CN108166927B - It is a kind of for determining the appraisal procedure of horizontal well construction mode - Google Patents
It is a kind of for determining the appraisal procedure of horizontal well construction mode Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title abstract description 10
- 238000011156 evaluation Methods 0.000 claims description 14
- 238000012937 correction Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 description 26
- 239000003921 oil Substances 0.000 description 11
- 239000012530 fluid Substances 0.000 description 9
- 229910003460 diamond Inorganic materials 0.000 description 6
- 239000010432 diamond Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 239000009096 changqing Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000013519 translation Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- E21B7/046—Directional drilling horizontal drilling
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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
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
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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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- 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
- E21B7/10—Correction of deflected boreholes
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Abstract
The present invention relates to a kind of for determining the appraisal procedure of horizontal well construction mode, comprising the following steps: Step 1: obtaining horizontal well relevant parameter, relevant parameter includes k1、O、D、k2、L1、L2、L3、L4、μ、mg、α1、α2、α3、α4、G1、G2、G3、G4；Step 2: obtaining horizontal well construction degree-of-difficulty factor according to relevant parameter, wherein
Description
Technical Field
The invention relates to the field of drilling engineering in drilling of oil and natural gas horizontal wells, in particular to an evaluation method for judging a horizontal well construction mode.
Background
The horizontal well is communicated with a well section with relatively good permeability in a well hole with the length of hundreds of meters in a reservoir, the probability of crude oil and natural gas flowing into the well hole is increased, staged fracturing and blockage removal can be planned, and the horizontal well becomes an effective way for developing low-permeability oil and gas reservoirs and old oil and gas reservoirs. According to the development requirement of petroleum and natural gas, horizontal wells are developed from two-dimensional horizontal wells to three-dimensional horizontal wells, multi-branch horizontal wells and other special process wells. Along with the development of the three-dimensional horizontal well and the multi-branch horizontal well, the construction difficulty of the horizontal well is increased. In the prior art, the evaluation of the construction difficulty of the horizontal well is only difficult or simple in qualitative mode, and a method for comprehensively evaluating the construction difficulty of the horizontal well and a corresponding construction method do not exist. Therefore, certain waste of material resources, financial resources and manpower is caused to construction units; for wells with too high construction difficulty, an oil field company does not evaluate the comprehensive difficulty in the early construction period, and equipment and the prior art cannot meet the construction requirements or the prior art cannot achieve the development purpose, so that the development plan cannot be completed as required.
Disclosure of Invention
In order to solve the problems, the invention provides an evaluation method for judging the construction mode of a horizontal well, which can comprehensively evaluate the construction difficulty of special process wells such as the horizontal well, a branch horizontal well and the like and adopt an adaptive construction method according to the evaluation result, so that an oil field company can complete a development plan on time.
The technical scheme of the invention is as follows: an evaluation method for judging a construction mode of a horizontal well comprises the following steps:
step one, obtaining relevant parameters of the horizontal well, wherein the relevant parameters comprise k1、O、D、k2、L1、L2、L3、L4、μ、mg、α1、α2、α3、α4、G1、G2、G3、G4，
Wherein k is1For actual dog leg degree of the inclination-increasing section, O is the offset distance, D is the vertical depth increment of the inclination-stabilizing deviation-correcting section, k2Is the actual dog leg degree of the torsional azimuth section, L1Length of straight well, L2For length of the correction segment, L3To increase the length of the ramp section, L4For horizontal section length, μ is the tool-to-borehole wall friction coefficient, mg is tool gravity, α1For vertical well section angle of inclination, α2To correct for section skew angle, α3For increasing slant angle of deviated section, α4Is horizontal section angle of inclination, G1Is the suspended weight of a vertical shaft section G2Suspended weight of the correction section, G3To increase the suspended weight of the ramp section, G4Is the hanging weight of the horizontal section;
step two, obtaining a horizontal well construction difficulty coefficient according to the relevant parameters,
wherein,
wherein K is the construction difficulty coefficient of the horizontal well, K'1For the maximum dog-leg degree of the oblique-increasing section,in order to make the friction resistance be good,is suspended weight, k'2Maximum dogleg degree of torsional azimuth segment, a1Is a first weight, a2Is a second weight;
step three, determining a horizontal well construction method according to the horizontal well construction difficulty coefficient,
when K is more than or equal to 0 and less than or equal to 0.3, the construction difficulty is simple, a simple construction method is adopted,
when K is more than 0.3 and less than or equal to 0.6, the construction difficulty is moderate, a common construction method is adopted,
when K is more than 0.6 and less than or equal to 1, the construction difficulty is complex, and a complex construction method is adopted.
A is a1＝0.3，a2＝0.2。
K is1’＝20。
K is2’＝20。
The above-mentioned
The above-mentioned
The invention has the beneficial effects that: by using the evaluation method, each parameter in the horizontal well is used as a calculation item, comparison is carried out according to the characteristic and the limiting value of each parameter, then weight distribution is carried out on each ratio in combination with site construction, before engineering deployment and construction, the construction difficulty of each horizontal well is comprehensively evaluated, and the construction method is selected, so that equipment and materials are reasonably allocated, the development risk of an oil field company is reduced, the economic loss of a construction unit is reduced, and the economic benefits of the oil field company and the construction unit are maximized.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
an evaluation method for judging a construction mode of a horizontal well comprises the following steps:
step one, obtaining relevant parameters of the horizontal well, wherein the relevant parameters comprise k1、O、D、k2、L1、L2、L3、L4、μ、mg、α1、α2、α3、α4、G1、G2、G3、G4，
Wherein k is1For actual dog leg degree of the inclination-increasing section, O is the offset distance, D is the vertical depth increment of the inclination-stabilizing deviation-correcting section, k2Is the actual dog leg degree of the torsional azimuth section, L1Length of straight well, L2For length of the correction segment, L3To increase the length of the ramp section, L4For horizontal section length, μ is the tool-to-borehole wall friction coefficient, mg is tool gravity, α1For vertical well section angle of inclination, α2To correct for section skew angle, α3For increasing slant angle of deviated section, α4Is horizontal section angle of inclination, G1Is the suspended weight of a vertical shaft section G2Suspended weight of the correction section, G3To increase the suspended weight of the ramp section, G4Is the hanging weight of the horizontal section;
step two, obtaining a horizontal well construction difficulty coefficient according to the relevant parameters,
wherein,
wherein K is the construction difficulty coefficient of the horizontal well, K'1For the maximum dog-leg degree of the oblique-increasing section,in order to make the friction resistance be good,is suspended weight, k'2Maximum dogleg degree of torsional azimuth segment, a1Is a first weight, a2Is a second weight;
step three, determining a horizontal well construction method according to the horizontal well construction difficulty coefficient,
when K is more than or equal to 0 and less than or equal to 0.3, the construction difficulty is simple, a simple construction method is adopted,
when K is more than 0.3 and less than or equal to 0.6, the construction difficulty is moderate, a common construction method is adopted,
when K is more than 0.6 and less than or equal to 1, the construction difficulty is complex, and a complex construction method is adopted.
The influence on the construction of the three-dimensional horizontal well of the Changqing compact gas reservoir mainly comprises four factors:
1. the target fore distance (the influence of the dog leg degree and the build rate on the construction difficulty is reflected);
2. offset distance (the influence of the offset distance on the construction difficulty is reflected by the deflection ratio);
3. total horizontal displacement (the total horizontal displacement is the sum of the absolute values of the offset distance and the apparent translation, and the influence of the total horizontal displacement on the construction difficulty is reflected by friction resistance and hanging weight);
4. the orientation difficulty (the influence of the dogleg degree and the build rate on the construction difficulty) is reflected.
In the construction of the inclined shaft section of the horizontal well for the dense gas reservoir in Changqing, the build-up rate of a single-bending screw rod of 1.5 degrees matched with a PDC drill bit is 30 degrees/100 m (the build-up rate is the full bending angle of a drill hole formed in a unit build-up drilling advancing rule, the dogleg degree is the angle from one point in the well hole to another point, the advancing direction of the well hole changes, the build-up rate is equal to the value of the corresponding dogleg degree, the following encountered conditions are the same, and theoretically, the construction can be carried out as long as the average build-up rate of the inclined shaft section is less than 30 degrees/100 m.
In the construction of the three-dimensional horizontal well, the longer the total horizontal displacement (the sum of the offset distance and the apparent translation), the greater the construction difficulty, when the total displacement reaches a certain value, the frictional resistance of the drilling tool is equal to the hanging weight value of the drilling tool during sliding, the subsequent construction cannot be carried out, and the frictional resistance is in direct proportion to the well offset distance and the apparent translation, so that the frictional resistance value of the well and the hanging weight ratio of the drilling tool are used as one judgment value of the method for comprehensively evaluating the construction difficulty of the horizontal well.
In the three-dimensional horizontal well deviation rectifying construction, after the deviation of a stable deviation well reaches 30 degrees, the deviation rectifying construction difficulty is high, and the construction efficiency is poor, so that the actual deviation ratio and the tg30 degree ratio are used as one judgment value of the method for comprehensively evaluating the horizontal well construction difficulty. The sag in the sag ratio here is the effective sag, i.e.: the vertical depth of the middle target is increased, the first inclination increasing short section is increased, and the second inclination increasing section is increased vertically.
When the three-dimensional horizontal well is constructed in the deviation rectifying and twisting direction, the ratio of the dog leg degree generated in the twisting direction to the average maximum dog leg degree in construction is used as one judgment value of the method for comprehensively evaluating the construction difficulty of the horizontal well, like the deflection increasing section.
By obtaining each parameter value in the construction of the horizontal well, namely the actual dog leg degree (k) of the deflection increasing section1) Offset (O), vertical increment of steady slope (D), friction resistanceSuspended weightAnd calculating a horizontal well construction difficulty coefficient (K), and determining a corresponding construction method according to the difficulty coefficient (K). Wherein K is less than or equal to 1, and the construction degree of difficulty is less when the K value is littleer, and when the K value is bigger, the construction degree of difficulty is bigger, and when K equals 1, the construction degree of difficulty reaches the biggest. According to the long-term practical construction situation, the construction difficulty is divided into three grades, namely simple (when K is more than or equal to 0 and less than or equal to 0.3), medium (when K is more than 0.3 and less than or equal to 0.6) and complex (when K is more than 0.6 and less than or equal to 1), a simple construction method, a general construction method and a complex construction method are correspondingly adopted, and different construction methods correspond to different drilling tool combinations and drilling fluid systems.
By adopting the construction method, each parameter in the horizontal well is used as a calculation item, comparison is carried out according to the characteristics and the limiting value of each parameter, and then weight distribution is carried out on each ratio in combination with site construction. Before engineering deployment and construction, the construction difficulty of each horizontal well is comprehensively evaluated, so that equipment and materials are reasonably allocated, the development risk of an oil field company is reduced, the economic loss of a construction unit is reduced, and the economic benefits of the oil field company and the construction unit are maximized.
Example two:
a is a1＝0.3，a2＝0.2。
K is1’＝20。
K is2’＝20。
The above-mentioned
The above-mentioned
In the construction of the inclined shaft section of the horizontal well of the dense gas reservoir in Changqing, the build-up rate of a PDC drill bit matched with a 1.5-degree single-bending screw is 30 degrees/100 m (the build-up rate is the full bending angle of a drill hole formed in a unit build-up drilling footage, the dogleg degree is the angle from one point in the well hole to another point, the change angle of the advancing direction of the well hole is equal to the numerical value of the corresponding dogleg degree, the following encountered conditions are the same, theoretically, the construction can be carried out as long as the average build-up rate of the inclined shaft section is less than 30 degrees/100 m, but in the actual construction, the construction is influenced by factors such as strata, screws, drill bits, drilling fluid and the like, the actual build-up rate can not reach the theoretical build-up rate, and the continuous sliding drilling of the whole shaft section is unrealistic, so when the average build-up rate of the inclined shaft section reaches 20 degrees/100 m in the actual, the average maximum dog leg degree in construction is 20 degrees/100 m, and the actual increasing rate k of each well is used1And the ratio of 20 is used as one judgment value of the method for comprehensively evaluating the construction difficulty of the horizontal well.
When the three-dimensional horizontal well is constructed in the deviation rectifying and twisting direction, the ratio of the dog-leg degree generated in the twisting direction to the average maximum dog-leg degree (20 degrees/100 m) in construction is used as one judgment value of the method for comprehensively evaluating the construction difficulty of the horizontal well, as in the deflection increasing section.
According to the influence of each parameter on the construction difficulty in the actual construction, carrying out grade quantization weight distribution and determining a first weight (a)1) Is 0.3, second weight (a)2) And the number is 0.2, so that each parameter can more scientifically reflect the construction difficulty.
I.e. according to the formulaAnd calculating the construction difficulty coefficient (K) of the horizontal well.
The simple construction method is that a drill tool combination of a phi 215.9mm diamond compact drill bit, a phi 165mm screw drill tool (1.35 degrees), a phi 165mm back pressure valve, a phi 165mm wireless instrument connector, a phi 165mm non-magnetic drill collar, a phi 165 matched connector, a phi 127mm weighted drill rod and a phi 127mm drill rod is adopted in the inclined shaft section.
In the horizontal section, a drill tool combination of a phi 152.4mm diamond compact drill bit, a phi 127mm screw drill tool (1.0 degrees), a phi 148mm centralizer, a phi 120mm back pressure valve, a phi 127mm wireless instrument connector, a phi 120mm non-magnetic drill collar, a phi 120mm conversion connector, a phi 101.6mm weighted drill rod, a phi 101.6mm weighted drill rod and a phi 101.6mm drill rod is adopted.
The mud system adopts a composite salt drilling fluid system.
The general construction method is that a drill tool combination of a phi 215.9mm diamond compact drill bit, a phi 165mm screw drill tool (1.5 degrees), a phi 165mm back pressure valve, a phi 165mm wireless instrument connector, a phi 165mm non-magnetic drill collar, a phi 165 matched connector, a phi 127mm weighted drill rod and a phi 127mm drill rod is adopted in an inclined shaft section.
In the horizontal section, a drill tool combination of a phi 152.4mm diamond compact drill bit, a phi 127 screw drill (1.25 degrees), a phi 148mm centralizer, a phi 120mm back pressure valve, a phi 127mm wireless instrument connector, a phi 120mm non-magnetic drill collar, a phi 120mm conversion connector, a phi 101.6mm weighted drill rod, a phi 101.6mm weighted drill rod and a phi 101.6mm drill rod is adopted.
The mud system adopts a composite salt drilling fluid system.
The difference between the general construction method and the simple construction method is that a phi 165mm screw drilling tool (1.35 degrees) is changed into a phi 165mm screw drilling tool (1.5 degrees) in an inclined shaft section, and a phi 127mm screw drilling tool (1.0 degrees) is changed into a phi 127 screw drilling tool (1.25 degrees) in a horizontal section.
The complex construction method is that a drilling tool combination of a phi 215.9mm diamond compact bit (or a phi 215.9mm tricone bit) plus a phi 165mm screw drilling tool (1.5 degrees), a phi 165mm back pressure valve, a phi 165mm wireless instrument connector, a phi 165mm non-magnetic drill collar, a phi 165 matched connector, a phi 127mm weighted drilling rod and a phi 127mm drilling rod is adopted in the inclined shaft section.
In the horizontal section, a drill tool combination of a phi 152.4mm diamond compact drill bit (or a phi 215.9mm tricone drill bit), a phi 127 screw drill tool (1.25 degrees), a phi 148mm centralizer, a phi 120mm return pressure valve, a phi 127mm wireless instrument connector, a phi 120mm non-magnetic drill collar, a phi 120mm conversion connector, a phi 101.6mm weighted drill rod, a phi 120mm hydraulic oscillator, a phi 101.6mm drill rod, a phi 101.6mm weighted drill rod and a phi 101.6mm drill rod is adopted.
The mud system adopts a composite salt drilling fluid system or an oil-based drilling fluid system which are matched with each other.
The complicated construction method is different from the common construction method in that a hydraulic oscillator with phi 120mm is added in the horizontal section of the complicated construction method, and a mud system is changed from a composite salt drilling fluid system to a composite salt drilling fluid system or an oil-based drilling fluid system and is used in a matched manner.
It should be noted that the technical solutions in the embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Claims (6)
1. An evaluation method for judging a construction mode of a horizontal well comprises the following steps:
step one, obtaining relevant parameters of the horizontal well, wherein the relevant parameters comprise k1、O、D、k2、L1、L2、L3、L4、μ、mg、α1、α2、α3、α4、G1、G2、G3、G4，
Wherein k is1For increasing actual dogleg degree of slope section, O is offset distance, D is slope stabilizing and correcting sectionVertical depth increment, k2Is the actual dog leg degree of the torsional azimuth section, L1Length of straight well, L2For length of the correction segment, L3To increase the length of the ramp section, L4For horizontal section length, μ is the tool-to-borehole wall friction coefficient, mg is tool gravity, α1For vertical well section angle of inclination, α2To correct for section skew angle, α3For increasing slant angle of deviated section, α4Is horizontal section angle of inclination, G1Is the suspended weight of a vertical shaft section G2Suspended weight of the correction section, G3To increase the suspended weight of the ramp section, G4Is the hanging weight of the horizontal section;
step two, obtaining a horizontal well construction difficulty coefficient according to the relevant parameters,
wherein,
wherein K is the construction difficulty coefficient of the horizontal well, K'1For the maximum dog-leg degree of the oblique-increasing section,in order to make the friction resistance be good,is suspended weight, k'2Maximum dogleg degree of torsional azimuth segment, a1Is a first weight, a2Is a second weight;
step three, determining a horizontal well construction method according to the horizontal well construction difficulty coefficient,
when K is more than or equal to 0 and less than or equal to 0.3, the construction difficulty is simple, a simple construction method is adopted,
when K is more than 0.3 and less than or equal to 0.6, the construction difficulty is moderate, a common construction method is adopted,
when K is more than 0.6 and less than or equal to 1, the construction difficulty is complex, and a complex construction method is adopted.
2. The evaluation method for judging the construction mode of the horizontal well according to claim 1, which is characterized by comprising the following steps of: a is a1＝0.3，a2＝0.2。
3. The evaluation method for judging the construction mode of the horizontal well according to claim 1, which is characterized by comprising the following steps of: k 'to'1＝20。
4. The evaluation method for judging the construction mode of the horizontal well according to claim 1, which is characterized by comprising the following steps of: k 'to'2＝20。
5. The evaluation method for judging the construction mode of the horizontal well according to claim 1, which is characterized by comprising the following steps of: the above-mentioned
6. The evaluation method for judging the construction mode of the horizontal well according to claim 1, which is characterized by comprising the following steps of: the above-mentioned
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| CN114382427A (en) * | 2021-12-31 | 2022-04-22 | 中国石油天然气集团有限公司 | Horizontal well debris bed treatment method and device |
| CN116029528B (en) * | 2023-02-17 | 2024-01-23 | 惠州华厦工程咨询有限公司 | Intelligent management platform for building engineering data information |
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