CN101625420B - Reservoir description method - Google Patents
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- CN101625420B CN101625420B CN2009101600806A CN200910160080A CN101625420B CN 101625420 B CN101625420 B CN 101625420B CN 2009101600806 A CN2009101600806 A CN 2009101600806A CN 200910160080 A CN200910160080 A CN 200910160080A CN 101625420 B CN101625420 B CN 101625420B
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Abstract
The invention discloses a reservoir description method comprising the following steps: obtaining well earthquake data; processing the well earthquake data in a coarse frequency-reduction mode to obtain coarse well earthquake data; obtaining a large-level geological structure explaining result according to the coarse well earthquake data; obtaining a fine geological structure explaining result according to the well earthquake data based on the large-level geological structure explaining result; simulating the fine geological structure explaining result as exposure data; establishing a reservoir description model by using constraint conditions including a constraint condition obtained according to the exposure data. The reservoir description model established by the reservoir description method is more accurate, can replace a real geological structure, reflect real a reservoir storage layer and greatly increase oil extraction rate.
Description
Technical field
The present invention relates to the reservoir description field, relate in particular to a kind of method of the reservoir description based on well earthquake data.
Background technology
The prototype model is to set up the reservoir description model based, if the error of prototype model is big or mistake occurs, just can not set up accurate reservoir description model, can not the exploitation of accurate instruction oil reservoir.
The prototype model of setting up the reservoir description model at present mainly contains two approach: the one, and appear data and the made ground theory appeared and obtain in the field; The 2nd, the data that vertical dissection of dense well pattern is obtained.But nonmarine deposit is often very complicated, and the appear data of appearing that obtain of field can not embody accurately with made ground that the oil reservoir actual deposition changes and the statistical nature of reservoir, and the data that will obtain effectively to appear are also difficult usually.Dense well pattern is dissected the data that obtain then can't reflect lateral prediction and contrast between well and the well.
Because the limited data data that dissection obtains with dense well pattern of appearing have typical sample properties; And sample size is less; Therefore; Rely on the reservoir description model of the data foundation that open-air appear appear data and the dense well pattern anatomical documentation that obtain obtain often to have uncertainty, confidence level is not enough.Particularly can not accurately reflect the lateral direction penetrating relation of oil reservoir, make tar productivity not high.
Summary of the invention
In view of the problems referred to above of prior art, the purpose of this invention is to provide a kind of method and device that more accurately reflects the reservoir description of reservoir deposition and connected relation.
To achieve these goals, the invention provides a kind of method of reservoir description, comprising:
Obtain well earthquake data;
Well earthquake data is carried out the alligatoring down conversion process obtain the alligatoring well earthquake data;
Obtain large level geologic structure interpretation result according to said alligatoring well earthquake data;
On said large level geologic structure interpretation result's basis, obtain fine geology structure elucidation result according to said well earthquake data;
Said fine geology structure elucidation result is modeled as the data of appearing;
Use comprises that the constraint condition of the constraint condition that the data of appearing according to said simulation obtain sets up the reservoir description model.
Beneficial effect of the present invention is; Well earthquake data with a high credibility is modeled as the data of appearing replaces the limited data of appearing with sample properties as a constraint condition setting up the reservoir description model; The reservoir description model of setting up is more accurate; More can represent real tectonic structure, reflect real oil reservoir, can improve tar productivity greatly.
Description of drawings
Fig. 1 is the process flow diagram of embodiment one of the method for reservoir description of the present invention;
Fig. 2 is the elementary oil reservoir synoptic diagram that draws according to the data of appearing in the prior art;
Fig. 3 is the elementary oil reservoir synoptic diagram that draws according to well earthquake data among the embodiment one;
Fig. 4 is the reservoir description illustraton of model that uses the constraint condition foundation that comprises the constraint condition that the data of appearing obtain in the prior art;
Fig. 5 is the reservoir description illustraton of model of setting up according to the method for the embodiment of the invention one;
Fig. 6 is the process flow diagram of embodiment two of the method for reservoir description of the present invention;
Fig. 7 is the process flow diagram of embodiment three of the method for reservoir description of the present invention.
Embodiment
Specify embodiments of the invention below in conjunction with accompanying drawing.
Embodiment one:
The process flow diagram of the embodiment one of the method for reservoir description of the present invention as shown in Figure 1 comprises:
S11 obtains well earthquake data;
Well earthquake data is widely used in the oilfield prospecting developing at present, and it is higher than surface seismic resolution, can reach the resolution of 1 meter spacing.Particularly under the not high situation of the lateral resolution of existing log data, dense well pattern data, the data of appearing, the well earthquake data lateral resolution is high.Because it is directly between the well of reality and well, to carry out seismic event to send and receive and obtain, close at the lateral direction penetrating of reflection geologic reservoir that to fasten credibility higher.
S12 carries out the alligatoring down conversion process to well earthquake data and obtains the alligatoring well earthquake data;
High frequency characteristics and high resolving power characteristics according to well earthquake data; Though can reflect trickle tectonic structure; But can not directly reflect some zonal tectonic structures, need carry out the large level geologic structure interpretation, understand fully the zonal large level tectonic structure on the macroeconomic significance well earthquake data; So well earthquake data is carried out firstization down conversion process, to be fit to the needs of large level geologic structure interpretation.
S13 obtains large level geologic structure interpretation result according to said alligatoring well earthquake data;
S14 obtains fine geology structure elucidation result according to said well earthquake data on said large level geologic structure interpretation result's basis;
Under the situation that the tectonic structure of zonal large level is confirmed, the fine geology structure elucidation result who carries out just has very high confidence level.
S15 is modeled as the data of appearing with said fine geology structure elucidation result;
The data that obtain according to the data of appearing with sample properties are as the prototype model; As a constraint condition setting up the reservoir description model; Because the deficiency of sample size, the confidence level of prototype model itself is not high, and the uncertainty of the reservoir description model of foundation is very big.This is very complicated because of geologic structure; Particularly fasten in the lateral direction penetrating pass of reservoir; The data of appearing can only be inferred according to existing theory and connect; And actual result is isolated really free, and this just makes that the tar productivity of primary oil recovery is low, and a large amount of free oil reservoirs is not opened just.
The elementary oil reservoir synoptic diagram that draws according to the data of appearing in the prior art as shown in Figure 2 shows among the figure that oil reservoir A is 100% lateral direction penetrating.
The same area, the elementary oil reservoir synoptic diagram that draws according to well earthquake data as shown in Figure 3, the oil reservoir A that shows among the figure is 50% lateral direction penetrating.Contrast can know that their difference is fairly obvious with Fig. 2.
Because the geologic reservoir of well earthquake data reflection concerns that confidence level is higher; More accurate; Therefore said fine geology structure elucidation result is modeled as the data of appearing and goes to substitute the effect of data in setting up the reservoir description model of appearing, making that the reservoir description model of setting up is more accurate.
S16 uses the constraint condition of the constraint condition comprise that the data of appearing according to said simulation obtain to set up the reservoir description model.
Setting up one often needs a lot of constraints more near the reservoir description model of true geologic structure, and whether whether these constraints itself accurately will directly influence the reservoir model of foundation accurate.The constraint condition that obtains according to the data of appearing is usually as one of them constraint condition; Can know from top analysis, use the fine geology explanation results of well earthquake data to substitute the data of appearing, as the data of appearing of simulation; Appear that constraint condition of data of feasible dependence is more accurate; The reservoir description model of setting up is more accurate naturally, more near real tectonic structure, and the more real oil reservoir of reflection.
Use the reservoir description illustraton of model of the constraint condition foundation that comprises the constraint condition that the data of appearing obtain and the reservoir description illustraton of model that the method according to present embodiment shown in Figure 5 is set up in the prior art as shown in Figure 4; Relatively can know; Exist some evident difference between two figure, such as identical in theory reservoir B, what on lateral direction penetrating, reflect is completely different; Be 100% lateral direction penetrating among Fig. 4, have tomography among Fig. 5.Through the log data checking, reservoir description illustraton of model shown in Figure 5 is then more accurate, more near actual value.
The beneficial effect of present embodiment is; The fine geology structure elucidation result who obtains according to well earthquake data with a high credibility is modeled as the data of appearing replaces the limited data of appearing with sample properties to set up the reservoir description model; Can make that the reservoir description model of setting up is more accurate; More real tectonic structure can be represented, tar productivity can be improved greatly.
Embodiment two:
As shown in Figure 6, the difference of present embodiment and embodiment one only is, well earthquake data carried out the alligatoring down conversion process obtain the alligatoring well earthquake data and further comprise:
S121, the longitudinal frame that reduces well earthquake data with the bandpass filtering method obtains vertical alligatoring well earthquake data; At first convert well earthquake data to time domain by Depth Domain; Utilize conventional earthquake frequency ranges of data scope and dominant frequency information to carry out bandpass filtering; In the real work; The general octave that adopts is calculated the bandpass filtering frequency band range, is 25Hz if the frequency band range of geological data is 8～70Hz, dominant frequency, then frequency band range 8～50Hz, the dominant frequency 25Hz of bandpass filtering.Like this, the high frequency composition that is higher than 70Hz is just filtered.
S122 obtains the alligatoring well earthquake data with taking out the lateral resolution that matching method reduces said vertical alligatoring well earthquake data.What is called is taken out matching method, and is relative with interpolation method, is exactly to extract some values wherein according to certain rule, casts out some values, forms new alligatoring well earthquake data by the value that keeps then.
Like this, the resolution of well earthquake data on the vertical and horizontal direction that has high frequency characteristics and high-resolution characteristics has all reduced.Just can carry out the large level geologic structure interpretation according to the alligatoring well earthquake data after the alligatoring frequency reducing.
Certainly, the longitudinal frame and the lateral resolution of the reduction well earthquake data in the present embodiment can also adopt other method, as long as reach the purpose that reduces resolution, conveniently carry out the large level geologic structure interpretation and get final product.
The beneficial effect of present embodiment is; On the basis of embodiment one; Method through simple possible has reduced the resolution of well earthquake data on the vertical and horizontal direction, on the firstization well earthquake data basis after the alligatoring down conversion process, can carry out the large level geologic structure interpretation.
Embodiment three:
On the basis of embodiment one and embodiment two, as shown in Figure 7, S16 further comprises in the present embodiment:
S161 is according to the said plan data computation variation function of appearing; When the variation function is set up the reservoir description model as a constraint condition; The quality of variation function and precision often directly influence the degree of accuracy of reservoir description model; Usually remove to calculate the variation function according to the data of appearing, with analyze among the embodiment one the same, the fine geology explanation results alternate data of use well earthquake data is appeared; The data of appearing as simulation remove to calculate the variation function, and the variation function is more accurate naturally.
S162 uses to comprise that the constraint condition of said variation function sets up the reservoir description model.
The beneficial effect of this enforcement is; When setting up reservoir model according to the constraint condition that comprises the variation function; It is more accurate that the fine geology structure elucidation result who obtains according to well earthquake data with a high credibility is modeled as the variation function that the data computation of appearing obtains; And then the reservoir description model of setting up is more accurate, more can reflect real oil reservoir, improves tar productivity.
Above embodiment is merely exemplary embodiment of the present invention, is not used in restriction the present invention, and protection scope of the present invention is limited additional claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection domain, this modification or be equal to replacement and also should be regarded as dropping in protection scope of the present invention.
Claims (1)
1. the method for a reservoir description is characterized in that, this method specifically comprises:
Obtain well earthquake data;
Said well earthquake data is carried out the alligatoring down conversion process obtain the alligatoring well earthquake data;
Obtain large level geologic structure interpretation result according to said alligatoring well earthquake data;
On said large level geologic structure interpretation result's basis, obtain fine geology structure elucidation result according to said well earthquake data;
Said fine geology structure elucidation result is modeled as the data of appearing;
Use comprises that the constraint condition of the constraint condition that obtains according to the said data of appearing sets up the reservoir description model;
Wherein, saidly well earthquake data is carried out the alligatoring down conversion process obtain the alligatoring well earthquake data and further comprise:
The longitudinal frame that reduces said well earthquake data with the bandpass filtering method obtains vertical alligatoring well earthquake data;
Obtain the alligatoring well earthquake data with taking out the lateral resolution that matching method reduces said vertical alligatoring well earthquake data;
And wherein, said use comprises that the constraint condition of the constraint condition that obtains according to the said data of appearing sets up the reservoir description model and further comprise:
According to the said data computation variation function of appearing;
Use comprises that the constraint condition of said variation function sets up the reservoir description model.
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| CN101625420B true CN101625420B (en) | 2012-05-09 |
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| RU2013110283A (en) * | 2010-08-09 | 2014-09-20 | Конокофиллипс Компани | METHOD OF RE-SCALING WITH ENLARGING CELLS OF A RESERVED CONDUCTIVITY COLLECTOR |
| CN102914793B (en) * | 2012-10-12 | 2016-03-09 | 中国石油天然气股份有限公司 | A kind of non-equivalent volume modeling method of heterogeneous reservoir and device |
| CN105334534A (en) * | 2015-10-21 | 2016-02-17 | 中国石油大学(华东) | Low order fault interpretation method based on construction mode guidance |
Citations (4)
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|---|---|---|---|---|
| CN1046983A (en) * | 1990-06-09 | 1990-11-14 | 潘仁芳 | A kind of method of describing oil reservoir with seismic data |
| CN1797037A (en) * | 2004-12-29 | 2006-07-05 | 中国石油天然气集团公司 | Method for carrying out inversion for wave impedance of earthquake wave |
| CN101086535A (en) * | 2006-06-06 | 2007-12-12 | 托塔尔公司 | A process and program for characterising evolution of an oil reservoir over time |
| US7373251B2 (en) * | 2004-12-22 | 2008-05-13 | Marathon Oil Company | Method for predicting quantitative values of a rock or fluid property in a reservoir using seismic data |
-
2009
- 2009-07-22 CN CN2009101600806A patent/CN101625420B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046983A (en) * | 1990-06-09 | 1990-11-14 | 潘仁芳 | A kind of method of describing oil reservoir with seismic data |
| US7373251B2 (en) * | 2004-12-22 | 2008-05-13 | Marathon Oil Company | Method for predicting quantitative values of a rock or fluid property in a reservoir using seismic data |
| CN1797037A (en) * | 2004-12-29 | 2006-07-05 | 中国石油天然气集团公司 | Method for carrying out inversion for wave impedance of earthquake wave |
| CN101086535A (en) * | 2006-06-06 | 2007-12-12 | 托塔尔公司 | A process and program for characterising evolution of an oil reservoir over time |
Non-Patent Citations (1)
| Title |
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| 冉建斌等.基于三维地震资料的油藏描述技术和方法.《石油地球物理勘探》.2004,第39卷(第1期),102-112. * |
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Inventor after: Yang Hongwei Inventor after: Wu Wei Inventor after: Lv Deling Inventor after: Hu Xinhong Inventor after: Gao Shoutao Inventor after: Qian Zhi Inventor after: Lin Songhui Inventor after: Xia Jian Inventor after: Cui Xiangying Inventor after: Zhang Yuxiao Inventor before: Yang Hongwei Inventor before: Lv Deling Inventor before: Hu Xinhong Inventor before: Gao Shoutao Inventor before: Qian Zhi |
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Free format text: CORRECT: INVENTOR; FROM: YANG HONGWEI LV DELING HU XINHONG GAO SHOUTAO QIAN ZHI TO: YANG HONGWEI LVDELING HU XINHONG GAO SHOUTAO QIAN ZHI LIN SONGHUI XIA JIAN CUI XIANGYING ZHANG YUXIAO WU WEI |