CN107544093A - The structure interpretation layer depth system compensation method of borehole restraint - Google Patents
The structure interpretation layer depth system compensation method of borehole restraint Download PDFInfo
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Abstract
The present invention provides a kind of structure interpretation layer depth system compensation method of borehole restraint, and the structure interpretation layer depth system compensation method of the borehole restraint includes：Step 1, according to the well-log information of drilling well, seismic horizon explanation is carried out；Step 2, fault interpretation is carried out, completes to carry out fault combination in the plane after explaining on seismic profile；Step 3, preliminary tectonic ore-forming is carried out to the layer position explained；Step 4, after preliminary tectonic ore-forming, error correction is carried out using drilling well actual grade, so as to obtain relatively accurate structural map.The structure interpretation layer depth system compensation method of the borehole restraint effectively solves structural map and mismatched with real drilling depth, the problem of construction feature and big actual variance, significant especially for high degree of prospecting area, the present invention is simple and practical, it is workable, there is preferable promotion prospect.
Description
Technical field
The present invention relates to petroleum geology exploration field, a kind of structure interpretation layer depth system of borehole restraint is especially related to
Bearing calibration.
Background technology
In geophysical exploration, underground medium speed is a very crucial factor.Accurate speed is asked for, and is always
The key problem of seismic prospecting.Accurate speed is only obtained, just can determine that depth, the inclination angle on the stratum for producing reflection or refraction
With the position on stratum.It is the most frequently used to determine that speed method is superposition (skew) speed in processes, underground is asked for by Dix formula
Speed.It is built upon in the upper unconverted hypothesis of velocity field transverse direction.
As the continuous intensification of exploration and development degree, the difficulty of exploration and development are also increasing.The emphasis of exploration and development is
Switch to find structure with lower amplitude oil-gas reservoir and hidden complex lithology oil-gas reservoir by past searching macrostructure oil-gas reservoir, this is to surveying
Visit development technique and propose higher requirement, higher requirement also is proposed to the precision of tectonic ore-forming.Conventional tectonic ore-forming
Although method can also reflect the structural configuration of subsurface formations, when research area construction complexity, higher formation clination, tomography it is more and
When speed vertically and horizontally changes greatly, tectonic ore-forming is carried out with the drawing methods of routine, frequently can lead to the result of mistake, increase
The risk of exploration.For this we have invented a kind of structure interpretation layer depth system compensation method of new borehole restraint, solve with
Upper technical problem.
The content of the invention
Knot of the structural map with drilling well at well point is made by the correction of drilling depth it is an object of the invention to provide a kind of
Fruit coincide, and keeps the structure interpretation layer depth system compensation method of the borehole restraint of rational tectonic framework in the plane.
The purpose of the present invention can be achieved by the following technical measures：The structure interpretation layer depth system compensation side of borehole restraint
Method, the structure interpretation layer depth system compensation method of the borehole restraint include：Step 1, according to the well-log information of drilling well, carry out ground
Layer position is shaken to explain；Step 2, fault interpretation is carried out, completes to carry out fault combination in the plane after explaining on seismic profile；Step
3, preliminary tectonic ore-forming is carried out to the layer position explained；Step 4, after preliminary tectonic ore-forming, drilling well actual grade is utilized
Error correction is carried out, so as to obtain relatively accurate structural map.
The purpose of the present invention can be also achieved by the following technical measures：
The structure interpretation layer depth system compensation method of the borehole restraint also includes, and before step 1, understands the base in research area
This geologic aspects, and the related data of structural evolution is collected, it is familiar with tectonic movement and the stress direction of research area experience.
In step 1, according to interval transit time, density these log synthetic seismograms demarcation stratum, stratum is carried out
Explain, to check whether interpretation horizon closes during stratigraphic interpretation.
In step 2, in seismic profile explain tomography when it is first noted that tomography upper and lower adjacent layer position inheritance,
Its secondary structural evolution history with reference to research area judges that tomography is normal fault or reversed fault, if meets the construction in the period
Whether stress direction, tomography cutting relation are correct.
In step 3, the interval velocity on stratum is tried to achieve by dix formula algorithms using stack velocity spectrum, and then is tried to achieve average
Speed, recycle stereoscopic graticule to format technology, establish the average velocity field in space, carry out time and depth transfer and form depthwise construction figure.
In step 4, when being corrected to some layer of position or construction face, with the following method：Each mouth well is calculated first
Error between upper earthquake and well layering, the mean error of multiple wells is uniformly subtracted, to ensure that the configuration of construction is constant；So
Error information gridding is finally corrected, the aspect after being corrected to original layers position grid according to Kriging method afterwards
Grid, obtain final structural map.
The structure interpretation layer depth system compensation method of borehole restraint in the present invention, by actual well drilled depth to earthquake solution
A layer structural map is released to be corrected.This method is to grasp research area construction feature, and on the basis of common version flow,
Preliminary structural map is obtained with variable speed mapping method, Error Grid is then established and is modified, so as to obtain more accurate structure
Make figure.The problem of this method effectively solves structural map and mismatched with real drilling depth, and construction feature and actual variance are big, it is special
Not significant for high degree of prospecting area, the present invention is simple and practical, workable, has before preferably promoting
Scape.
Brief description of the drawings
Fig. 1 is the flow of a specific embodiment of the structure interpretation layer depth system compensation method of the borehole restraint of the present invention
Figure；
Fig. 2 is the schematic diagram that seismic horizon explains with fault interpretation in a specific embodiment of the invention；
Fig. 3 is seismic reflection layer structural map in a specific embodiment of the invention；
Fig. 4 is the structural map after well depth correction in a specific embodiment of the invention.
Embodiment
For enable the present invention above and other objects, features and advantages become apparent, it is cited below particularly go out preferable implementation
Example, and coordinate shown in accompanying drawing, it is described in detail below.
As shown in figure 1, Fig. 1 is the flow chart of the structure interpretation layer depth system compensation method of the borehole restraint of the present invention.
First had to before the present invention is implemented detailed to the Basic Geological overview in research area and the progress of region evolutionary process
Solution.It is familiar with tectonic movement and the stress direction of research area experience.Ensure the geology feelings for meeting this area of next step structure interpretation
Condition so that structure interpretation has more reasonability.
Step 101：Seismic reflection layer explains that, according to the well-log information of drilling well, the flow that conventionally layer is explained is entered
Row is explained.
This step is the basis of this invention, and mainly conventionally layer explains flow, utilizes as shown in Figure 2
The interpretation softwares such as landmark, Geoframe carry out structure interpretation, concretely comprise the following steps an AC (interval transit time), DEN (density) etc.
Log imported into seismic interpretation software-synthetic seismogram demarcation stratum-stratigraphic interpretation.Will during stratigraphic interpretation
Check whether interpretation horizon closes.
Step 102：Fault interpretation, complete to carry out fault combination in the plane after explaining on seismic profile.
Means of interpretation in seismic profile as shown in Fig. 2 it is first noted that tomography is in upper and lower adjacent layer position when explaining tomography
Inheritance, its it is secondary with reference to research area structural evolution history judge that tomography is normal fault or reversed fault, if meet this
Whether the tectonic stress direction in period, tomography cutting relation are correct etc..
Step 103：Initial construction is into figure
The layer position explained carries out preliminary tectonic ore-forming (such as Fig. 3) with software.The key of this step is building for velocity field
It is vertical.The interval velocity on stratum is tried to achieve by dix formula algorithms using stack velocity spectrum, and then tries to achieve average speed, is recycled three-dimensional
Gridding technology, the average velocity field in space is established, carry out time and depth transfer and form depthwise construction figure.
Step 104：Well depth about beam alignment, error correction is carried out using drilling well actual grade, it is relatively accurate so as to obtain
Structural map.
When being corrected to some layer of position or construction face, with the following method：Earthquake and well on each mouth well are calculated first
Error between layering, the mean error of multiple wells is uniformly subtracted, to ensure that the configuration of construction is constant.
Then error information gridding is finally corrected to original layers position grid, obtains school according to Kriging method
Aspect grid after just, obtain final structural map (such as Fig. 4).
By the front and rear structural map error contrast of the well depth of table 1 correction as can be seen that the structural map precision after correction is obvious
Improve.
The front and rear structural map error contrast table of the well depth of table 1 correction
| Well-name | It is real to bore layer depth | Error before structural map correction | Error before structural map correction |
| Stake 204 | 2592 | 18 | -2 |
| Stake 306 | 2555 | 35 | 5 |
| Stake 207 | 2600 | 30 | 3 |
| Stake 301 | 2578 | 43 | 6 |
| Stake 302 | 2515 | 35 | -5 |
Claims (6)
1. the structure interpretation layer depth system compensation method of borehole restraint, it is characterised in that the structure interpretation layer depth of the borehole restraint
System compensation method includes：
Step 1, according to the well-log information of drilling well, seismic horizon explanation is carried out；
Step 2, fault interpretation is carried out, completes to carry out fault combination in the plane after explaining on seismic profile；
Step 3, preliminary tectonic ore-forming is carried out to the layer position explained；
Step 4, after preliminary tectonic ore-forming, error correction is carried out using drilling well actual grade, it is relatively accurate so as to obtain
Structural map.
2. the structure interpretation layer depth system compensation method of borehole restraint according to claim 1, it is characterised in that the well is about
The structure interpretation layer depth system compensation method of beam also includes, and before step 1, understands the Basic Geological overview in research area, and
The related data of structural evolution is collected, is familiar with tectonic movement and the stress direction of research area experience.
3. the structure interpretation layer depth system compensation method of borehole restraint according to claim 1, it is characterised in that in step
In 1, according to interval transit time, density these log synthetic seismograms demarcation stratum, stratigraphic interpretation is carried out, in stratigraphic interpretation
During to check whether interpretation horizon closes.
4. the structure interpretation layer depth system compensation method of borehole restraint according to claim 1, it is characterised in that in step
In 2, it is first noted that tomography is in the inheritance of upper and lower adjacent layer position, its secondary reference research during explanation tomography in seismic profile
The structural evolution history in area judges that tomography is normal fault or reversed fault, if meets the tectonic stress direction in the period, tomography
Whether cutting relation is correct.
5. the structure interpretation layer depth system compensation method of borehole restraint according to claim 1, it is characterised in that in step
In 3, the interval velocity on stratum is tried to achieve by dix formula algorithms using stack velocity spectrum, and then tries to achieve average speed, is recycled three-dimensional
Gridding technology, the average velocity field in space is established, carry out time and depth transfer and form depthwise construction figure.
6. the structure interpretation layer depth system compensation method of borehole restraint according to claim 1, it is characterised in that in step
In 4, when being corrected to some layer of position or construction face, with the following method：Earthquake on each mouth well is calculated first to be layered with well
Between error, the mean errors of multiple wells is uniformly subtracted, to ensure that the configuration of construction is constant；Then calculated according to Ke Lijin
Method is finally corrected to original layers position grid, the aspect grid after being corrected, obtained final to error information gridding
Structural map.
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| CN109763814A (en) * | 2019-01-09 | 2019-05-17 | 浙江财经大学 | Stratum matching visual analysis method based on multi-dimensional logging data |
| CN110058306A (en) * | 2019-04-11 | 2019-07-26 | 中国石油天然气股份有限公司 | Determine the method, apparatus and computer storage medium of three-dimensional velocity body |
| CN111308549A (en) * | 2020-03-09 | 2020-06-19 | 中国石油化工股份有限公司 | Variable-speed mapping method based on model inversion |
| CN111999768A (en) * | 2020-08-24 | 2020-11-27 | 中国石油化工股份有限公司 | Construction elevation determination method based on construction model in drilling layered design |
| CN112529981A (en) * | 2020-11-24 | 2021-03-19 | 中国煤炭地质总局地球物理勘探研究院 | Depth domain coal seam floor contour line mapping method |
| CN113064215A (en) * | 2020-01-02 | 2021-07-02 | 中国石油天然气股份有限公司 | Method, device and system for constructing well calibration of map |
| CN114690246A (en) * | 2020-12-30 | 2022-07-01 | 中国石油化工股份有限公司 | Method for identifying multi-stress buried hill fault by three-principle method |
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Cited By (12)
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| CN109763814A (en) * | 2019-01-09 | 2019-05-17 | 浙江财经大学 | Stratum matching visual analysis method based on multi-dimensional logging data |
| CN109763814B (en) * | 2019-01-09 | 2022-05-13 | 浙江财经大学 | Stratum matching visual analysis method based on multi-dimensional logging data |
| CN110058306A (en) * | 2019-04-11 | 2019-07-26 | 中国石油天然气股份有限公司 | Determine the method, apparatus and computer storage medium of three-dimensional velocity body |
| CN110058306B (en) * | 2019-04-11 | 2020-10-09 | 中国石油天然气股份有限公司 | Method, apparatus and computer storage medium for determining three-dimensional velocity volume |
| CN113064215A (en) * | 2020-01-02 | 2021-07-02 | 中国石油天然气股份有限公司 | Method, device and system for constructing well calibration of map |
| CN111308549A (en) * | 2020-03-09 | 2020-06-19 | 中国石油化工股份有限公司 | Variable-speed mapping method based on model inversion |
| CN111308549B (en) * | 2020-03-09 | 2022-01-11 | 中国石油化工股份有限公司 | Variable-speed mapping method based on model inversion |
| CN111999768A (en) * | 2020-08-24 | 2020-11-27 | 中国石油化工股份有限公司 | Construction elevation determination method based on construction model in drilling layered design |
| CN111999768B (en) * | 2020-08-24 | 2022-05-20 | 中国石油化工股份有限公司 | Construction elevation determination method based on construction model in drilling layered design |
| CN112529981A (en) * | 2020-11-24 | 2021-03-19 | 中国煤炭地质总局地球物理勘探研究院 | Depth domain coal seam floor contour line mapping method |
| CN114690246A (en) * | 2020-12-30 | 2022-07-01 | 中国石油化工股份有限公司 | Method for identifying multi-stress buried hill fault by three-principle method |
| CN114690246B (en) * | 2020-12-30 | 2023-07-07 | 中国石油化工股份有限公司 | Method for identifying multi-stress down-the-hill fault by three principle method |
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