CN112963139A - Wellhead determination method, device and equipment based on single-cylinder multi-well and storage medium - Google Patents
Wellhead determination method, device and equipment based on single-cylinder multi-well and storage medium Download PDFInfo
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Abstract
The application discloses a well mouth determining method, device, equipment and storage medium based on a single-cylinder multi-well, and belongs to the field of petroleum exploration and development. The method comprises the following steps: acquiring well position data of n oil and gas wells drilled on the same exploration and development platform from a database; calculating the well head priority of each spare well head in at least two spare well heads which are positioned on the same exploration and development platform with the n oil and gas wells based on the well position data; generating a predetermined wellbore trajectory corresponding to a target alternate wellhead having a maximum wellhead priority based on the well location data; and when the predetermined borehole trajectory meets the drilling deployment condition of the single-cylinder multi-well, determining the target standby well mouth as the development well mouth to be drilled. According to the method, the development well mouth to be drilled is reasonably determined by the computer equipment based on the environment of rolling exploration and development, so that the manual distribution design of the well mouth is not required to be carried out by designers with a great deal of time and energy, and the efficiency of the well mouth distribution design is improved.
Description
Technical Field
The application relates to the field of petroleum exploration and development, in particular to a well mouth determining method, device, equipment and storage medium based on a single-cylinder multi-well.
Background
The problem of well head selection in the rolling exploration and development mode is always one of the main problems of drilling of dense well head cluster wells in offshore oil fields.
In order to improve the utilization rate and service life of the artificial island or offshore platform, in recent years, marine drilling is mainly implemented in a single-cylinder multi-well mode, wherein the single-cylinder multi-well mode is that two or more boreholes entering a hydrocarbon reservoir are drilled in one wellbore.
However, due to well arrangement and encryption, the complexity of wellhead distribution design is significantly increased when single-cylinder multi-well layout is implemented, and designers need to spend a lot of time and effort to implement wellhead distribution design, so that the efficiency of implementing wellhead distribution design is low.
Disclosure of Invention
The embodiment of the application provides a well mouth determining method, a device, equipment and a storage medium based on a single-cylinder multi-well, a developing well mouth to be drilled can be reasonably determined by computer equipment based on the environment of rolling exploration and development, a designer does not need to spend a large amount of time and energy to carry out manual distribution design of the well mouth, and the efficiency of well mouth distribution design is improved. The technical scheme is as follows:
according to one aspect of the application, a single-cylinder multi-well-based wellhead determination method is provided, which is applied to computer equipment and comprises the following steps:
acquiring well data of n oil and gas wells drilled on the same exploration and development platform from a database, wherein the well data indicates the drilling deployment information of the oil and gas wells;
calculating the well head priority of each spare well head in at least two spare well heads which are positioned on the same exploration and development platform with n oil and gas wells based on the well position data, wherein n is a positive integer;
generating a preset borehole track corresponding to a target standby wellhead with the maximum wellhead priority based on the well bit data, wherein the preset borehole track is a designed track from the ground to the bottom of the well to be drilled;
and when the predetermined borehole trajectory meets the drilling deployment condition of the single-cylinder multi-well, determining the target standby well mouth as the development well mouth to be drilled.
According to another aspect of the present application, there is provided a single-cylinder multi-well based wellhead determination device, the device comprising:
the acquisition module is used for acquiring well data of n oil and gas wells which are drilled on the same exploration and development platform from a database, wherein the well data indicates the drilling deployment information of the oil and gas wells;
the calculation module is used for calculating the well head priority of each spare well head in at least two spare well heads which are positioned on the same exploration and development platform with n oil and gas wells based on the well position data, wherein n is a positive integer;
the generating module is used for generating a preset borehole track corresponding to a target standby wellhead with the maximum wellhead priority based on the well bit data, wherein the preset borehole track refers to a designed track from the ground to the bottom of a well to be drilled;
and the determining module is used for determining the target standby wellhead as a development wellhead to be drilled when the predetermined borehole track conforms to the drilling deployment condition of the single-cylinder multi-well.
According to another aspect of the present application, there is provided a computer apparatus, including: a processor and a memory, the memory storing a computer program that is loaded and executed by the processor to implement the method for single-cylinder multi-well based wellhead determination as described above.
According to another aspect of the present application, there is provided a computer readable storage medium having stored therein a computer program that is loaded and executed by a processor to implement a method of single-cylinder multi-well based uphole determination as described above.
According to another aspect of the present application, a computer program product is provided that includes computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to cause the computer device to execute the single-cylinder multi-well-based wellhead determination method as described above.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
the method comprises the steps that computer equipment obtains well bit data of n oil-gas wells on the same exploration and development platform from a database, a target spare well head is screened out from at least two spare well heads on the exploration and development platform based on the well bit data, then a preset well track corresponding to the target spare well head is generated based on the well bit data, when the preset well track meets the drilling deployment condition of a single-tube multi-well, the target spare well head is determined as a development well head to be drilled, a designer does not need to spend a large amount of time and energy to carry out manual distribution design of the well head, namely a reasonable development well head is determined based on environment data of rolling exploration and development, the efficiency of well head distribution design is improved, field construction can be better guided, and the blindness of drilling design is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 illustrates a schematic block diagram of a computer system provided in an exemplary embodiment of the present application;
FIG. 2 illustrates a flow chart of a method for single-barrel multi-well based wellhead determination provided by an exemplary embodiment of the present application;
FIG. 3 illustrates a flow chart of a method for single-barrel multi-well based wellhead determination provided by another exemplary embodiment of the present application;
FIG. 4 illustrates a schematic diagram of a wellhead layout on an exploration development platform provided by an exemplary embodiment of the present application;
FIG. 5 illustrates a schematic diagram of a single-cylinder multi-well based wellhead determination device provided by an exemplary embodiment of the present application;
fig. 6 shows a schematic structural diagram of a computer device provided in an exemplary embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Reference will first be made to several terms referred to in this application:
the rolling exploration and development is a rapid exploration method which is provided aiming at oil and gas fields with complex geological conditions and simplifies the evaluation exploration and accelerates the capacity construction of new oil fields. On the basis of estimating a few exploratory wells and early reserves and integrally recognizing an oil field, a high-yield enrichment block is preferentially put into development to carry out forward extension of development; meanwhile, while key blocks break through, exploration work of a new layer system and a new block is continued to be deepened in development, the problem of remaining oil-gas field evaluation is solved, and edge expansion is achieved. Such an exploration and development program in which "exploration is performed and" exploration is performed "is called rolling exploration and development.
The well bore, the drill bit bores to the cylindrical four walls or space that the underground that certain well depth formed communicates with the earth's surface from the earth's surface.
Reservoir refers to the basic accumulation of oil with the same pressure system in a single trap. If only oil is collected in one trap, it is called a reservoir; only natural gas, called a gas reservoir, accumulates. Trap is a place where oil and gas can be prevented from continuing to move and can be gathered; the trap consists of three parts: reservoir, cap, shelter that prevents the oil and gas to continue to move and cause oil and gas to gather.
And the directional well is deviated from the vertical line of the well head for a certain distance along a pre-designed well track in a given direction, and a well reaching a target is drilled. Cluster well is a well site or platform where two or more directional wells, which may comprise a straight well, are planned to be drilled. Wherein, the well mouth of each well is less than several meters apart, and the well bottom of each well extends to different position.
The directional drilling is a drilling method which adopts a special deflecting tool and matches with a certain technological measure to make the borehole deflect according to a preset direction. The cluster drilling is to drill several wells at the same well site by using a cluster drilling machine and directional drilling technology.
A target point refers to a predetermined target point for drilling, and may be the final direction of the wellbore trajectory, for example, one target is the first endpoint of the wellbore trajectory and two targets are the second endpoint of the wellbore trajectory.
Wellbore trajectory, the path by which a well is drilled to reach a target area in the subsurface from a surface wellhead location. Wellbore trajectory, actual borehole axis.
Depth measurement, the length of the well bore from any point along the well bore axis to the well, is typically expressed in meters (m) or feet by the letter L.
Angle of well bore, the angle between the line of borehole direction at a point and the line of gravity through that point, usually expressed as a, in degrees (°).
The azimuth of inclination is the angle rotated clockwise from the north azimuth line to the azimuth line of inclination, usually from the north azimuth line
Expressed in units of.
The well inclination change rate refers to the absolute change value of the well inclination angle in a unit well section, and the common units are degree/10 m, degree/30 m and degree/100 m.
The well inclination azimuth change rate refers to the absolute change value of the well inclination azimuth angle in a unit well section, and the general units are degree/10 m, degree/30 m and degree/100 m.
The vertical depth, which is the vertical depth of the test point, is generally indicated by H and is given in m.
The total angle change rate refers to the angle change of a three-dimensional space in a unit well section, and the common unit is degree/30 m.
Horizontal length, which refers to the length of the projection of the length of the borehole from the wellhead to the survey point on the horizontal plane, is generally denoted as S.
The horizontal displacement, i.e. the distance projected on a horizontal plane of a point of the borehole axis to the wellhead, also called the standoff, is generally denoted by a.
The apparent translation is the horizontal displacement of a point on the well on a vertical projection plane, and the common unit is m. Wherein the closer the apparent translation is to the horizontal displacement, the better the wellbore azimuth control is.
The whipstock point is a starting point hole depth at which artificial whipstock drilling is started by using a whipstock, namely a starting point of a whipstock hole section. The deflecting end point refers to the end point hole depth of artificial deflecting drilling started by a deflecting tool, namely the end point of a deflecting hole section.
The declination point is the starting point hole depth of the bending degree of the drill hole reduced by adopting an artificial bending method, namely the starting point of the declination hole section. The inclination of the drill hole can be reduced by adopting special deflecting tools, such as an eccentric wedge, a mechanical continuous deflecting device, a screw drill and the like, and can also be reduced by adopting an inclination reducing drilling tool which is formed by modifying a conventional drilling tool, such as a bias drilling tool, a pendulum drilling tool, a universal joint drilling tool and the like. The inclination reducing end point is the end point hole depth which reduces the bending degree of the drill hole by adopting an artificial bending method, namely the end point of the inclination reducing hole section.
The bottom point refers to the hole depth at the bottom of the well.
The brightened ballast group stratum is a third and new stratum, mainly comprises mottled sandstone and mudstone, the two layers usually appear in a mutual layer, generally 556-1100 meters thick and 1653 meters maximum thickness, and is in integrated contact with a pottery group of an underlying library.
The Librarian pottery group stratum is a new stratum in the third century, mainly comprises variegated sandstone and mudstone, contains conglomerate and sandstone, and has a thickness of 79-956 m.
The Dongying group stratum is a later stratum of the third-generation gradually-new age, the lithology is purple red, brownish red, ash, lime green mudstone and sandstone interbedded layer, the local included carbon mudstone, oil shale and limestone are generally 800 meters thick, and finally 1000 + 1500 meters thick, and the Dongying group stratum is not in parallel contact with the underlying sand-river street group or is super-covered on an older stratum.
The said sand-river street group, the times of which are new, is composed of a set of dark sand-shale mainly made of gray and dark gray mudstones, whose thickness is greater than 2000 m, is the main oil-bearing rock series, and is divided into four sections from bottom to top.
The drilling fluid equivalent density is the most common method for mutually calculating the formation pressure coefficient and the drilling fluid density in the oil drilling industry, and refers to the drilling fluid density required for just balancing the pressure of oil, natural gas or a water layer in a formation with a certain depth.
Oil gas well casing pipe, including surface casing pipe, technical casing pipe and reservoir casing pipe. The surface casing is the outermost casing in the oil-gas well casing program, and after drilling holes, the drilled holes are drilled into bedrock below the surface soil layer or drilled to a certain depth, and then the drilled holes are lowered into the surface casing. Surface casing is the casing that is run down to prevent collapse, contamination, and invasion of upper formation fluids from the upper surface overburden of the wellbore and to install wellhead blowout preventers.
Technical casing, also known as intermediate casing, is a casing with one or two intermediate layers in the oil and gas well casing process, and is located between a surface casing and a production casing. Technical casing is casing that is run in due to the complexity of the formation or limitations of the drilling technique. The device plays roles of isolating stratum and protecting well body in oil and gas well with larger well depth for stratum of well hole middle well section which is easy to collapse, leak, have high pressure, contain salt and the like. The technical casing is put in, so that smooth drilling of a lower well bore can be guaranteed, and the safety of drilling of an oil-gas layer can also be guaranteed.
The reservoir casing, also known as production casing, is the last layer of casing in an oil and gas well casing process. The oil-well casing is directly arranged below an oil-gas layer from a well head, oil gas is isolated from all bottom layers, a firm passage is established from the well bottom to the well head for oil-gas-water, and oil-gas pressure is guaranteed not to be leaked. The depth of the well casing run in is essentially the depth of the borehole.
Cementing is a process of setting a casing in a drilled borehole, then injecting cement slurry into an annular space between the casing and the borehole, and consolidating the casing and a stratum into a whole.
The drilling period refers to the total time from the first drilling to the completion of drilling in the drilling process, and is an important technical index reflecting the speed of drilling.
And finishing drilling, namely finishing drilling when all footings and well depths of the well completion reach the geological design requirements. The footage is a length value which is obtained by drilling and takes meters as a measurement unit, and reflects the indexes of the progress of the mining or drilling work. Illustratively, the drilling length within one working shift (i.e., 8 hours) is called a shift footage, and further, a daily footage, a monthly footage, a yearly footage, etc., i.e., footage amounts may be calculated separately for each work cycle, day and night, month, quarter, and year; the total depth drilled by one bit is called the bit footage.
The cement slurry is a working fluid used in well cementation, and the function of the cement slurry is well cementation. The well cementation operation is that the casing injects cement slurry into the annular space between the well wall and the casing and makes the cement slurry return to a certain height, namely the annular space cement slurry returns to the depth, and then the cement slurry becomes cement stone to solidify the well wall and the casing.
FIG. 1 shows a schematic block diagram of a computer system 100 provided by an exemplary embodiment of the present application, the computer system 100 including a drilling survey system 120, a database 140, a server cluster 160, and a terminal 180.
The drilling exploration system 120 is composed of equipment for exploration drilling, and can acquire drilling data, such as data of sounding, inclination angle, inclination azimuth angle, inclination change rate, vertical depth, total angle change rate, horizontal length, horizontal displacement, apparent translation, deflecting point, deflecting end point, formation, geology, and oil-gas well casing deployment during drilling. The well data includes well data, which is illustratively collected by the drilling exploration system 120 and refers to the geographic data of the well, for example, the well data may include the position of the well head, the position of the well bore, and the formation, geology, etc. of the well section.
There is a wired or wireless communication connection between the drilling exploration system 120 and the database 140, and the drilling exploration system 120 transmits and stores the collected drilling data into the database 140. The database 140 stores drilling data for at least two wells.
The database 140 is also connected with the server cluster 160 in a wired or wireless communication manner, and the server cluster 160 can obtain well drilling data from the database 140 and analyze the well drilling data to obtain the required data. Illustratively, the server cluster 160 obtains the drilling data of n wells from the database, and screens out the development well head to be drilled from the standby well head based on the drilling data of the n wells.
The server cluster 160 is provided with a display device, and the server cluster 160 may display the analysis data of the development wellhead to be drilled through the display device, for example, a predetermined wellbore trajectory corresponding to the development wellhead to be drilled is displayed on the display device, or a constructable scheme for drilling based on the development wellhead to be drilled. Alternatively, the server cluster 160 also communicates with the terminal 180 via a wired or wireless connection, and the analytical data of the development wellhead to be drilled may be displayed on the display device of the terminal 180.
Optionally, the drilling exploration system 120 further comprises a console of the drilling equipment; the server cluster 160 may also send the above analysis data of the development wellhead to be drilled to the console of the drilling equipment for display.
It should be noted that a client is installed and operated on the server cluster 160 or the terminal 180, and the client can implement triggering of a data processing function of drilling, for example, triggering of selection of a development wellhead to be drilled, generation of a wellbore trajectory corresponding to the development wellhead to be drilled, and the like.
The server cluster 160 may include at least one of a server, a plurality of servers, a cloud computing platform, and a virtualization center. Illustratively, the terminal 180 may include at least one of a smartphone, a tablet computer, an e-book reader, an MP3(Moving Picture Experts Group Audio Layer III) player, an MP4(Moving Picture Experts Group Audio Layer IV) player, a laptop and a desktop computer, and a notebook computer. Those skilled in the art will appreciate that the number of terminals 180 described above may be greater or fewer. For example, the number of the terminals 180 may be only one, or the number of the terminals 180 may be tens of or hundreds, or more, and the number of the terminals 180 and the type of the device are not limited in the embodiment of the present application.
Fig. 2 shows a flowchart of a single-cylinder multi-well-based wellhead determination method provided by an exemplary embodiment of the present application, the method is applied to a computer device, the computer device may include a server and a terminal, and the method is exemplified by the application to the server shown in fig. 1, and the method includes:
For example, each artificial island or offshore platform can be used as an exploration and development platform, each exploration and development platform is stored corresponding to development data on the exploration and development platform, and the development data comprises well position data of oil and gas wells; when a development wellhead to be drilled is selected on a target exploration and development platform, a server acquires well data of n oil and gas wells which are drilled on the target exploration and development platform from a database, wherein the well data indicate drilling deployment information of the oil and gas wells, and n is a positive integer. Illustratively, the database is provided by a geological reservoir department.
And 202, calculating the well head priority of each spare well head in at least two spare well heads which are positioned on the same exploration and development platform with the n oil and gas wells based on the well position data.
At least two spare well heads exist on the exploration and development platform where the n oil and gas wells are located, and the at least two spare well heads are used for providing development well heads for development of subsequent oil and gas wells in the rolling exploration and development process; the server calculates a wellhead priority for each of the at least two backup wellheads based on the well location data.
Illustratively, the server prioritizes the wellheads for use with at least two of the alternate wellheads on the exploration and development platform according to a cluster well placement principle. Illustratively, the above-mentioned cluster well pattern rule may include at least one of a proximity rule and a non-intersecting horizontal displacement minimum distance method.
Optionally, the server determines a geological target to be drilled; calculating the horizontal projection distance of a connecting line between each standby wellhead and the geological target; calculating the number of intersection points between the horizontal projection of the connecting line corresponding to each spare wellhead and the horizontal projection of the well track of each oil and gas well in the n oil and gas wells; and calculating the wellhead priority of each spare wellhead according to the horizontal projection distance and the number of the intersection points.
Illustratively, a priority index model of the wellhead is set in the server, the priority index model is constructed according to the horizontal projection distance and the number of the intersection points, and the priority index model can be expressed by the following formula:
F＝a*(D-Dmin)/(Dmax-Dmin)+b*Count；
wherein F represents a wellhead priority index; d is the horizontal projection distance of the connecting line between the standby wellhead and the geological target; dmin is the minimum horizontal projection distance of a connecting line between the standby wellhead and the geological target; dmax refers to the maximum horizontal projection distance of a connecting line between the standby wellhead and the geological target; the Count refers to the number of intersection points between the horizontal projection of the connecting line and the horizontal projection of the shallow well track of the drilled oil-gas well; a. b is a weight coefficient.
Optionally, the server determines a small-sized wellhead or a wellhead that has performed drilling but is not fully utilized as a priority back-up wellhead.
And step 203, generating a preset borehole track corresponding to the target standby wellhead with the maximum wellhead priority based on the well bit data.
The server is provided with an anti-collision rule and an optimal track rule, and generates a preset well track under a target standby wellhead which meets the anti-collision rule and the optimal track rule based on well data. Wherein, the predetermined borehole trajectory refers to a designed trajectory from the surface to the bottom of the well to be drilled.
Illustratively, the above-described anti-collision rules are used to avoid collisions of a predetermined wellbore trajectory with the actual wellbore trajectories of n hydrocarbon wells. Illustratively, the above-described optimal trajectory rules are used to facilitate the implementation of a predetermined wellbore trajectory for drilling.
And step 204, when the preset borehole orbit accords with the drilling deployment condition of the single-cylinder multi-well, determining the target standby wellhead as a development wellhead to be drilled.
Drilling deployment conditions of a single cylinder and multiple wells are set in the server; and when the predetermined borehole trajectory meets the drilling deployment condition of the single-cylinder multi-well, determining the target standby well mouth as the development well mouth to be drilled.
Illustratively, the drilling deployment conditions of the single-cylinder multi-well comprise that the unutilized size of a target standby wellhead is larger than the size of a casing of a running surface required by a preset borehole orbit, and the requirement of a minimum annular space for well cementation is met; and when the size of the casing of the running surface layer required by the preset borehole orbit is smaller than the unused size of the target spare wellhead and the requirement of the minimum annular space gap for cementing is met, the server determines the target spare wellhead as a development wellhead to be drilled. The requirement of the minimum annular space gap for well cementation means that the gap of the annular space between the casing and the borehole is greater than or equal to the minimum gap meeting the well cementation construction conditions.
And step 205, when the preset well hole track does not accord with the well drilling deployment conditions of the single-cylinder multi-well, determining the spare well mouth with the maximum well mouth priority in the rest spare well mouths as a target spare well mouth, and determining a development well mouth to be drilled by starting from the step of generating the preset well hole track corresponding to the target spare well mouth with the maximum well mouth priority based on the well bit data.
And when the preset borehole orbit does not accord with the drilling deployment condition of the single-cylinder multi-well, the server determines the spare well mouth with the maximum well mouth priority in the rest spare well mouths as a target spare well mouth, and returns to the step 203 to be executed again so as to determine the development well mouth to be drilled.
Illustratively, when the required run-in surface casing size for the predetermined wellbore trajectory is greater than the unutilized size of the target alternate wellhead, the server determines the alternate wellhead with the largest wellhead priority among the remaining alternate wellheads as the target alternate wellhead, and returns to step 203 to re-execute to determine the development wellhead to be drilled.
Illustratively, the remaining spare wellheads refer to other spare wellheads of the at least two spare wellheads except the target spare wellhead calculated in the above step.
After determining the development wellheads to be drilled, the server further determines a drilling embodiment for the single-wellbore multi-well based on the trajectory data for the predetermined wellbore trajectory, the drilling embodiment comprising at least one of an placeholder drill tool format and a common surface wellbore format. Wherein, the space occupying drilling tool form means that each well in a shaft is provided with an independent well hole; common surface wellbore form refers to a wellbore in which at least two wells share a common surface.
Illustratively, if multi-round optimization is performed, drilling deployment conditions of a single-cylinder multi-well are still not met, other spare well mouths are not available on the same exploration and development platform, and a geological department is recommended to modify well position data and re-optimize according to a geological engineering integrated thought.
In summary, the wellhead determining method based on a single-cylinder multi-well provided by this embodiment obtains well data of n oil and gas wells on the same exploration and development platform from a database, screens out one target spare wellhead from at least two spare wellheads on the exploration and development platform based on the well data, then generates a predetermined wellbore trajectory corresponding to the target spare wellhead based on the well data, when the preset borehole orbit meets the drilling deployment condition of the single-cylinder multi-well, the target spare wellhead is determined as a development wellhead to be drilled, so that the manual distribution design of the wellhead is not required to be carried out by a designer with great time and energy, the reasonable development well mouth is determined based on the environmental data of the rolling exploration and development, the efficiency of well mouth distribution design is improved, the field construction can be guided better, and the blindness of drilling design is reduced.
Illustratively, if the well deployment conditions for a single-barrel multi-well include both: firstly, the separation coefficient between a preset borehole track to be drilled and an actual borehole track of an adjacent well is greater than a separation coefficient threshold value; if the second surface casing to be drilled has a size smaller than the unutilized size of the target alternate wellhead and meets the minimum annulus clearance requirement for cementing, step 204 in fig. 2 may include steps 2041 to 2046, and step 205 may include step 2051, as shown in fig. 3, as follows:
step 2041, calculate the separation coefficient between the predetermined wellbore trajectory and the actual wellbore trajectory of the adjacent well.
In order to avoid collision with an adjacent well, it is necessary to ensure that the separation coefficient between the predetermined wellbore trajectory and the actual wellbore trajectory of the adjacent well is greater than the separation coefficient threshold value, so the separation coefficient between the predetermined wellbore trajectory and the actual wellbore trajectory of the adjacent well is first calculated, and when the separation coefficient between the predetermined wellbore trajectory and the actual wellbore trajectory of the adjacent well is greater than the separation coefficient threshold value, step 2042 is executed; otherwise, step 2045 is performed.
And 2042, when the separation coefficient between the preset borehole trajectory and the actual borehole trajectory of the adjacent well is greater than the separation coefficient threshold value, predicting the formation pressure of the stratum through which the well to be drilled passes based on the trajectory data of the preset borehole trajectory and the actual drilling data of the adjacent well in the n oil and gas wells.
The server predicts the stratum structure of the stratum through which the well is to be drilled and the stratum pressure of the stratum through which the well is to be drilled based on the track data of the predetermined well track and the real drilling data of the adjacent wells in the n oil and gas wells. The formation pressures include formation pore pressure, formation collapse pressure, and formation fracture pressure, and are commonly reported in grams per cubic centimeter (g/cm)3) The formation pore pressure refers to the pressure of the fluid in the pores of the underground rock. Formation collapse pressure, refers to the minimum critical drilling fluid column pressure that maintains the borehole wall stable. Formation fracture pressure refers to the critical bottom hole fluid pressure to which the formation is subjected when creating hydraulic fractures.
The server determines the well structure to be drilled according to the formation pressure and the formation structure of the formation through which the wellbore trajectory passes. Illustratively, on the premise of ensuring the safety of drilling, the structural design of the well body should be simplified as much as possible so as to reduce the construction difficulty. Illustratively, the well bore configuration includes the depth of each of at least two well bores to be drilled, the type of well casing run in, the number of well casings run in, and the size of the well casings run in.
Optionally, the server determines the drilling fluid density under the required drilling fluid system according to the formation pressure; and determining a well structure to be drilled based on the stratum structure and the drilling density. That is, the server performs well optimization design in combination with drilling fluid and well cementing design.
And 2044, when the size of the surface casing to be drilled is smaller than the unused size of the target spare wellhead and the requirement of the minimum annular space gap for well cementation is met, determining the target spare wellhead as a development wellhead to be drilled.
Illustratively, the target backup wellhead may be an undeveloped wellhead or a developed, but not fully utilized, wellhead. And when the size of the surface casing to be drilled is smaller than the unused size of the target spare wellhead and the requirement of the minimum annular space gap for well cementation is met, determining the target spare wellhead as a development wellhead to be drilled.
Optionally, if the target alternate wellhead is an undeveloped wellhead, the drilling deployment conditions for the single-barrel multi-well may further include that a remaining dimension of the unutilized dimension is greater than the surface casing minimum dimension; when the size of the surface casing to be drilled is smaller than the unused size of the target standby wellhead, calculating the difference between the unused size and the size of the surface casing to obtain the remaining size of the unused size; and when the residual size is larger than the minimum size of the surface casing and the requirement of the minimum annular space gap for well cementation is met, determining the target spare wellhead as a development wellhead to be drilled.
That is, step 2051 is performed when the surface casing size to be drilled is greater than the unutilized size of the target alternate wellhead, or when the cementing minimum annulus clearance requirement is not satisfied, or when the surface casing size to be drilled is greater than the unutilized size of the target alternate wellhead and the cementing minimum annulus clearance requirement is not satisfied.
And determining the spare wellhead with the maximum wellhead priority in the rest spare wellheads as a target spare wellhead, returning to the step 203, and re-determining the development wellhead to be drilled.
In summary, according to the wellhead determination method based on the single-cylinder multi-well provided by the embodiment, it is first determined whether the separation coefficient between the actual wellbore trajectories of the predetermined wellbore trajectory and the adjacent well is greater than the separation coefficient threshold value, so as to ensure that the wellbore trajectories between the to-be-drilled well and the adjacent well are safely and reasonably arranged and do not collide with each other; and then, performing predictive design on the well body structure to be drilled, and judging whether the unused size of the target standby well mouth can accommodate the running-in of the surface casing to be drilled, so that the finally determined development well mouth to be drilled and the development design can be really implemented.
The method is suitable for well mouth optimization of single-cylinder multi-well drilling design of artificial islands and ocean platforms, comprehensively considers the influences of well mouth size, spacing, collision prevention safety, well body structures, implementation modes and the like on single-cylinder multi-well implementation, optimizes the well hole tracks and the well body structures in multiple rounds, aims to reduce the drilling design blindness and the field implementation difficulty, improves the drilling design efficiency and the integral utilization rate of the platform well mouths, optimizes the single-cylinder multi-well mouths and improves the comprehensive benefits of the artificial islands or the ocean platforms.
By way of example, the single-cylinder multi-well-based wellhead determination method provided by the application is exemplified, assuming that a certain artificial island geology deploys a development well (i.e. to be drilled), and is implemented by using a single-cylinder double well, given geological target point T1 coordinates are X: -1772.46m, Y: -915.98m, the vertical depth is 2817m, geological target point T2 coordinates are X: -1832.46m, Y: -939.98m, and the vertical depth is 2938 m. Referring to fig. 4, there is shown a north wellhead layout diagram of one of the artificial islands, and the 5 spare wellheads are numbered 16, 18, 19, 20 and 41.
(1) Wellhead prioritization for use by alternate wellheads.
The number of the current spare wellheads of the artificial island is 5, as shown in fig. 4, the artificial island is completely positioned at the north side, the sizes of the artificial island are phi 660.4 millimeters (mm) and phi 914.4mm respectively, and the coordinates and the current situation are as shown in the following table 1:
TABLE 1
Connecting a geological target T1 with each spare wellhead, calculating the wellhead priority index used by each wellhead according to the horizontal projection distance of the corresponding connecting line and the horizontal projection intersection number of the well track of the drilled oil-gas well shallow layer (taking the well section with the vertical depth less than 1000 m), and taking the weight coefficient a as 3 and b as 1, wherein the results are shown in the following table 2:
TABLE 2
(2) And taking the No. 41 as a primary selection wellhead (namely a target standby wellhead), and optimizing the design of the borehole track. The separation coefficient is larger than 1.0 and is used as a constraint condition, the optimized borehole orbit design is as the following table 3, and the anti-collision requirement is met:
TABLE 3
(3) And (3) performing single-well stratum three-pressure prediction analysis according to the current designed borehole orbit and the actual drilling condition of the adjacent well, wherein the results are as follows:
TABLE 4
(4) Well bore configuration optimization and determination of minimum wellhead size
The main target layers of the well are a sand two-section layer and a sand three-section layer, the stratum collapse pressure is higher, the sylvite polymer system drilling fluid is optimally used, and the density is not lower than 1.35g/cm for ensuring the stability of the well wall3. The formation of the Librarian pottery group is a typical weak formation of the block, well leakage is easy to occur due to the existence of special lithology, and the density of drilling fluid is generally not higher than 1.30g/cm3Therefore, the well needs to be put into a technical casing to seal the earthenware group stratum of the museum so as to ensure the safety of drilling. The well bore structure is designed as follows 5:
TABLE 5
The size of a production casing is phi 139.7mm, the size of a surface casing is determined to be phi 339.7mm from bottom to top, theoretically, the size of the minimum wellhead is not less than phi 914.4mm, the size of a primarily selected No. 59 wellhead is phi 660.4mm, and two groups of phi 244.5mm casing strings are already put in, so that the well cannot be implemented, and similarly, No. 16 wellheads ranked as C2 are limited in size and cannot be implemented.
(5) Re-selecting wellheads and optimizing wellbore trajectory design
According to the priority ranking, a No. 20 well head with the size phi of 914.4mm is selected, the separation coefficient is larger than 1.0 and is used as a constraint condition, the optimized well track design is as the following table 6, and the anti-collision requirement is met:
TABLE 6
(6) The current design borehole orbit (namely the reserved borehole orbit) and the actual drilling condition of the adjacent well are used for single-well stratum three-pressure prediction analysis, and the results are shown in the following table 7:
TABLE 7
| Formation of earth | Pore pressure g/cm3 | Collapse pressure g/cm3 | Rupture pressure g/cm3 |
| Minghua ballast group | 0.93-1.04 | 0.95-1.17 | > 1.60 (vertical depth > 870m) |
| Librarian pottery group | 0.93-1.04 | 0.95-1.17 | ＞1.71 |
| Dongying group | 0.95-1.05 | 1.01-1.30 | ＞1.77 |
| Section of sand | 1.03-1.05 | 1.24-1.31 | ＞1.83 |
| Sand section | 1.00-1.03 | 1.16-1.30 | ＞1.82 |
| sandIc section | 1.00-1.03 | 1.24 | ＞1.83 |
(7) Well structure optimization
The maximum well deviation angle of the newly designed well track is reduced to 41 degrees, the corresponding stratum collapse pressure of the lower stratum is slightly reduced, but still higher than the expected drilling fluid density of the Liangtai group stratum, therefore, a layer of technical casing is needed to be put in to seal the Liangtai group stratum, the well body structure is designed to be three openings, the potassium salt polymer system drilling fluid is adopted, and the well body structure is designed as the following table 8:
TABLE 8
The size of the surface casing is phi 339.7mm, and the size of the selected No. 20 well head is phi 914.4mm, thereby meeting the implementation requirements. The well track is designed to be shallow 170m deflecting and should be implemented by adopting an occupying drilling tool mode.
(8) Determining wellhead optimization results
The No. 20 well head is the optimal well head for implementing a single-cylinder multi-well on the current geological target, and the implementation mode is that an occupying drilling tool mode is adopted to drill a well opening in the well head.
In summary, the method for determining a wellhead based on a single-cylinder multi-well provided by this embodiment is suitable for optimizing wellheads of single-cylinder multi-well drilling designs of artificial islands and offshore platforms, comprehensively considers influences of wellhead sizes, intervals, collision prevention safety, well body structures, implementation modes and the like on single-cylinder multi-well implementation, optimizes a multi-round sub-optimal wellbore track and well body structures, aims at reducing drilling design blindness and field implementation difficulty, improves drilling design efficiency and overall utilization rate of platform wellheads, optimizes single-cylinder multi-well wellheads, and improves comprehensive benefits of artificial islands or offshore platforms.
FIG. 5 illustrates a block diagram of a single-barrel multi-well based wellhead determination device provided by an exemplary embodiment of the present application. The apparatus may be implemented as part or all of a server or a terminal by software, hardware, or a combination of both. The device includes:
the acquisition module 301 is used for acquiring well data of n completely drilled oil and gas wells on the same exploration and development platform from a database, wherein the well data indicates the drilling deployment information of the oil and gas wells;
the calculation module 302 is used for calculating the wellhead priority of each spare wellhead in at least two spare wellheads which are positioned on the same exploration and development platform with n oil and gas wells based on the well position data, wherein n is a positive integer;
the generating module 303 is configured to generate a predetermined wellbore trajectory corresponding to a target standby wellhead with a maximum wellhead priority based on the well bit data, where the predetermined wellbore trajectory is a designed trajectory from the ground to the bottom of the well to be drilled;
a determination module 304 for determining the target alternate wellhead as a development wellhead to be drilled when the predetermined wellbore trajectory conforms to a drilling deployment condition of the single-cylinder multi-well.
In some embodiments, the drilling deployment conditions for the single-cylinder multi-well include that the surface casing size to be drilled is smaller than the unutilized size of the target spare wellhead, and the minimum annulus clearance requirement for cementing is met; a determination module 304 for:
predicting the formation pressure of a stratum through which a well to be drilled passes based on the track data of the preset well track and the real drilling data of the adjacent wells in the n oil and gas wells;
determining a well structure to be drilled according to the formation pressure of a formation through which the well to be drilled passes and the formation structure, wherein the well structure comprises the size of a surface casing to be drilled;
and when the size of the surface casing to be drilled is smaller than the unused size of the target spare wellhead and the requirement of the minimum annular space gap for well cementation is met, determining the target spare wellhead as a development wellhead to be drilled.
In some embodiments, the target alternate wellhead is an undeveloped wellhead, the drilling deployment conditions for the single-barrel multi-well further include that a remaining dimension of the unutilized dimension is greater than the surface casing minimum dimension, and the minimum annulus clearance requirement for cementing is met; a determination module 304 for:
when the size of the surface casing to be drilled is smaller than the unused size of the target standby wellhead, calculating the difference between the unused size and the size of the surface casing to obtain the remaining size of the unused size;
and when the residual size is larger than the minimum size of the surface casing and the requirement of the minimum annular space for well cementation is met, determining the target standby wellhead as a development wellhead to be drilled.
In some embodiments, the drilling deployment condition for the single-barreled multi-well further comprises that a separation coefficient between the predetermined wellbore trajectory to be drilled and the actual wellbore trajectory of the adjacent well is greater than a separation coefficient threshold; a determination module 304 for:
calculating a separation coefficient between the predetermined wellbore trajectory and an actual wellbore trajectory of an adjacent well;
and when the separation coefficient between the preset borehole orbit and the actual borehole orbit of the adjacent well is larger than the separation coefficient threshold value, predicting the formation pressure of the stratum through which the well is to be drilled based on the orbit data of the preset borehole orbit and the actual drilling data of the adjacent well in the n oil-gas wells.
In some embodiments, a calculation module 302 to:
determining a geological target to be drilled;
calculating the horizontal projection distance of a connecting line between each standby wellhead and the geological target;
calculating the number of intersection points between the horizontal projection of the connecting line corresponding to each spare wellhead and the horizontal projection of the well track of each oil and gas well in the n oil and gas wells;
and calculating the wellhead priority of each spare wellhead according to the horizontal projection distance and the number of the intersection points.
In some embodiments, the determining module 304 is further configured to:
and when the preset well hole track does not accord with the well drilling deployment condition, determining the spare well hole with the maximum well hole priority in the rest spare well holes as a target spare well hole, starting to execute the step of generating the preset well hole track corresponding to the target spare well hole with the maximum well hole priority based on the well bit data, and determining a development well hole to be drilled.
In some embodiments, the determining module 304 is further configured to:
a drilling embodiment for a single multi-well is determined based on trajectory data for a predetermined wellbore trajectory, the drilling embodiment comprising at least one of an occupant drilling tool format and a common surface wellbore format.
In summary, the wellhead determining device based on a single-cylinder multi-well provided by this embodiment obtains well data of n oil and gas wells on the same exploration and development platform from a database, screens out a target spare wellhead from at least two spare wellheads on the exploration and development platform based on the well data, then generates a predetermined wellbore trajectory corresponding to the target spare wellhead based on the well data, when the preset borehole orbit meets the drilling deployment condition of the single-cylinder multi-well, the target spare wellhead is determined as a development wellhead to be drilled, so that the manual distribution design of the wellhead is not required to be carried out by a designer with great time and energy, the environment data based on the rolling exploration and development determines a reasonable development wellhead, the efficiency of wellhead distribution design is improved, site construction can be guided better, and the blindness of drilling design is reduced.
Fig. 6 shows a schematic structural diagram of a computer device provided in an exemplary embodiment of the present application. The computer device may be a device that performs the method for single-cylinder multi-well based wellhead determination as provided herein, and may be a terminal or a server. Specifically, the method comprises the following steps:
the computer apparatus 400 includes a Central Processing Unit (CPU) 401, a system Memory 404 including a Random Access Memory (RAM) 402 and a Read Only Memory (ROM) 403, and a system bus 405 connecting the system Memory 404 and the Central Processing Unit 401. The computer device 400 also includes a basic Input/Output System (I/O System)406, which facilitates the transfer of information between devices within the computer, and a mass storage device 407 for storing an operating System 413, application programs 414, and other program modules 415.
The basic input/output system 406 includes a display 408 for displaying information and an input device 409 such as a mouse, keyboard, etc. for user input of information. Wherein a display 408 and an input device 409 are connected to the central processing unit 401 through an input output controller 410 connected to the system bus 405. The basic input/output system 406 may also include an input/output controller 410 for receiving and processing input from a number of other devices, such as a keyboard, mouse, or electronic stylus. Similarly, input/output controller 410 may also provide output to a display screen, a printer, or other type of output device.
The mass storage device 407 is connected to the central processing unit 401 through a mass storage controller (not shown) connected to the system bus 405. The mass storage device 407 and its associated computer-readable media provide non-volatile storage for the computer device 400. That is, the mass storage device 407 may include a computer-readable medium (not shown) such as a hard disk or Compact disk Read Only Memory (CD-ROM) drive.
Computer-readable media may include computer storage media and communication media. Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes RAM, ROM, Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), flash Memory or other Solid State Memory technology, CD-ROM, Digital Versatile Disks (DVD), or Solid State Drives (SSD), other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage, or other magnetic storage devices. The Random Access Memory may include a resistive Random Access Memory (ReRAM) and a Dynamic Random Access Memory (DRAM). Of course, those skilled in the art will appreciate that computer storage media is not limited to the foregoing. The system memory 404 and mass storage device 407 described above may be collectively referred to as memory.
According to various embodiments of the present application, the computer device 400 may also operate as a remote computer connected to a network through a network, such as the Internet. That is, the computer device 400 may be connected to the network 412 through the network interface unit 411 connected to the system bus 405, or may be connected to other types of networks or remote computer systems (not shown) using the network interface unit 411.
The memory further includes one or more programs, and the one or more programs are stored in the memory and configured to be executed by the CPU.
In an alternative embodiment, a computer apparatus is provided that includes a processor and a memory having at least one instruction, at least one program, set of codes, or set of instructions stored therein, the at least one instruction, at least one program, set of codes, or set of instructions being loaded and executed by the processor to implement a monocular multi-well based wellhead determination method as described above.
In an alternative embodiment, a computer readable storage medium is provided having stored therein at least one instruction, at least one program, set of codes, or set of instructions that is loaded and executed by a processor to implement a method of single-wellbore multi-well based uphole determination as described above.
Optionally, the computer-readable storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a Solid State Drive (SSD), or an optical disc. The Random Access Memory may include a resistive Random Access Memory (ReRAM) and a Dynamic Random Access Memory (DRAM). The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The present application further provides a computer-readable storage medium having stored therein at least one instruction, at least one program, code set, or set of instructions that is loaded and executed by a processor to implement the method for determining a single-wellbore multi-well based wellhead provided by the method embodiments described above.
The present application also provides a computer program product comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to cause the computer device to execute the single-cylinder multi-well-based wellhead determination method as described above.
It should be understood that reference to "a plurality" herein means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A wellhead determination method based on a single cylinder and multiple wells is characterized by being applied to computer equipment and comprising the following steps:
acquiring well data of n oil and gas wells drilled on the same exploration and development platform from a database, wherein the well data indicate the drilling deployment information of the oil and gas wells;
calculating the well head priority of each spare well head in at least two spare well heads which are positioned on the same exploration and development platform with the n oil and gas wells based on the well position data, wherein n is a positive integer;
generating a preset borehole track corresponding to a target standby wellhead with the maximum wellhead priority based on the well bit data, wherein the preset borehole track refers to a design track from the ground to the bottom of the well to be drilled;
when the predetermined wellbore trajectory conforms to a drilling deployment condition of a single-cylinder multi-well, determining the target alternate wellhead as the development wellhead to be drilled.
2. The method of claim 1, wherein the drilling deployment conditions for the single-barrel multi-well include that the surface casing size to be drilled is smaller than the unutilized size of the target alternate wellhead and satisfies a cemented minimum annulus clearance requirement;
when the predetermined wellbore trajectory conforms to a drilling deployment condition of a single-cylinder multi-well, determining the target alternate wellhead as the development wellhead to be drilled, comprising:
predicting the formation pressure of the stratum through which the well to be drilled passes based on the track data of the predetermined well track and the real drilling data of the adjacent well in the n oil and gas wells;
determining a well bore structure to be drilled according to the formation pressure and the formation structure of the formation through which the well to be drilled passes, wherein the well bore structure comprises the size of a surface casing to be drilled;
and when the size of the surface casing to be drilled is smaller than the unutilized size of the target spare wellhead and the requirement of the minimum annular space for well cementation is met, determining the target spare wellhead as the development wellhead to be drilled.
3. The method of claim 2, wherein the target alternate wellhead is an undeveloped wellhead, the drilling deployment conditions for the single-barrel multi-well further comprising a remaining size of the unutilized size being greater than a surface casing minimum size and meeting the cemented minimum annulus clearance requirement;
determining the target alternate wellhead as the development wellhead to be drilled when the surface casing size to be drilled is smaller than the unutilized size of the target alternate wellhead and the cementing minimum annulus clearance requirement is met, comprising:
when the size of the surface casing to be drilled is smaller than the unutilized size of the target spare wellhead, calculating the difference between the unutilized size and the size of the surface casing to obtain the remaining size of the unutilized size;
and when the residual size is larger than the minimum size of the surface casing and the requirement of the minimum annular space for well cementation is met, determining the target standby wellhead as the development wellhead to be drilled.
4. The method of claim 2, wherein the drilling deployment condition for the single-wellbore multi-well further comprises a separation factor between the predetermined wellbore trajectory to be drilled and an actual wellbore trajectory of an adjacent well being greater than a separation factor threshold;
the predicting the formation pressure of the stratum through which the well is to be drilled based on the track data of the predetermined wellbore track and the actual drilling data of the adjacent wells of the n oil and gas wells comprises the following steps:
calculating a separation coefficient between the predetermined wellbore trajectory and an actual wellbore trajectory of the adjacent well;
and when the separation coefficient between the preset borehole track and the actual borehole track of the adjacent well is larger than the separation coefficient threshold value, predicting the formation pressure of the stratum through which the well to be drilled passes based on the track data of the preset borehole track and the actual drilling data of the adjacent well in the n oil-gas wells.
5. The method of any one of claims 1 to 4, wherein said calculating a wellhead priority for each of at least two alternate wellheads on the same exploration and development platform as said n hydrocarbon wells based on said well site data comprises:
determining the geological target to be drilled;
calculating the horizontal projection distance of a connecting line between each standby wellhead and the geological target;
calculating the number of intersection points between the horizontal projection of the connecting line corresponding to each spare well head and the horizontal projection of the well track of each oil and gas well in the n oil and gas wells;
and calculating the wellhead priority of each spare wellhead according to the horizontal projection distance and the number of the intersection points.
6. The method of any of claims 1 to 4, further comprising:
and when the preset well hole track does not accord with the well drilling deployment condition, determining the spare well hole with the maximum well hole priority in the rest spare well holes as the target spare well hole, and determining the development well hole to be drilled by starting from the step of generating the preset well hole track corresponding to the target spare well hole with the maximum well hole priority based on the well bit data.
7. The method of any of claims 1 to 4, wherein determining the target alternate wellhead as being behind the development wellhead to be drilled when the predetermined wellbore trajectory conforms to a drilling deployment condition for single-wellbore and multi-well comprises:
determining a drilling embodiment for the single-wellbore multi-well based on trajectory data for the predetermined wellbore trajectory, the drilling embodiment comprising at least one of an occupant drilling tool format and a common surface wellbore format.
8. A single-cylinder multi-well based wellhead determination device, the device comprising:
the system comprises an acquisition module, a data processing module and a data processing module, wherein the acquisition module is used for acquiring well data of n oil and gas wells which are drilled on the same exploration and development platform from a database, and the well data indicates the drilling deployment information of the oil and gas wells;
the calculation module is used for calculating the wellhead priority of each spare wellhead in at least two spare wellheads which are positioned on the same exploration and development platform with the n oil and gas wells based on the well position data, wherein n is a positive integer;
the generating module is used for generating a preset borehole track corresponding to a target standby wellhead with the maximum wellhead priority based on the well bit data, wherein the preset borehole track refers to a design track from the ground to the bottom of the well to be drilled;
and the determining module is used for determining the target standby wellhead as the development wellhead to be drilled when the preset borehole track conforms to the drilling deployment condition of the single-cylinder multi-well.
9. A computer device, characterized in that the computer device comprises: a processor and a memory, the memory storing a computer program that is loaded and executed by the processor to implement the method of single-cylinder multi-well based wellhead determination according to any of claims 1 to 7.
10. A computer-readable storage medium having stored thereon a computer program for loading and execution by a processor to perform the method of any of claims 1 to 7.
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