CN109212627A - A kind of thin layer description and increasing the storage scale determination method based on subdivision series of strata - Google Patents
A kind of thin layer description and increasing the storage scale determination method based on subdivision series of strata Download PDFInfo
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- 230000015572 biosynthetic process Effects 0.000 claims description 7
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- 239000004519 grease Substances 0.000 claims description 3
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- 150000002430 hydrocarbons Chemical class 0.000 claims description 3
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- 238000004321 preservation Methods 0.000 claims description 2
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
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- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/62—Physical property of subsurface
- G01V2210/624—Reservoir parameters
- G01V2210/6244—Porosity
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- G—PHYSICS
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
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Abstract
The invention discloses a kind of thin layer descriptions and increasing the storage scale determination method based on subdivision series of strata, belong to petroleum exploration and development technical field.First preexisting fault-lithology, depositional trap development area, the subdivision series of strata development thin reservoir of geology is portrayed and Seismic Reservoir Prediction, the two combine, and the earthquake attribute volume preferably to match with thin Reservoir Depositional Characteristics is sliced to portray single sand body boundary；The distributed areas of high-quality thin reservoir and the position of lithologic plugging band are successively combed again, realize the fine description of thin Over Reservoir Spreading Characteristics；Then efficiency analysis is carried out to the thin reservoir layering system implemented, determines that the physical property lower limit of effective reservoir, the dry poor layer of screening removal draw a circle to approve the spatial distribution region of effective reservoir；The oil bearing property analysis for finally carrying out trap in effective reservoir distributed area obtains the increasing the storage scale of single layer, then the increasing the storage scale of target REGION OF WATER INJECTION OILFIELD is determined by the mode that series of strata are superimposed, and realizes the overall evaluation of block resource potentiality.
Description
Technical field
The present invention relates to a kind of thin layer descriptions and increasing the storage scale determination method based on subdivision series of strata, belong to oil exploration
Development technique field.
Background technique
With the raising of degree of prospecting, remaining petroleum resources to be found are more and more hidden, and exploration and development object is increasingly
Complexity is the main neck of the volume increase of original oil zone increasing the storage at this stage using thin reservoir as the lithology of Dominated Factors, tomography-lithologic deposit
Domain, but can how the petroleum resources rich region and potential to add reserves of this kind of oil reservoir embody, form scale, the distribution of High-quality Reservoir
How the specific location of region and lithologic plugging band defines, the emphasis of the person that is current research concern.
The potential to add reserves for original oil zone has carried out many researchs in recent years, including reservoir forming factor dissection, Reservoir model are ground
Study carefully with Hydrocarbon Enrichment Regularity research etc., obtain including the multinomial achievement such as petroleum distribution global regularity and potential to add reserves direction.But
It is to solve the exploration difficult problem and technical bottleneck currently faced with regard to how to realize potential to add reserves refinement and quantization, there are no too thin
The scheme of cause and effective implementation method, not yet formation complete set for thin layer description and potential to add reserves is careful comments
The application study system of valence, this seriously affects the success that lithology, tomography-lithological reservoir exploration under thin reservoir control are developed
Rate.
Therefore, it is necessary to pointedly research and develop thin layer description and the increasing the storage rule of a kind of suitable original oil zone subdivision series of strata identification
Mould determines method.
Summary of the invention
The object of the present invention is to provide a kind of thin layer descriptions and increasing the storage scale determination method based on subdivision series of strata, with solution
The subtle trap identification certainly faced in the exploration process of original oil zone is difficult, reservoir portrays unclear, potential to add reserves and the discovery of scale reserves is difficult
Etc. technical problems.
In order to achieve the goal above, the technical scheme adopted by the invention is that:
A kind of thin layer description and increasing the storage scale determination method based on subdivision series of strata, comprising the following steps:
1) by fine Strata Comparison, sedimentation unit is divided；
2) sedimentary micro and sandstone Distribution Characteristics of minimal deposition unit reservoir are successively studied, the determination of layering system is excellent
Zhi Bao reservoir development area and the position of lithologic boundary；
3) carry out fine synthesis record and shakeout experimental analysis, the seismic response of thin reservoir is determined by amplitude change rate；
4) it is chosen in thin seismic reservoir reflection upper and lower part and refers to seismic reflection layer, carried out the explanation of seismic event plane and chase after
Track, window layer production earthquake attribute volume slice when then being chosen above and below reference seismic reflection layer；
5) the earthquake attribute volume slice that selection matches with thin Reservoir Depositional Characteristics, complete the geologic interpretations of seismic properties with
It portrays on Reservoir Distribution boundary；
6) physical property characteristic and lithologic character for analyzing reservoir determine the physical property lower limit of effective reservoir, and poor layer is done in screening removal,
Draw a circle to approve the spatial distribution region of effective reservoir；
7) it is basic geologic element with single layer, in conjunction with reservoir, construction, grease matching relationship and Production development, determines effective
The oiliness of reservoir distribution area trap obtains the increasing the storage scale of single layer；
8) according to series of strata overlay model, effective layer trap is superimposed, obtains the increasing the storage scale of target REGION OF WATER INJECTION OILFIELD.
The comparison principle that fine Strata Comparison is promoted layer by layer using " point-line-face " in step 1).
Sedimentation unit is divided in step 1) and refers to the criteria for classifying with Reference well, from thick to thin, is divided into group, sand group, small
Four kinds of layer, single sand body units.
The research of sedimentary micro and sandstone Distribution Characteristics includes big phase, small phase research in step 2), with substratum and single sand body
The Analysis of Sediment Source and rock phase carried out for formant, well logging phase, section phase, plane is mutually studied and sand body plane, cuts open
The research of face Distribution Characteristics.
High-quality storage thin layer refers to that single sand body thickness is more than or equal to 2 meters of river, sand dam and sheet sand in step 2).
Amplitude change rate refers to the wave crest that single sand body calibration position is neighbouring in synthetic seismogram in step 3)
Or the ratio between wave crest or trough amplitude value before the amplitude and shakeout after trough shakeout.
Refer to the same phase of earthquake on seismic profile with geology isochronic plane meaning in step 4) with reference to seismic reflection layer
Axis has reflection steady and continuous on seismic profile, is easy to the characteristics of tracking.
The method that the production that earthquake attribute volume is sliced in step 5) needs to select to be most suitable for set construction and formation conditions, packet
Include the top method that is parallel to, be parallel to bottom method, equal proportion interpolation method and progressive interpolation method etc..
Effective reservoir refers to the reservoir that commercial oil can be obtained under the conditions of prior art in step 6).The physical property of effective reservoir
Lower limit includes three porosity, permeability and oil saturation parameters.Statistical self similarity method is mainly used in actual production, by local area
The dry of block formation testing pilot production verifying, oil, water layer take statistics analysis, integrate the physical property lower limit value for obtaining effective reservoir.General choosing
Porosity is taken to be greater than 15%, permeability is greater than 50 × 10-3μm2, reservoir of the oil saturation greater than 35% is as effective reservoir
Physical property lower limit.Specifically, effective reservoir physical property lower limit reference value can also be determined according to the actual conditions in each oil field.
The determination of oiliness refers to the reliability according to trap, hydrocarbon charge degree, preserves probability, later period preservation in step 7)
The trap oil-containing probability obtained after integrity degree is comprehensive chooses 0.7,0.5,0.5,0.8 respectively, and oil-containing probability is greater than 14% circle
It closes as effective Oil Trap.
The determination of increasing the storage scale is based on subdivision series of strata in step 7), is basic geologic element with single layer, using volumetric method
The stock number of layer trap is calculated.
Beneficial effects of the present invention:
The present invention is difficult for the subtle trap identification faced in the exploration process of original oil zone, lithology, fault-lithological oil pool it is excellent
Matter reservoir development area and lithologic plugging boundary are portrayed unclear, and potential to add reserves and the difficult problem of scale reserves discovery are primarily based on essence
Thin Strata Comparison divides fine sedimentation unit, and using substratum or single sand body as benchmark unit, the sedimentary micro of reservoir is portrayed by layering system
And sandstone Distribution Characteristics, specify the general location of high-quality thin reservoir development area and lithologic boundary；Carry out fine reservoir interpretation simultaneously,
By composite traces and shakeout experimental analysis, the seismic response of thin reservoir is determined using amplitude change rate size；In thin reservoir
Shake reflection upper and lower part, which is chosen, refers to seismic reflection layer, carries out the interpretive tracing of seismic event plane, on reference seismic reflection layer
Under open when taking window layer production earthquake attribute volume slice；By browsing stratum body slice, preferably match with thin Reservoir Depositional Characteristics
Earthquake attribute volume be sliced to portray single sand body boundary, realize the geologic interpretation of seismic properties and the fine quarter on Reservoir Distribution boundary
It draws；Then efficiency analysis is carried out to the thin reservoir layering system implemented, using well logging, landwaste and chemical examination data, analyzes reservoir
Physical property characteristic, lithologic character, determine the physical property lower limit of effective reservoir, the dry poor layer of screening removal draws a circle to approve the space of effective reservoir
Distributed areas；It is finally basic geologic element with single layer, Study In Reservoir, construction, grease matching relationship are ground in conjunction with Production development
The oiliness for studying carefully the trap of effective reservoir distributed area obtains the increasing the storage scale of single layer, then by the mode of series of strata superposition, by effective layer
Trap is superimposed, comprehensive to determine target REGION OF WATER INJECTION OILFIELD increasing the storage scale, realizes the purpose of the block resource potentiality overall evaluation.The party
Method has the characteristics that fining, systematization, economization and effective, practical, the oil gas that can be applied under the conditions of identical geology
In exploration and development, there is good society and economic value.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for the present invention；
Fig. 2 is that the area BD joins well fine correlation figure in embodiment 1；
Fig. 3 is the area BD H3Ⅱ102Shakeout experimental analysis；
Fig. 4 is the area BD H3Ⅱ102Substratum reservoir calibration and upper and lower reference layer are chosen；
Fig. 5 is the area BD H3Ⅱ102Substratum 28Hz spectral decomposition attribute stratum body slice；
Fig. 6 is the area BD H3Ⅱ102Sublayer sedimentary microfacies figure；
Fig. 7 is the area BD H3Ⅱ102Substratum sandstone spread figure；
Fig. 8 is the area BD H3Ⅱ102Substratum porosity plan view；
Fig. 9 is the area BD H3Ⅱ102Substratum permeability plan view；
Figure 10 is the area BD H3Ⅱ102Substratum wavelet decomposition reconstruct image；
Figure 11 is the area BD H3Ⅱ102Substratum potential to add reserves distinguishes Butut.
Specific embodiment
Only invention is further described in detail for following embodiments, but does not constitute any limitation of the invention.
Embodiment 1
Fig. 1 show the flow diagram of thin layer description and increasing the storage scale determination method based on subdivision series of strata.First
In tomography-lithology, depositional trap development area, the subdivision series of strata development thin reservoir of geology is portrayed and Seismic Reservoir Prediction, the two are mutually tied
It closes, by browsing stratum body slice, the earthquake attribute volume preferably to match with thin Reservoir Depositional Characteristics is sliced to portray single sand body
The geologic interpretation of seismic properties and the meticulous depiction on Reservoir Distribution boundary are realized in boundary.Successively comb the distribution of high-quality thin reservoir
Region and the position of lithologic plugging band, realize the fine description of thin Over Reservoir Spreading Characteristics.Then the thin reservoir implemented is layered
System carries out efficiency analysis, determines that the physical property lower limit of effective reservoir, the dry poor layer of screening removal draw a circle to approve the spatial distribution of effective reservoir
Region.The oil bearing property analysis for finally carrying out trap in effective reservoir distributed area obtains the increasing the storage scale of single layer, then is superimposed by series of strata
Mode, it is comprehensive to determine target REGION OF WATER INJECTION OILFIELD increasing the storage scale, the purpose of the block resource potentiality overall evaluation is realized, to improve probing
Success rate.
By BD area for, this method specifically includes the following steps:
1) by carrying out the fine Strata Comparison of the whole district to the area BD, choosing most full B370, B280 well of formation thickness is mark
8 of target zone Nuclear scan oily groups are subdivided into 76 sand groups, and be further subdivided into 114 single layers, single sand is thick by quasi- well
Degree is the thin reservoir of 2m, 4m, 6m；
2) the fuel-displaced substratum of emphasis and potentiality layer in single layer are chosen, plane, section tracking between well, layer-by-layer clear single layer are carried out
Sedimentary micro and sandstone Distribution Characteristics, No. 2 sand bodies of II 10 substratum of H3 be the main oil-containing substratum in the area BD, development divides under water
Fluid stream channel, interchannel deposition, thickness in monolayer is 6.2 meters maximum, and in the wellblock B388, B370, there are variation of lithological, see Fig. 2, Fig. 6 and figure
7；
3) to the area BD H3II 10 No. 2 substratums carry out Fine Reservoir calibration, which is scheduled on wave in seismic profile subscript
At the zero phase of paddy and wave crest turnover, by carrying out the amplitude change rate that shakeout experimental analysis finds wave crest after shakeout to the substratum
It is greater than the amplitude change rate of trough, it is believed that H3II 10 No. 2 substratums are mainly rendered as weak peak reflection on seismic profile
Feature is shown in Fig. 3；
4) to the area BD H3The small layer plane tracking of No. 2 of II 10, and choose the same phase of seismic reflection at the substratum or more 25ms
Axis carries out plane interpretive tracing as explanation reference layer, and production is sliced along layer earthquake attribute volume, sees Fig. 4 and Fig. 5；
5) on the basis of reservoir sedimentation and sandbody distribution describe, the earthquake category that preferably matches with thin Reservoir Depositional Characteristics
Property body slice to portray single sand body boundary, realize the geologic interpretation of seismic properties and the meticulous depiction on Reservoir Distribution boundary, be layered
System implements the planar distribution feature of reservoir, sees Fig. 6 and Fig. 7；
6) on the basis of clearly thin reservoir development area and the boundary distributed area of lithologic plugging band, carry out the effective of thin reservoir
Property and oil bearing property analysis, first tracking reservoir porosity, permeability plane distribution situation, draw a circle to approve the distributed areas of effective reservoir,
Then carry out reservoir, construction, deposition matching relationship research, find tomography-depositional trap, and mention to the lineups of thin reservoir calibration
Frequency dividing wavelet (see Fig. 8, Fig. 9 and Figure 10) is taken, in conjunction with oil-gas migration mode, carries out trap oil bearing property analysis, obtains trap oil-containing
Probability；
7) single layer increasing the storage scale analysis is carried out to the trap of prediction oil-containing, by single layer trap area, core intersection, single layer list
It stores up the parameters such as coefficient, filling coefficient, trap oil-containing probability and calculates volume stock number, the final mode by series of strata superposition is comprehensive true
Determine region increasing the storage scale, realizes the purpose of the block resource potentiality overall evaluation, see Figure 11.
It is explored by early period, the area BD has obtained preferable effect in this implementation, implements H altogether3Ⅱ101、H3Ⅱ102、H3Ⅲ22、
H3Ⅲ112Four potential to add reserves layers, it is contemplated that newly-increased oil area 5km2, increase prognostic reserves 185 × 10 newly4t；In H3Ⅱ102Substratum
It is expected that newly-increased oil area 2.24km2, increase prognostic reserves 92 × 10 newly4t；It is bored in the wellblock B382-1, B421 and meets oil reservoir, wherein
The wellblock B421 fault-lithological oil pool, in H3Ⅱ102Substratum, which bores, meets 4.1m thick oil pay, the net pay zone of formation testing highest day oil-producing 13.2t,
It is expected that newly-increased verified oil oil in place 41 × 104t；B382-1 well fault-lithological oil pool, highest day oil-producing 5t, production 510
It, adds up 1053.6 tons of oil-producing, it is contemplated that newly-increased verified oil oil in place 30 × 104t。
Claims (10)
1. a kind of thin layer description and increasing the storage scale determination method based on subdivision series of strata, it is characterised in that: the following steps are included:
1) by fine Strata Comparison, sedimentation unit is divided；
2) sedimentary micro and sandstone Distribution Characteristics of minimal deposition unit reservoir are successively studied, the determination of layering system is high-quality thin
Reservoir development area and the position of lithologic boundary；
3) carry out fine synthesis record and shakeout experimental analysis, the seismic response of thin reservoir is determined by amplitude change rate；
4) it is chosen in thin seismic reservoir reflection upper and lower part and refers to seismic reflection layer, carry out the interpretive tracing of seismic event plane, so
Window layer production earthquake attribute volume slice when being chosen above and below reference seismic reflection layer afterwards；
5) the earthquake attribute volume slice that selection matches with thin Reservoir Depositional Characteristics, completes the geologic interpretation and reservoir of seismic properties
It portrays on spread boundary；
6) physical property characteristic and lithologic character for analyzing reservoir determine the physical property lower limit of effective reservoir, the dry poor layer of screening removal, delineation
The spatial distribution region of effective reservoir；
It 7) is that basic geologic element determines effective reservoir in conjunction with reservoir, construction, grease matching relationship and Production development with single layer
The oiliness of distributed area trap obtains the increasing the storage scale of single layer；
8) according to series of strata overlay model, effective layer trap is superimposed, obtains the increasing the storage scale of target REGION OF WATER INJECTION OILFIELD.
2. according to the method described in claim 1, it is characterized by: fine Strata Comparison uses point-line-surface layer layer in step 1)
The comparison principle of propulsion.
3. according to the method described in claim 1, it is characterized by: dividing sedimentation unit in step 1) refers to drawing with Reference well
Minute mark is quasi-, from thick to thin, is divided into four kinds of group, sand group, substratum, single sand body units.
4. according to the method described in claim 1, it is characterized by: in step 2) sedimentary micro and sandstone Distribution Characteristics research
Including big phase, small phase research, the Analysis of Sediment Source and rock phase carried out using substratum and single sand body as formant, well logging phase,
Section phase, plane are mutually studied and sand body plane, the research of section Distribution Characteristics.
5. according to the method described in claim 1, it is characterized by: high-quality storage thin layer is in step 2) for clastic deposited sediments
Refer to that single sand body thickness is more than or equal to 2 meters of river, sand dam and sheet sand.
6. according to the method described in claim 1, it is characterized by: amplitude change rate refers in synthetic seismogram in step 3)
Wave crest or trough amplitude value before amplitude and shakeout after single sand body calibration position neighbouring wave crest or trough shakeout
The ratio between.
7. according to the method described in claim 1, it is characterized by: referring to reference to seismic reflection layer in seismic profile in step 4)
The upper seismic event with geology isochronic plane meaning.
8. according to the method described in claim 1, it is characterized by: the production that earthquake attribute volume is sliced in step 5) is selected from parallel
Yu Dingfa, bottom method, equal proportion interpolation method, any one in progressive interpolation method are parallel to.
9. according to the method described in claim 1, it is characterized by: in step 6) effective reservoir physical property lower limit are as follows: porosity
Greater than 15%, permeability is greater than 50 × 10-3μm2, oil saturation is greater than 35%.
10. according to the method described in claim 1, it is characterized by: the determination of step 7) oiliness refer to according to trap can
By degree, hydrocarbon charge degree, preserve probability, the comprehensive trap oil-containing probability obtained of later period preservation integrity degree.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110703354A (en) * | 2019-10-23 | 2020-01-17 | 中国石油化工股份有限公司 | Lithology boundary identification method based on well-seismic combination |
| CN112034513A (en) * | 2020-09-03 | 2020-12-04 | 中海石油(中国)有限公司 | Quantitative evaluation method for peripheral potential resource quantity of developed oil field |
| CN113514883A (en) * | 2021-06-18 | 2021-10-19 | 中国石油化工股份有限公司 | Fault-lithologic reservoir depicting method |
| CN114019566A (en) * | 2021-11-04 | 2022-02-08 | 北京诺克斯达石油科技有限公司 | Thin interbed prediction method for continuous surface block stratigraphic slices |
| CN114428368A (en) * | 2020-10-15 | 2022-05-03 | 中国石油化工股份有限公司 | Shallow light spot gas distribution fine engraving method |
| CN114548816A (en) * | 2022-03-02 | 2022-05-27 | 西南石油大学 | Lake facies shale oil geological evaluation method and system |
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