CN109444960A - Determination method for fault tectonic - Google Patents
Determination method for fault tectonic Download PDFInfo
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- CN109444960A CN109444960A CN201811417501.4A CN201811417501A CN109444960A CN 109444960 A CN109444960 A CN 109444960A CN 201811417501 A CN201811417501 A CN 201811417501A CN 109444960 A CN109444960 A CN 109444960A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
- G01V1/48—Processing data
- G01V1/50—Analysing data
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Abstract
The embodiment of the present invention provides a kind of determination method for fault tectonic, belongs to In Oil Field Exploration And Development technical field.The determination method for fault tectonic includes: selection standard well, and the stratigraphic type of geology locating for the standard well includes whole stratigraphic types in work area；Stratum locating for each well in same work area is carried out stratum with stratum locating for the standard well respectively to compare, determines the individual-layer data and breakpoint data of the tomography in the work area；According to the primitively prime number at the tomography accordingly and determine the tomography individual-layer data and breakpoint data, carry out fault tectonic explanation, and determine layer distribution situation；And it is explained according to the fault tectonic and draws subsurface structure depth isopleth map with the layer distribution situation.Through the above technical solutions, can be determined that the distribution situation of the tomography in work area, the accurate fault strike and combined situation analyzed in work area provides theoretical foundation for later stage work.
Description
Technical field
The present invention relates to In Oil Field Exploration And Development technical fields, more particularly to a kind of determination method for fault tectonic.
Background technique
The difficult point of Complex Fault Block Oil Reservoir exploration and development is the identification of fracture system fault strike, since tomography is mutually cut
It cuts, causes construction broken, there are multi-solutions for the syntagmatic of fault plane and section near fault transfer zone, cause to be configured to
Figure precision is low, will affect the excavation of Potential Evaluation and remaining oil.
Combination on fault plane is to project to what plane carried out by the explanation of seismic fault, if explaining
The not guidance of regional tectonic background in the process will lead to interpretation results shortage to the understanding of geologic rule.Current many complexity
The structure interpretation of fault block is confined to small range tectonic framework, does not account for influence of the upper level fracture system to local fault,
Also the analysis that not parameters of tomography are carried out with system, encounters fault transfer zone in fault interpretation process, needs to disconnected
It is entirely to feel to be determined by personal knowledge and experience when layer combination is determined, fault strike and combined judgement is lacked
Weary theoretical foundation.
Summary of the invention
The purpose of the embodiment of the present invention is that providing a kind of determination method for fault tectonic, asked for solving above-mentioned technology
One or more of topic.
To achieve the goals above, the embodiment of the present invention provides a kind of determination method for fault tectonic, the method
It include: selection standard well, the stratigraphic type of geology locating for the standard well includes whole stratigraphic types in work area；It will be same
Stratum locating for each well in work area carries out stratum with stratum locating for the standard well respectively and compares, and determines in the work area
Tomography individual-layer data and breakpoint data；According to the primitively prime number at the tomography accordingly and determine the tomography point
Layer data and breakpoint data carry out fault tectonic explanation, and determine layer distribution situation；And it is explained according to the fault tectonic
Subsurface structure depth isopleth map is drawn with the layer distribution situation.
Optionally, the standard well includes a well or including the multiple wells in same work area, wherein the standard well
When including a well, the stratigraphic type of geology locating for described a well includes whole stratigraphic types in the work area；It is described
When standard well includes the multiple wells in same work area, the stratigraphic type of the geology of the multiple wells combination includes in the work area
Whole stratigraphic types.
Optionally, the method also includes: according to the well logging lithology and log of each well in work area determine described in
Standard well；And standard summary sectional view is drawn according to the corresponding well logging lithology of the standard well and log.
Optionally, the method also includes: according to the fault tectonic explain, determine that tomography describes element, wherein described
It includes fault throw, length, trend and inclination angle that tomography, which describes element,.
Optionally, the method also includes: element is described according to the tomography, the tomography in the work area is classified；
According to the subsurface structure depth isopleth map, fracture system flat distribution map is drawn, to show the different stage in the work area
Tomography plane distribution situation.
Optionally, the method also includes: determine tectonic stress to fault system according to the fracture system flat distribution map
The influence of system and fault strike are corrected and constrain to the trend of the tomography in the fracture system.
Through the above technical solutions, can be determined that the distribution situation of the tomography in work area, the accurate tomography analyzed in work area
Trend and combined situation, provide theoretical foundation for later stage work.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 is the flow chart of the determination method provided in an embodiment of the present invention for fault tectonic；
Fig. 2 is the oil field SNS aperture leakage standard well histogram；
Fig. 3 is the oil field SNS aperture leakage fracture system flat distribution map；
Fig. 4 is that the tomography in the oil field SNS describes element table；
Fig. 5 is that N90 well structure interpretation sectional view is crossed in the oil field SNS；
Fig. 6 is N90 fault block the old and new's tomography comparison diagram in the oil field SNS；
Fig. 7 is the log sheet for crossing NK46-61 well in the N90 in the oil field SNS is disconnected；
Fig. 8 is the subsurface structure depth isopleth map of the N90 fault block in the oil field SNS.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
Fig. 1 is the flow chart of the determination method provided in an embodiment of the present invention for fault tectonic.As shown in Figure 1, this hair
Bright embodiment provides a kind of determination method for fault tectonic, which may include step S102 to step
S108。
In step s 102, first selection standard well.
Before selection standard well, need in work area all wells carry out the screening of address section, in conjunction with seismic data into
Row is chosen, and the stratigraphic type of geology locating for the standard well chosen is needed comprising whole stratigraphic types in work area.
Optionally, the standard well is preferably a well, but when the subsurface picture in work area is complicated or work area area
In the case where excessive, the stratigraphic type of geology locating for a well is not comprehensive enough, therefore can choose multiple wells, and by multiple wells
After the stratigraphic type of locating geology is combined, it may include whole stratigraphic types in work area.
In the case where standard well includes multiple wells, can be responsible for a task until it is completed in work area in the stratigraphic type after meeting multiple wells combination
Whole stratigraphic types under the premise of, select the quantity of combined well as few as possible, go on one side carry out next step comparison work,
Reduce work complexity.
Wherein, it in selection standard well, can be sieved according to the grinding property of well logging and log of each well in work area
Choosing.After filtering out standard well, standard summary section can be drawn out according to a well, or be spliced to form according to multiple wells
Draw standard summary section in region.
For example, drilling well combination earthquake work area, first looks for not passing fault or the few well of passing fault carries out preliminary screening,
The well filtered out is classified again, selects a well as standard well according to the underground complexity in the scale in work area and work area
Or select multiple wells as standard well, there is the case where several sedimentary facies belts to divide in conjunction with actual block work area interior span
Corresponding standard well is not made, i.e., can also include multiple standard wells in the same work area, and each standard well can also include
Multiple wells.
In step S104, by stratum locating for each well in same work area respectively with stratum locating for the standard well
Stratum comparison is carried out, determines the individual-layer data and breakpoint data of the tomography in the work area.
It, can be by the mistake for crossing well profile figure and standard well of each well in the case where the standard well only includes a well
Well profile figure is compared, to determine the depth data etc. of individual-layer data and breakpoint at tomography.
In the case where the standard well includes multiple wells, first the well profile data of crossing of multiple wells are integrated, are drawn
The well profile figure of crossing of each well is compared, with true by a standard summary sectional view out with the standard summary sectional view of drafting
Determine the depth data etc. of the individual-layer data and breakpoint at tomography.
In step s 106, according to the primitively prime number at the tomography accordingly and determine the tomography individual-layer data
With breakpoint data, fault tectonic explanation is carried out, and determines layer distribution situation.
Specifically, determining individual-layer data and breakpoint data are imported into earthquake work area, (the earthquake work area includes original
Geologic data and seismic data), so that it may realize that combining breakpoint data to shake section progress tomography over the ground finely identifies and explain, it will
Fault interpretation precisely implemented to well profile, additionally it is possible to determine the layer distribution situation of the tomography in work area.
In step S108, is explained according to the fault tectonic and the layer distribution situation draws subsurface structure depth etc.
Value figure.
The subsurface structure depth isopleth map can clearly and accurately show the distribution situation of the tomography in work area.And
And the technical solution provided through the embodiment of the present invention, the accuracy of tomography judgement can be improved, provide theory for later stage work
Foundation.
Wherein, according to the structure interpretation completed in step s 106, tomography can be calculated and describe element, such as tomography breaks
Away from, data such as length, trend and inclination angle.Wherein, the length and trend of the tomography can directly determine, and the turn-off of tomography includes
The inclination angle of heave and vertical displacement, the tomography can be calculated by heave and vertical displacement.
Classify further, it is also possible to describe element according to identified tomography to tomography, and determines sorted difference
The trend of the tomography of rank.
Wherein, according to professional standard, generally can be divided into four ranks according to faulting scale: the first-order faults are control
The major fault of area deposition basin, sedimentary system and structural evolution, general extended distance are more than 100 and hundreds of kilometer disconnected
Layer；Second level tomography is the tomography for controlling sedimentary basin internal structure screen work and structural unit, and extended distance is tens kilometers or more
Tomography；Three-level tomography is the main fracture of fracture belt structural belt, main to control basin boundary and in-built tomography, is extended
Distance is several kilometers or more；Level Four tomography is the derivation tomography of three-level tomography, and extended distance is the tomography of several hundred rice or more.Work
Personnel can select suitable length standard according to work area actual conditions to determine the rank of tomography.
Determining walking backward for tomography rank and different tomographies, can according to the subsurface structure depth isopleth map drawn,
Fracture system flat distribution map is drawn, to show the plane distribution situation of the tomography of the different stage in the work area.It is described disconnected
It splits System planes distribution map and belongs to schematic diagram, can clearly and intuitively show the plane distribution situation of tomographies at different levels.
Mistake or the biggish feelings of data error are calculated in view of being likely to occur when carrying out step S104 and step S106
Condition, will lead to that determining tomography distribution situation is not accurate enough, and therefore, the technical solution that this embodiment of the invention mentions additionally provides one
Kind correction and constrained procedure.Specifically, can analyze out tectonic stress to fracture system according to fracture system flat distribution map
It influences and the phase is secondary, and the fracture in what direction should be generated, it can be from correction in Fracture and the fracture about in beam work area
The trend and combination of system.
Technical solution provided in an embodiment of the present invention, in work area fault strike and combined situation theoretical foundation is provided,
The precision of the tectonic ore-forming in work area is greatly improved, and passes through verification experimental verification, which has very high practical application
Value.
Technical solution provided by the invention is now explained with a specific embodiment.
Fig. 2 is the oil field SNS aperture leakage standard well histogram.If geology locating for the most wells in work area is generally existing
A certain particular lithologic can be chosen to index bed if oil shale is generally developed on 23 stratum of hole in Fig. 2, by work area its
Stratum locating for his well is compared with the index bed, to determine the individual-layer data and breakpoint data of the tomography in work area.
Fig. 3 is the oil field SNS aperture leakage fracture system flat distribution map, can after tectonic interpretation and tectonic ore-forming
Element is described to count the tomography of all tomographies in work area, the data such as turn-off, length, trend and inclination angle including tomography, then
According to fracture system classification standard, the tomography in work area can be classified, the present embodiment is related to the main fracture system in work area and is
The tomography of three-level and following rank, by the tomography of the tomography of statistics describe the rank of element and tomography by Fig. 4 show come.Example
Such as, as shown in figure 4, to the north of the trend of work area three-level fracture system is equal east based on, level Four fracture system with east northeast east to
Tomography based on.
Due to there are multiple fault blocks in the intra-field same work area SNS, skill provided by the invention is now explained by taking fault block N90 as an example
Art scheme.
N90 fault block is located at SNS oil field development area east, and main force's oil-bearing series is Neogene system hole shop group aperture leakage, the block
Only a well belongs to non-producing reserves block, 16 meters/7 layers of the well aperture leakage oil reservoir, and 11 meters/4 layers of low yield oil reservoir, compacted zone
85.09 meters.6.5t/d is rolled over after tested production value pressure break, due to belonging to low porosity and low permeability reservoir, in addition old well before more than 20 years, considers at that time
Production technology is undeveloped, and production yield only has 2t/d, and tested production value is low, but reserves scale is big, employs potentiality, therefore to this
Block construction is implemented again.
As shown in figure 5, when carrying out seismic profile interpretation, the seismic profile for crossing N90 well is in implementing construction process
Near tectonic transition section, there are multi-solution, former interpretation scheme is passed through in Fig. 5 with dash-dotted gray line position for the explanation of tomography.However
When the technical solution provided according to embodiments of the present invention draws fracture system flat distribution map, as shown in fig. 3, it was found that N90 tomography
Belong to region three-level tomography, see the tomography rank of Fig. 4 statistics and the relationship in direction, determines three-level fault plane trend with north north east
Based on direction, level Four fault strike be east northeast east to, according to Fig. 3 and tectonostress think three-level tomography formation be by
The CX fracture system in work area western part influences, and with the extension of north north east direction, the later period is influenced by the Kongxi fault of work area east, in work area
East tomography is with east northeast east to extension.For N90 fault throw at 250 meters or more, fault length is more than 10 kilometers, while by N90
The stratigraphic section of standard well in stratigraphic section and work area described in well compares, it is found that there are two breakpoints, one of them is disconnected
Point is located at one section of hole stratum, another breakpoint location is compared to the downward that has of former breakpoint location, and N90 tomography breaks in N90
Bottom.As shown in fig. 6, solid black lines representative is again practicable structure interpretation tomography, dotted line represents former structure interpretation
Tomography, the interpretation scheme of N90 well north side N90 tomography have great adjustment, and former interpretation scheme interrupting layer trend is in N90 well north side
To the north of east to extension, in neotectonics, as shown in fig. 6, N90 tomography is in N90 well east side.Pass through a series of fault parameters and reason
By combining, the interpretation scheme of tomography on section is had modified, the precision of structure interpretation is greatly improved.
Fig. 8 is the subsurface structure depth isopleth map of the N90 fault block in the oil field SNS, according to Fig. 8, carries out scheme portion to N90 block
Administration disposes new well a bite NK46-61 well in N90 Jing Xibeichu, and new well coordinate is located at breakpoint on former structural map, sees Fig. 7,
Be in same fault block with N90 on neotectonic map, after new well finishing drilling, through with regional stratum section to after breakpoint location and seismic profile
It coincide, former interpretation scheme interrupting layer is just broken in 21 oil group of target zone hole, and breakpoint is on top after new JingNK46-61Jing verifying
One intersegmental part of earth bore, 21 stratum of hole is complete, and new JingNK46-61Jing has certain production capacity after implementing.Test proves that the skill
Art theory and practical combine achieve extraordinary application effect.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously
The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
It will be appreciated by those skilled in the art that implementing the method for the above embodiments is that can pass through
Program is completed to instruct relevant hardware, which is stored in a storage medium, including some instructions are used so that single
Piece machine, chip or processor (processor) execute all or part of the steps of each embodiment the method for the application.And it is preceding
The storage medium stated includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory
The various media that can store program code such as (RAM, Random Access Memory), magnetic or disk.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (6)
1. a kind of determination method for fault tectonic, which is characterized in that the described method includes:
Selection standard well, the stratigraphic type of geology locating for the standard well include whole stratigraphic types in work area；
Stratum locating for each well in same work area is carried out stratum with stratum locating for the standard well respectively to compare, is determined
The individual-layer data and breakpoint data of tomography in the work area；
According to the primitively prime number at the tomography accordingly and determine the tomography individual-layer data and breakpoint data, break
Layer structure interpretation, and determine layer distribution situation；And
It is explained according to the fault tectonic and the layer distribution situation draws subsurface structure depth isopleth map.
2. the method according to claim 1, wherein the standard well includes a well or including same work area
Interior multiple wells,
Wherein, when the standard well includes a well, the stratigraphic type of geology locating for described a well includes in the work area
Whole stratigraphic types；
When the standard well includes the multiple wells in same work area, the stratigraphic type of the geology of the multiple wells combination includes described
Whole stratigraphic types in work area.
3. the method according to claim 1, wherein the method also includes:
The standard well is determined according to the well logging lithology and log of each well in work area；And
Standard summary sectional view is drawn according to the corresponding well logging lithology of the standard well and log.
4. the method according to claim 1, wherein the method also includes:
It is explained according to the fault tectonic, determines that tomography describes element,
Wherein, it includes fault throw, length, trend and inclination angle that the tomography, which describes element,.
5. according to the method described in claim 4, it is characterized in that, the method also includes:
Element is described according to the tomography to be classified the tomography in the work area；
According to the subsurface structure depth isopleth map, fracture system flat distribution map is drawn, to show the difference in the work area
The plane distribution situation of the tomography of rank.
6. according to the method described in claim 5, it is characterized in that, the method also includes:
Influence and fault strike of the tectonic stress to fracture system are determined according to the fracture system flat distribution map, to described disconnected
The trend for splitting the tomography in system is corrected and constrains.
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Cited By (2)
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| CN113204855A (en) * | 2020-02-03 | 2021-08-03 | 中国石油天然气股份有限公司 | Stratum shortening rate determining method, system, equipment and readable medium |
| CN114060022A (en) * | 2021-11-25 | 2022-02-18 | 西南石油大学 | Shale gas productivity prediction method based on multi-scale fault development characteristics |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113204855A (en) * | 2020-02-03 | 2021-08-03 | 中国石油天然气股份有限公司 | Stratum shortening rate determining method, system, equipment and readable medium |
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| CN114060022A (en) * | 2021-11-25 | 2022-02-18 | 西南石油大学 | Shale gas productivity prediction method based on multi-scale fault development characteristics |
| CN114060022B (en) * | 2021-11-25 | 2022-08-05 | 西南石油大学 | Shale gas productivity prediction method based on multi-scale fault development characteristics |
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Effective date of registration: 20201130 Address after: 100000 Beijing city Dongcheng District No. 16 Andrew Applicant after: PetroChina Co.,Ltd. Address before: 300280 Dagang three, Binhai New Area, Tianjin Applicant before: CNPC DAGANG OILFIELD BRANCH Co. |
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Application publication date: 20190308 |