CN104314560B - Non-equal proportion stratum comparison method and device before horizontal well window entering - Google Patents
Non-equal proportion stratum comparison method and device before horizontal well window entering Download PDFInfo
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- CN104314560B CN104314560B CN201410424313.XA CN201410424313A CN104314560B CN 104314560 B CN104314560 B CN 104314560B CN 201410424313 A CN201410424313 A CN 201410424313A CN 104314560 B CN104314560 B CN 104314560B
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- 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
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- 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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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
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Abstract
The invention discloses a method and a device for comparing non-equal-proportion stratums before horizontal wells enter a window, wherein the method comprises the following steps: calculating the proportion of a forward drilling logging contrast profile according to the collected adjacent drilled vertical well logging contrast profile, the data of the forward drilling horizontal well logging while drilling, well deviation data and formation inclination data, printing the logging contrast profile corrected to be vertical depth of the forward drilling horizontal well tracking while drilling according to the proportion of the forward drilling logging contrast profile, comparing with the adjacent drilled vertical well logging contrast profile, and comparing with the original design of the forward drilling horizontal well according to the contrast result so as to control the window entry well deviation angle; the comparison device comprises a collection module, a calculation module and a comparison module. The method and the device realize accurate judgment of the drilled horizon and prediction of the window entry point, so that the horizontal well can smoothly drill into an oil layer.
Description
Technical field
Enter the Strata Comparison field before window the present invention relates to horizontal well, more particularly to a kind of horizontal well, which enters non-wait before window, to be compared
Example Strata Comparison method.
Background technology
Horizontal well is to ensure accurately to enter window in implementation process, and early stage Strata Comparison is most important, it is necessary to according to horizontal well
Enter the real brill situation of inclination section before window, it is careful to be carried out using well logging and well logging (LWD) data and surrounding fixed well data
Contrast, judge depth and the reservoir change of target zone overlying reference lamina, so accurate prediction level well purpose layer depth with just
The gap of horizontal well drilling original design depth, so as to carry out trajectory of horizontal adjustment in time.
During the Strata Comparison before horizontal well enters window, traditional control methods is by behind oblique deep school to vertical depth, with phase
Contrasted in proportion with adjacent drilling straight-hole.When parallel occurrence stratum is passed through in well track, formation thickness that track is passed through etc.
Actual (real) thickness in stratum, this control methods is applicable.But when there is certain inclination angle on stratum, this control methods will
Cause certain error.When horizontal well angle buildup interval well track, which is passed through, has a down dip occurrence stratum, according to the stratum that equal proportion school is oblique
Thickness is more than the actual (real) thickness on stratum；It is small according to the oblique formation thickness in equal proportion school when updip occurrence stratum is passed through in well track
Actual (real) thickness in stratum, deviation is produced to the understanding bored up to target zone.
The content of the invention
In order to overcome the above-mentioned deficiency of existing control methods, well of improving the standard enters the contrast precision before window, and Accurate Prediction goes out
Enter the formation variation feature before window, to carry out track adjustment in time, horizontal well is smoothly entered window, the present invention provides a kind of level
Well enters the non-equal proportion Strata Comparison method before window and contrast device.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of horizontal well enters the non-equal proportion Strata Comparison method before window, is contrasted according to the adjacent borehole logging tool of drill straight of collection
Section, positive horizontal well drilling well logging data, hole deviation data and stratigraphic dip data, calculate positive brill well logging contrast section ratio,
The well logging being corrected into after the vertical depth contrast for printing positive horizontal well drilling drilling tracking in described positive brill well logging contrast section ratio is cutd open
Face, is contrasted with the adjacent borehole logging tool of drill straight contrast section, according to comparing result and the progress pair of positive horizontal well drilling original design
Than so as to control into window hole angle.
A kind of above-mentioned horizontal well enters the non-equal proportion Strata Comparison method before window, and specific method is：
Step 1：The adjacent borehole logging tool of drill straight contrast section is collected, the adjacent borehole logging tool of drill straight contrast section ratio is K1；
Step 2：Positive horizontal well drilling well logging data, hole deviation data are collected, the hole angle that can read any position is
β；
Step 3：Stratigraphic dip α is collected, and judges pendage type；
Step 4：Attitude of stratum be for horizontal well path have a down dip inclination when, planned well through stratum vertical depth H with it is adjacent
Drilling straight-hole differs △ h through the depth h on stratum, there is the relation of formula (1) between H and h, i.e., when planned well is entered with β angles
When entering the stratum that inclination angle is α, the vertical depth through stratum passes through the ratio of depth of stratum with adjacent drilling straight-hole, if this compares
It is worth for λ；
λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (1)1Again divided by λ calculates a positive brill
Borehole logging tool contrast section ratio K2；
Attitude of stratum is when being tilted for horizontal well path updip, adjacent drilling straight-hole passes through the depth h and design on stratum
Well differs △ h through the vertical depth H on stratum, there is the relation of formula (2) between H and h, i.e., when planned well with β angles enters inclination angle
For α stratum when, vertical depth and adjacent drilling straight-hole through stratum pass through the ratio of depth of stratum, if this ratio is λ；
λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (2)1Again divided by λ calculates a positive brill
Borehole logging tool contrast section ratio K2；
Step 5：In the positive drilling well well logging contrast section ratio K2Print being corrected into for positive horizontal well drilling drilling tracking vertical
Well logging contrast section after depth, and be K with ratio1The adjacent borehole logging tool of drill straight contrast section contrasted, according to contrast knot
Fruit is contrasted with positive horizontal well drilling original design, so as to control the hole angle into window.
A kind of above-mentioned horizontal well enters the non-equal proportion Strata Comparison method before window, the described hole angle side controlled into window
Method is：When judging to be more than positive horizontal well drilling original design distance into window distance, reduce well compared with positive horizontal well drilling original design
Creep at oblique angle；When judging to be less than positive horizontal well drilling original design distance into window distance, increase compared with positive horizontal well drilling original design
Plus hole angle drilling；When judge into window distance and positive horizontal well drilling original design apart from it is consistent when, can be according to positive horizontal well drilling
Original design continues to creep into.
A kind of horizontal well enters the non-equal proportion Strata Comparison device before window, including：
Collection module, the adjacent borehole logging tool of drill straight contrast section, positive horizontal well drilling well logging data, well for collection
Oblique data and stratigraphic dip data；
Computing module, for collecting data according to collection module, calculates positive brill well logging contrast section ratio；
Comparison module, the correction for printing positive horizontal well drilling drilling tracking in described positive brill well logging contrast section ratio
Section is contrasted into the well logging after vertical depth, is contrasted with the adjacent borehole logging tool of drill straight contrast section, according to comparing result and positive brill
Horizontal well original design is contrasted, so as to control into window hole angle.
A kind of above-mentioned horizontal well enters the non-equal proportion Strata Comparison device before window, specifically includes：
Collection module, is further used for collecting the adjacent borehole logging tool of drill straight contrast section, the adjacent borehole logging tool of drill straight contrast
Section ratio is K1；Positive horizontal well drilling well logging data are collected, hole deviation data, the hole angle that can read any position is β；
Stratigraphic dip α is collected, and judges pendage type；
Computing module, it is that planned well passes through stratum when having a down dip to tilt for horizontal well path to be further used for attitude of stratum
Vertical depth H differ △ h through the depth h on stratum with adjacent drilling straight-hole, the relation that there is formula (1) between H and h is worked as
Planned well using β angles enter inclination angle as α stratum when, through vertical depth and the adjacent drilling straight-hole on stratum through depth of stratum
Ratio, if this ratio is λ；
λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (1)1Again divided by λ calculates a positive brill
Borehole logging tool contrast section ratio K2；
Attitude of stratum is when being tilted for horizontal well path updip, adjacent drilling straight-hole passes through the depth h and design on stratum
Well differs △ h through the vertical depth H on stratum, there is the relation of formula (2) between H and h, i.e., when planned well with β angles enters inclination angle
For α stratum when, vertical depth and adjacent drilling straight-hole through stratum pass through the ratio of depth of stratum, if this ratio is λ；
λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (2)1Again divided by λ calculates a positive brill
Borehole logging tool contrast section ratio K2；
Comparison module, is further used in the positive drilling well well logging contrast section ratio K2Print positive horizontal well drilling drilling follow
The well logging being corrected into after the vertical depth contrast section of track, and be K with ratio1The adjacent borehole logging tool of drill straight contrast section carry out pair
Than being contrasted according to comparing result with positive horizontal well drilling original design, so as to control the hole angle into window.
A kind of above-mentioned horizontal well enters the non-equal proportion Strata Comparison device before window, and described comparison module is further used
In when judging to be more than positive horizontal well drilling original design distance into window distance, reduce hole angle compared with positive horizontal well drilling original design
Drilling；When judging to be less than positive horizontal well drilling original design distance into window distance, increase well compared with positive horizontal well drilling original design
Creep at oblique angle；When judge into window distance and positive horizontal well drilling original design apart from it is consistent when, can be original according to positive horizontal well drilling
Design continues to creep into.
The horizontal well that the present invention is provided enters the non-equal proportion Strata Comparison method before window, by studying attitude of stratum and level
Well enters the relation of window Qian Jing tracks, using mathematical principle, and calculated level well, which enters window Qian Jing tracks and adjacent drilling straight-hole, to be contrasted
Proportionate relationship, it is accurate to judge to have bored up to layer position, predict that, into window point, Guidance Levels well accurately enters window, solve tilted stratum brill
Horizontal Well Drilling meets the problem of strata condition judges difficult, and formation variation situation can be judged early, wellbore trace is adjusted in time, is water
Horizontal well smoothly enters window and laid a solid foundation.
Brief description of the drawings
Fig. 1 be attitude of stratum provided in an embodiment of the present invention be for horizontal well path have a down dip in tilted stratum inclined shaft with it is straight
The relativity schematic diagram of well.
Fig. 2 is attitude of stratum provided in an embodiment of the present invention for for inclined shaft in horizontal well path updip tilted stratum and directly
The relativity schematic diagram of well.
Embodiment
Field conduct success rate of the present invention is high, implements 6 mouthfuls of water horizontal wells, enters window success rate 100%.Below in conjunction with the accompanying drawings to this
The embodiment of invention is described in further detail：
As shown in figure 1, be specifically described with the stratum that has a down dip, when stratigraphic dip is α, and planned well hole angle is β, design
Well with adjacent drilling straight-hole through the depth h on stratum differs △ h through the vertical depth H on stratum, there is formula (1) between H and h
Relation, i.e., when planned well enters inclination angle as α stratum using β angles, vertical depth and straight well through stratum pass through depth of stratum
Ratio, if this ratio be λ.
,, should to ensure the accuracy of contrast and the integrality on stratum when being contrasted with adjacent drilling straight-hole for tilted stratum
Positive drilling well is corrected into after vertical depth, the adjacent borehole logging tool of drill straight contrast section ratio K1Again divided by λ calculates a positive drilling well and surveyed
Well contrast section ratio K2, proportionally K2It is K to print well logging contrast section and ratio1The adjacent borehole logging tool of drill straight contrast
Section is contrasted.
Step 1：The adjacent borehole logging tool of drill straight contrast section is collected, the adjacent borehole logging tool of drill straight contrast section ratio is K1。
Step:2：Positive horizontal well drilling well logging data, hole deviation data are collected, the hole angle that can read contrast position is
β。
Step 3：The inclination alpha on contrast stratum is collected, and judges pendage type, such as Fig. 1 is that attitude of stratum is for water
Horizontal well track has a down dip inclination.
Step 4：λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (1)1Again divided by λ calculates one
Individual positive drilling well well logging contrast section ratio K2。
Step 5：K in proportion2Print positive horizontal well drilling drilling tracking be corrected into after vertical depth well logging contrast section, with than
Example is K1The adjacent borehole logging tool of drill straight contrast section contrasted, according to comparing result and positive horizontal well drilling original design progress
Contrast, judges to be more than positive horizontal well drilling original design distance into window distance, reduces hole deviation compared with positive horizontal well drilling original design
Angular bit enters, and judges to be less than positive horizontal well drilling original design distance into window distance, increases well compared with positive horizontal well drilling original design
Creep at oblique angle.
As shown in Fig. 2 be specifically described with updip stratum, it is adjacent when stratigraphic dip is α, and planned well hole angle is β
Drilling straight-hole with planned well through the vertical depth H on stratum differs △ h through the depth h on stratum, there is formula (2) between H and h
Relation, i.e., when planned well enters inclination angle as α stratum using β angles, vertical depth and adjacent drilling straight-hole through stratum are passed through
The ratio of depth of stratum, if this ratio is λ.
λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (2)1Again divided by λ calculates a positive brill
Borehole logging tool contrast section ratio K2.Proportionally K2It is K to print well logging contrast section and ratio1Adjacent drill straight borehole logging tool
Contrast section is contrasted.
Step 1：The adjacent borehole logging tool of drill straight contrast section is collected, the adjacent borehole logging tool of drill straight contrast section ratio is K1。
Step:2：Positive horizontal well drilling well logging data, hole deviation data are collected, the hole angle that can read any position is
β。
Step 3：Stratigraphic dip α is collected, and judges pendage type, such as Fig. 2 is that attitude of stratum is directed to horizontal well path
Updip is tilted.
Step 4：λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (1)1Again divided by λ calculates one
Individual positive drilling well well logging contrast section ratio K2。
Step 5：K in proportion2Print positive horizontal well drilling drilling tracking be corrected into after vertical depth well logging contrast section, with than
Example is K1The adjacent borehole logging tool of drill straight contrast section contrasted, according to comparing result and positive horizontal well drilling original design progress
Contrast, judges to be more than positive horizontal well drilling original design distance into window distance, reduces hole deviation compared with positive horizontal well drilling original design
Angular bit enters, and judges to be less than positive horizontal well drilling original design distance into window distance, increases well compared with positive horizontal well drilling original design
Creep at oblique angle.
To on March 6th, 2014, co-occurrence 6 mouthfuls of water horizontal wells of tracking implementing of the present invention entered window success rate 100%.Show this hair
The bright Strata Comparison before horizontal well enters window has accuracy high, the characteristics of coincidence rate is high.
Embodiment 1：Official's 86-36L wells
The well location collects the fault block of oil field king 27 in the huge port officials of feudal dynasties, and oil-bearing layer position is the oil of one section of Eogene hole Dian Zu holes jujube III
Group, design, which is bored, meets oil reservoir 200m.Attitude of stratum has a down dip inclination for horizontal well path, when being drilled into 3189m (vertical depth 2974m), away from
The key horizon bottom depth 3149m (vertical depth 2958m) nearer from herein, 72 ° of hole angle, 8.6 ° of stratigraphic dip.
Enter the non-equal proportion Strata Comparison method before window according to horizontal well
Step 1：Collect the adjacent official 82-42 of drilling straight-hole borehole logging tools contrast section, official 82-42 borehole logging tools contrast section ratio
K1For 1:500.
Step:2：Positive horizontal well drilling well logging data, hole deviation data are collected, the hole angle β for reading contrast position is
72°。
Step 3：It is 8.6 ° to collect stratigraphic dip α, and judges pendage type, is that attitude of stratum is directed to horizontal well path
Have a down dip inclination.
Step 4：It is 1.87 to calculate λ according to formula (1), the adjacent borehole logging tool of drill straight contrast section ratio K1(1:500) again
Divided by λ calculates a positive drilling well well logging contrast section ratio K2For (1:935.4).
Step 5：K in proportion2(1:935.4) well logging being corrected into after the vertical depth contrast of positive horizontal well drilling drilling tracking is printed
Section, is K with ratio1(1:500) the adjacent official 82-42 of drilling straight-hole borehole logging tools contrast section is contrasted, official's 86-36L wells
The reference lamina at 3149m (vertical depth 2958m) place and official's 82-42 wells respective flag layer are 2936m, official 82-42 well 2936m reference laminas with
2957m distances in oil reservoir top are 21m, and window is entered in vertical depth 2997m (2958m+21m × 1.87) according to contrast prediction official 86-36L wells,
Enter window with design 2995m basically identical, can continue to creep into according to design.
If according to conventional equal proportion Strata Comparison, prediction official 86-36L wells enter window in vertical depth 2979m (2958m+21m),
Think that 16m (2995m-2979m) enters window in advance, it should as early as possible increase hole deviation angle, if be implemented, cause on the contrary it is late enter
Window, wastes drilling depth, bores and meets less oil reservoir.
Official 86-36L enters window smoothly, and well logging oil/gas show preferably, enters and adjusts timely after window, net horizontal section has deepened 130m,
Bore and meet oil reservoir 343.3m, stable yield is in 30t or so after operation.
Embodiment 2：Wind 45-18H wells
The well location is in the fault block of Zao 89, and oil-bearing layer position is the oily group of Eogene hole shop group aperture leakage 4, design
Bore and meet oil reservoir 230m.Attitude of stratum for horizontal well path updip tilt, when being drilled into 2655m (vertical depth 2584m), distance herein compared with
Near key horizon bottom depth 2640m (vertical depth 2578m), 63.9 ° of hole angle, 6.5 ° of stratigraphic dip.
Enter the non-equal proportion Strata Comparison method before window according to horizontal well
Step 1：Collect the adjacent borehole logging tool of the jujube of drilling straight-hole 87 contrast section, the borehole logging tool of jujube 87 contrast section ratio K1For 1:
500。
Step 2：Positive horizontal well drilling well logging data, hole deviation data are collected, the hole angle β for reading contrast position is
63.9°。
Step 3：It is 6.5 ° to collect stratigraphic dip α, and judges pendage type, is that attitude of stratum is directed to horizontal well path
Updip is tilted.
Step 4：It is 0.8113 to calculate λ according to formula (2), the adjacent borehole logging tool of drill straight contrast section ratio K1(1:500)
Again divided by λ calculates a positive drilling well well logging contrast section ratio K2For (1:405.65).
Step 5：K in proportion2(1:405.65) well logging pair being corrected into after vertical depth of positive horizontal well drilling drilling tracking is printed
It is K with ratio than section1(1:500) the adjacent borehole logging tool of the jujube of drilling straight-hole 87 contrast section is contrasted, wind 45-18H wells
The reference lamina at 2640m (vertical depth 2578m) place is 2570m, the well 2570m reference laminas of jujube 87 and oil reservoir with the well respective flag layer of official's jujube 87
It is 20m to push up 2590m distances, and window is entered in vertical depth 2594m (2578m+20m × 0.8113) according to contrast prediction wind 45-18H wells, than
Originally design estimated 2605m and enter window 11m in advance, increase hole angle drilling compared with design.
If according to conventional equal proportion Strata Comparison, prediction wind 45-18H wells enter window in vertical depth 2598m (2578m+20m),
Think that 7m (2605m-2598m) enters window in advance, although can also increase the drilling well of hole deviation angle, but increased speed can slow down,
If be implemented, window can be entered in advance, it is possible to drill oil reservoir in advance.
Wind 45-18H enters window smoothly, and well logging oil/gas show preferably, enters and adjusts timely after window, bore and meet oil reservoir 247.5m, go into operation
Stable yield is in 12t or so afterwards.
Embodiment 3：Wang14-33LJing
The well location collects oil field Guan142 block in the huge port officials of feudal dynasties, and oil-bearing layer position is the thick sandstone of Lower Mesozoic, and design, which is bored, meets oil
Layer 170m.Attitude of stratum has a down dip inclination for horizontal well path, when being drilled into 2711m (vertical depth 2574m), distance nearer mark herein
Will layer position bottom depth 2687m (vertical depth 2565m), 68 ° of hole angle, 9.2 ° of stratigraphic dip.
Enter the non-equal proportion Strata Comparison method before window according to horizontal well
Step 1：Collect the adjacent king 15-32 of drilling straight-hole borehole logging tools contrast section, king 15-32 borehole logging tools contrast section ratio
K1For 1:500.
Step:2：Positive horizontal well drilling well logging data, hole deviation data are collected, the hole angle β for reading contrast position is
68°。
Step 3：It is 9.2 ° to collect stratigraphic dip α, and judges pendage type, is that attitude of stratum is directed to horizontal well path
Have a down dip inclination.
Step 4：It is 1.67 to calculate λ according to formula (1), the adjacent borehole logging tool of drill straight contrast section ratio K1(1:500) again
Divided by λ calculates a positive drilling well well logging contrast section ratio K2For (1:835).
Step 5：K in proportion2(1:835) well logging being corrected into after the vertical depth contrast for printing positive horizontal well drilling drilling tracking is cutd open
Face, is K with ratio1(1:500) the adjacent king 15-32 of drilling straight-hole borehole logging tools contrast section is contrasted, Wang14-33LJing
The reference lamina at 2687 (vertical depth 2565m) places and king's 15-32 wells respective flag layer are 2558m, king 15-32 well 2558m reference laminas with
2573m distances in oil reservoir top are 15m, are entered according to contrast prediction Wang14-33LJing in vertical depth 2590.1m (2565m+15m × 1.67)
Window, early enters window 4.9m compared with design 2595m enters window, increases hole angle drilling compared with design.
If according to conventional equal proportion Strata Comparison, prediction official 86-36L wells enter window in vertical depth 2580m (2565m+15m),
Think that 15m enters window in advance, hole angle drilling well will be increased at faster speed, if be implemented, cause it is late enter window, waste into
Chi, bores and meets less oil reservoir.
King 14-33L enters window smoothly, and well logging oil/gas show preferably, but meets bottom water in order to avoid boring, and bores and meets oil reservoir 135m, throws
Postpartum, stable yield was in 20t or so.
It should be noted last that, above embodiment is merely illustrative of the technical solution of the present invention and unrestricted,
Although the present invention is described in detail with reference to example, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, it all should cover
Among scope of the presently claimed invention.
Claims (4)
1. a kind of horizontal well enters the non-equal proportion Strata Comparison method before window, it is characterised in that method is as follows：
Section, positive horizontal well drilling well logging data, hole deviation data and stratum are contrasted according to the adjacent borehole logging tool of drill straight of collection
Inclination data, calculates positive drilling well well logging contrast section ratio, and being logged well in described positive drilling well, the ratio printing of contrast section is positive to bore water
The well logging being corrected into after the vertical depth contrast section of horizontal well drilling tracking, is contrasted with the adjacent borehole logging tool of drill straight contrast section,
Contrasted according to comparing result with positive horizontal well drilling original design, so as to control into window hole angle；
Concretely comprise the following steps：
Step 1：The adjacent borehole logging tool of drill straight contrast section is collected, the adjacent borehole logging tool of drill straight contrast section ratio is K1；
Step 2：Positive horizontal well drilling well logging data are collected, hole deviation data, the hole angle that can read any position is β；
Step 3：Stratigraphic dip α is collected, and judges pendage type；
Step 4：Attitude of stratum be for horizontal well path have a down dip inclination when, positive horizontal well drilling through stratum vertical depth H with it is adjacent
Drilling straight-hole differs Δ h through the depth h on stratum, there is the relation of formula (1) between H and h, i.e., when positive horizontal well drilling is with β
When angle enters the stratum that inclination angle is α, the vertical depth through stratum passes through the ratio of depth of stratum with adjacent drilling straight-hole, if this
Individual ratio is λ；
<mrow>
<mi>&lambda;</mi>
<mo>=</mo>
<mfrac>
<mi>H</mi>
<mi>h</mi>
</mfrac>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mrow>
<mn>1</mn>
<mo>-</mo>
<mi>t</mi>
<mi>g</mi>
<mi>&alpha;</mi>
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<mi>g</mi>
<mi>&beta;</mi>
</mrow>
</mfrac>
<mo>...</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (1)1Again divided by λ calculates a positive drilling well well logging
Contrast section ratio K2；
Attitude of stratum is when being tilted for horizontal well path updip, adjacent drilling straight-hole passes through the depth h on stratum to bore level with positive
Well differs Δ h through the vertical depth H on stratum, there is the relation of formula (2) between H and h, i.e., when positive horizontal well drilling is entered with β angles
When inclination angle is α stratum, the vertical depth through stratum passes through the ratio of depth of stratum with adjacent drilling straight-hole, if this ratio
For λ；
<mrow>
<mi>&lambda;</mi>
<mo>=</mo>
<mfrac>
<mi>H</mi>
<mi>h</mi>
</mfrac>
<mo>=</mo>
<mfrac>
<mn>1</mn>
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<mn>1</mn>
<mo>+</mo>
<mi>t</mi>
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</mrow>
</mfrac>
<mo>...</mo>
<mrow>
<mo>(</mo>
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λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (2)1Again divided by λ calculates a positive drilling well well logging
Contrast section ratio K2；
Step 5：In the positive drilling well well logging contrast section ratio K2Print being corrected into after vertical depth for positive horizontal well drilling drilling tracking
Well logging contrast section, and be K with ratio1The adjacent borehole logging tool of drill straight contrast section contrasted, according to comparing result and just
Horizontal well drilling original design is contrasted, so as to control the hole angle into window.
2. a kind of horizontal well as claimed in claim 1 enters the non-equal proportion Strata Comparison method before window, it is characterised in that：It is described
The hole angle method into window that controls be：When judging to be more than positive horizontal well drilling original design distance into window distance, level is bored with positive
Well original design is crept into compared to hole angle is reduced；When judging to be less than positive horizontal well drilling original design distance into window distance, with positive brill
Horizontal well original design is compared to increase hole angle drilling；It is consistent with positive horizontal well drilling original design distance into window distance when judging
When, continue to creep into according to positive horizontal well drilling original design.
3. a kind of horizontal well enters the non-equal proportion Strata Comparison device before window, it is characterised in that including：
Collection module, for collecting the adjacent borehole logging tool of drill straight contrast section, positive horizontal well drilling well logging data, hole deviation data
With stratigraphic dip data；
Computing module, for the data collected according to collection module, calculates positive drilling well well logging contrast section ratio；
Comparison module, for printing being corrected into for positive horizontal well drilling drilling tracking in described positive drilling well well logging contrast section ratio
Well logging contrast section after vertical depth, is contrasted with the adjacent borehole logging tool of drill straight contrast section, and water is bored with positive according to comparing result
Horizontal well original design is contrasted, so as to control into window hole angle；
The collection module is further used for collecting the adjacent borehole logging tool of drill straight contrast section, and the adjacent borehole logging tool of drill straight contrast is cutd open
Face ratio is K1；Positive horizontal well drilling well logging data are collected, hole deviation data, the hole angle that can read any position is β；Receive
Collect stratigraphic dip α, and judge pendage type；
It is that positive horizontal well drilling passes through ground when having a down dip to tilt for horizontal well path that the computing module, which is further used for attitude of stratum,
The vertical depth H of layer differs △ h with adjacent drilling straight-hole through the depth h on stratum, the relation that there is formula (1) between H and h, i.e.,
When positive horizontal well drilling enters inclination angle as α stratum using β angles, vertical depth and adjacent drilling straight-hole through stratum pass through stratum
The ratio of depth, if this ratio is λ；
<mrow>
<mi>&lambda;</mi>
<mo>=</mo>
<mfrac>
<mi>H</mi>
<mi>h</mi>
</mfrac>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mrow>
<mn>1</mn>
<mo>-</mo>
<mi>t</mi>
<mi>g</mi>
<mi>&alpha;</mi>
<mi>t</mi>
<mi>g</mi>
<mi>&beta;</mi>
</mrow>
</mfrac>
<mo>...</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (1)1Again divided by λ calculates a positive drilling well well logging
Contrast section ratio K2；
Attitude of stratum is when being tilted for horizontal well path updip, adjacent drilling straight-hole passes through the depth h on stratum to bore level with positive
Well differs △ h through the vertical depth H on stratum, there is the relation of formula (2) between H and h, i.e., when positive horizontal well drilling is entered with β angles
When inclination angle is α stratum, the vertical depth through stratum passes through the ratio of depth of stratum with adjacent drilling straight-hole, if this ratio
For λ；
<mrow>
<mi>&lambda;</mi>
<mo>=</mo>
<mfrac>
<mi>H</mi>
<mi>h</mi>
</mfrac>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mrow>
<mn>1</mn>
<mo>+</mo>
<mi>t</mi>
<mi>g</mi>
<mi>&alpha;</mi>
<mi>t</mi>
<mi>g</mi>
<mi>&beta;</mi>
</mrow>
</mfrac>
<mo>...</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
</mrow>
λ, the adjacent borehole logging tool of drill straight contrast section ratio K are calculated according to formula (2)1Again divided by λ calculates a positive drilling well well logging
Contrast section ratio K2；
The comparison module is further used in the positive drilling well well logging contrast section ratio K2Print positive horizontal well drilling drilling tracking
Be corrected into after vertical depth well logging contrast section, and with ratio be K1The adjacent borehole logging tool of drill straight contrast section contrasted,
Contrasted according to comparing result with positive horizontal well drilling original design, so as to control the hole angle into window.
4. a kind of horizontal well as claimed in claim 3 enters the non-equal proportion Strata Comparison device before window, it is characterised in that described
Comparison module be further used for when judge into window distance be more than positive horizontal well drilling original design distance, it is original with positive horizontal well drilling
Design is crept into compared to hole angle is reduced；When judging to be less than positive horizontal well drilling original design distance into window distance, with positive horizontal well drilling
Original design is compared to increase hole angle drilling；When judge into window distance and positive horizontal well drilling original design apart from it is consistent when, according to
Positive horizontal well drilling original design continues to creep into.
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| CN106324698B (en) * | 2015-06-30 | 2018-09-11 | 中国石油化工股份有限公司 | Strata Comparison method and system for oil-gas bearing basin |
| CN106869792B (en) * | 2017-04-14 | 2018-10-19 | 中国石油集团渤海钻探工程有限公司 | Coal bed gas horizontal well horizontal segment selects the method for chasing after layer or sidetracking after going out layer |
| CN113700470B (en) * | 2021-06-18 | 2024-05-24 | 中国石油化工股份有限公司 | Correction method for logging data of directional well |
| CN115142837B (en) * | 2022-07-08 | 2024-05-14 | 陕西延长石油（集团）有限责任公司 | Track design method for horizontal well vector windowing |
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| US7191850B2 (en) * | 2004-10-28 | 2007-03-20 | Williams Danny T | Formation dip geo-steering method |
| US7925442B2 (en) * | 2008-10-14 | 2011-04-12 | Chevron U.S.A. Inc. | Pseudo logs to improve stratigraphic correlation between sedimentary basins |
| CN102996114A (en) * | 2011-09-14 | 2013-03-27 | 王维 | Inclined hole correction method of logging information |
| CN102392601B (en) * | 2011-10-09 | 2013-11-27 | 中国石油化工股份有限公司 | Method for determining hole trajectory of multi-target horizontal well |
| CN102518433B (en) * | 2011-12-31 | 2015-07-08 | 中国石油天然气股份有限公司 | Target point adjusting method for horizontal well of thin carbonate reservoir |
| CN102635347B (en) * | 2012-03-30 | 2014-12-10 | 中国电子科技集团公司第二十二研究所 | Method for quantitatively enabling thin interbed to be equivalent to formation with horizontal and vertical resistivities |
| CN103883311A (en) * | 2013-03-22 | 2014-06-25 | 中国石油化工股份有限公司 | Composite oriented drilling target-entering situation prediction method |
| CN103790577B (en) * | 2013-07-23 | 2016-08-10 | 中国石油化工股份有限公司 | Depth Domain based on the virtual straight well of horizontal well horizontal segment constraint inversion method |
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