CN104265279B - Logging-while-drilling curve prediction method under fault condition - Google Patents
Logging-while-drilling curve prediction method under fault condition Download PDFInfo
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- CN104265279B CN104265279B CN201410367695.7A CN201410367695A CN104265279B CN 104265279 B CN104265279 B CN 104265279B CN 201410367695 A CN201410367695 A CN 201410367695A CN 104265279 B CN104265279 B CN 104265279B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005553 drilling Methods 0.000 title claims abstract description 14
- 238000003325 tomography Methods 0.000 claims description 21
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 3
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012706 support-vector machine Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a logging while drilling curve prediction method under fault conditions, which comprises the following steps: and on the basis of reference well information beside a logging-while-drilling operation well, combining a track along with drilling and a stratum model, calculating a logging prediction curve along a well track, comparing the logging prediction curve with an actual drilling curve, judging whether the established stratum model is correct or not, and correcting the stratum model. The invention not only can utilize the small layer comparison result of the reference well, but also can accurately express various faults, and can predict the curve along the well track under the control of the fault and the stratum position, thereby improving the accuracy of the predicted curve.
Description
Technical field
The present invention relates to a kind of well logging curve prediction method under the conditions of tomography, belongs to drilling prospection development technique neck
Domain.
Background technology
In the exploration and development of Sichuan Basin stone carbon system reservoir, often bore and run into high-dip structure and tomography.At present with brill
The method that curve prediction is carried out in well logging assumes that what is carried out in the case of vertical without tomography or tomography, for example, 2010 06
Phase《Oil drilling technology》A kind of disclosed log Forecasting Methodology based on support vector machine, by offset well set up support to
Amount machine forecast model is predicted to current borehole logging tool curve, while introducing well logging of the Measurement While Drilling Data to current Jing Zuantouchu
Curve carries out being updated with brill.
And tomography Jing is commonly present and not vertical under conditions down-hole, it is assumed that under the conditions of the curve prediction that carries out it is obvious
Being actually needed for scene is can not meet, prior art is primarily present following shortcoming：1. stratigraphic horizon line does not have geological Significance；2. adopt
Fault block is managed with demarcation line, demarcation line does not have geological Significance；3. the layer bit line between fault block is not set up mutual relation,
When the layer position to a fault block operates, other fault blocks can not synchronously change；4. carry out during reversed fault curve to existing
Prediction.
The content of the invention
It is an object of the invention to overcome the problems referred to above that prior art is present, there is provided well logging under the conditions of a kind of tomography
Curve prediction method.The present invention can carry out accurate table not only using the detail correlation of reservoir bed result with reference to well to all kinds of tomographies
Reach, the curve prediction along well track is carried out under the control of tomography and stratigraphic horizon, improve the precision of prediction curve.
For achieving the above object, the technical solution used in the present invention is as follows：
A kind of well logging curve prediction method under the conditions of tomography, it is characterised in that：With the ginseng by well logging operation well
Based on examining well information, with reference to the track with drilling well and stratigraphic model, the logging prediction curve along well track is calculated, will be surveyed
Well prediction curve and real brill curve comparison, judge whether set up stratigraphic model is correct, and stratigraphic model is modified.
Methods described specifically includes following steps：
A, to reference to well interval of interest, determining the layer position of representative curve（Depth）；
B, it is determined that representative curve layer position in, calculate well track, calculate characteristic curve value and substratum
Vertical depth；
C, by step b result of calculation import stratigraphic model, the relation of well track and stratigraphic model is set up, using chain
Table manages stratigraphic model, and each fault block has a tomography and multiple bed boundarys；
D, according to the stratigraphic model relation set up, judge the fault block residing for the point on well track, then judge successively should
The residing layer position of point；
Point in e, respectively calculation procedure d is represented respectively to the vertical dimension of two line segments in layer top and layer bottom with L1 and L2；
F, calculating well track current point are corresponding to reference to well vertical depth TVD；
G, the value that characteristic curve is then found according to the size of TVD；
H, each point to well track are predicted and obtain a continuous logging prediction curve；
I, logging prediction curve is bored into curve comparison with real, judge whether set up stratigraphic model is correct, to stratum mould
Type is modified.
In step a, the well logging Qu Jinhang for selecting cross directional variations stable is finely divided, and takes natural gamma（GR）, electricity
Resistance rate（RT）Curve determines the layer position of representative curve as standard curve.
In step b, hole angle is input into（DEV）And direction of deflection（DAZ）, using curvature method well track, meter are calculated
Calculate with vertical depth as the characteristic curve value for indexing and the vertical depth of substratum.
In step f, if layer top correspondence is TVD1 with reference to the vertical depth of well, layer bottom correspondence refers to the vertical depth of well
For TVD2, then well track current point is corresponding to the computing formula with reference to well vertical depth：
。
In step g, the value computing formula of characteristic curve is：
；
In above formula, V is the curve values of correspondence TVD, and T1 is the vertical depth of former point, and T2 is the vertical depth of latter point,
V1 is the curve values of former point, and V2 is the curve values of latter point.
Using it is an advantage of the current invention that：
First, the present invention can be calculated along the prediction curve of well track in the case of complicated fault is present, by boring curve with real
Relative analyses, can differentiate that stratigraphic model is whether correct, the amendment of stratigraphic model is and guided, so as to improve geologic steering drilling
Reservoir Drilling ratio, improves drilling benefit.
2nd, the present invention can subtly mark off stratum variations in detail longitudinally and laterally because adopting the stratum detail correlation of reservoir bed；
Using visual Modifying model, making the amendment of stratigraphic model becomes directly perceived and quick；Fault block management has been used, prediction curve has been made
It is possibly realized in the presence of having reversed fault；The layer position management technique with STRATIGRAPHIC SIGNIFICANCE has been used, curve prediction has been made just
In realization.
Description of the drawings
Fig. 1 is that the fault block residing for the point that the present invention is judged on well track judges successively that again the layer position residing for the point is illustrated
Figure.
Specific embodiment
The technical problem to be solved：One is solved the problems, such as with reference to the detail stratigraphic division of well stratum；Two be well track with
The relation of stratigraphic model；Three is well logging curve prediction problem under the conditions of tomography；Four are solved computational methods by calculating
The problem that machine language is realized.Below it is specifically described.
A kind of well logging curve prediction method under the conditions of tomography, including：Believed with the reference well by well logging operation well
Based on breath, with reference to the track with drilling well and stratigraphic model, the logging prediction curve along well track is calculated, by logging prediction
Curve and real brill curve comparison, judge whether set up stratigraphic model is correct, and stratigraphic model is modified.
Methods described specifically includes following steps：
A, to carefully analyzing with reference to well interval of interest, the well logging Qu Jinhang for selecting cross directional variations more stable finely draws
Point, take natural gamma（GR）, resistivity（RT）Curve determines the layer position of representative curve as standard curve
（Depth）；Fine division can adopt prior art.
B, it is determined that representative curve layer position in, be input into hole angle（DEV）And direction of deflection（DAZ）, application
Curvature method calculates well track, calculates with vertical depth as the characteristic curve value for indexing and the vertical depth of substratum.
C, by step b result of calculation import stratigraphic model, the relation of well track and stratigraphic model is set up, using chain
Table manages stratigraphic model, and each fault block has a tomography and multiple bed boundarys.
D, according to tomography, the stratigraphic model relation set up, first determine whether out the fault block residing for the point on well track, then according to
The secondary layer position judged residing for the point, as shown in Figure 1.
Point in e, respectively calculation procedure d is represented respectively to the vertical dimension of two line segments in layer top and layer bottom with L1 and L2.
F, set layer top correspondence with reference to well vertical depth as TVD1, layer bottom correspondence with reference to well vertical depth be TVD2, then
Well track current point is corresponding to reference to the computing formula of well vertical depth：
。
G, the value that characteristic curve can be then found according to the size of TVD, its computing formula is：
In above formula, V is the curve values of correspondence TVD, and T1 is the vertical depth of former point, and T2 is the vertical depth of latter point,
V1 is the curve values of former point, and V2 is the curve values of latter point.
H, each point to well track are predicted and be just obtained a continuous logging prediction curve.
I, logging prediction curve is bored into curve comparison with real, so that it may judge whether set up stratigraphic model is correct, and then
Stratigraphic model is modified.
To sum up, the present invention can be calculated along the prediction curve of well track in the case of complicated fault is present, by boring bent with real
The relative analyses of line, can differentiate whether stratigraphic model is correct, and guides the amendment of stratigraphic model, be conducive to the brill for improving reservoir to meet
Rate.The easy-to-use computer language of algorithm is realized.
The preferred embodiments of the present invention are these are only, the present invention is not limited to, for those skilled in the art
For member, the technical solution adopted in the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention,
Any modification, equivalent substitution and improvements made etc., should be included within the scope of the present invention.The present invention is without detailed
The technological means of elaboration, can adopt prior art means.
Claims (5)
1. a kind of well logging curve prediction method under the conditions of tomography, it is characterised in that：With the reference by well logging operation well
Based on well information, with reference to the track with drilling well and stratigraphic model, the logging prediction curve along well track is calculated, will be logged well
Prediction curve and real brill curve comparison, judge whether set up stratigraphic model is correct, and stratigraphic model is modified；
Methods described specifically includes following steps：
A, to reference to well interval of interest, determining the layer position of representative curve；
B, it is determined that representative curve layer position in, calculate well track, calculate the vertical of characteristic curve value and substratum
Depth；
C, by step b result of calculation import stratigraphic model, the relation of well track and stratigraphic model is set up, using chained list pipe
Reason stratigraphic model, each fault block has a tomography and multiple bed boundarys；
D, according to the relation of the well track and stratigraphic model set up, judge the fault block residing for the point on well track, then according to
The secondary layer position judged residing for the point；
Point in e, respectively calculation procedure d is represented respectively to the vertical dimension of two line segments in layer top and layer bottom with L1 and L2；
F, calculating well track current point are corresponding to the vertical depth TVD with reference to well；
G, the value that characteristic curve is found according to the size of TVD；
H, each point to well track are predicted and obtain a continuous logging prediction curve；
I, logging prediction curve is bored into curve comparison with real, judge whether set up stratigraphic model is correct, and stratigraphic model is entered
Row amendment.
2. well logging curve prediction method under the conditions of tomography according to claim 1, it is characterised in that：Step a
In, the log for selecting cross directional variations stable is finely divided, and takes natural gamma GR, resistivity RT curve as standard
Curve, determines the layer position of representative curve.
3. well logging curve prediction method under the conditions of tomography according to claim 1 and 2, it is characterised in that：The step
In rapid b, hole angle DEV and direction of deflection DAZ is input into, using curvature method well track is calculated, calculated with vertical depth as index
Characteristic curve value and substratum vertical depth.
4. well logging curve prediction method under the conditions of tomography according to claim 3, it is characterised in that：Step f
In, if layer top correspondence is TVD1 with reference to the vertical depth of well, layer bottom correspondence is TVD2 with reference to the vertical depth of well, then well track
Current point is corresponding to reference to the computing formula of well vertical depth：
。
5. well logging curve prediction method under the conditions of tomography according to claim 4, it is characterised in that：Step g
In, the value computing formula of characteristic curve is：
；
In above formula, V is the curve values of correspondence TVD, and T1 is the vertical depth of former point, and T2 is the vertical depth of latter point, and V1 is
The curve values of former point, V2 is the curve values of latter point.
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|---|---|---|---|
| CN201410367695.7A CN104265279B (en) | 2014-07-30 | 2014-07-30 | Logging-while-drilling curve prediction method under fault condition |
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| CN201410367695.7A CN104265279B (en) | 2014-07-30 | 2014-07-30 | Logging-while-drilling curve prediction method under fault condition |
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| CN104265279B true CN104265279B (en) | 2017-05-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108625842A (en) * | 2017-03-22 | 2018-10-09 | 中国石油化工股份有限公司 | A kind of wellbore trace control method and system |
| CN107091081B (en) * | 2017-06-02 | 2020-11-03 | 中国石油天然气股份有限公司 | Method and system for early warning of drilling fault in drilling process |
| CN108547611B (en) * | 2018-03-01 | 2022-02-11 | 杭州迅美科技有限公司 | Method for rapidly simulating logging of electromagnetic wave resistivity while drilling in complex environment of horizontal well |
| CN110231660B (en) * | 2019-05-15 | 2021-04-27 | 防灾科技学院 | Method for determining dislocation quantity of blind active fault by using susceptibility logging method |
| CN112901070B (en) * | 2019-12-03 | 2023-06-30 | 中国石油天然气股份有限公司 | Method for tracking horizontal well while drilling and control method for controlling drilling direction of drill bit |
| CN113379907B (en) * | 2020-03-10 | 2024-08-27 | 中国石油天然气股份有限公司 | Method and device for constructing broken block geological model |
| CN113743175B (en) * | 2020-10-21 | 2024-05-31 | 中国石油天然气集团有限公司 | Stratum inclination analysis method and device, computer equipment and storage medium |
| CN114564800B (en) * | 2022-02-25 | 2022-10-11 | 北京金阳普泰石油技术股份有限公司 | Vertical thickness longitudinal fitting method and system for horizontal well logging curve |
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| CA2155918C (en) * | 1994-08-15 | 2001-10-09 | Roger Lynn Schultz | Integrated well drilling and evaluation |
| WO2005071222A1 (en) * | 2004-01-20 | 2005-08-04 | Saudi Arabian Oil Company | Real time earth model for collaborative geosteering |
| US7529624B2 (en) * | 2007-02-21 | 2009-05-05 | Geomechanics International, Inc. | Method and apparatus for remote characterization of faults in the vicinity of boreholes |
| US8245795B2 (en) * | 2009-12-08 | 2012-08-21 | Schlumberger Technology Corporation | Phase wellbore steering |
| CN103046868B (en) * | 2012-12-28 | 2014-10-22 | 中国石油集团川庆钻探工程有限公司 | Integrated geosteering method for horizontal well |
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