CN105551083B - A kind of method for portraying horizontal well track and Relation To Strata - Google Patents
A kind of method for portraying horizontal well track and Relation To Strata Download PDFInfo
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- CN105551083B CN105551083B CN201510901124.1A CN201510901124A CN105551083B CN 105551083 B CN105551083 B CN 105551083B CN 201510901124 A CN201510901124 A CN 201510901124A CN 105551083 B CN105551083 B CN 105551083B
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Abstract
The invention discloses a kind of method for portraying horizontal well track and Relation To Strata, including：1) positional information of the horizontal well on hydrocarbon reservoir structure is obtained, obtains the geological data volume of horizontal well region；2) a log standardization is carried out with a well is led to the straight well of horizontal well region；3) Strata Comparison is carried out, determines that Horizontal Well Drilling meets the bottom and top beds of target zone, then establishes target zone top bottom tectonic model；4) horizontal well is chosen adjacent to straight well, is carried out the fine correlation of sand bodies of more wells and is formed sand body panel map；5) three-dimensional sandbody model is established；6) gather in three-dimensional sandbody model and cut into slices along the sand body of horizontal well track, obtain the initial model of horizontal well track and Relation To Strata；7) the sand body section around horizontal well track is modified, realizes the visual representation and meticulous depiction of horizontal well track and Relation To Strata.The present invention can realize the meticulous depiction of horizontal well track and Relation To Strata.
Description
Technical field
The invention belongs to High angle/horizontal wellbore logging assessment technique field, be related to one kind portray horizontal well track with
The method of Relation To Strata.
Background technology
With the gradual perfection of horizontal well development technology, horizontal well quantity is significantly increased, in large-scale development horizontal well
Meanwhile new demand it is also proposed to well logging, need the horizontal wellbore logging study on evaluation way of development system badly.Horizontal wellbore logging is commented
Valency top priority seeks to understand the geometrical relationship between well track and stratum, determines whether well track bores and encounters mesh
Layer, at what position of target zone, with the distance of target zone upper and lower interface etc..
Mainly there are two dimensional cross-section sciagraphy and three-dimensional currently for the means of interpretation of horizontal well track and Relation To Strata
Geologic modeling method.Two dimensional cross-section sciagraphy is enterprising using the main orientation of horizontal well track is projected to adjacent to straight well log
The fine detail correlation of reservoir bed of row, a series of key sequence boundary points are picked up on stratum to draw the relation of well track and stratum.This method
Solves the problems, such as the correlation on horizontal well track and stratum to a certain extent, but there is also the limitation of itself：1)
When well track passes through bed boundary with low angle, the bed boundary that horizontal wellbore logging curve is reflected is not a point,
But retardation is one " section ", it is difficult to it is determined that accurate interface point；2) neighbouring straight well well-log information projects to Horizontal Well rail
During the main orientation of mark, if there is certain inclination angle and gradual change even phase transformation, the curve after projection just to lose the construction of its representative on stratum
Feature.Three-dimensional geological modeling method be using horizontal well adjacent to straight well be based on geology etc. when principle using mathematical algorithm carry out extrapolation with
Interpolation establishes three-dimensional properties model, it is determined that along the attribute information on horizontal well path.It is relatively flat that this method is applied to geological structure
It is slow, the stable stratum of sand-body distribution, degraded if existing in stratum and having in the sand body or muddy intercalation, stratum top/bottom part of lenticular body shape
Deng the geological problem of complexity, just it is difficult to the truth on accurate description stratum, does not reach meticulous depiction well track and stratum
Relation.
The content of the invention
The shortcomings that it is an object of the invention to overcome above-mentioned prior art, there is provided one kind portray horizontal well track with
The method of Relation To Strata, this method can realize the meticulous depiction of horizontal well track and Relation To Strata.
To reach above-mentioned purpose, the method for the present invention for portraying horizontal well track and Relation To Strata is including following
Step：
1) positional information of the horizontal well to be portrayed on hydrocarbon reservoir structure is obtained, according to horizontal well to be portrayed in oil-gas reservoir structure
The positional information made obtains the geological data volume of horizontal well region；
2) a horizontal wellbore logging log normalization is carried out with a well is led to the straight well of horizontal well region；
3) Strata Comparison is carried out in the geological data volume of horizontal well region, determines that Horizontal Well Drilling meets the top of target zone
Bottom boundary, the bottom and top beds that target zone is then met according to Horizontal Well Drilling establish target zone top bottom tectonic model；
4) the target zone Strata Comparison result obtained according to step 3), horizontal well is chosen adjacent to straight well, then to horizontal well
Neighbouring straight well carries out more well correlation of sand bodies and forms sand body panel map；
5) constraint interlayer sand body tendency establishes three-dimensional sandbody model in the sand body panel map formed according to step 4)；
6) acquisition step 5) in establish three-dimensional sandbody model in along horizontal well track sand body cut into slices, obtain level
The initial model of well bore track and Relation To Strata；
7) horizontal well track and the initial model of Relation To Strata established according to horizontal wellbore logging curve and step 6),
The sand body section around horizontal well track is modified using man-machine interaction mode, realizes horizontal well track and ground
The visual representation and meticulous depiction of layer relation.
A well progress log standardization to the straight well of horizontal well region and is led using frequency histogram method.
In step 3) according to based on reference lamina, etc. the variation tendency of log combined supplemented by elevation contrast division carry out
Strata Comparison.
Golden mathematical method in the bottom and top beds use gram of target zone is met according to Horizontal Well Drilling and establishes target zone top bottom construction mould
Type.
More well correlation of sand bodies are carried out using deposition principle during geology etc. adjacent to straight well to horizontal well and form sand body panel map.
Constraint interlayer sand body tendency is built using nearest neighbor algorithm in the sand body panel map formed in step 5) according to step 4)
Found three-dimensional sandbody model.
Acquisition step 5 in step 6)) in establish three-dimensional sandbody model in along horizontal well track sand body cut into slices
Concrete operations are：Hole angle, azimuth and the well depth of horizontal well are obtained according to the well-log information of horizontal well, using minimum curvature half
Shot draws horizontal well track, is then used horizontal well track at equal intervals, obtains space finite points, then by described in
Space finite points are projected on horizontal plane, obtain projection point range, then form vertical columns according to projection point range and space finite points, finally
Vertical columns are found intersection with the three-dimensional sandbody model established in step 5), obtain the sand body section along horizontal well track.
The invention has the advantages that：
The method of meticulous depiction horizontal well track and Relation To Strata of the present invention during portraying, based on
The Strata Comparison carried out in the geological data volume of horizontal well region establishes three-dimensional sandbody model, further according to three-dimensional sandbody model
The initial model of horizontal well track and Relation To Strata is established in the middle sand body section along horizontal well track, then to described
Initial model is modified, so as to efficiently solve sand body or the shale folder existed in the stratum of Horizontal Well Drilling chance in lenticular body shape
Layer, stratum top/bottom part, which have, the complicated geological problem such as degrades, and realizes the meticulous depiction of horizontal well track and Relation To Strata, tool
There is preferable application effect.
Brief description of the drawings
Fig. 1 is the sand body panel map in embodiments of the invention one；
Fig. 2 is the schematic diagram of three-dimensional sandbody model in embodiments of the invention one；
Fig. 3 is that sand body of the extraction along horizontal well track is cut into slices in three-dimensional sandbody model in embodiments of the invention one
Figure；
Fig. 4 is the schematic diagram for the horizontal well track and Relation To Strata portrayed in embodiments of the invention one；
Fig. 5 is the flow chart of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
The method of meticulous depiction horizontal well track and Relation To Strata of the present invention comprises the following steps：
1) positional information of the horizontal well to be portrayed on hydrocarbon reservoir structure is obtained, according to horizontal well to be portrayed in oil-gas reservoir structure
The positional information made obtains the geological data volume of horizontal well region；
2) a log standardization is carried out with a well is led to the straight well of horizontal well region；
3) Strata Comparison is carried out in the geological data volume of horizontal well region, determines that Horizontal Well Drilling meets the top of target zone
Bottom boundary, the bottom and top beds that target zone is then met according to Horizontal Well Drilling establish target zone top bottom tectonic model；
4) the target zone Strata Comparison result obtained according to step 3), horizontal well is chosen adjacent to straight well, then to horizontal well
Neighbouring straight well carries out more well correlation of sand bodies and forms sand body panel map；
5) constraint interlayer sand body tendency establishes three-dimensional sandbody model in the sand body panel map formed according to step 4)；
6) acquisition step 5) in establish three-dimensional sandbody model in along horizontal well track sand body cut into slices, obtain level
The initial model of well bore track and Relation To Strata；
7) horizontal well track and the initial model of Relation To Strata established according to horizontal wellbore logging curve and step 6),
The sand body section around horizontal well track is modified using man-machine interaction mode, realizes horizontal well track and ground
The visual representation and meticulous depiction of layer relation.
A well progress log standardization to the straight well of horizontal well region and is led using frequency histogram method.
In step 3) according to based on reference lamina, etc. the variation tendency of log combined supplemented by elevation contrast division carry out
Strata Comparison.
Golden mathematical method in the bottom and top beds use gram of target zone is met according to Horizontal Well Drilling and establishes target zone top bottom construction mould
Type.
More well correlation of sand bodies are carried out using deposition principle during geology etc. adjacent to straight well to horizontal well and form sand body panel map.
Constraint interlayer sand body tendency is built using nearest neighbor algorithm in the sand body panel map formed in step 5) according to step 4)
Found three-dimensional sandbody model.
Acquisition step 5 in step 6)) in establish three-dimensional sandbody model in along horizontal well track sand body cut into slices
Concrete operations are：Hole angle, azimuth and the well depth of horizontal well are obtained using minimum curvature half according to the well-log information of horizontal well
Shot draws horizontal well track, is then used horizontal well track at equal intervals, obtains space finite points, then by described in
Space finite points are projected on horizontal plane, obtain projection point range, then form vertical columns according to projection point range and space finite points, finally
Vertical columns are found intersection with the three-dimensional sandbody model established in step 5), obtain the sand body section along horizontal well track.
Embodiment one
Before the well track and Relation To Strata of meticulous depiction C_H horizontal wells, it is first determined C_H horizontal wells are in oil-gas reservoir
Position on construction, well logging, geology, drilling well and the mud logging technique of analyzed area straight well, it is familiar with the ground of C_H horizontal wells region
Matter data volume, and carry out the standardization of log, establish the top bottom tectonic model that C_H Horizontal Well Drillings meet target zone.
On the basis of Strata Comparison, three mouthfuls of A wells, B wells and C wells fine correlation of sand bodies of wells development are chosen, wherein, C wells are
Horizontal well C_H's leads a well, and horizontal well C_H well tracks are crept into along A wells direction, establish sand body panel map, as shown in Figure 1；
It was found from sand body panel map, the target zone that Horizontal Well Drilling is met is in C wells (3594.87~3605.13m of depth measurement) and A well (depth measurements
3599.5~3603.87m) on have no muddy intercalation, and B wells are in depth measurement 3596.8~3597.2m and 3598.5~3599.2m well
Muddy intercalation be present in section.
Threedimensional model interlayer sand body tendency is constrained using mode of the sand body panel map based on more section Complete Binds, using most
Nearest neighbor algorithm establishes three-dimensional sandbody model, as shown in Fig. 2 hole angle, azimuth and the well depth of horizontal wellbore logging measurement are recycled,
Then horizontal well track is drawn using minimum curvature radius method, and extracted in three-dimensional sandbody model along C_H horizontal well wells
The sand body section of track, the initial model of C_H horizontal well tracks and Relation To Strata is established, wherein, the initial model is such as
Shown in Fig. 3, from the figure 3, it may be seen that after C_H horizontal wells enter target zone, it can be bored in target zone and run into two shale bands, due to A
Well and C wells meet interval of interest without muddy intercalation in Horizontal Well Drilling, if portraying C_H water using the single sand body section of A wells and C wells
Horizontal well well track and Relation To Strata, then two shale bands in target zone can not be portrayed, and B wells meet purpose in Horizontal Well Drilling
There are two muddy intercalations in interval, after adding B wells progress correlation of sand bodies, three-dimensional sand body mould is established after being constrained using more sections
Type, sand body section of the extraction along well track is with regard to that can depict two in Horizontal Well Drilling chance target zone in three-dimensional sandbody model
Shale band.
Due to extracted along C_H horizontal well tracks in three-dimensional sandbody model sand body section for horizontal well adjacent to straight well
Inter-wells predicting, on the basis of Fig. 3, with reference to horizontal wellbore logging curve by the way of the man-machine interaction to well track near
Sand body section carries out local correction, for example, thickness of interlayer adjustment, interlayer position fine setting and pinching length adjustment, finally realize water
The visual representation and meticulous depiction of horizontal well well track and Relation To Strata, as shown in Figure 4.Place through 26 mouthfuls of real well data
Manage, horizontal well track and Relation To Strata after meticulous depiction, have good uniformity with geologic understanding, demonstrate this
The validity of invention.
The present invention is applicable not only to the stratum that geological structure is relatively gentle, and sand-body distribution is stablized, and is also applied for depositing in stratum
Have in the sand body in lenticular body shape or muddy intercalation, stratum top/bottom part and the complicated geological problem such as degrade, there is extensive promote
Application value.
Above embodiment is merely illustrative of the technical solution of the present invention and unrestricted, although with reference to example to this hair
It is bright to be described in detail, it will be understood by those within the art that, technical scheme can be modified
Or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, it all should cover the claim in the present invention
Among scope.
Claims (7)
1. a kind of method of meticulous depiction horizontal well track and Relation To Strata, it is characterised in that comprise the following steps：
1) positional information of the horizontal well to be portrayed on hydrocarbon reservoir structure is obtained, according to horizontal well to be portrayed on hydrocarbon reservoir structure
Positional information obtain the geological data volume of horizontal well region；
2) a log standardization is carried out with a well is led to the straight well of horizontal well region；
3) Strata Comparison is carried out in the geological data volume of horizontal well region, determines that Horizontal Well Drilling meets Ding Di circle of target zone
Limit, the bottom and top beds that target zone is then met according to Horizontal Well Drilling establish target zone top bottom tectonic model；
4) the target zone Strata Comparison result obtained according to step 3), horizontal well is chosen adjacent to straight well, it is then neighbouring to horizontal well
Straight well carries out more well correlation of sand bodies and forms sand body panel map；
5) constraint interlayer sand body tendency establishes three-dimensional sandbody model in the sand body panel map formed according to step 4)；
6) acquisition step 5) in establish three-dimensional sandbody model in along horizontal well track sand body cut into slices, obtain Horizontal Well
Eye track and the initial model of Relation To Strata；
7) horizontal well track and the initial model of Relation To Strata established according to horizontal wellbore logging curve and step 6), then adopt
The sand body section around horizontal well track is modified with man-machine interaction mode, realizes horizontal well track and stratum
The visual representation and meticulous depiction of relation.
2. the method for meticulous depiction horizontal well track according to claim 1 and Relation To Strata, it is characterised in that adopt
To the straight well of horizontal well region and led a well with frequency histogram method and carry out log standardization.
3. the method for meticulous depiction horizontal well track according to claim 1 and Relation To Strata, it is characterised in that step
It is rapid 3) according to based on reference lamina, etc. elevation contrast division supplemented by combine log variation tendency carry out Strata Comparison.
4. the method for meticulous depiction horizontal well track according to claim 1 and Relation To Strata, it is characterised in that root
Golden mathematical method in the bottom and top beds use gram of target zone is met according to Horizontal Well Drilling and establishes target zone top bottom tectonic model.
5. the method for meticulous depiction horizontal well track according to claim 1 and Relation To Strata, it is characterised in that right
Horizontal well carries out more well correlation of sand bodies using deposition principle during geology etc. adjacent to straight well and forms sand body panel map.
6. the method for meticulous depiction horizontal well track according to claim 1 and Relation To Strata, it is characterised in that step
It is rapid 5) according to step 4) formed sand body panel map in constraint interlayer sand body tendency three-dimensional sand body is established using nearest neighbor algorithm
Model.
7. the method for meticulous depiction horizontal well track according to claim 1 and Relation To Strata, it is characterised in that step
It is rapid 6) in acquisition step 5) in establish three-dimensional sandbody model in along horizontal well track sand body cut into slices concrete operations be：
Hole angle, azimuth and the well depth that horizontal well is obtained according to the well-log information of horizontal well are horizontal using minimum curvature radius method drafting
Well bore track, horizontal well track is then subjected to equal interval sampling, obtains space finite points, then the space finite points are projected
Onto horizontal plane, obtain projection point range, then form vertical columns according to projection point range and space finite points, finally by vertical columns with
The three-dimensional sandbody model established in step 5) is found intersection, and obtains the sand body section along horizontal well track.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106154322B (en) * | 2016-08-02 | 2018-08-14 | 中国石油天然气集团公司 | Log curve correction method and apparatus |
| CN106869915B (en) * | 2017-03-14 | 2020-05-08 | 中国石油天然气股份有限公司 | Horizontal well interval interlayer prediction method and device |
| CN106990448B (en) * | 2017-04-05 | 2018-11-16 | 中国石油天然气股份有限公司 | A kind of marine clastics horizontal well is every interlayer log interpretation method and device |
| CN108961352B (en) * | 2017-05-19 | 2021-07-20 | 中国石油化工股份有限公司 | Method for drawing logging while drilling curve |
| CN111090918B (en) * | 2018-10-24 | 2023-01-24 | 中国石油化工股份有限公司 | Design method and system for horizontal well borehole trajectory |
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