CN108487903A - A kind of gentle slope area oil gas advantage dust trajectory quantitatively portrays characterizing method - Google Patents
A kind of gentle slope area oil gas advantage dust trajectory quantitatively portrays characterizing method Download PDFInfo
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- 230000008901 benefit Effects 0.000 title claims abstract description 29
- 239000000428 dust Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000004576 sand Substances 0.000 claims abstract description 24
- 230000005012 migration Effects 0.000 claims abstract description 14
- 238000013508 migration Methods 0.000 claims abstract description 14
- 238000009826 distribution Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000012546 transfer Methods 0.000 claims abstract description 5
- 238000011161 development Methods 0.000 claims abstract description 3
- 239000004575 stone Substances 0.000 claims description 11
- 238000003325 tomography Methods 0.000 claims description 9
- 230000001186 cumulative effect Effects 0.000 claims description 5
- 238000011160 research Methods 0.000 claims description 5
- 208000035126 Facies Diseases 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 4
- 239000003208 petroleum Substances 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims description 3
- 230000005945 translocation Effects 0.000 claims description 3
- 230000018109 developmental process Effects 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims 1
- 230000011218 segmentation Effects 0.000 claims 1
- 238000012795 verification Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000037361 pathway Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
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- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a kind of gentle slope area oil gas advantage dust trajectories quantitatively to portray characterizing method, includes the following steps：Step A, it identifies plane of unconformity, divides two carrier beds up and down, specify plane of unconformity to oil gas lateral migration control action；Step B, main purpose layer sandstone percent content is portrayed, sand body connectivity modeling is established, analyzes the connectivity of carrier bed；Step C, lateral fault sealing and openability are quantitatively portrayed；Step D, comprehensive plane of unconformity, sandstone connectivity, fault transfer, overlapping oily show that index determines gentle slope area plane advantage dust trajectory.It is Accurate Prediction terrestrial lake basin gentle slope area oil-gas distribution present invention aims at a kind of method using Production development data prediction oil gas advantage dust trajectory is provided, preferably Beneficial Zones of Exploring provides scientific basis.
Description
Technical field
The present invention relates to one kind quantitatively portraying characterizing method, and specially a kind of gentle slope area oil gas advantage dust trajectory is quantitatively carved
Characterizing method is drawn, oil exploration technology field is belonged to.
Background technology
Oil gas is generated to Aggregation indica in reservoir from hydrocarbon source rock, necessarily experiencings oil-gas migration process, it is contact into hydrocarbon
To the tie at Tibetan, therefore oil-gas migration and the research of transporting condition directly affect oil and gas accumulation position.East China contains
The main migration path system of oil-and-gas basin includes tomography, sand body, unconformity and combinations thereof, due to transporting type, configuration and distribution tool
There is a very strong anisotropism, oil gas is carried out along the predominant pathway of resistance minimum in the migration process of underground, previous research
Reservoir model and the petroleum distribution rule that qualitative analysis is carried out to the control action of oil-gas migration usually from section, and is thus established
Rule can not effectively instruct well site deployment, restrict oil field prospecting.According to drilling well, earthquake and creation data how using quantitative
Evaluation means establish plane of unconformity, tomography, the cooperation transporting feature on sand body solid space, be research all the time into Tibetan
The difficult point of dynamics critical issue, in view of the above problems, fixed the present invention is directed to summarize a kind of gentle slope area oil gas advantage dust trajectory
Amount portrays characterization method.
Invention content
The purpose of the present invention be that solve the above-mentioned problems and to provide a kind of gentle slope area oil gas advantage dust trajectory fixed
Amount portrays characterizing method, is the reservoir exploration of terrestrial lake basin sloped region, especially finds out oil gas advantage migration road warp, accurate pre-
Oil-gas distribution is surveyed, preferably Beneficial Zones of Exploring provides practicable technical system.
The present invention is achieved through the following technical solutions above-mentioned purpose, and a kind of gentle slope area oil gas advantage dust trajectory is quantitatively carved
Characterizing method is drawn, is included the following steps：
Step A, on the basis of identifying plane of unconformity, two carrier bed reservoir thickness figures up and down is portrayed, unconformity is analyzed
In face of the control action of oil gas lateral migration；
Step B, main purpose layer sandstone percent content is portrayed, sand body connectivity modeling is established, analyzes the connection of carrier bed
Performance；
Step C, lateral fault sealing and openability are quantitatively portrayed
Step D, comprehensive plane of unconformity, sandstone connectivity, fault transfer, overlapping oily show that index determines gentle slope area
Plane advantage dust trajectory；
Wherein, in step, using following sub-step：
1. on identification individual well plane of unconformity basis, upper and lower two carrier beds are divided, count plane of unconformity or more respectively
Sandstone thickness in 30m；
2. in conjunction with Sedimentary facies, 30m well section reservoir thickness isopleth maps up and down are worked out, Spring layer transporting capability is strong, to have
Imitate migration pathway.
Wherein, in stepb, using following sub-step：
1. according to well data, target zone sandstone percent content (∑ sandstone thickness/layer thickness) is counted, in conjunction with sedimentary facies
Figure works out target zone sandstone percent content distribution map.
2. establishing connected probability model：It is generally acknowledged that sandstone percent content value is bigger, sand body connectivity is better, according to production
Dynamically, it is believed that dried layer sand body is not connected to, and corresponding sandstone percent content is initial connection threshold value C0 at this time, works as C>C0, thenSand body is connected to completely when C=80%.
In formula：P-sand body connected probability；H-sand Asia percentage composition, %；C0-is initially connected to threshold value, c-percent continuity；
3. according to probability function P, the sandstone percent content figure of establishment is converted into degree convergence isogram, high P values area
Domain shows that sand body connectivity is good, and transporting capability is strong.
Wherein, in step C, using following sub-step：
1. using the seismic profile interpretation of each side line, the turn-off size at the obstructed position of tomography is sought.
2. according to the revealed mud stone thickness of prospect pit for meeting fracture is bored, statistics is sought by the cumulative thickness of wrong mud stone.
3. calculating mudstone creep coefficient S SF values, SSF=D/H, it is considered that SSF is smaller, and mud stone continuity is good, can close
Firmly certain oil gas, conversely, SSF is bigger, mud stone poor continuity, at this time tomography play translocation and sought in conjunction with petroleum distribution situation
SSF boundary values, quantitatively characterizing lateral fault sealing ability.
In formula：SSF-mudstone creep coefficient；D-fault throw, m；The mud stone cumulative thickness that H-tomography is staggered.
Wherein, in step D, using following sub-step：
1. joint step A, B, C primarily determine the advantage dust trajectory range of oil gas in the plane.
2. statistic of classification drilling well oily rank thickness calculates the oily index HMIe of individual well target zone, HMIe is drawn
Flat distribution map, HMIe indexes show that more greatly oily rank is high, oil gas by possibility it is big, therefore be superimposed step D 1.
Range, determine the advantage dust trajectory of oil gas in the plane.
Wherein, HMIe=(H oil-containing+H oil immersion+H oil mark+80%H oil stain+25%H fluorescence)/H sandstone
In formula：H oil-containings-oil-containing thickness, unit m；H oil immersions-oil-containing thickness, unit m；H oil marks-oil mark thickness, unit
M, H oil stain-oil stain thickness, unit m；H fluorescence-fluorescence thickness, unit m
The beneficial effects of the invention are as follows：
1) the oily rank disclosed using exploration, calibration plane of unconformity-sand body-fault transfer system is spatially
Comprehensive transporting capability.
2) calculation formula is simple, is related to parameter and is easy to obtain in the means of production of oil field, and reliability is high, can be fast and effective
Ground evaluates oil gas advantage dust trajectory, has good practicability to further Study on hydrocarbon reservoir formation.
Description of the drawings
Fig. 1 is individual well plane of unconformity of the present invention 30m carrier beds delineation up and down；
Fig. 2 is that 30m sandstone dredge a layer isopath map to plane of unconformity of the present invention up and down；
Fig. 3 is that sand body connected probability of the present invention compares relation curve with sandy ground；
Fig. 4 is Es1 sections of sand body connected probability isogram of the present invention；
Fig. 5 is tomography mud stone paint factor statistic histogram of the present invention；
Fig. 6 is Es1 sections of Effective migration channel index isogram of the present invention；
Fig. 7 is Es1 sections of oil gas advantage dust trajectory of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1 shown in -7, this example provides the method that oil gas advantage dust trajectory quantitatively portrays characterization, with discrimination
For the S_1 Formation carrier bed of the south slopes-Cheng Bei, concrete operations are as follows：
1) it identifies plane of unconformity, divides two carrier beds up and down, specify plane of unconformity to oil gas lateral migration control action：
1. there is plane of unconformity in 3735m by analyzing qn2 wells, the sandstone of two carrier beds is thick in not positive upper and lower 30m
Degree is respectively 16m, 12m.(Fig. 1).
2. research area's each well is counted as stated above, in conjunction with Sedimentary facies, 30m well section reservoir thickness up and down is worked out
Isopleth map, Spring layer transporting capability is strong, is Effective migration channel (Fig. 2).
2) main purpose layer sandstone percent content is portrayed, sand body connectivity modeling is established, analyzes the connectivity of carrier bed；
1. establishing connected probability model：According to more than 50 mouth well Production developments, result of log interpretation, statistics shows dried layer and nothing
The corresponding sandy ground ratio of oil/gas show well is 15%, i.e., initially connection threshold value C0It is 15%, when sandy ground ratio is 50%, most of well
There is oil/gas show, i.e. percent continuity C is 50%, by C0, C bring formula intoIt is general to obtain sand body connection
Rate is with sandy ground than relation curve (Fig. 3).
2. according to probability function P curves, sandstone percent content is converted into connected probability, establishment sand body connectivity probability etc.
It is worth line chart (Fig. 4), the discrimination south-high slope Es1 in field of razor clam northxThere are four high P values regions on NW trending, show that sand body connectivity is good, it is defeated
It is strong to lead ability.
3) lateral fault sealing is quantitatively portrayed with openability
The survey line for crossing Mesozoic strata has 14, by seismic profile interpretation, acquire respectively Es1 layers of position turn-off (D1,
D2 ... D14), according to bore meet fracture the revealed mud stone thickness of prospect pit, statistics seek by the cumulative thickness H1 of wrong mud stone,
H2 ... H14), using formula S SF=Di/Hi, (i=1,2 ... 14), acquire mudstone creep coefficient value；Probing shows Es1 sections
For two disk of tomography based on water layer, it is 3.50, i.e. lateral fault sealing that disk, which has oil/gas show, corresponding SSF, only on middle part
Lower limit be 3.5, when SSF values are higher than 3.5, show to be staggered mud stone thickness small, poor continuity, tomography plays translocation at this time
(Fig. 5).
4) comprehensive plane of unconformity, sandstone connectivity, fault transfer, overlapping oily show that index determines gentle slope area plane
Advantage dust trajectory；
1. Es1 sections of oily rank thickness of statistic of classification individual well and sandstone thickness, bring formula HMIe=(H intoOil-containing+HOil immersion+
HOil mark+ 80%HOil stain+ 25%HFluorescence)/HSandstone, individual well Es1 oily index HMIe are calculated, HMIe flat distribution maps (Fig. 6) is drawn, refers to
Number shows that more greatly oily rank is high, oil gas by possibility it is big.
2. overlapping plane of unconformity or more sand body contact relation, sand body connected probability isogram, Lateral fault sealing, containing
Oil/gas show index map, comprehensive descision, which goes out discrimination south-high sloped region in field of razor clam sea, has 4 oil gas advantage dust trajectories (Fig. 7).
Using this method oil gas advantage dust trajectory is quantitatively depicted on the discrimination south slopes-Cheng Bei.It is encountered on dust trajectory
Suitable trap can form oil-gas reservoir, and overlap of beds and unconformity barrier oil-gas reservoir has now been found, improves prospect pit setting ratio,
Searching ground stratotype and lithology-structure type oil-gas reservoir are the increasing the storage fields of reality on advantage dust trajectory, are preferred Favorable Zones
Foundation is provided.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (5)
1. a kind of gentle slope area oil gas advantage dust trajectory quantitatively portrays characterizing method, it is characterised in that：Include the following steps：
Step A, it identifies plane of unconformity, divides two carrier beds up and down, specify plane of unconformity to oil gas lateral migration control action；
Step B, main purpose layer sandstone percent content is portrayed, sand body connectivity modeling is established, analyzes the connectivity of carrier bed；
Step C, lateral fault sealing and openability are quantitatively portrayed；
Step D, comprehensive plane of unconformity, sandstone connectivity, fault transfer, overlapping oily show that index determines gentle slope area plane
Advantage dust trajectory.
2. a kind of gentle slope area oil gas advantage dust trajectory according to claim 1 quantitatively portrays characterizing method, feature exists
In：In step, using lithology joint relationship above and below plane of unconformity, reservoir distribution feature up and down is portrayed, plane of unconformity pair is specified
Oil gas transverse direction translocation：
1. on identification individual well plane of unconformity basis, upper and lower two carrier beds are divided, count plane of unconformity 30m up and down respectively
Interior sandstone thickness；
2. in conjunction with Sedimentary facies, 30m well section reservoir thickness isopleth maps up and down are worked out, wherein Spring layer transporting capability is strong, is
Effective migration channel.
3. a kind of gentle slope area oil gas advantage dust trajectory according to claim 1 quantitatively portrays characterizing method, feature exists
In：In stepb, from the dynamic generation data of drilling well, sand body connected probability model is demarcated, is asked in conjunction with sandstone percent content
Target zone sand body connected probability value is taken, includes mainly the following aspects research contents：
1. according to well data, target zone sandstone percent content is counted, in conjunction with deposition phasor, works out target zone sandstone percent content
Distribution map；
2. according to Production development data, using oil/gas show rank and sandstone percent content relationship, connected probability model P is established,
When sandstone percent content be more than initial connection value, then
In formula：P-sand body connected probability；H-sand Asia percentage composition, %；C0-is initially connected to threshold value, c-percent continuity；
3. according to probability function P, the sandstone percent content figure of establishment is converted into degree convergence isogram.
4. a kind of gentle slope area oil gas advantage dust trajectory according to claim 1 quantitatively portrays characterizing method,
It is characterized in that：In step C, according near Faults petroleum distribution situation, Fault segmentation closing critical value is sought：
1. utilize earthquake, well data, obtain respectively turn-off size, the mud stone that is staggered cumulative thickness；
2. in conjunction near Faults petroleum distribution, lateral fault sealing ability lower limit is judged；
Wherein, SSF is mudstone creep coefficient, and calculating formula is：SSF=D/H
In formula：SSF-mudstone creep coefficient；D-fault throw, m；The mud stone cumulative thickness that H-tomography is staggered.
5. a kind of gentle slope area oil gas advantage dust trajectory according to claim 1 quantitatively portrays characterizing method,
It is characterized in that：In step D, overlapping oily shows index, determines oil gas advantage dust trajectory in plane：
1. joint step A, B, C primarily determine the advantage dust trajectory range of oil gas in the plane；
2. statistic of classification drilling well oily rank thickness calculates the oily index HMIe of individual well target zone, HMIe planes are drawn
Distribution map, the advantage dust trajectory of overlapping verification oil gas in the plane；
Wherein, HMIe=(H oil-containing+H oil immersion+H oil mark+80%H oil stain+25%H fluorescence)/H sandstone
In formula：H oil-containings-oil-containing thickness, unit m；H oil immersions-oil-containing thickness, unit m；H oil marks-oil mark thickness, unit m, H
Oil stain-oil stain thickness, unit m；H fluorescence-fluorescence thickness, unit m.
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| CN113970791A (en) * | 2021-09-28 | 2022-01-25 | 中国石油大学(北京) | Method and system for classification and quantitative evaluation of subsidence basin transportation and guidance system |
| CN114139330A (en) * | 2020-09-04 | 2022-03-04 | 中国石油天然气股份有限公司 | Method and device for determining dominant migration channel of crude oil |
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