CN106285476A - A kind of horizontal drilling Real-time Seismic geological syntheses guidance method - Google Patents
A kind of horizontal drilling Real-time Seismic geological syntheses guidance method Download PDFInfo
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- CN106285476A CN106285476A CN201610764453.0A CN201610764453A CN106285476A CN 106285476 A CN106285476 A CN 106285476A CN 201610764453 A CN201610764453 A CN 201610764453A CN 106285476 A CN106285476 A CN 106285476A
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
Abstract
The invention discloses a kind of horizontal drilling Real-time Seismic geological syntheses guidance method, the method comprises the following steps: 1) in known oil gas field work area, three-dimensional prestack time is turned deep seismic data and explains, obtain and treat the initial guided modes of drilling well；2) each reference lamina in oil gas field work area and purpose oil-gas Layer and the lithology of adjacent formations, electrical and Seismic reflection character are determined；3), before positive drilling well enters target, velocity field is carried out real-time update, obtains positive drilling well modified model guided modes；4) when target will be entered after positive drilling well is bored and met reference lamina, it was predicted that positive drilling well enters the target spot height above sea level degree of depth, and carries out track optimizing before target；5) after positive drilling well enters target, renewal speed field again, to obtain up-to-date guided modes；6) under the guidance of up-to-date guided modes, analyze in conjunction with real boring, carry out horizontal segment guiding.The present invention provides a kind of Seismology and Geology integrated guidance method that can revise guided modes in real time, it is ensured that horizontal well can accurately enter target zone, and efficiently walks in target zone.
Description
Technical field
The present invention relates to natural petroleum gas field technical field, particularly relate to a kind of horizontal drilling Real-time Seismic geological syntheses
Guidance method.
Background technology
Horizontal drilling can be significantly increased the draining gas area of target payzone, improves the production efficiency of oil-gas Layer, is fine and close
The key of the unconventionaloil pool reservoir Efficient Development such as oil reservoir, shale gas reservoir.In the drilling process of horizontal well, guide and play to pass
Important effect, it is to ensure that horizontal well accurately enters target zone, the key that safeguard level section is efficiently walked in oil-gas Layer, directly
Connect the single well productivity affecting horizontal well.
Traditional horizontal drilling guides and generally comprises: before boring, guided modes is set up, entered track optimizing and horizontal segment ground before target
Matter guides.At present, during horizontal drilling guides, guided modes is the most changeless, when guided modes and reality occur
When brill strata condition is not inconsistent, it is difficult to the most effectively Guidance Levels well drilling well.
Summary of the invention
The technical problem to be solved in the present invention is for defect of the prior art, it is provided that a kind of horizontal drilling is in real time
Shake geological syntheses guidance method.
The technical solution adopted for the present invention to solve the technical problems is: a kind of horizontal drilling Real-time Seismic geological syntheses is led
To method, comprise the following steps:
1) in known oil gas field work area, existing three-dimensional prestack time is turned deep seismic data and explains, implement work area geology structure
Make feature and purpose oil-gas Layer structural configuration, be initial guided modes to cross the seismic profile of well bore track to be drilled；
2) lead a well rock core, well logging and well-log information according to the finishing drilling of oil gas field work area, regional stratum is divided, determines region
The lithology of each reference lamina and purpose oil-gas Layer and adjacent formations, electrically and Seismic reflection character；
3), before positive drilling well enters target, collect the new drilled well of acquisition in time and bore the coordinate of reference lamina characteristic point, reinforcing the heart height above sea level and vertical depth in fact
Data, carry out real-time update, and utilize most current speed field that three-dimensional prestack time seismic data is turned depths reason velocity field；
Then, in up-to-date prestack time turns deep seismic data cube, the seismic profile of decimated positive well-drilling borehole track is led as modified model
To model；
Velocity field real time updating method is as follows: collect in time new drilled well real bore the coordinate of reference lamina characteristic point, reinforcing the heart height above sea level and
Vertical depth data, on the premise of old velocity field is as quality control, calculate Error Trend face；In conjunction with obtaining initial guided modes
Velocity field Error Trend face is corrected；Volume is repaiied on the premise of finally the Error Trend face after correction being carried out quality control
Whole district's 3D velocity field；
4) when target will be entered after positive drilling well is bored and met reference lamina, according to the neighbouring vertical thickness of oil-gas Layer led a well or bored offset well, knot
Close reference lamina feature and modified model guided modes, comprehensively analyze and calculate, it was predicted that positive drilling well enters the target spot height above sea level degree of depth, goes forward side by side
Row enters track optimizing before target；
5) after positive drilling well enters target, if the target zone degree of depth in guided modes and the real absolute error piercing the target spot target zone degree of depth
Exceed the 10% of target zone thickness, utilize this to enter the target spot real brill coordinate of reference lamina characteristic point, reinforcing the heart height above sea level and vertical depth number the most in time
Again update according to velocity field, obtain the most up-to-date guided modes；
6) under the guidance of up-to-date guided modes, analyze in conjunction with real boring, carry out horizontal segment guiding.
By such scheme, described step 6) enters the guiding of the horizontal segment after target and can be subdivided into three aspects: drill bit is in target
Location confirmation in Ceng, drilling direction confirms with the relation of stratigraphic dip, and drill bit earth layer in front situation anticipation and well track adjust；
6.1) drill bit location confirmation in destination layer: according to reference lamina feature analysis, survey in conjunction with well logging lithology, gas and bore the time-division
Analysis, launches the research of substratum fine correlation, determines the substratum residing for drill bit and away from the distance at the bottom of this substratum top；Such as guided modes
The target zone degree of depth exceedes the 10% of target zone thickness with real target zone degree of depth absolute error of boring, and need to bore target zone characteristic point according to real
Coordinate, reinforcing the heart height above sea level and vertical depth data carry out velocity field update with guided modes substitute；
6.2) drilling direction confirms with the relation of stratigraphic dip: according to Measurement While Drilling Data and stratigraphic dip relation, it is judged that bore in fact
Mutual meet relation between track and substratum；Described Measurement While Drilling Data includes the vertical depth of positive drilling well, depth measurement, hole angle, side
Parallactic angle；
6.3) anticipation of drill bit earth layer in front situation and well track adjust: according to up-to-date guided modes, by producing earth layer in front
Shape, the judgement of structure situation, in conjunction with the analysis of first two steps, walk at high-quality purpose oil gas interval to greatest extent controlling well track
For principle, well track is made monitoring in real time and adjusts, guide orientation construction.
The beneficial effect comprise that: the present invention is directed to initial guided modes in prior art immobilize be difficult to full
Full international standard drilling guidance, it is provided that a kind of Seismology and Geology integrated guidance method that can revise guided modes in real time, the present invention exists
The guided modes of different drilling phases is change, and becomes closer to the geology fact that drilling well discloses, the most finely, symbol
Close the real-time that horizontal drilling guides, it is ensured that horizontal well can accurately enter target zone, and efficiently walks in target zone.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the initial guided modes of the embodiment of the present invention；
Fig. 2 is each reference lamina Seismic reflection character figure of embodiment of the present invention region；
Fig. 3 is each reference lamina lithology and the electrical property feature figure of embodiment of the present invention region；
Fig. 4 is the velocity field real-time update flow chart that the present invention proposes；
Fig. 5 is the modified model guided modes in embodiment of the present invention implementation process according to new drilled well acquisition of information；
Fig. 6 is that the embodiment of the present invention enters target spot vertical depth prognostic chart；
Fig. 7 is according to entering the up-to-date guided modes of acquisition of information after target in embodiment of the present invention implementation process；
Fig. 8 is embodiment of the present invention live effect figure；
Fig. 9 is embodiment of the present invention method flow diagram.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, to the present invention
It is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit
Determine the present invention.
As it is shown in figure 9, a kind of horizontal drilling Real-time Seismic geological syntheses guidance method, comprise the following steps:
1) in known oil gas field work area, existing three-dimensional prestack time is turned deep seismic data and explains, implement work area geology structure
Make feature and purpose oil-gas Layer structural configuration, be initial guided modes to cross the seismic profile of well bore track to be drilled；
2) lead a well rock core, well logging and well-log information according to the finishing drilling of oil gas field work area, regional stratum is divided, determines region
The lithology of each reference lamina and purpose oil-gas Layer and adjacent formations, electrically and Seismic reflection character；
3), before positive drilling well enters target, collect the new drilled well of acquisition in time and bore the coordinate of reference lamina characteristic point, reinforcing the heart height above sea level and vertical depth in fact
Data, carry out real-time update, and utilize most current speed field that three-dimensional prestack time seismic data is turned depths reason velocity field；
Then, in up-to-date prestack time turns deep seismic data cube, the seismic profile of decimated positive well-drilling borehole track is led as modified model
To model；
Velocity field real time updating method is as follows: collect in time new drilled well real bore the coordinate of reference lamina characteristic point, reinforcing the heart height above sea level and
Vertical depth data, on the premise of old velocity field is as quality control, calculate Error Trend face；In conjunction with obtaining initial guided modes
Velocity field Error Trend face is corrected；Volume is repaiied on the premise of finally the Error Trend face after correction being carried out quality control
Whole district's 3D velocity field；
4) when target will be entered after positive drilling well is bored and met reference lamina, according to the neighbouring vertical thickness of oil-gas Layer led a well or bored offset well, knot
Close reference lamina feature and modified model guided modes, comprehensively analyze and calculate, it was predicted that positive drilling well enters the target spot height above sea level degree of depth, goes forward side by side
Row enters track optimizing before target；
5) after positive drilling well enters target, if the target zone degree of depth in guided modes and the real absolute error piercing the target spot target zone degree of depth
Exceed the 10% of target zone thickness, utilize this to enter the target spot real brill coordinate of reference lamina characteristic point, reinforcing the heart height above sea level and vertical depth number the most in time
Again update according to velocity field, obtain the most up-to-date guided modes；
6) under the guidance of up-to-date guided modes, analyze in conjunction with real boring, carry out horizontal segment guiding.
Step 6) enters the horizontal segment after target guide and can be subdivided into three aspects: drill bit location confirmation in destination layer,
Drilling direction confirms with the relation of stratigraphic dip, and drill bit earth layer in front situation anticipation and well track adjust；
6.1) drill bit location confirmation in destination layer: according to reference lamina feature analysis, survey in conjunction with well logging lithology, gas and bore the time-division
Analysis, launches the research of substratum fine correlation, determines the substratum residing for drill bit and away from the distance at the bottom of this substratum top；Such as guided modes
The target zone degree of depth exceedes the 10% of target zone thickness with real target zone degree of depth absolute error of boring, and need to bore target zone characteristic point according to real
Coordinate, reinforcing the heart height above sea level and vertical depth data carry out velocity field update with guided modes substitute；
6.2) drilling direction confirms with the relation of stratigraphic dip: according to Measurement While Drilling Data and stratigraphic dip relation, it is judged that bore in fact
Mutual meet relation between track and substratum；Described Measurement While Drilling Data includes the vertical depth of positive drilling well, depth measurement, hole angle, side
Parallactic angle；
6.3) anticipation of drill bit earth layer in front situation and well track adjust: according to up-to-date guided modes, by producing earth layer in front
Shape, the judgement of structure situation, in conjunction with the analysis of first two steps, walk at high-quality purpose oil gas interval to greatest extent controlling well track
For principle, well track is made monitoring in real time and adjusts, guide orientation construction.
Further the inventive method is illustrated below in conjunction with instantiation and schematic diagram:
1) in known oil gas field work area, three-dimensional prestack time is turned deep seismic data and explains, to cross well bore track to be drilled
Seismic profile be initial guided modes.As it is shown in figure 1, mark platform, A target spot, B target spot projected position on section, A target
Point and the B target spot height above sea level degree of depth, away from, A-B horizontal range before target, A-B stratigraphic dip.
2) lead based on a well rock core, well logging and well-log information by the finishing drilling of oil gas field work area, regional stratum divided,
Determine each reference lamina in region and purpose oil-gas Layer and the lithology of adjacent formations, electrical and Seismic reflection character, guided for follow-up
In journey, the determination of bit location lays the foundation.Fig. 2 is each reference lamina (P1、sand-top、O3W) response on seismic profile is special
Levying, Fig. 3 is each substratum of oil-gas Layer and overlying turbid long-pending sand response characteristic on log, and 1. the target zone of horizontal development well is
~ 3. substratum, thickness about 40m.
3) positive drilling well is before three open, and has new well finishing drilling in oil gas field work area.Now, new drilled well real brill reference lamina is collected
The coordinate of characteristic point, reinforcing the heart height above sea level and vertical depth data, carry out real-time update, more new technological process as shown in Figure 4 to velocity field.
4) utilize most current speed field that three-dimensional prestack time seismic data is turned depths reason, then obtain modified model and guide
Model, track before entering target is optimized by last foundation modified model guided modes.As it is shown in figure 5, compared with original guided modes,
A target spot in modified model guided modes, the B target spot prediction height above sea level degree of depth the most relatively before deep 53m, 95m；A-B stratum form is by it
Front micro-have a down dip (0.22 °) has become two sections of amplitudes bigger have a down dip (1.5 °, 5.5 °).
5) three open target before, bore and meet after turbid long-pending sand reference lamina (sand-top), in conjunction with reference lamina feature (Fig. 2, Fig. 3) and
Modified model guided modes (Fig. 5), again predicts that into the target spot height above sea level degree of depth be-2718m, as shown in Figure 6, optimizes track further.
6) after entering target, real bore the A target spot height above sea level degree of depth be the A target spot height above sea level degree of depth in-2718m, with modified model guided modes (-
2723m, Fig. 5) absolute error be 5m, exceeded the 10% of major pay thickness (40m).Therefore, mesh at real brill A target spot is utilized
The coordinate of layer, reinforcing the heart height above sea level and vertical depth data, again carry out velocity field real-time update and turn with three-dimensional prestack time seismic data
Depths is managed, and obtains up-to-date guided modes.As it is shown in fig. 7, A-B stratum form is had a down dip change by the big section of two in modified model guided modes
In order to six segments in up-to-date guided modes rise and fall.
7) with up-to-date guided modes for instructing, combine the position in destination layer of drill bit during real boring, drilling direction and
The relation of stratigraphic dip, carries out drilling guidance to horizontal segment, is eventually led to effect fine.In Fig. 8, A-B horizontal segment 1. ~ the least
The layer rate of walking is 100%.
By comparing, the present invention is change at the guided modes of different drilling phases, and becomes closer to drilling well and take off
The geology shown is true, and the most finely, this has met the real-time that horizontal drilling guides.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted,
And all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (2)
1. a horizontal drilling Real-time Seismic geological syntheses guidance method, it is characterised in that comprise the following steps:
1) in known oil gas field work area, existing three-dimensional prestack time is turned deep seismic data and explains, implement work area geology structure
Make feature and purpose oil-gas Layer structural configuration, be initial guided modes to cross the seismic profile of well bore track to be drilled；
2) lead a well rock core, well logging and well-log information according to the finishing drilling of oil gas field work area, regional stratum is divided, determines region
The lithology of each reference lamina and purpose oil-gas Layer and adjacent formations, electrically and Seismic reflection character；
3), before positive drilling well enters target, collect the new drilled well of acquisition in time and bore the coordinate of reference lamina characteristic point, reinforcing the heart height above sea level and vertical depth in fact
Data, carry out real-time update, and utilize most current speed field that three-dimensional prestack time seismic data is turned depths reason velocity field；
Then, in up-to-date prestack time turns deep seismic data cube, the seismic profile of decimated positive well-drilling borehole track is led as modified model
To model；
Velocity field real time updating method is as follows: collect in time new drilled well real bore the coordinate of reference lamina characteristic point, reinforcing the heart height above sea level and
Vertical depth data, on the premise of old velocity field is as quality control, calculate Error Trend face；In conjunction with obtaining initial guided modes
Velocity field Error Trend face is corrected；Volume is repaiied on the premise of finally the Error Trend face after correction being carried out quality control
Whole district's 3D velocity field；
4) when target will be entered after positive drilling well is bored and met reference lamina, according to the neighbouring vertical thickness of oil-gas Layer led a well or bored offset well, knot
Close reference lamina feature and modified model guided modes, comprehensively analyze and calculate, it was predicted that positive drilling well enters the target spot height above sea level degree of depth, goes forward side by side
Row enters track optimizing before target；
5) after positive drilling well enters target, if the target zone degree of depth in guided modes and the real absolute error piercing the target spot target zone degree of depth
Exceed the 10% of target zone thickness, utilize this to enter the target spot real brill coordinate of reference lamina characteristic point, reinforcing the heart height above sea level and vertical depth number the most in time
Again update according to velocity field, obtain the most up-to-date guided modes；
6) under the guidance of up-to-date guided modes, analyze in conjunction with real boring, carry out horizontal segment guiding.
Horizontal drilling the most according to claim 1 real-time geology integrated guidance method, it is characterised in that in described step 6)
Enter the guiding of the horizontal segment after target and can be subdivided into three aspects: drill bit location confirmation in destination layer, drilling direction inclines with stratum
The relation at angle confirms, drill bit earth layer in front situation anticipation and well track adjust；
6.1) drill bit location confirmation in destination layer: according to reference lamina feature analysis, survey in conjunction with well logging lithology, gas and bore the time-division
Analysis, launches the research of substratum fine correlation, determines the substratum residing for drill bit and away from the distance at the bottom of this substratum top；Such as guided modes
The target zone degree of depth exceedes the 10% of target zone thickness with real target zone degree of depth absolute error of boring, and need to bore target zone characteristic point according to real
Coordinate, reinforcing the heart height above sea level and vertical depth data carry out velocity field update with guided modes substitute；
6.2) drilling direction confirms with the relation of stratigraphic dip: according to Measurement While Drilling Data and stratigraphic dip relation, it is judged that bore in fact
Mutual meet relation between track and substratum；Described Measurement While Drilling Data includes the vertical depth of positive drilling well, depth measurement, hole angle, side
Parallactic angle；
6.3) anticipation of drill bit earth layer in front situation and well track adjust: according to up-to-date guided modes, by producing earth layer in front
Shape, the judgement of structure situation, in conjunction with the analysis of first two steps, walk at high-quality purpose oil gas interval to greatest extent controlling well track
For principle, well track is made monitoring in real time and adjusts, guide orientation construction.
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| CN106894761A (en) * | 2017-01-13 | 2017-06-27 | 武汉时代地智科技股份有限公司 | Using the geosteering method of the geosteering model of time-domain seismic volume |
| CN106940450A (en) * | 2017-01-13 | 2017-07-11 | 武汉时代地智科技股份有限公司 | Geosteering method for establishing model based on time-domain seismic volume |
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