CN107288546B - A kind of completion method and horizontal well of horizontal well - Google Patents
A kind of completion method and horizontal well of horizontal well Download PDFInfo
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- CN107288546B CN107288546B CN201710703381.3A CN201710703381A CN107288546B CN 107288546 B CN107288546 B CN 107288546B CN 201710703381 A CN201710703381 A CN 201710703381A CN 107288546 B CN107288546 B CN 107288546B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005553 drilling Methods 0.000 claims description 68
- 238000004891 communication Methods 0.000 claims description 34
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000001351 cycling effect Effects 0.000 claims 1
- 238000005065 mining Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 239000003245 coal Substances 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000007405 data analysis Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
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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
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Abstract
The invention discloses the completion method of a kind of horizontal well and horizontal well, wherein for the step 1) of the completion method of horizontal well for realizing the connection of horizontal well and producing well, step 2) is used to verify horizontal well and is connected to the bias of producing well whether meet the requirements.The horizontal segment of horizontal well deviates the axis certain distance of producing well, PE screen casing in horizontal segment also can deviate from axis a certain distance of producing well, the space in the producing well middle position that PE screen casing occupies reduces, decentralization space is provided for the tubing string in tripping in producing well, tubing string in producing well is transferred to predetermined depth, guarantees going on smoothly for mining operation.After the completion of horizontal well is connected to producing well bias, the bias for needing to verify horizontal well and producing well be connected to whether meet the requirements, horizontal well and producing well be connected to it is satisfactory mean to can satisfy the PE screen casing in horizontal segment at a distance from horizontal well deviation producing well axis and do not influence the tubing string in producing well transfer to predetermined depth.
Description
Technical Field
The invention relates to the technical field of coal bed gas, in particular to a well completion method of a horizontal well and the horizontal well.
Background
For a multi-branch horizontal well for exploiting coal bed gas, the horizontal well is communicated with a production well, the diameter of the production well is only 0.5 meter, the distance between the two wells is at least 200 meters, and the two wells can be communicated by means of a special communicating instrument. In the prior art, the communication between the horizontal section of the horizontal well and the production well is generally drilled towards the axial direction of the production well, and the communication between the horizontal well and the production well is ensured.
After the horizontal well is communicated with the production well, the PE sieve tube can be put into the horizontal well, the tubular column can also be put into the production well, and the PE sieve tube occupies partial space of the production well, so that the position interference between the tubular column put into the production well and the PE sieve tube is caused, the tubular column of the production well cannot be put into a preset position, and the carrying out of the drainage and mining operation is seriously influenced.
Therefore, how to solve the problem of position interference between the PE screen of the horizontal well and the pipe column of the production well becomes a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the invention provides a well completion method for a horizontal well, which aims to solve the problem of position interference between a PE screen pipe of the horizontal well and a pipe column of a production well. The invention also provides a horizontal well.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of completing a horizontal well, comprising:
step 1) eccentrically communicating a horizontal section of a horizontal well with a production well;
and 2) verifying whether the eccentric communication between the horizontal well and the production well meets the requirement or not, if the distance of the horizontal well deviating from the axis of the production well meets the requirement, entering guiding operation, and if the distance of the horizontal well deviating from the axis of the production well does not meet the requirement, repeating the step 1) and the step 2).
Preferably, in the method for completing a horizontal well, the step 1) includes:
step 11) controlling a drilling tool to drill into a vertical section of the horizontal well and controlling the drilling tool to drill into a first horizontal section of a horizontal section of the horizontal well just opposite to a target point;
step 12) controlling the drilling tool to drill a second horizontal section of the horizontal section towards a direction deviating from the preset distance of the target point;
and step 13) controlling the drilling tool to drill a third horizontal section of the horizontal section, wherein the third horizontal section is eccentrically communicated with the production well, and the eccentric communication position of the third horizontal section and the production well is a communication point.
Preferably, in the method for completing a horizontal well, the step 2) includes:
step 21) tripping the drilling tool to a casing shoe of the horizontal well;
step 22) running a string into the production well to the end of the production well;
step 23) lowering the drilling tool along the horizontal well, observing the change of the hanging weight, lowering the drilling tool to the connection point if the hanging weight is stable, lifting the drilling tool if the hanging weight is increased or decreased, lifting the drilling tool and the tubular column string of the production well to a preset height simultaneously, then lowering the drilling tool to the connection point, lowering the tubular column string of the production well, determining the encountering resistance position of the tubular column string, verifying whether the eccentric distance between the encountering resistance position and the axis of the production well meets the requirement, entering guiding operation if the eccentric distance meets the requirement, and repeating the step 1) and the step 2) if the eccentric distance does not meet the requirement.
Preferably, in the method for completing a horizontal well, the step 21) further comprises a step 20) of opening a pump circulation back reaming hole before the step 21).
Preferably, in the method for completing a horizontal well, the step 11) and the step 12) are performed by prohibiting the drill tool from being lifted up.
The horizontal well is opened by adopting the well completion method of the horizontal well in any scheme.
According to the technical scheme, the horizontal well completion method provided by the invention comprises the steps 1) and 2), wherein the step 1) is used for realizing the communication between the horizontal well and the production well, and the step 2) is used for verifying whether the eccentric communication between the horizontal well and the production well meets the requirement. The horizontal section of horizontal well is skew the axis certain distance of producing the well, and the PE screen pipe in the horizontal section just also can be skew the axis certain distance of producing the well, and the space of the producing well intermediate position that the PE screen pipe occupy has reduced, provides for the tubular column of putting into in the producing well and has transferred the space for tubular column in the producing well can be transferred to the degree of depth of predetermineeing, guarantees going on smoothly of row's adopting operation. After the horizontal well and the production well are communicated eccentrically, whether the eccentric communication between the horizontal well and the production well meets the requirement needs to be verified, and the fact that the communication between the horizontal well and the production well meets the requirement means that the distance of the horizontal well deviating from the axis of the production well can meet the requirement that a PE sieve tube in a horizontal section does not influence the lowering of a pipe column in the production well to the preset depth can be guaranteed, so that the smooth implementation of the drainage and production effect can be guaranteed.
The invention also provides a horizontal well which is opened by adopting the well completion method of the horizontal well recorded in any one of the schemes. Because the well completion method of the horizontal well has the technical effects, the horizontal well formed by the well completion method of the horizontal well also has the same technical effects, and the details are not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flow chart of a method for completing a horizontal well according to a first embodiment of the present invention;
FIG. 2 is a flow diagram of a method for completing a horizontal well according to a second embodiment of the present invention;
fig. 3 is a flow chart of a method for completing a horizontal well according to a third embodiment of the present invention.
Detailed Description
The invention discloses a well completion method of a horizontal well, which aims to solve the problem of position interference between a PE sieve tube of the horizontal well and a pipe column of a production well. The invention also discloses a horizontal well.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1 to 3, fig. 1 is a flow chart illustrating a method for completing a horizontal well according to a first embodiment of the present invention; FIG. 2 is a flow diagram of a method for completing a horizontal well according to a second embodiment of the present invention; fig. 3 is a flow chart of a method for completing a horizontal well according to a third embodiment of the present invention.
The invention discloses a well completion method of a horizontal well, which comprises the following steps:
step 1) eccentrically communicating a horizontal section of a horizontal well with a production well;
and 2) verifying whether the eccentric communication between the horizontal well and the production well meets the requirement or not, if so, performing guiding operation, otherwise, repeating the steps 1) and 2).
The horizontal section of the horizontal well is eccentrically communicated with the production well, and the eccentric communication means that the horizontal section of the horizontal well deviates from the axis of the production well, the axis of the horizontal section does not intersect with the axis of the production well, and a certain distance exists between the axis of the horizontal section and the axis of the production well in the horizontal direction.
The horizontal section of horizontal well is skew the axis certain distance of producing the well, and the PE screen pipe in the horizontal section just also can be skew the axis certain distance of producing the well, and the space of the producing well intermediate position that the PE screen pipe occupy has reduced, provides for the tubular column of putting into in the producing well and has transferred the space for tubular column in the producing well can be transferred to the degree of depth of predetermineeing, guarantees going on smoothly of row's adopting operation.
After the horizontal well and the production well are communicated eccentrically, whether the eccentric communication between the horizontal well and the production well meets the requirement needs to be verified, and the fact that the communication between the horizontal well and the production well meets the requirement means that the distance of the horizontal well deviating from the axis of the production well can meet the requirement that a PE sieve tube in a horizontal section does not influence the lowering of a pipe column in the production well to a preset depth, and the smooth implementation of a drainage and production effect can be guaranteed.
The distance requirement of the horizontal well from the axis of the production well is as follows: the distance of the horizontal well from the axis of the production well is at least the sum of the radius of the pipe column and the radius of the PE sieve pipe.
If the distance of the horizontal well deviating from the axis of the production well meets the production requirement, the horizontal well enters a guiding function; and if the distance of the horizontal well deviated from the axis of the production well does not meet the production requirement, repeating the step 1) and the step 2), namely repeating the eccentric communication and verifying whether the eccentric communication meets the requirement. Normal coal bed gas production can be performed only when the horizontal well deviates from the axis of the production well by a distance that meets the production requirements, otherwise, the efficiency and yield of coal bed gas production can be reduced.
In a specific embodiment of the present disclosure, step 1) specifically includes:
step 11) controlling a drilling tool to drill a vertical section of the horizontal well and controlling the drilling tool to drill a first horizontal section of a horizontal section of the horizontal well right facing a target point;
step 12) controlling the drilling tool to drill a second horizontal section of the horizontal section towards the direction deviating from the preset distance of the target point;
and step 13) controlling the drilling tool to drill a third horizontal section of the horizontal section, wherein the third horizontal section is eccentrically communicated with the production well, and the position where the third horizontal section is eccentrically communicated with the production well is a communication point.
Step 1) is used for realizing the communication between the horizontal well and the production well, and the specific communication steps comprise step 11) to step 13).
And step 11) drilling the vertical section and the first horizontal section of the horizontal well and drilling the production well. During the drilling of the first horizontal section, the drilling tool is required to drill against the target point. In order to facilitate understanding of the underground drilling condition on the well, preferably, a strong magnetic joint is connected between a drill bit of the drilling tool and the screw, a probe is arranged at the depth of a target point in the production well, the strong magnetic joint is used for providing an alternating magnetic field to be detected, the maximum effective distance of an electromagnetic signal is 40-70m, the probe is used for collecting a magnetic field intensity signal generated by the strong magnetic joint, the signal collected by the probe is transmitted to ground data collection software and data analysis software after being processed, and the direction and the distance of the track of the well of the horizontal well relative to the target point of the production well are obtained.
The drilling tool running-in depth, the distance interval between two adjacent data acquisitions and the initial well depth of the horizontal well are input into data acquisition software, the acquired data are generally analyzed once every 3m through data analysis software, and in a specific embodiment of the scheme, the distance interval between two adjacent data acquisitions is half a meter.
During data acquisition, the data receiving software continuously receives the magnetic field strength values (Hx, Hy and Hz) of the strong magnetic joint, and the data analysis software generates three signal curves related to the magnetic field strength values, wherein it needs to be stated that no breakpoint exists in the three signal curves, data acquisition is stopped when an error occurs, data is acquired again, and data analysis is redone.
In a specific embodiment of the scheme, when the distance between a detection point of a communicating instrument and a casing shoe is less than 8m when the communicating operation is started, the measured azimuth of the horizontal well borehole trajectory relative to a target point of a production well is greatly influenced by magnetic interference of the casing, the measured data cannot be used as a main basis for the communicating operation at the moment, after several groups of communicating data are obtained subsequently, the reasonability and the accuracy of the data at the start of the communicating operation are judged and verified by combining the position of a tool face during drilling, the slope of a screw rod and the like, and then whether the data are used as a basis for final data analysis is determined.
And step 12) drilling a second horizontal section of the horizontal well, wherein the drilling of the second horizontal section needs to deviate from the target point step by step for drilling, and after the drilling of the second horizontal section is finished, the tail end of the second horizontal section deviates from the target point by a preset distance. The second horizontal segment effects a deviation of the horizontal well relative to the production well.
In a specific embodiment of the scheme, in the early stage of the communication operation, a first horizontal section is drilled just facing a target point, the length of the first horizontal section is 12m, then a second horizontal section is drilled, the second horizontal section deviates from the target point to carry out communication operation, at least two groups of data of the orientation and the distance of the second horizontal section relative to the target point of a production well are analyzed before a vertical well starts a communication instrument, the distance of a drill bit deviating from the target point is controlled to be 15cm, and the orientation adjustment is not carried out when the distance of the last group of analysis data deviating from the target point is calculated to be within 15 cm.
When the vertical depth of the target point is determined, the vertical depth of the target needs to be controlled by combining the actual position of the drill head of the drilling tool on the coal seam.
When the drilling tool drills to a position 5m away from the connection point, namely the length of the third horizontal section is 5m, the drilling tool is informed to be lifted, a communication engineer and a directional engineer check the bottom hole data and the track data, the drilling mode of the last 5m is determined, and at the moment, the horizontal well and other vertical wells are lifted out of the connection instrument. If the drilling position of the horizontal well needs to be adjusted, a directional drilling mode is adopted, and if the drilling position of the horizontal well does not need to be adjusted, a rotary drilling mode is adopted.
In the step 11) and the step 12), the information acquired by the data acquisition software needs to be analyzed, and the directional well engineer predicts the well deviation, the azimuth, the vertical depth, the north-south coordinates and the east-west coordinates of the drill bit position of the horizontal well according to the information acquired by the data acquisition software and provides the information to a communication engineer;
communicating information collected by the engineer through the data collection software and analyzing the data as predicted by the directional engineer, the given provides the well engineer with the following data: the distance between the drill bit and the probe, the difference value of the azimuth angles of the bottom hole to the target, new north and south coordinates of the target point, new east and west coordinates of the target point and new vertical depth of the target point;
the directional well engineer determines the drilling measure of the third horizontal section according to the data provided by the communication engineer, the accuracy of the data provided by the communication instrument (the communication instrument comprises a downhole part and an uphole part, the downhole part mainly comprises a strong magnetic joint and a probe, and the uphole part comprises data acquisition software and data analysis software) is directly influenced by the accuracy of the drill bit position well deviation, the azimuth, the vertical depth, the south-north coordinates and the east-west coordinates of the horizontal well predicted by the directional well engineer, and the directional well engineer needs to predict the well bottom azimuth as accurately as possible according to the information acquired by the latest data acquisition software.
In a specific embodiment of the present solution, step 2) includes:
step 21) tripping the drilling tool to a casing shoe of the horizontal well;
step 22) putting a pipe string into the production well and stringing the pipe string to the tail end of the production well;
step 23) lowering the drilling tool along the horizontal well, observing the change of the hanging weight, if the hanging weight is stable, lowering the drilling tool to a communication point, if the hanging weight is increased or decreased, lifting the drilling tool, lifting the pipe column string of the production well to a preset height, then lowering the drilling tool to the communication point, lowering the pipe column string of the production well, determining the encountering position of the pipe column string, verifying whether the eccentricity between the encountering position and the axis of the production well meets the requirement, if the eccentricity meets the requirement, entering guiding operation, and if the eccentricity does not meet the requirement, repeating the steps 1) and 2).
Step 21) can protect the drilling tool and prevent the drilling tool from being stuck. Because the time of lowering the string of the pipe column in the production well is longer, the drilling tool can be protected by lifting the drilling tool to the casing shoe, and the working safety of the drilling tool is improved.
Step 2) is used for verifying whether the eccentric communication between the horizontal well and the production well meets the requirement or not, and specifically comprises steps 21) to 23).
Step 21) and step 22) may be performed simultaneously.
Step 21) further comprises a step 20) of opening a pump to circulate and back-cut the hole before the step 21), so that the drilling tool is conveniently lifted, and the drill rod is prevented from being broken in the lifting process of the drilling tool.
And step 11) and step 12) forbidding pulling the drilling tool, avoiding signal acquisition interruption caused by pulling the drilling tool, and requiring the drilling tool to be continuously and uniformly lowered when collecting signals.
During the communication operation, if the first horizontal section and the second horizontal section of the horizontal well are required to be lifted in normal drilling and the situation that a drilling tool needs to be lifted is not required to be specified, a communication engineer needs to be informed in advance when the drilling tool needs to be lifted.
If the first horizontal section and the second horizontal section of the horizontal well need to be lifted to perform data analysis during normal drilling, a communication engineer needs to inform a directional well engineer, and the directional well engineer gives instructions to determine that the drilling tool is lifted to the required well depth.
The invention also provides a horizontal well which is opened by adopting the well completion method of the horizontal well recorded in any one of the schemes. Because the well completion method of the horizontal well has the technical effects, the horizontal well formed by the well completion method of the horizontal well also has the same technical effects, and the details are not repeated herein.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A method of completing a horizontal well, comprising:
step 1) eccentrically communicating a horizontal section of a horizontal well with a production well;
step 2) verifying whether the eccentric communication between the horizontal well and the production well meets the requirement or not, if the distance of the horizontal well deviating from the axis of the production well meets the requirement, entering guiding operation, and if the distance of the horizontal well deviating from the axis of the production well does not meet the requirement, repeating the step 1) and the step 2);
wherein,
the distance requirement of the horizontal well deviating from the axis of the production well is as follows: the distance of the horizontal well deviating from the axis of the production well is at least the sum of the radius of the pipe column and the radius of the PE sieve pipe;
the step 1) comprises the following steps:
step 11) controlling a drilling tool to drill into a vertical section of the horizontal well and controlling the drilling tool to drill into a first horizontal section of a horizontal section of the horizontal well just opposite to a target point;
step 12) controlling the drilling tool to drill a second horizontal section of the horizontal section towards the direction deviating from the target point by a preset distance, wherein the second horizontal section gradually deviates from the target point in the drilling process, and after the drilling of the second horizontal section is finished, the distance of the tail end of the second horizontal section deviating from the target point reaches the preset distance;
step 13) controlling the drilling tool to drill a third horizontal section of the horizontal section, wherein the third horizontal section is eccentrically communicated with the production well, and the position where the third horizontal section is eccentrically communicated with the production well is a communication point;
the step 2) comprises the following steps:
step 21) tripping the drilling tool to a casing shoe of the horizontal well;
step 22) running a string into the production well to the end of the production well;
step 23) lowering the drilling tool along the horizontal well, observing the change of the hanging weight, lowering the drilling tool to the connection point if the hanging weight is stable, lifting the drilling tool if the hanging weight is increased or decreased, lifting the drilling tool and the tubular column string of the production well to a preset height simultaneously, then lowering the drilling tool to the connection point, lowering the tubular column string of the production well, determining the encountering resistance position of the tubular column string, verifying whether the eccentric distance between the encountering resistance position and the axis of the production well meets the requirement, entering guiding operation if the eccentric distance meets the requirement, and repeating the step 1) and the step 2) if the eccentric distance does not meet the requirement.
2. A method of completing a horizontal well according to claim 1 wherein step 21) further comprises step 20) of pump cycling back reaming prior to step 21).
3. A method for completing a horizontal well according to claim 1, wherein the raising of the drilling tool is prohibited in step 11) and step 12).
4. A horizontal well, which is characterized in that the horizontal well is opened by adopting the well completion method of the horizontal well in any one of claims 1 to 3.
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| CN108104756A (en) * | 2017-12-15 | 2018-06-01 | 天水电气传动研究所有限责任公司 | A kind of control method of automatic back reaming |
| CN109322618B (en) * | 2018-10-19 | 2020-04-07 | 成都科盛石油科技有限公司 | Method for completing drilling of heterogeneous shale gas well reservoir section |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015169959A2 (en) * | 2014-05-09 | 2015-11-12 | Welltec A/S | Downhole completion system |
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| CN1333858A (en) * | 1998-11-20 | 2002-01-30 | Cdx天然气有限公司 | Method and system for accessing substerranean deposits from the surface |
| CN101975055A (en) * | 2010-09-17 | 2011-02-16 | 北京奥瑞安能源技术开发有限公司 | Method for remediating trouble well of coal bed gas multi-branch horizontal well |
| CN101994505A (en) * | 2010-09-17 | 2011-03-30 | 北京奥瑞安能源技术开发有限公司 | Drilling construction method by cooperation of horizontal wells and extraction straight wells for coal bed methane in multiple objective layers |
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