CN109209353A - Device and method for determining distance and direction between wells in drilling process of oil and gas wells - Google Patents
Device and method for determining distance and direction between wells in drilling process of oil and gas wells Download PDFInfo
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- CN109209353A CN109209353A CN201710534063.9A CN201710534063A CN109209353A CN 109209353 A CN109209353 A CN 109209353A CN 201710534063 A CN201710534063 A CN 201710534063A CN 109209353 A CN109209353 A CN 109209353A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000005553 drilling Methods 0.000 title claims abstract description 40
- 230000008569 process Effects 0.000 title claims abstract description 25
- 230000005284 excitation Effects 0.000 claims abstract description 57
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 45
- 238000012545 processing Methods 0.000 claims abstract description 41
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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
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
- E21B47/092—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes by detecting magnetic anomalies
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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
- E21B47/024—Determining slope or direction of devices in the borehole
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Abstract
The invention discloses a device and a method for determining inter-well distance and direction in the drilling process of an oil-gas well, belonging to the field of oil-gas field exploration and development. The device includes: the device comprises a magnetic field excitation instrument and a matched device, wherein the matched device comprises an MWD instrument and a data processing system; the positive pole of the magnetic field excitation instrument is connected with the first oil-gas well through a lead, and the negative pole of the magnetic field excitation instrument is connected with the sleeve string of the second oil-gas well through a lead; the MWD instrument is positioned in a drill string of the first oil and gas well; the MWD instrument is connected with a data processing system. According to the invention, in the drilling process of the first oil-gas well, direct current is loaded on the casing string of the second oil-gas well through the magnetic field excitation instrument to generate an additional electromagnetic field, so that the MWD instrument can measure the intensity of the electromagnetic field generated by the casing string in advance, the interwell distance and the direction between the first oil-gas well and the second oil-gas well are further determined, and the engineering accident caused by collision due to the fact that the interwell distance between the first oil-gas well and the second oil-gas well is relatively short is avoided.
Description
Technical field
The present invention relates to oilfield prospecting developing field, in particular between a kind of well determining in the drilling process of oil/gas well
The device and method of distance and direction.
Background technique
In oilfield prospecting developing field, the quantity of the oil/gas well to spud in every year all can be more than ten thousand mouthfuls, and most
Oil/gas well be the directional well for having direction and displacement, after the exploitation by many years, lead to domestic each major oil and gas field missile silo
The distribution of net high density.However, in the drilling process of the first oil/gas well, since the height of underground well pattern is distributed, often can
The engineering accident that the casing of drill bit (or centralizer) and the second oil/gas well that the first oil gas well drilling occurs collides, causes casing
Breakage directly results in the second oil/gas well and scraps, wherein the first oil/gas well is the oil/gas well just in drilling well, the second oil/gas well be away from
From the closer production of hydrocarbons well of the first oil/gas well.
For positive drilling well and adjacent casing well anti-collision drillng operation, domestic and international common two kinds of directional well drilling construction prevent from touching
Hit method.One kind is mathematical model, and for trajectory range apart from calculating method, another kind is drilling well underground exception static magnetic analysis method.Before
Nearest space length leads to error amount since the influence factor of survey calculation error is more between person's application software two wells of calculating
It is larger, it is unable to satisfy current safety drilling construction；The latter is abnormal static magnetic analysis method, utilizes MWD measurement while drilling in drill string
Instrument, one specific well section of every brill carry out the measurement of magnetic field exception, and since casing substance containing magnetic is limited, whenever measuring, abnormal casing is quiet
When magnetic field value, the drill bit (or centralizer) of the first oil/gas well and the casing of the second oil/gas well have collided or at a distance of very
Closely, the first oil/gas well not no leeway of adjustment direction, therefore, this method can not fully meet the need of drilling well anti-collision
It wants.
Summary of the invention
In order to solve related technical problem, the embodiment of the invention provides a kind of to determine in the drilling process of oil/gas well
The device and method of inter-well distance and direction.The technical solution is as follows:
In a first aspect, a kind of device that inter-well distance and direction are determined in the drilling process of oil/gas well is provided, it is described
Device includes: magnetic excitation instrument and corollary apparatus, and the corollary apparatus includes measurement while drilling MWD instrument and data processing system, institute
Bunch tube load direct current that can respectively to more mouthfuls of adjacent production of hydrocarbons wells when magnetic excitation instrument refers to and connects direct current is stated,
So that described sleeve pipe string is generated additional electromagnetic field, and stop serially adding load direct current to described sleeve pipe when disconnecting direct current, makes institute
The additional electromagnetic field for stating bunch tube generation disappears, wherein described in the additional electromagnetic field refers to and makes because loading direct current
The electromagnetic field that bunch tube generates；
Wherein, it before oil/gas well spuds in, obtains and the positive multiple adjacent oil gas that bores oil/gas well and may collide
The anti-collision data of producing well, during the oil/gas well spuds in, when the oil/gas well and the multiple adjacent production of hydrocarbons
It, can be by the magnetic excitation instrument in the adjacent oil gas when production of hydrocarbons well of arbitrary neighborhood will collide in well
The bunch tube of producing well loads direct current, detect the additional electromagnetic field of described sleeve pipe string generation, MWD instrument can in advance different
Normal magnetic field strength, so by data processing system determine anti-collision well distance and direction after adjust in time drill bit direction avoid with
Offset well is collided, and when the drill bit of the oil/gas well is far from the adjacent production of hydrocarbons well, disconnects the straight of the magnetic excitation instrument
Galvanic electricity, stopping serially add load direct current to described sleeve pipe, the additional electrical magnetic field of described sleeve pipe string are made to disappear；
The anode of the magnetic excitation instrument is connect with the first oil/gas well by conducting wire, the cathode of the magnetic excitation instrument and the
The bunch tube of two oil/gas wells is connected by conducting wire, to pass through the magnetic excitation in the drilling process of first oil/gas well
Instrument loads high-strength direct galvanic electricity on the bunch tube of second oil/gas well, and the bunch tube of the second oil/gas well is made to generate additional electricity
Magnetic field, first oil/gas well are the oil/gas well to spud in, and second oil/gas well is adjacent with first oil/gas well
Production of hydrocarbons well；
The MWD instrument is located in the drill string of first oil/gas well, to pass through the MWD instrument to the second oil/gas well set
The electromagnetic field generated on pipe string by the direct current of load measures, and obtains anomalous field intensity, the anomalous field intensity,
Refer to the magnetic field strength greater than this area standard geomagnetic field intensity；
The MWD instrument is connect with the data processing system, to be based on the anomalous field intensity, at the data
Reason system determines inter-well distance and direction between first oil/gas well and second oil/gas well.
The magnetic excitation instrument is that A.C. current is become direct current electricity output by frequency conversion using three alternating currents of input；
The high-strength direct galvanic electricity refers to that the current strength of direct current is greater than 40 amperes.
Second aspect provides a kind of method that inter-well distance and direction are determined in the drilling process of oil/gas well, described
Method includes:
When being powered during spudding in first oil/gas well to the magnetic excitation instrument, the magnetic excitation
Instrument loads direct current on the second oil/gas well bunch tube, measure its additional electromagnetic field of generation, MWD instrument can in advance
Abnormal electromagnetic field intensity (MWD investigative range increases to 4-6 meters by original 1-2 meters)；
When the anomalous field intensity that the bunch tube that the MWD instrument gets the second oil/gas well generates, by the abnormal magnetic
Field intensity is sent to the data processing system；
The data processing system receives the anomalous field intensity, and determines first oil based on the anomaly intensity
Inter-well distance and direction between gas well and second oil/gas well.
Optionally, the method for the inter-well distance between the determination first oil/gas well and second oil/gas well can be with
It is:
It is determined by the relationship templates tracing analysis between the anomalous field intensity and inter-well distance of foundation；Specifically, may be used
To determine inter-well distance and the side between the first oil/gas well and the second oil/gas well using insertion from relationship by objective (RBO) template curve
To alternatively, carrying out inverting reduction magnetic source to the corrected Calculation and processing of anomalous field three-component parameter using magnetic orientation anti-collision software
Azimuth-range, so that it is determined that the inter-well distance between the first oil/gas well and the second oil/gas well.
First oil/gas well is the oil/gas well that spudding in, and second oil/gas well is adjacent with first oil/gas well
Production of hydrocarbons well.
The beneficial effect of technical solution provided in an embodiment of the present invention is: in embodiments of the present invention, when magnetic excitation instrument
When energization, the bunch tube connection of the well head, cathode and the second oil/gas well of the anode and the first oil/gas well of magnetic excitation instrument and magnetic field
Current loop is formed between excitation instrument, and then direct current is loaded on the second oil gas casing by magnetic excitation instrument, so that
The electromagnetic field that second oil/gas well bunch tube generates is much larger than the magnetostatic field that the second oil/gas well bunch tube itself generates, in order to MWD
Instrument can be in farther range measurement to the electromagnetic field, and then determines the opposite position between the first oil/gas well and the second oil/gas well
It sets, the direction of advance for adjusting drill bit in time is avoided because the inter-well distance between the first oil/gas well and the second oil/gas well is closer, and is drawn
The engineering accident that cause collision generates.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the first determining inter-well distance and direction in the drilling process of oil/gas well provided in an embodiment of the present invention
Apparatus structure schematic diagram；
Fig. 2 is second provided in an embodiment of the present invention determining inter-well distance and direction in the drilling process of oil/gas well
Apparatus structure schematic diagram；
Fig. 3 is the first determining inter-well distance and direction in the drilling process of oil/gas well provided in an embodiment of the present invention
Method flow diagram；
Fig. 4 is the track of the first oil/gas well of Efficiency in Buildings in Tianjin Area provided in an embodiment of the present invention and the distance relation of the second oil/gas well
Figure；
When Fig. 5 is that Efficiency in Buildings in Tianjin Area petroleum casing pipe provided in an embodiment of the present invention loads 50 amperes direct electricity, the first oil/gas well
All directions anomalous field strength difference and inter-well distance graph of relation.
Appended drawing reference:
1: magnetic excitation instrument；2:MWD instrument；3: data processing system；4: the first oil/gas wells；5: the second oil/gas wells；6: pulse
Generator；7: pressure transmitter；8: third oil/gas well.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of dress that inter-well distance and direction are determined in the drilling process of oil/gas well provided in an embodiment of the present invention
Set structural schematic diagram.Referring to Fig. 1, which includes: magnetic excitation instrument 1 and corollary apparatus, which includes 2 He of MWD instrument
Data processing system 3, magnetic excitation instrument 1, which refers to, can load directly the bunch tube of adjacent production of hydrocarbons well when connection direct current
Galvanic electricity makes the bunch tube generate additional electromagnetic field, and stops loading direct current to the bunch tube when disconnecting direct current, makes this
The additional electromagnetic field that bunch tube generates disappears.
The anode of magnetic excitation instrument 1 is connect with the first oil/gas well 4 by conducting wire, the cathode of magnetic excitation instrument 1 and the second oil
The casing of gas well 5 is connected by conducting wire, in the drilling process of the first oil/gas well 4, by magnetic excitation instrument 1 in the second oil gas
Direct current is loaded on the bunch tube of well 5, so that the bunch tube of the second oil/gas well 5 is generated additional electromagnetic field, the first oil/gas well 4 is positive
In the oil/gas well to spud in, the second oil/gas well 5 is the production of hydrocarbons well adjacent with the first oil/gas well 4.
MWD instrument 2 is located in the drill string of the first oil/gas well 4, with by MWD instrument 2 on the bunch tube of the second oil/gas well 5 because add
The direct current of load and the electromagnetic field generated measures, obtain anomalous field intensity, the anomalous field intensity, which refers to, is greater than this
The magnetic field strength of regional standard geomagnetic field intensity；
MWD instrument 2 is connect with data processing system 3, to be based on the anomalous field intensity, is determined by data processing system 3
Inter-well distance and direction between first oil/gas well 4 and the second oil/gas well 5.
Wherein, before the first oil/gas well 4 spuds in, determining multiple second oil gas that may be collided with the first oil/gas well 4
Well 5, in the first oil/gas well 4 during spudding in, if the first oil/gas well 4 in multiple second oil/gas wells 5 any one second
Oil/gas well 5 may collide, then load high-strength direct galvanic electricity by bunch tube of the magnetic excitation instrument 1 to the second oil/gas well 5, make
The bunch tube of second oil/gas well 5 generates additional electromagnetic field, and MWD instrument can detect abnormal electromagnetic field intensity in advance, pass through
Data processing system determine anti-collision well distance and direction after adjust drill bit direction in time and avoid colliding with offset well, when the first oil gas
When the drill bit of well 4 is far from the second oil/gas well 5, the direct current of magnetic excitation instrument 1 is disconnected, stops the bunch tube to the second oil/gas well 5
Direct current is loaded, the additional electromagnetic field for generating the bunch tube disappears.Continue in drilling process in the first oil/gas well, if again
When may collide with another mouthful of production of hydrocarbons well, aforesaid operations are repeated.
In conclusion in embodiments of the present invention, when magnetic excitation instrument 1 is powered, the anode of magnetic excitation instrument 1, first
Current loop is formed between oil/gas well 4, the bunch tube of the second oil/gas well 5 and the cathode of magnetic excitation instrument 1, and then is swashed by magnetic field
Hair instrument 1 loads high-strength direct galvanic electricity on the bunch tube of the second oil/gas well 5, so that the bunch tube of the second oil/gas well 5 generates electromagnetism
, later, the electromagnetic field that MWD instrument 2 generates the bunch tube of the second oil/gas well 5 measures, and data processing system 3 receives MWD
The anomalous field intensity that instrument 2 obtains, and determined between the first oil/gas well 4 and the second oil/gas well 5 based on the anomalous field intensity
Inter-well distance and direction.Due to loading the direct current on the bunch tube of the second oil/gas well 5, so that the casing of the second oil/gas well 5
The electromagnetic field that string generates is much larger than the magnetostatic field that 5 bunch tube of the second oil/gas well itself generates, in order to which MWD instrument 2 can be surveyed in advance
Measure the exception electromagnetic field, and then determine the inter-well distance between the first oil/gas well 4 and the second oil/gas well 5 and direction, so as to and
When adjust the direction of advance of drill bit, avoid because the inter-well distance between the first oil/gas well 4 and the second oil/gas well 5 is closer, and draw
The engineering accident that cause collision generates.
Wherein, magnetic excitation instrument 1 is connected with external power supply, and the external power supply is three-phase alternating current, passes through magnetic excitation
The alternating current of input is converted to safe direct current and output by rectification module and Voltage stabilizing module in instrument.
Since the direct current that magnetic excitation instrument 1 exports can load on the bunch tube of the second oil/gas well 5, in order to
The electromagnetic field for generating the bunch tube of the second oil/gas well 5 is greater than the magnetostatic field that the bunch tube of the second oil/gas well 5 itself generates, so as to
The exception electromagnetic field can be measured in advance in MWD instrument 2, and the direct current loaded on the second oil/gas well 5 is typically greater than default
The electric current of numerical value, the default value can be empirically arranged in advance, for example, the default value can be 50 amperes of electric current.
In practical applications, in order to guarantee the second oil/gas well 5 in certain depth, the electromagnetism generated by the direct current of load
Field MWD instrument 2 enough can measure in advance, and the direct current exported to the magnetic excitation instrument 1 is needed to be adjusted.In a kind of possibility
Implementation in, which may include voltage knob and resistance knob, by adjusting the voltage knob or the electricity
Knob is hindered, the output electric current of magnetic excitation instrument 1 can be increased or reduce.
For example, to make the output electric current of magnetic excitation instrument 1 become larger, in order to which MWD instrument 2 can measure the second oil gas in advance
The electromagnetic field that well 5 generates can make voltage increase or resistance by adjusting the voltage knob or resistance knob of magnetic excitation instrument 1
Reduce, and then increases the DC current that magnetic excitation instrument 1 exports, to increase the DC current loaded on the second oil/gas well 5, thus
The additional Electromagnetic enhancement for generating the second oil/gas well 5.
As shown in Figure 1, the device can also include impulse generator 6 when MWD instrument 2 transmits signal by mud-pulse
With pressure sensor 7；Impulse generator 6 is located in the first oil/gas well 4, and impulse generator 6 is connect with MWD instrument 2, to obtain
MWD instrument 2 measures obtained anomalous field intensity, is pressure pulse signal by the anomalous field intensity-conversion, and by the pressure arteries and veins
Signal is rushed to be emitted；Pressure sensor 7 is connect with data processing system 3, to detect the pressure pulse of the transmitting of impulse generator 6
Signal, and the pressure pulse signal is sent to data processing system 3, first oil/gas well is determined by data processing system 3
Inter-well distance and direction between second oil/gas well.
Specifically, when data processing system 3 receives the pressure pulse signal of the transmission of pressure sensor 7, data processing
System 3 can be decoded processing to the pressure pulse signal.Wherein, by the pressure pulse signal be decoded processing with
The anomalous field intensity that the electromagnetic field that MWD instrument 2 generates the second oil/gas well 5 measures is obtained, the anomalous field is strong
Difference between degree and this area standard geomagnetic field intensity is determined as anomalous field strength difference, and then the exception by establishing
Relationship templates curve between magnetic field strength difference and inter-well distance is analyzed and is determined between the first oil/gas well 4 and the second oil/gas well 5
Inter-well distance and direction.Wherein, standard geomagnetic field intensity refers to oil/gas well in the standard geomagnetic field intensity in a certain area.
In embodiments of the present invention, data processing system is determining the first oil/gas well 4 and according to the anomalous field intensity
When inter-well distance between two oil/gas wells 5 and direction, anomalous field intensity can also be repaired using magnetic orientation anti-collision software
Positive processing comes inverting reduction magnetic source true bearing and distance, so that it is determined that the well spacing between the first oil/gas well and the second oil/gas well
From and orientation.
In another embodiment, as shown in Fig. 2, the bunch tube of the anode of magnetic excitation instrument 1 and the second oil/gas well 5 passes through and leads
Line connection, the cathode of magnetic excitation instrument 1 are connect with the bunch tube of third oil/gas well 8 by conducting wire, to be existed by magnetic excitation instrument 1
Direct current is loaded on the bunch tube of second oil/gas well 5 and the bunch tube of third oil/gas well 8, so that the bunch tube of the second oil/gas well 5
Electromagnetic field is generated on the bunch tube of third oil/gas well 8.Second oil/gas well 5 and third oil/gas well 8 are adjacent with the first oil/gas well 4
Production of hydrocarbons well, the first oil/gas well 4 is to spud in oil/gas well.
The description of an embodiment as above, in order to avoid the engineering accident generated by collision, MWD instrument 2 can be to the second oil gas
The electromagnetic field of well 5 or third oil/gas well 8 is detected, can be to the abnormal magnetic detected when detecting anomalous field intensity
Field intensity measures, and to obtain anomalous field intensity, and the anomalous field intensity is sent to data processing system 3, data
Processing system 3 is based on anomalous field intensity, determines between the well between the first oil/gas well 4 and the second oil/gas well 5 or third oil/gas well 8
Distance and direction.
Wherein it is determined that inter-well distance and direction between the first oil/gas well 4 and the second oil/gas well 5 or third oil/gas well 8
Method, can be such as foregoing description.
Fig. 3 is a kind of method flow that inter-well distance is determined in the drilling process of oil/gas well provided in an embodiment of the present invention
Figure.Referring to Fig. 3, this method comprises:
Step 301: when being powered during spudding in first oil/gas well to magnetic excitation instrument, magnetic excitation
Instrument loads direct current on the second oil/gas well bunch tube.
In the inter-well distance for determining oil/gas well, since the magnetisable material that the casing of oil/gas well contains is limited, the casing
The magnetic field strength of magnetostatic field is weaker, when MWD measures the abnormal magnetostatic field value of casing generation, the first oil/gas well and the second oil/gas well
At a distance of the drill bit direction and hole angle for relatively closely, being unfavorable for the first oil/gas well of adjustment, therefore, in order to make to determine well spacing
From when, there are enough spaces to be adjusted the drill bit direction of the first oil/gas well, can in the drilling process of the first oil/gas well, lead to
It crosses magnetic excitation instrument and loads direct current on the second oil/gas well, the electromagnetic field intensity for generating the second oil/gas well increases, and makes MWD instrument
Anomalous field intensity can be detected in further distance.
In practical applications, in order to guarantee the second oil/gas well in certain depth, the electromagnetic field of generation is sufficiently strong, in order to
MWD instrument can measure in advance, and the direct current exported to the magnetic excitation instrument is needed to be adjusted.In a kind of possible realization side
In formula, which can be by adjusting voltage knob or adjustment resistance knob to the output direct current of the magnetic excitation instrument
It is adjusted.
Step 302:MWD instrument measures the additional electromagnetic field generated by load direct current, and it is strong to obtain anomalous field
It spends and anomalous field intensity is sent to data processing system.
In order to avoid the engineering accident generated by collision, the electromagnetic field that MWD instrument can generate the second oil/gas well is examined
It surveys, when detecting abnormal electromagnetic field, the electromagnetic field detected can be measured, to obtain anomalous field intensity, and will
The anomalous field intensity is sent to data processing system.
In one possible implementation, when MWD instrument transmits signal by mud-pulse, which further includes pulse
Generator and pressure sensor, at this point, the anomalous field intensity that MWD instrument will acquire is sent to the specific implementation of data processing system
Process can be with are as follows: the anomalous field intensity that the available MWD instrument measurement of impulse generator obtains, by the anomalous field intensity-conversion
For pressure pulse signal, and emitted；It, will when pressure sensor detects the pressure pulse signal of impulse generator transmitting
The pressure pulse signal is sent to data processing system.
Step 303: data processing system receives anomalous field intensity, and determines the first oil gas based on the anomalous field intensity
Inter-well distance and direction between well and the second oil/gas well.
When data processing system receives the anomalous field intensity, using the anomalous field intensity as actual measurement anomalous field
Intensity, and by the difference between the actual measurement anomalous field intensity and this area standard geomagnetic field intensity, it is determined as anomalous field
Strength difference is based on anomalous field strength difference, from the anomalous field strength difference and well spacing of predetermined multiple directions
In relationship templates curve between, the inter-well distance between the first oil/gas well and the second oil/gas well and direction are determined.
Specifically, the first oil/gas well 4 and the second oil/gas well can be determined using insertion from relationship by objective (RBO) template curve
Inter-well distance between 5, it is of course also possible to use magnetic orientation anti-collision software repairs anomalous field strength difference in the related technology
It is positive to calculate and handle, come the inter-well distance between inverting reduction magnetic source orientation and the first oil/gas well and the second oil/gas well, the present invention
Embodiment is not set forth in detail herein.Wherein, magnetic source orientation refers to coordinate parameters of first oil/gas well relative to the second oil/gas well.
In embodiments of the present invention, when the energization of magnetic excitation instrument, the anode of magnetic excitation instrument, the first oil/gas well, the second oil
Current loop is formed between the bunch tube of gas well and the cathode of magnetic excitation instrument, and then by magnetic excitation instrument in the second oil/gas well
Bunch tube on load direct current so that the electromagnetic field that generates of the bunch tube of the second oil/gas well is much larger than the second oil/gas well bunch tube
The magnetostatic field that itself is generated, in order to which MWD instrument can measure the anomalous field intensity in advance, and then determine the first oil/gas well and
Inter-well distance and direction between second oil/gas well, compared with avoiding because of the inter-well distance between the first oil/gas well and the second oil/gas well
Closely, cause the engineering accident generated by collision.
To a kind of method for determining inter-well distance and direction in the drilling process of oil/gas well provided in an embodiment of the present invention
After being explained, in order to make it easy to understand, method provided in an embodiment of the present invention is applied to Efficiency in Buildings in Tianjin Area drilling process
Middle determining inter-well distance and direction.Next, to determining that inter-well distance is illustrated in the Efficiency in Buildings in Tianjin Area drilling process.
As shown in figure 4, A well is the first oil/gas well, the B well second production of hydrocarbons well adjacent with the first oil/gas well is surveyed by MWD
Amount data determine that the measuring point of the first oil/gas well is located at the southwestward of the second oil/gas well bunch tube.In order to determine the first oil/gas well with
Inter-well distance between second oil/gas well can load direct current to the bunch tube of the second oil/gas well, to avoid the first oil gas
The engineering accident that well and the second oil/gas well are generated by collision.
In order to which the electromagnetic field for generating the bunch tube of the second oil/gas well is sufficiently large, in order to which MWD instrument can measure in advance,
The direct current of adjustable magnetic excitation instrument output, makes to load the direct current on the bunch tube of the second oil/gas well and reaches 50 peaces
Training, the electromagnetic field generated using MWD instrument in the bunch tube of the first oil/gas well 5 meters or so the second oil/gas wells of measurement of every drilling, and will
The anomalous field intensity of acquisition is transmitted to data processing system by mud-pulse mode, and data processing system determines the exception magnetic
Difference between field intensity and this area standard geomagnetic field intensity, obtains anomalous field intensity, and then according to the anomalous field
Strength difference determines inter-well distance and direction between the first oil/gas well and the second oil/gas well, as shown in figure 4, in the first oil gas
In the drilling process of well, the first oil/gas well is when well depth is 230 meters, 260 meters, 320 meters, 350 meters and 380 meters of even depth, equal position
In the southwestward of the second oil/gas well.
As shown in figure 5, Efficiency in Buildings in Tianjin Area due east orientation, northeast orientation, southeast orientation, due north can be determined in advance by experience
The relation curve in orientation, due south orientation, southwestern orientation, the anomalous field intensity in northwest position and due west orientation and inter-well distance,
It, can be from pre-determined oil/gas well each side after the direction relations that the first oil/gas well and the second oil/gas well have been determined by MWD instrument
To anomalous field intensity with the corresponding curve of the direction is selected in the graph of relation of inter-well distance, and according to determining exception
Magnetic field strength determines the inter-well distance between the first oil/gas well and the second oil/gas well using insertion from the curve of selection.Cause
This can determine the first oil/gas well by the electromagnetic field exceptional value of southwestward and the relation curve of inter-well distance referring to Fig. 5
With the inter-well distance between the second oil/gas well, to obtain the well depth and corresponding first of the first oil/gas well as shown in table 1 below
The relationship of inter-well distance between oil/gas well and the second oil/gas well.
Table 1
It is calculated between the first oil/gas well and the second oil/gas well referring to table 1 when the first oil/gas well well depth is 322.4 meters
Inter-well distance be 6 meters；Similarly, inter-well distance when well depth is 331 meters between the first oil/gas well and the second oil/gas well is 1.5
Rice.To prevent from colliding with the second oil/gas well, downhole drill bit is adjusted by crooked well construction kit for the first oil/gas well
Direction, by 20 meters or so adjustment track drilling well, when being drilled into 350 meters of measuring point with B well spacing from when be 2 meters, illustrate underground
Adjustment reaches effect, when continuing to be drilled into 364.9 meters, when by measurement analysis underground distance up to 4 meters, at this time, it has been determined that without anti-collision
After risk, stop that the drilling well in direction is adjusted to terminate, along the normal drilling mode drilling well in drill bit direction adjusted.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of device for determining inter-well distance and direction in the drilling process of oil/gas well, which is characterized in that described device packet
Include: magnetic excitation instrument and corollary apparatus, the corollary apparatus include measurement while drilling MWD instrument and data processing system, the magnetic field
Excitation instrument, which refers to, can load direct current to the bunch tube of adjacent production of hydrocarbons well when connection direct current, and described sleeve pipe string be made to produce
Raw additional electromagnetic field, and stop serially adding load direct current to described sleeve pipe when disconnecting direct current, generate described sleeve pipe string
Additional electromagnetic field disappears；
The anode of the magnetic excitation instrument is connect with the first oil/gas well by conducting wire, the cathode of the magnetic excitation instrument and the second oil
The bunch tube of gas well is connected by conducting wire, to be existed in the drilling process of first oil/gas well by the magnetic excitation instrument
Direct current is loaded on the bunch tube of second oil/gas well, the bunch tube of the second oil/gas well is made to generate additional electromagnetic field, it is described
First oil/gas well is the oil/gas well to spud in, and second oil/gas well is the production of hydrocarbons adjacent with first oil/gas well
Well；
The MWD instrument is located in the drill string of first oil/gas well, with the casing by the MWD instrument to second oil/gas well
The electromagnetic field generated on string by the direct current of load measures, and obtains anomalous field intensity, the anomalous field intensity is
Refer to the magnetic field strength for being greater than this area standard geomagnetic field intensity；
The MWD instrument is connect with the data processing system, to be based on the anomalous field intensity, passes through the data processing system
Inter-well distance and the direction united between determining first oil/gas well and second oil/gas well.
2. device as described in claim 1, which is characterized in that described device further include: impulse generator and pressure sensor；
The impulse generator is located in first oil/gas well, and the impulse generator is connect with the MWD instrument, to obtain
The anomalous field intensity-conversion is pressure pulse signal by the anomalous field intensity that the MWD instrument measurement obtains, and will be described
Pressure pulse signal is emitted；
The pressure sensor is connect with the data processing system, to detect the pressure pulse letter of the impulse generator transmitting
Number, and the pressure pulse signal is sent to the data processing system, described first is determined by the data processing system
Inter-well distance and direction between oil/gas well and second oil/gas well.
3. a kind of determine inter-well distance and side based on device described in the claims 1 or 2 in the drilling process of oil/gas well
To method, which is characterized in that the described method includes:
When being powered during spudding in first oil/gas well to the magnetic excitation instrument, the magnetic excitation instrument exists
Direct current is loaded on the second oil/gas well bunch tube；
The MWD instrument is measured to because loading the additional electromagnetic field that the direct current generates, and obtains anomalous field intensity, and
The anomalous field intensity is sent to the data processing system；
The data processing system receives the anomalous field intensity, and determines first oil based on the anomalous field intensity
Inter-well distance and direction between gas well and second oil/gas well.
4. method as claimed in claim 3, which is characterized in that described to determine first oil based on the anomalous field intensity
Inter-well distance and direction between gas well and second oil/gas well, comprising:
Difference between the abnormal electromagnetic field intensity and this area standard geomagnetic field intensity is determined as anomalous field intensity
Difference；
Based on the abnormal electromagnetic field intensity difference, from the anomalous field strength difference and well spacing of predetermined multiple directions
In relationship templates curve between, the inter-well distance between first oil/gas well and second oil/gas well and side are determined
To.
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| CN114876396A (en) * | 2022-04-24 | 2022-08-09 | 中国石油天然气股份有限公司 | Old well casing outward-opening window method, old well processing method and related tools |
| CN117027764A (en) * | 2022-05-20 | 2023-11-10 | 中国石油天然气集团有限公司 | Drilling positioning device, method and system |
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| CN112922584A (en) * | 2021-01-21 | 2021-06-08 | 中海油田服务股份有限公司 | Adjacent well detection device, method and system |
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| CN113107472B (en) * | 2021-05-11 | 2022-12-20 | 京鸿石油钻采工程技术有限公司 | Active magnetic distance measuring device and method suitable for well drilling collision prevention |
| CN114876396A (en) * | 2022-04-24 | 2022-08-09 | 中国石油天然气股份有限公司 | Old well casing outward-opening window method, old well processing method and related tools |
| CN114876396B (en) * | 2022-04-24 | 2024-02-09 | 中国石油天然气股份有限公司 | Old well casing out-windowing method, old well treatment method and related tools |
| CN117027764A (en) * | 2022-05-20 | 2023-11-10 | 中国石油天然气集团有限公司 | Drilling positioning device, method and system |
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