer completely on cap rock and oil-gas Layer covering
The coordinate points of target oil/gas well of the oil-gas Layer completely under cap rock near the enveloping outer enclosure in the joint region that layer forms up and down；
Data fitting is carried out to the coordinate points of the target oil/gas well, obtains enveloping outer enclosure equation；
According to the enveloping outer enclosure equation, the sealing ability of cap rock to be evaluated is evaluated.
In one embodiment, described that the sealing ability of cap rock to be evaluated is evaluated according to the enveloping outer enclosure equation, packet
It includes:
By preset target shale content, it is directed into the enveloping outer enclosure equation, obtains preset target shale content pair
The theoretical minimum thickness answered, wherein enveloping outer enclosure equation is the functional relation of shale content and thickness；
When the thickness of cap rock to be evaluated any in several oil/gas wells is greater than the theoretical minimum thickness, the lid to be evaluated
Layer has completely enclosed ability.
The second aspect of the embodiment of the present invention provides a kind of sealing ability of cap rock evaluating apparatus, comprising: data obtains single
Member, the stratum log data of the oil/gas well for obtaining target exploration region, wherein the stratum log data includes the mesh
Mark the cap rock positions of several oil/gas wells of survey area, oil-gas Layer position, the thickness of cap rock and cap rock shale content；
Coordinate points establish unit, for the thickness of the cap rock of several oil/gas wells is corresponding with the shale content of cap rock
Relationship, substituting into is to obtain in the two-dimensional coordinate system of ordinate foundation using the thickness value of cap rock as the shale content of abscissa, cap rock
The coordinate points of the shale content of the thickness and cap rock of the cap rock of several oil/gas wells；
Type division unit, for cap rock position, the oil-gas Layer position according to several oil/gas wells, by the two-dimensional coordinate system
In oil/gas well coordinate points be divided into oil-gas Layer completely under cap rock, oil-gas Layer is completely on cap rock and oil-gas Layer is in cap rock
Upper and lower three types；
Evaluation unit, for determining that sealing ability of cap rock is evaluated according to the coordinate points in the two-dimensional coordinate system for dividing region
Parameter threshold, and according to the sealing ability of cap rock evaluation parameter threshold value, evaluate the sealing ability of cap rock to be evaluated.
In one embodiment, the evaluation unit includes:
Threshold value determines subelement, for determining the first lid according to the coordinate points in the two-dimensional coordinate system for dividing region
Thickness degree threshold value and the second depth of cover threshold value；
First evaluation subelement is less than the first cover thickness threshold for working as any cap rock to be evaluated in several oil/gas wells
Value, it is determined that the cap rock to be evaluated does not have sealing ability；
Second evaluation subelement, for when the cap rock to be evaluated be greater than or equal to the first cover thickness threshold value and
Less than the second depth of cover threshold value, it is determined that the cap rock to be evaluated has semiclosed ability；
Third evaluates subelement, for being greater than or equal to the second depth of cover threshold value when the cap rock to be evaluated, then
Determine that the cap rock to be evaluated has complete semiclosed ability.
In one embodiment, the threshold value determines subelement, is also used to according to the two-dimensional coordinate system for dividing region
In coordinate points, determine first cover shale content threshold value and the second cap rock shale content threshold value；
The first evaluation subelement is also used to when any cap rock to be evaluated is less than the first cover in several oil/gas wells
Shale content threshold value, it is determined that the cap rock to be evaluated does not have sealing ability；
The second evaluation subelement is also used to contain when the cap rock to be evaluated is greater than or equal to the first cover shale
It measures threshold value and is less than the second cap rock shale content threshold value, it is determined that the cap rock to be evaluated has semiclosed ability；
The third evaluates subelement, is also used to contain when the cap rock to be evaluated is greater than or equal to the second cap rock shale
Measure threshold value, it is determined that the cap rock to be evaluated has complete semiclosed ability.
In one embodiment, the evaluation unit is also used to obtain in oil-gas Layer completely on cap rock and oil-gas Layer
The seat of target oil/gas well of the oil-gas Layer completely under cap rock near the enveloping outer enclosure in the joint region formed above and below cap rock
Punctuate carries out data fitting to the coordinate points of the target oil/gas well, enveloping outer enclosure equation is obtained, according to the enveloping outer enclosure side
Journey evaluates the sealing ability of cap rock to be evaluated.
The third party of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage medium
Matter is stored with computer program, and the computer program realizes above-mentioned sealing ability of cap rock evaluation method when being executed by processor
The step of.
Existing beneficial effect is the embodiment of the present invention compared with prior art: closed cap provided in an embodiment of the present invention
Merit rating method and device, first the stratum log data of the oil/gas well in acquisition target exploration region, then by several oil gas
The corresponding relationship of the shale content of the thickness and cap rock of the cap rock of well is substituted into using the thickness value of cap rock as abscissa, the mud of cap rock
Matter content is to obtain the thickness of the cap rock of several oil/gas wells and the shale content of cap rock in the two-dimensional coordinate system that ordinate is established
Coordinate points, and according to the cap rock position of several oil/gas wells, oil-gas Layer position, the oil/gas well coordinate points in two-dimensional coordinate system are divided
For oil-gas Layer completely under cap rock, oil-gas Layer completely on cap rock and oil-gas Layer three types above and below cap rock, last root
According to the coordinate points in the two-dimensional coordinate system for dividing region, sealing ability of cap rock evaluation parameter threshold value is determined, and according to closed cap
Merit rating parameter threshold evaluates the sealing ability of cap rock to be evaluated, and stratum log data is easy to obtain, and it is big not need preparation
The experiment rock core of amount, cost is relatively low, by the thickness of the cap rock in the log data of stratum and the shale content of cap rock to cap rock
Sealing ability evaluation, it is high that sealing ability of cap rock evaluates accuracy.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the flow diagram for the sealing ability of cap rock evaluation method that one embodiment of the invention provides；
Fig. 2 is that the volcanic rock cap rock and its stratum log data of recess Guantao group in fort on the south provided in an embodiment of the present invention are
The schematic diagram of two-dimensional coordinate system and coordinate points that example is established；
Fig. 3 be another embodiment of the present invention provides sealing ability of cap rock evaluation method flow diagram；
Fig. 4 is the structural block diagram for the sealing ability of cap rock evaluating apparatus that one embodiment of the invention provides；
Fig. 5 is the schematic diagram that the sealing ability of cap rock that one embodiment of the invention provides evaluates terminal device.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
With reference to Fig. 1, Fig. 1 is the flow diagram for the sealing ability of cap rock evaluation method that one embodiment of the invention provides.It should
Method can be applied in the computers or server of data such as processing oil gas data, and details are as follows for the method:
S101: the stratum log data of the oil/gas well in target exploration region is obtained, wherein stratum log data includes target
The cap rock positions of several oil/gas wells of survey area, oil-gas Layer position, the thickness of cap rock and cap rock shale content.
In the present embodiment, target exploration region can be with a certain structure of oil field region.For example, the fire of Nan Bao recess Guantao group
Mountain laccolith layer and its stratum log data.
S102: the corresponding relationship of the thickness of the cap rock of several oil/gas wells and the shale content of cap rock is substituted into cap rock
Thickness value be abscissa, cap rock shale content be ordinate establish two-dimensional coordinate system in, obtain the cap rock of several oil/gas wells
Thickness and cap rock shale content coordinate points.
In the present embodiment, establishing by the shale content of abscissa, cap rock of the thickness value of cap rock is what ordinate was established
The corresponding relationship (coordinate value) of the thickness of the cap rock of oil/gas well and the shale content of cap rock is directed into two by two-dimensional Cartesian coordinate system
Tie up rectangular coordinate system in, obtain several oil/gas wells using cap rock with a thickness of abscissa, using the shale content of cap rock as ordinate
Coordinate points.
S103: according to the cap rock position of several oil/gas wells, oil-gas Layer position, by the oil/gas well coordinate points in two-dimensional coordinate system
Be divided into oil-gas Layer completely under cap rock, oil-gas Layer is completely on cap rock and oil-gas Layer three types above and below cap rock.
In the present embodiment, the coordinate points of several oil/gas wells are divided according to cap rock position and oil-gas Layer position relative relation
For oil-gas Layer completely under cap rock, oil-gas Layer is completely on cap rock and oil-gas Layer three types above and below cap rock.Wherein, oily
Gas-bearing formation illustrates that oil gas can be enclosed under cap rock by cap rock completely completely under cap rock, i.e., cap rock has totally-enclosed ability；
Oil-gas Layer illustrates that oil gas cannot can be enclosed under cap rock by cap rock completely completely on cap rock, i.e., cap rock does not have envelope
Close ability；Oil-gas Layer illustrates cap rock under the closing to cap rock of a part of oil gas, a part of oil gas does not seal above and below cap rock
It closes, i.e., cap rock has semiclosed ability.
Specifically, with reference to Fig. 2, Nan Bao is recessed for the volcanic rock cap rock and its stratum log data of Guantao group, with first
Label symbol (such as triangle symbol ▲) marks coordinate points of the oil-gas Layer completely under cap rock；With the second label symbol (example
Such as diamond symbols ◆) coordinate points of the label oil-gas Layer completely above and below cap rock；With third label symbol (such as four flexional symbols
) coordinate points of the label oil-gas Layer completely above and below cap rock.
S104: according to the coordinate points in the two-dimensional coordinate system for dividing region, determining sealing ability of cap rock evaluation parameter threshold value,
And according to sealing ability of cap rock evaluation parameter threshold value, the sealing ability of cap rock to be evaluated is evaluated.
In the present embodiment, cap rock to be evaluated can be the cap rock without stratum log data in target exploration region.
From above-described embodiment it is found that the stratum log data of the present embodiment is easy to obtain, do not need to prepare a large amount of reality
It tests and uses rock core, cost is relatively low, by the thickness of the cap rock in the log data of stratum and the shale content of cap rock to closed cap energy
Power evaluation, it is high that sealing ability of cap rock evaluates accuracy.
In one embodiment of the invention, above-mentioned steps S104 specifically:
According to the coordinate points in the two-dimensional coordinate system for dividing region, first cover thickness threshold value and the second cap rock are determined
Thickness threshold value；
When cap rock to be evaluated any in several oil/gas wells is less than the first cover thickness threshold value, it is determined that described to be evaluated
Cap rock does not have sealing ability；
When the cap rock to be evaluated is greater than or equal to the first cover thickness threshold value and is less than second depth of cover
Threshold value, it is determined that the cap rock to be evaluated has semiclosed ability；
When the cap rock to be evaluated is greater than or equal to the second depth of cover threshold value, it is determined that the cap rock tool to be evaluated
There is complete semiclosed ability.
With reference to Fig. 2, on the south fort recess Guantao group volcanic rock cap rock and its stratum log data, establish two-dimensional coordinate system and
For coordinate points, first cover thickness threshold value is 60m, and the second depth of cover threshold value is 205m.
In another embodiment of the present invention, above-mentioned steps S104 specifically:
According to the coordinate points in the two-dimensional coordinate system for dividing region, first cover shale content threshold value and second are determined
Cap rock shale content threshold value；
When cap rock to be evaluated any in several oil/gas wells be less than the first cover shale content threshold value, it is determined that it is described to
It evaluates cap rock and does not have sealing ability；
When the cap rock to be evaluated is greater than or equal to the first cover shale content threshold value and is less than second cap rock
Shale content threshold value, it is determined that the cap rock to be evaluated has semiclosed ability；
When the cap rock to be evaluated is greater than or equal to the second cap rock shale content threshold value, it is determined that the lid to be evaluated
Layer has complete semiclosed ability.
With reference to Fig. 2, on the south fort recess Guantao group volcanic rock cap rock and its stratum log data, the two-dimensional coordinate system of foundation
And for coordinate points, first cover shale content threshold value is 15%, and the second cap rock shale content threshold value is 30%.
With reference to Fig. 3, Fig. 3 be another embodiment of the present invention provides sealing ability of cap rock evaluation method flow diagram,
On the basis of above-described embodiment in embodiment, after step s 104, the method also includes:
S201: the outsourcing in the joint region formed above and below cap rock completely on cap rock with oil-gas Layer in oil-gas Layer is obtained
The coordinate points of target oil/gas well of the oil-gas Layer completely under cap rock near winding thread.
In the present embodiment, the joint region that oil-gas Layer forms above and below cap rock completely on cap rock with oil-gas Layer is
Do not have the region of the coordinate points of completely enclosed ability in coordinate system.In joint region and oil-gas Layer region completely under cap rock
Adjacent binding site, the seat of target oil/gas well of the oil-gas Layer near enveloping outer enclosure completely under cap rock to combine region
Punctuate.Nearby coordinate points characterize the pass corresponding with shale content of the depth of cover just with completely enclosed ability to enveloping outer enclosure
System.
With reference to Fig. 2, combine the enveloping outer enclosure in region for the curve where the ECD in Fig. 2.
S202: data fitting is carried out to the coordinate points of the target oil/gas well, obtains enveloping outer enclosure equation.
According to the coordinate points of target oil/gas well of the enveloping outer enclosure oil-gas Layer completely under cap rock, i.e. depth of cover and shale
The corresponding relationship of content obtains enveloping outer enclosure equation.
For example, the stratum log data of the oil/gas well in a certain oil field prospecting region, the enveloping outer enclosure equation being fitted is L
=-0.0028H+0.9081, L is cap rock content of mudstone in formula, and H is rock depth of cover.
S203: according to enveloping outer enclosure equation, the sealing ability of cap rock to be evaluated is evaluated.
In one embodiment that this is invented in fact, step S203 specifically:
By preset target shale content, it is directed into the enveloping outer enclosure equation, obtains preset target shale content pair
The theoretical minimum thickness answered, wherein enveloping outer enclosure equation is the functional relation of shale content and thickness；When in several oil/gas wells
When the thickness of any cap rock to be evaluated is greater than the theoretical minimum thickness, the cap rock to be evaluated has completely enclosed ability.
In another example of the invention,
The cap rock to be evaluated does not have sealing ability and refers to that oil-gas Layer is distributed on cap rock to be evaluated；
There is the cap rock to be evaluated semiclosed ability to refer to that oil-gas Layer is distributed above and below cap rock to be evaluated；
There is the cap rock to be evaluated totally-enclosed ability to refer to that oil-gas Layer is distributed under cap rock to be evaluated.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present invention constitutes any limit
It is fixed.
Corresponding to the sealing ability of cap rock evaluation method of foregoing embodiments, Fig. 4 is the cap rock that one embodiment of the invention provides
The structural block diagram of sealing ability evaluating apparatus, for ease of description, only parts related to embodiments of the present invention are shown.Reference
Fig. 4, the device include: that data acquiring unit 301, coordinate points establish unit 302, Type division unit 303 and evaluation unit
304。
Wherein, data acquiring unit 301, the stratum log data of the oil/gas well for obtaining target exploration region, wherein
The stratum log data include the cap rock positions of several oil/gas wells in target exploration region, oil-gas Layer position, cap rock thickness
The shale content of degree and cap rock；
Coordinate points establish unit 302, for by the shale content of the thickness of the cap rock of several oil/gas wells and cap rock
Corresponding relationship, substitute into using the thickness value of cap rock as the shale content of abscissa, cap rock be ordinate establish two-dimensional coordinate system in,
Obtain the coordinate points of the thickness of the cap rock of several oil/gas wells and the shale content of cap rock；
Type division unit 303 sits the two dimension for cap rock position, the oil-gas Layer position according to several oil/gas wells
Oil/gas well coordinate points in mark system be divided into oil-gas Layer completely under cap rock, oil-gas Layer exists completely on cap rock with oil-gas Layer
Three types above and below cap rock；
Evaluation unit 304, for determining that sealing ability of cap rock is commented according to the coordinate points in the two-dimensional coordinate system for dividing region
Valence parameter threshold, and according to the sealing ability of cap rock evaluation parameter threshold value, evaluate the sealing ability of cap rock to be evaluated.
From above-described embodiment it is found that the stratum log data of the present embodiment is easy to obtain, do not need to prepare a large amount of reality
It tests and uses rock core, cost is relatively low, by the thickness of the cap rock in the log data of stratum and the shale content of cap rock to closed cap energy
Power evaluation, it is high that sealing ability of cap rock evaluates accuracy.
With reference to Fig. 4, in one embodiment of the invention, the evaluation unit 304 includes:
Threshold value determines subelement 3041, for determining the according to the coordinate points in the two-dimensional coordinate system for dividing region
One depth of cover threshold value and the second depth of cover threshold value；
First evaluation subelement 3042 is less than the first cover thickness for working as any cap rock to be evaluated in several oil/gas wells
Spend threshold value, it is determined that the cap rock to be evaluated does not have sealing ability；
Second evaluation subelement 3043, for being greater than or equal to the first cover thickness threshold when the cap rock to be evaluated
It is worth and is less than the second depth of cover threshold value, it is determined that the cap rock to be evaluated has semiclosed ability；
Third evaluates subelement 3044, for being greater than or equal to the second depth of cover threshold when the cap rock to be evaluated
Value, it is determined that the cap rock to be evaluated has complete semiclosed ability.
With reference to Fig. 4, in one embodiment of the invention,
The threshold value determines subelement 3041, is also used to according to the coordinate points in the two-dimensional coordinate system for dividing region,
Determine first cover shale content threshold value and the second cap rock shale content threshold value；
The first evaluation subelement 3042 is also used to when any cap rock to be evaluated is less than described first in several oil/gas wells
Cap rock shale content threshold value, it is determined that the cap rock to be evaluated does not have sealing ability；
The second evaluation subelement 3043 is also used to be greater than or equal to the first cover mud when the cap rock to be evaluated
Matter content threshold value and be less than the second cap rock shale content threshold value, it is determined that the cap rock to be evaluated have semiclosed ability；
The third evaluates subelement 3044, is also used to be greater than or equal to the second cap rock mud when the cap rock to be evaluated
Matter content threshold value, it is determined that the cap rock to be evaluated has complete semiclosed ability.
With reference to Fig. 4, in one embodiment of the invention, the evaluation unit 304 is also used to obtain complete in oil-gas Layer
Oil-gas Layer on the cap rock and near the enveloping outer enclosure in joint region that oil-gas Layer forms above and below cap rock completely cap rock it
Under target oil/gas well coordinate points, data fitting is carried out to the coordinate points of the target oil/gas well, obtains enveloping outer enclosure equation,
According to the enveloping outer enclosure equation, the sealing ability of cap rock to be evaluated is evaluated.
In another example of the invention,
The cap rock to be evaluated does not have sealing ability and refers to that oil-gas Layer is distributed on cap rock to be evaluated；
There is the cap rock to be evaluated semiclosed ability to refer to that oil-gas Layer is distributed above and below cap rock to be evaluated；
There is the cap rock to be evaluated totally-enclosed ability to refer to that oil-gas Layer is distributed under cap rock to be evaluated.
With reference to Fig. 5, Fig. 5 is the schematic diagram that the sealing ability of cap rock that one embodiment of the invention provides evaluates terminal device.Such as
Terminal 600 in the present embodiment shown in fig. 5 may include: one or more processors 601, one or more input equipments
602, one or more then output equipments 603 and one or more memories 604.Above-mentioned processor 601, input equipment 602, then
Output equipment 603 and memory 604 pass through communication bus 605 and complete mutual communication.Memory 604 is for storing computer
Program, the computer program include program instruction.Processor 601 is used to execute the program instruction of the storage of memory 604.Its
In, processor 601 is configured for that described program instruction execution or less is called to operate each module in above-mentioned each Installation practice/mono-
The function of member, such as the function of module 301 to 304 shown in Fig. 4.
It should be appreciated that in embodiments of the present invention, alleged processor 601 can be central processing unit (Central
Processing Unit, CPU), which can also be other general processors, digital signal processor (Digital
Signal Processor, DSP), specific integrated circuit (Application Specific Integrated Circuit,
ASIC), ready-made programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic
Device, discrete gate or transistor logic, discrete hardware components etc..General processor can be microprocessor or this at
Reason device is also possible to any conventional processor etc..
Input equipment 602 may include that Trackpad, fingerprint adopt sensor (for acquiring the finger print information and fingerprint of user
Directional information), microphone etc., output equipment 603 may include display (LCD etc.), loudspeaker etc..
The memory 604 may include read-only memory and random access memory, and to processor 601 provide instruction and
Data.The a part of of memory 604 can also include nonvolatile RAM.For example, memory 604 can also be deposited
Store up the information of device type.
In the specific implementation, processor 601 described in the embodiment of the present invention, input equipment 602, output equipment 603 can
Implementation described in the first embodiment and second embodiment of service request method provided in an embodiment of the present invention is executed,
Also the implementation of terminal described in the embodiment of the present invention can be performed, details are not described herein.
A kind of computer readable storage medium, the computer-readable storage medium are provided in another embodiment of the invention
Matter is stored with computer program, and the computer program includes program instruction, realization when described program instruction is executed by processor
All or part of the process in above-described embodiment method can also instruct relevant hardware to complete by computer program,
The computer program can be stored in a computer readable storage medium, the computer program when being executed by processor,
The step of above-mentioned each embodiment of the method can be achieved.Wherein, the computer program includes computer program code, the calculating
Machine program code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer
Readable medium may include: any entity or device, recording medium, USB flash disk, the movement that can carry the computer program code
Hard disk, magnetic disk, CD, computer storage, read-only memory (Read-Only Memory, ROM), random access memory
(Random Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium etc..It needs to illustrate
It is that the content that the computer-readable medium includes can be fitted according to the requirement made laws in jurisdiction with patent practice
When increase and decrease, such as in certain jurisdictions, according to legislation and patent practice, computer-readable medium do not include be electric carrier wave
Signal and telecommunication signal.
The computer readable storage medium can be the internal storage unit of terminal described in aforementioned any embodiment, example
Such as the hard disk or memory of terminal.The computer readable storage medium is also possible to the External memory equipment of the terminal, such as
The plug-in type hard disk being equipped in the terminal, intelligent memory card (Smart Media Card, SMC), secure digital (SD,
Secure Digital) card, flash card (Flash Card) etc..Further, the computer readable storage medium can be with
Both including the terminal internal storage unit and also including External memory equipment.The computer readable storage medium is for storing
Other programs and data needed for the computer program and the terminal.The computer readable storage medium can be also used for
Temporarily store the data that has exported or will export.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware
With the interchangeability of software, each exemplary composition and step are generally described according to function in the above description.This
A little functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Specially
Industry technical staff can use different methods to achieve the described function each specific application, but this realization is not
It is considered as beyond the scope of this invention.
It is apparent to those skilled in the art that for convenience of description and succinctly, the end of foregoing description
The specific work process at end and unit, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed terminal and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be tied
Another system is closed or is desirably integrated into, or some features can be ignored or not executed.In addition, shown or discussed phase
Mutually between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication of device or unit
Connection is also possible to electricity, mechanical or other form connections.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.Some or all of unit therein can be selected to realize the embodiment of the present invention according to the actual needs
Purpose.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, is also possible to two or more units and is integrated in one unit.It is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. a kind of sealing ability of cap rock evaluation method characterized by comprising
The stratum log data for obtaining the oil/gas well in target exploration region, wherein the stratum log data includes that the target is surveyed
The cap rock positions of several oil/gas wells in exploratory area domain, oil-gas Layer position, the thickness of cap rock and cap rock shale content；
The corresponding relationship of the thickness of the cap rock of several oil/gas wells and the shale content of cap rock is substituted into the thickness value of cap rock
Shale content for abscissa, cap rock is to obtain the cap rock of several oil/gas wells in the two-dimensional coordinate system that ordinate is established
The coordinate points of the shale content of thickness and cap rock；
According to the cap rock position of several oil/gas wells, oil-gas Layer position, the oil/gas well coordinate points in the two-dimensional coordinate system are divided
For oil-gas Layer completely under cap rock, oil-gas Layer is completely on cap rock and oil-gas Layer three types above and below cap rock；
According to the coordinate points in the two-dimensional coordinate system for dividing region, sealing ability of cap rock evaluation parameter threshold value is determined, and according to institute
Sealing ability of cap rock evaluation parameter threshold value is stated, the sealing ability of cap rock to be evaluated is evaluated.
2. sealing ability of cap rock evaluation method as described in claim 1, which is characterized in that described according to the two dimension for dividing region
Coordinate points in coordinate system determine sealing ability of cap rock evaluation parameter threshold value, and according to the sealing ability of cap rock evaluation parameter
Threshold value evaluates the sealing ability of cap rock to be evaluated, comprising:
According to the coordinate points in the two-dimensional coordinate system for dividing region, first cover thickness threshold value and the second depth of cover are determined
Threshold value；
When cap rock to be evaluated any in several oil/gas wells is less than the first cover thickness threshold value, it is determined that the cap rock to be evaluated
Without sealing ability；
When the cap rock to be evaluated is greater than or equal to the first cover thickness threshold value and is less than the second depth of cover threshold
Value, it is determined that the cap rock to be evaluated has semiclosed ability；
When the cap rock to be evaluated is greater than or equal to the second depth of cover threshold value, it is determined that the cap rock to be evaluated has complete
Semiclosed ability.
3. sealing ability of cap rock evaluation method as described in claim 1, which is characterized in that described according to the two dimension for dividing region
Coordinate points in coordinate system determine sealing ability of cap rock evaluation parameter threshold value, and according to the sealing ability of cap rock evaluation parameter
Threshold value evaluates the sealing ability of cap rock to be evaluated, comprising:
According to the coordinate points in the two-dimensional coordinate system for dividing region, first cover shale content threshold value and the second cap rock are determined
Shale content threshold value；
When cap rock to be evaluated any in several oil/gas wells is less than the first cover shale content threshold value, it is determined that described to be evaluated
Cap rock does not have sealing ability；
When the cap rock to be evaluated is greater than or equal to the first cover shale content threshold value and is less than the second cap rock shale
Content threshold value, it is determined that the cap rock to be evaluated has semiclosed ability；
When the cap rock to be evaluated is greater than or equal to the second cap rock shale content threshold value, it is determined that the cap rock tool to be evaluated
There is complete semiclosed ability.
4. sealing ability of cap rock evaluation method as described in claim 1, which is characterized in that further include:
Near the enveloping outer enclosure for obtaining the joint region formed above and below cap rock completely on cap rock with oil-gas Layer in oil-gas Layer
Target oil/gas well of the oil-gas Layer completely under cap rock coordinate points；
Data fitting is carried out to the coordinate points of the target oil/gas well, obtains enveloping outer enclosure equation；
According to the enveloping outer enclosure equation, the sealing ability of cap rock to be evaluated is evaluated.
5. sealing ability of cap rock evaluation method as claimed in claim 4, which is characterized in that described according to the enveloping outer enclosure side
Journey evaluates the sealing ability of cap rock to be evaluated, comprising:
By preset target shale content, it is directed into the enveloping outer enclosure equation, it is corresponding to obtain preset target shale content
Theoretical minimum thickness, wherein enveloping outer enclosure equation is the functional relation of shale content and thickness；
When the thickness of cap rock to be evaluated any in several oil/gas wells is greater than the theoretical minimum thickness, the cap rock tool to be evaluated
There is completely enclosed ability.
6. a kind of sealing ability of cap rock evaluating apparatus characterized by comprising
Data acquiring unit, the stratum log data of the oil/gas well for obtaining target exploration region, wherein the stratum well logging
Data include the cap rock positions of several oil/gas wells in target exploration region, oil-gas Layer position, the thickness of cap rock and cap rock mud
Matter content；
Coordinate points establish unit, for by the thickness of the cap rock of several oil/gas wells it is corresponding with the shale content of cap rock close
System, substituting into is to obtain institute in the two-dimensional coordinate system of ordinate foundation using the thickness value of cap rock as the shale content of abscissa, cap rock
State the coordinate points of the thickness of the cap rock of several oil/gas wells and the shale content of cap rock；
Type division unit will be in the two-dimensional coordinate system for cap rock position, the oil-gas Layer position according to several oil/gas wells
Oil/gas well coordinate points be divided into oil-gas Layer completely under cap rock, oil-gas Layer is completely on cap rock and oil-gas Layer is above and below cap rock
Three types；
Evaluation unit, for determining sealing ability of cap rock evaluation parameter according to the coordinate points in the two-dimensional coordinate system for dividing region
Threshold value, and according to the sealing ability of cap rock evaluation parameter threshold value, evaluate the sealing ability of cap rock to be evaluated.
7. sealing ability of cap rock evaluating apparatus as claimed in claim 6, which is characterized in that the evaluation unit includes:
Threshold value determines subelement, for determining first cover thickness according to the coordinate points in the two-dimensional coordinate system for dividing region
Spend threshold value and the second depth of cover threshold value；
First evaluation subelement is less than the first cover thickness threshold value for working as any cap rock to be evaluated in several oil/gas wells,
Then determine that the cap rock to be evaluated does not have sealing ability；
Second evaluation subelement, for when the cap rock to be evaluated is greater than or equal to the first cover thickness threshold value and is less than
The second depth of cover threshold value, it is determined that the cap rock to be evaluated has semiclosed ability；
Third evaluates subelement, for being greater than or equal to the second depth of cover threshold value when the cap rock to be evaluated, it is determined that
The cap rock to be evaluated has complete semiclosed ability.
8. sealing ability of cap rock evaluating apparatus as claimed in claim 7, which is characterized in that
The threshold value determines subelement, is also used to determine first according to the coordinate points in the two-dimensional coordinate system for dividing region
Cap rock shale content threshold value and the second cap rock shale content threshold value；
The first evaluation subelement is also used to when any cap rock to be evaluated is less than the first cover shale in several oil/gas wells
Content threshold value, it is determined that the cap rock to be evaluated does not have sealing ability；
The second evaluation subelement is also used to be greater than or equal to the first cover shale content threshold when the cap rock to be evaluated
It is worth and is less than the second cap rock shale content threshold value, it is determined that the cap rock to be evaluated has semiclosed ability；
The third evaluates subelement, is also used to be greater than or equal to the second cap rock shale content threshold when the cap rock to be evaluated
Value, it is determined that the cap rock to be evaluated has complete semiclosed ability.
9. sealing ability of cap rock evaluating apparatus as claimed in claim 6, which is characterized in that
The evaluation unit is also used to obtain the joint formed above and below cap rock completely on cap rock with oil-gas Layer in oil-gas Layer
The coordinate points of target oil/gas well of the oil-gas Layer completely under cap rock near the enveloping outer enclosure in region, to the target oil/gas well
Coordinate points carry out data fitting, obtain enveloping outer enclosure equation, according to the enveloping outer enclosure equation, evaluate the envelope of cap rock to be evaluated
Close ability.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In realization such as sealing ability of cap rock described in any one of claim 1 to 5 is evaluated when the computer program is executed by processor
The step of method.
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| CN201810510786.XA CN109061761B (en) | 2018-05-24 | 2018-05-24 | Sealing ability of cap rock evaluation method and device |
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|---|---|---|---|
| CN201810510786.XA CN109061761B (en) | 2018-05-24 | 2018-05-24 | Sealing ability of cap rock evaluation method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5859367A (en) * | 1997-05-01 | 1999-01-12 | Baroid Technology, Inc. | Method for determining sedimentary rock pore pressure caused by effective stress unloading |
| CN106948811B (en) * | 2017-03-28 | 2020-06-26 | 中国石油大学(北京) | Quantitative characterization method for capping performance of dense carbonate rock cover layer of superimposed basin |
| CN107506534B (en) * | 2017-08-04 | 2021-02-19 | 陕西延长石油（集团）有限责任公司 | Method for evaluating closure of cover layer in carbon dioxide flooding and sequestration |
| CN107479109B (en) * | 2017-10-11 | 2019-04-23 | 中海石油(中国)有限公司 | A kind of effective method of cap rock area in acquisition oil-gas reservoir |
| CN107975362A (en) * | 2017-10-20 | 2018-05-01 | 中国石油天然气股份有限公司 | A kind of evaluation method of lithologic gas reservoirs type gas storage closure |
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