CN108691537A - A kind of reservoir geology reserve forecasting method - Google Patents
A kind of reservoir geology reserve forecasting method Download PDFInfo
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- CN108691537A CN108691537A CN201810397912.5A CN201810397912A CN108691537A CN 108691537 A CN108691537 A CN 108691537A CN 201810397912 A CN201810397912 A CN 201810397912A CN 108691537 A CN108691537 A CN 108691537A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The present invention relates to a kind of reservoir geology reserve forecasting methods, are related to the technical field of oil exploration.The reservoir geology reserve forecasting method of the present invention, includes the following steps:(1) computing unit is divided:Plane distribution based on oil reservoir and characteristics of reservoirs divide reserves computing unit on longitudinal direction from bottom to top;(2) data is enrolled:Adjoining area same layer position drilling well, formation testing and well logging are relied on, data is enrolled, specifies Oil Reservoir Types, determine reservoir division standard, individual well effective thickness, crude oil density in stock tank, effecive porosity and oil saturation;(3) reserves calculate.The reservoir geology reserve forecasting method of the present invention can solve the contradiction of oil water relation after development well is implemented, pass through the scrutiny to every reserves parameter, the error that the calculating of reservoir geology reserves can be reduced to the greatest extent has better directive function to the adjustment of oil reservoir development scheme.
Description
Technical field
The present invention relates to the technical fields of oil exploration, it is more particularly related to which a kind of reservoir geology reserves are pre-
Survey method.
Background technology
In Oil Field Exploration And Development initial stage or petroleum resources project are purchased in evaluation procedure, in order to oil field oil and naturally
Gas oil in place is predicted, provides a kind of non-unified oil-water interfaces reservoir reserve quick calculation method in the prior art, should
Method calculates the quick reserves that longitudinal multiple oil reservoirs are regarded as an oil reservoir to carry out, although this method is capable of providing quick meter
It calculates and predicts, but forecasting accuracy is inadequate, it is difficult to the guidance foundation as actual production.Therefore, oil reservoir is according to development plan
It after carrying out deployment implementation, generally requires and oil reservoir is re-recognized and is evaluated, to obtain more rational oil deposit parameter, based on above-mentioned
The oil deposit parameter of acquisition adjusts required reserve forecasting result to complete development plan.In the prior art, oil reservoir prediction geology
Reserves are based primarily upon the explanation of individual well grease, are then based on the individual well grease and explain that determining oil reservoir carries out even well reservoir geology point
Analysis obtains oil-water interfaces;Reservoir Distribution range further according to the core intersection and under the oil-water interface control obtains
Take reservoir reserve.The method of above-mentioned oil reservoir prediction oil in place is mainly for oil reservoir development early period, and data admission is few, oil water relation
Relatively simple oil reservoir is relatively applicable in.However, development well hides understanding after implementing with crude oil has certain or larger difference, oil reservoir is known
Not Ping Jia difficulty it is big, oil water relation is complicated, if the case where not considering the probing of later development well, falls oil deposit parameter again
It is real, reserves are predicted again, development plan adjustment can be made unreasonable.Specifically, for example above by development even well oil reservoir
When geological analysis obtains oil-water interfaces, due to being in initial stage of development, drilling well is less, and the oil domain of prediction may be not accurate enough,
The reservoir reserve error for further calculating acquisition is larger.
Invention content
In order to solve above-mentioned technical problem in the prior art, the purpose of the present invention is to provide a kind of reservoir geology reserves
Prediction technique.
In order to solve to invent the technical problem and realize goal of the invention, present invention employs following technical schemes:
Reservoir geology reserve forecasting method of the present invention, it is characterised in that include the following steps:
(1) computing unit is divided:Plane distribution based on oil reservoir and characteristics of reservoirs are longitudinally dividing finimeter from bottom to top
Calculate unit;
(2) data is enrolled:For the computing unit that step (1) is divided, rely on adjoining area same layer position drilling well, formation testing and
Data is enrolled in well logging;
(3) Oil Reservoir Types are determined:Using the data of step (2), using horizon calibration, full 3 D stereo Fine structural interpretation and
Well shake combines, and determines trap structure;
(4) oil area is drawn a circle to approve:According to the Oil Reservoir Types that step (3) determines, oil-containing is drawn a circle to approve according to trap structure isobath
Area;
(5) calculating parameter is determined:In conjunction with drilling well, formation testing and the well logging gained data in step (2), reservoir division mark is determined
Standard, individual well effective thickness, oil density, effecive porosity and oil saturation;
(6) oil volume factor:B0i=-5.855 × ρ0 2+9.4193×ρo- 2.6101,
In formula:Boi:Oil volume factor, ρ0:Oil density, t/m3;
(7) reserves calculate:According to formulaWith Nz=N ρ0It calculates;
In formula:N- oil in-places, 104m3;Nz- oil in-places, 104t;AoOil area, km2;H- is effectively thick
Degree, m;Effecive porosity, f;SoiInitial oil saturation, f;B0iOil volume factor, zero dimension;ρ0Oil density,
t/m3。
Wherein, the effective thickness described in step (5), by each computing unit according to individual well effective thickness and oil-layer distribution
It sketches effective thickness isopleth, each unit determines effective thickness using the effective thickness isopleth weighing method.
Wherein, the effecive porosity described in step (5), first according to core analysis porosity and log parameter (sound
The wave time difference, compensation density, compensated neutron) correlation analysis is established, the log parameter for selecting correlation best establishes active porosity
Interpretation model is spent, oil reservoir effecive porosity is sought using the model calculating established, and individual well effecive porosity uses the thickness weighing method
It seeks, identical layer position porosity is determined using well point arithmetic average in plane.This method, which can minimize each computing unit, to be had
Imitate the choosing value error of porosity.
Wherein, the oil saturation described in step (5), using well logging calculations incorporated capillary pressure curve method synthesis choosing
It takes.Capillary pressure curve method is exactly that the relationship of oil saturation and oil columns is established according to local area capillary pressure data, according to
Oil column thickness seeks oil saturation;It is according to uses such as resistivity reservoir, effecive porosity, litho-electric parameters that well logging, which calculates,
Empirical equation calculates oil reservoir oil saturation, and individual well oil saturation determines that identical layer position contains in plane using volume balance method
Oily saturation degree is determined using more well arithmetic means.
Reservoir geology reserve forecasting method of the present invention has the advantages that:
The reservoir geology reserve forecasting method of the present invention is by carefully drawing reserves computing unit, after can solving development well implementation
The contradiction of oil water relation can reduce the mistake of reservoir geology reserves calculating to the greatest extent by the scrutiny to every reserves parameter
Difference, reserves result of calculation more meet oil reservoir practical situation, have better directive function to the adjustment of oil reservoir development scheme.
Description of the drawings
Fig. 1 is core analysis porosity and permeability figure in embodiment 1.
Fig. 2 is volume factor and crude oil density in stock tank relational graph in embodiment 1.
Fig. 3 is actual measurement volume factor and calculating volume factor relational graph in embodiment 1.
Specific implementation mode
A kind of reservoir geology reserve forecasting method of the present invention is done further below with reference to specific embodiment
It illustrates, to make more complete and clear explanation to technical scheme of the present invention.
It is specific embodiments of the present invention below, the present invention will be in conjunction with the specific areas X practical geologic information in the block to this hair
Bright oil in place computational methods are further elaborated.It needs to define herein, although embodiment 1 is only with the earthquake in the block of the areas X
Geologic information is analyzed, but the oil in place computational methods of the present invention can equally be well applied to the reserves calculating in other areas, and
And there is prediction effect substantially the same manner as Example 1.
Embodiment 1
For X blocks before development well implementation, comprehensive analysis is structural oil pool, and after development well implementation, structural high part has 1 mouthful
Development well does not bore chance oil reservoir, and comprehensive analysis is lithology-structural oil pool.First according to the areas X oil reservoir genesis analysis and characteristics of reservoirs,
It is divided into N1gII2,N1GIII totally 2 reserves computing units.In conjunction with three dimensional seismic data, calibration layer position the deep piece such as utilizes, along layer
The technologies such as coherence slice implement local area construction, have worked out N1g II2,N1GIII oil reservoirs top surface structural map.N1gII2Oil Reservoir Types are
Lithology-structural oil pool, 7 mouthfuls of wells control in oil area, 3 mouthfuls of well formation testings obtain commercial oils, do not disclose oil-water interfaces, and construction is high
Position A wells do not bore chance oil reservoir, and with half stroke of calculating line of oil reservoir JingBJing and dried layer well A well well spacings, lower location of the structure presses mineral rights boundary
With C well effective thickness accumulated values 10.4m extrapolations along -1491m construction isobath delineations, other directions are fault barrier, and delineation contains
Pasta accumulates 1.07km2;N1GIII is lithology-structural oil pool, in oil area 4 mouthfuls of wells control, 2 mouthfuls of well formation testings obtain industry oil
Stream, does not disclose oil-water interfaces, and structural high part A wells do not bore chance oil reservoir, in terms of half stroke by oil reservoir JingBJing with dried layer well A well well spacings
Line is calculated, lower location of the structure is pressed by D well oil bottom along -1543m construction isobath delineations, and other directions are fault barrier, draw a circle to approve oil-containing
Area 0.42km2。
The delineation of 1 X block oil areas of table is according to table
As can be seen that by the Ω .m of resistivity >=8, porosity >=20% is full in resistivity and the porosity relational graph of Fig. 1
It is set to effective thickness lower limit standard with degree >=45%.
Each computing unit is sketched effective thickness isopleth according to individual well effective thickness and oil-layer distribution feature, and each unit uses
The effective thickness isopleth weighing method determines that effective thickness, X block reserves computing unit effective thickness are distributed in 7.8m-10.4m, in detail
It is shown in Table 2.2 X block effective thickness choosings value of table is according to table
The overburden porosity data obtained according to the area establishes rock core overburden porosity correction public affairs with core analysis porosity
Formula:Φ f=0.976 × Φ rock cores -0.507.According to well-log information and core analyzing data, return in Normalizationof Logging Data and rock core
On the basis of position, corresponding sound wave, density, compensated neutron log value are read, three porosity is established respectively and covers pressure hole with rock core
The relationship of degree, wherein density is best (Fig. 2) with rock core overburden porosity correlation.Density calculates porosity and covers pressure hole with rock core
Porosity carries out error analysis, and relative error meets the regulation of reserves specification between -7.12~5.84%.Porosity model selects
The density model formula for selecting foundation calculates.Formula is as follows:Φ f=-65.542 × ρb+ 171.65 (r=0.923, n=79).
Individual well effecive porosity is weighed using thickness, and identical layer position porosity is averagely determined using well point in plane.
X blocks N1gII27 mouthfuls of 18 layers of wells are calculated, single layer effecive porosity distribution is in 30.0-33.2%, individual well thickness
Tradeoff effecive porosity is distributed between 30.6-33.2%, unit effecive porosity arithmetic mean of instantaneous value 31.6%;N1GIII is calculated
4 mouthfuls of 10 layers of wells, single layer effecive porosity distribution are distributed in 21.2-29.1%, individual well thickness tradeoff effecive porosity
Between 23.5-27.0%, unit effecive porosity arithmetic mean of instantaneous value 25.0%, each unit value is shown in Table 3.
3 X block effecive porosity choosings value of table is according to table
Oil saturation calculates comprehensive choose using capillary pressure curve method combination Archie formula.
First oil saturation and oil columns relationship are established according to parameters such as the pressure mercury data combination fluid properties of acquirement
Scheme (Fig. 3), X blocks N1gII2Oil columns 7m, corresponding oil saturation 65%;N1GIII oil columns 8m, corresponding oil-containing saturation
Degree 66%.
Single layer oil saturation is calculated using Archie formula, and individual well oil saturation selects volume balance method to determine, single
First oil saturation is calculated using more well arithmetic means.
X blocks N1gII27 mouthfuls of 18 layers of wells are calculated, single layer oil saturation is distributed between 50.8-71.6%, individual well oil-containing
Saturation distribution range is between 60.8-69.2%, unit oil saturation arithmetic mean of instantaneous value 64.6%;N1GIII calculates 4 mouthfuls
10 layers of well, single layer oil saturation is distributed between 46.1-81.9%, and individual well oil saturation distribution is in 52.5-
Between 71.3%, unit oil saturation arithmetic mean of instantaneous value 65.3%;Each unit oil saturation choosing value is shown in Table 4.
4 X block oil saturation choosings value of table is according to table
Crude oil density in stock tank formation testing measured value, initial gas-oil ratio use steady production gas-oil ratio, volume factor to select
Adjacent block same layer position high pressure property measured value.Specifically choosing value is shown in Table 5 to each unit.
5 X blocks crude oil density in stock tank of table, initial gas-oil ratio, volume factor choosing value are according to table
According to reserves parameter determined above, petroleum-in-place is calculated using volumetric method, is shown in Table 6.It is calculated with Nz=N ρ o.In formula:N, Nz- oil in-place, 104m3, 104t;Ao- contains pasta
Product, km2;H- effective thickness, m;Effecive porosity, f;Soi- initial oil saturations, f;Boi- original oil volumes system
Number, zero dimension;ρ o- crude oil density in stock tank, t/m3。
6 X block incremental oil control reserves tables of data of table
For the ordinary skill in the art, specific example has only carried out the present invention in conjunction with attached drawing exemplary
Description, it is clear that present invention specific implementation is not subject to the restrictions described above, and can choose typical curve combination according to different regions
And rock and mineral component feature, as long as using the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress,
Or it is not improved by the present invention design and technical solution directly apply to other occasions, protection scope of the present invention it
It is interior.
Claims (5)
1. a kind of reservoir geology reserve forecasting method, it is characterised in that include the following steps:
(1) computing unit is divided:Plane distribution based on oil reservoir and characteristics of reservoirs calculate list in longitudinal reserves that divide from bottom to top
Member;
(2) data is enrolled:For the computing unit that step (1) is divided, adjoining area same layer position drilling well, formation testing and survey are relied on
Well enrolls data;
(3) Oil Reservoir Types are determined:Using the data of step (2), shaken using horizon calibration, full 3 D stereo Fine structural interpretation and well
In conjunction with determining trap structure;
(4) oil area is drawn a circle to approve:According to the Oil Reservoir Types that step (3) determines, oil area is drawn a circle to approve according to trap structure isobath;
(5) calculating parameter is determined:In conjunction in step (2) drilling well, formation testing and well logging gained data, determine reservoir division standard,
Individual well effective thickness, oil density, effecive porosity and oil saturation;
(6) oil volume factor:B0i=-5.855 × ρ0 2+9.4193×ρ0- 2.6101,
In formula:B0i:Oil volume factor, ρ0:Oil density, t/m3;
(7) reserves calculate:According to formulaWith Nz=N ρ0It calculates;
In formula:N- oil in-places, 104m3;Nz- oil in-places, 104t;AoOil area, km2;H- effective thickness,
m;Effecive porosity, f;SoiInitial oil saturation, f;B0iOil volume factor, zero dimension;ρ0Oil density, t/m3。
2. reservoir geology reserve forecasting method according to claim 1, it is characterised in that:In step (5), by each calculating
Unit is sketched effective thickness isopleth according to individual well effective thickness and oil-layer distribution, and each unit is weighed using effective thickness isopleth
Method determines effective thickness.
3. reservoir geology reserve forecasting method according to claim 1, it is characterised in that include the following steps:In step
(5) it in, is chosen using porosity model combination core analyzing data, individual well effecive porosity is weighed using thickness, plane
Upper identical layer position porosity is averagely determined using well point.
4. reservoir geology reserve forecasting method according to claim 1, it is characterised in that include the following steps:In step
(5) in, individual well oil saturation selects volume balance method to determine.
5. reservoir geology reserve forecasting method according to claim 4, it is characterised in that include the following steps:Block oil-containing
Saturation degree is calculated using more well arithmetic means.
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| CN110578509A (en) * | 2019-07-27 | 2019-12-17 | 大庆油田有限责任公司 | Encryption adjusting method suitable for horizontal well region of low-permeability oil field |
| CN110609328A (en) * | 2019-09-11 | 2019-12-24 | 大庆油田有限责任公司 | Oil saturation prediction method based on well-seismic combination |
| CN110821484A (en) * | 2019-10-30 | 2020-02-21 | 中国石油天然气股份有限公司大港油田分公司 | Calculation method and storage medium for geological reserve of continental facies matrix type shale oil |
| CN112131522A (en) * | 2020-09-07 | 2020-12-25 | 中海石油(中国)有限公司 | Method for predicting hydrocarbon column height of middle-deep oil and gas reservoir |
| CN112431588A (en) * | 2020-10-15 | 2021-03-02 | 中国石油天然气股份有限公司 | Side drilling well selection optimization method |
| CN112746839A (en) * | 2019-10-31 | 2021-05-04 | 中国石油天然气股份有限公司 | Method and device for determining volume coefficient of crude oil |
| CN112801461A (en) * | 2021-01-06 | 2021-05-14 | 中国石油天然气股份有限公司 | Method and device for determining exploration planning index of petroleum block |
| CN113434896A (en) * | 2021-08-27 | 2021-09-24 | 豪符密码检测技术(成都)有限责任公司 | Method for encrypting, protecting and using data in mineral resource and geographic space fields |
| CN115099991A (en) * | 2022-07-20 | 2022-09-23 | 中国科学院大学 | Heterogeneous oil reservoir dynamic oil saturation calculation method based on production data |
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| CN110578509A (en) * | 2019-07-27 | 2019-12-17 | 大庆油田有限责任公司 | Encryption adjusting method suitable for horizontal well region of low-permeability oil field |
| CN110609328A (en) * | 2019-09-11 | 2019-12-24 | 大庆油田有限责任公司 | Oil saturation prediction method based on well-seismic combination |
| CN110609328B (en) * | 2019-09-11 | 2022-03-22 | 大庆油田有限责任公司 | Oil saturation prediction method based on well-seismic combination |
| CN110821484A (en) * | 2019-10-30 | 2020-02-21 | 中国石油天然气股份有限公司大港油田分公司 | Calculation method and storage medium for geological reserve of continental facies matrix type shale oil |
| CN112746839A (en) * | 2019-10-31 | 2021-05-04 | 中国石油天然气股份有限公司 | Method and device for determining volume coefficient of crude oil |
| CN112746839B (en) * | 2019-10-31 | 2023-07-25 | 中国石油天然气股份有限公司 | Method and device for determining volume coefficient of crude oil |
| CN112131522A (en) * | 2020-09-07 | 2020-12-25 | 中海石油(中国)有限公司 | Method for predicting hydrocarbon column height of middle-deep oil and gas reservoir |
| CN112131522B (en) * | 2020-09-07 | 2024-02-13 | 中海石油(中国)有限公司 | Method for predicting height of hydrocarbon column of middle-deep hydrocarbon reservoir |
| CN112431588B (en) * | 2020-10-15 | 2023-07-25 | 中国石油天然气股份有限公司 | Sidetracking well selection optimization method |
| CN112431588A (en) * | 2020-10-15 | 2021-03-02 | 中国石油天然气股份有限公司 | Side drilling well selection optimization method |
| CN112801461A (en) * | 2021-01-06 | 2021-05-14 | 中国石油天然气股份有限公司 | Method and device for determining exploration planning index of petroleum block |
| CN112801461B (en) * | 2021-01-06 | 2024-03-05 | 中国石油天然气股份有限公司 | Method and device for determining exploration planning index of petroleum block |
| CN113434896B (en) * | 2021-08-27 | 2021-11-02 | 豪符密码检测技术(成都)有限责任公司 | Method for encrypting, protecting and using data in mineral resource and geographic space fields |
| CN113434896A (en) * | 2021-08-27 | 2021-09-24 | 豪符密码检测技术(成都)有限责任公司 | Method for encrypting, protecting and using data in mineral resource and geographic space fields |
| CN115099991A (en) * | 2022-07-20 | 2022-09-23 | 中国科学院大学 | Heterogeneous oil reservoir dynamic oil saturation calculation method based on production data |
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Application publication date: 20181023 |