CN117927219B - Wellbore stability determining method, device, equipment and medium - Google Patents
Wellbore stability determining method, device, equipment and medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 64
- 239000011435 rock Substances 0.000 claims abstract description 100
- 238000005520 cutting process Methods 0.000 claims description 35
- 238000005553 drilling Methods 0.000 claims description 30
- 238000004364 calculation method Methods 0.000 claims description 23
- 238000004590 computer program Methods 0.000 claims description 16
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- 239000012530 fluid Substances 0.000 description 4
- 239000012634 fragment Substances 0.000 description 4
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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
- E21B47/005—Monitoring or checking of cementation quality or level
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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Abstract
The embodiment of the application discloses a method, a device, electronic equipment and a medium for determining wellbore stability. The method comprises the following steps: determining a first duty ratio according to the actual return-out quality of rock debris of the unit well depth of the actual well bore and the calculated return-out quality; determining a second duty ratio according to the theoretical return-out quality of the rock debris of the unit well depth of the theoretical shaft and the calculated return-out quality; wherein the theoretical wellbore is an adjacent well to the actual wellbore; the stability of the actual wellbore is determined based on the first duty cycle and the second duty cycle. Through the scheme, the ratio of the actual return-out quality of the rock debris of the unit well depth generated in real time by the actual shaft to the calculated return-out quality can be calculated and compared with the data of the theoretical shaft, so that the accurate judgment and real-time quantitative monitoring of the stability of the actual shaft are realized.
Description
Technical Field
The application relates to the field of petroleum exploration and development, in particular to a method and a device for determining wellbore stability, electronic equipment and a medium.
Background
Wellbore stability is an important reference property for smoothly constructing a horizontal well and drilling a long horizontal section horizontal well, and therefore, the stability of the wellbore needs to be monitored in the construction process. In the traditional method, subjective judgment is carried out on the stability of a shaft manually. The method has the problems that the accuracy rate of the stability analysis of the shaft is low, the judgment is not timely, and the quantitative stability analysis cannot be realized.
Disclosure of Invention
The application provides a method, a device, electronic equipment and a medium for determining the stability of a shaft, which are used for realizing accurate judgment and real-time quantitative monitoring of the stability of an actual shaft.
According to an aspect of the present application, there is provided a wellbore stability determination method, the method comprising:
Determining a first duty ratio according to the actual return-out quality of rock debris of the unit well depth of the actual well bore and the calculated return-out quality;
Determining a second duty ratio according to the theoretical return-out quality of the rock debris of the unit well depth of the theoretical shaft and the calculated return-out quality; wherein the theoretical wellbore is an adjacent well to the actual wellbore;
and determining the stability of the actual shaft according to the first duty ratio and the second duty ratio.
According to another aspect of the present application, there is provided a wellbore stability determination apparatus, the apparatus comprising:
The first duty ratio determining module is used for determining a first duty ratio according to the actual returning quality of rock debris in unit well depth of an actual shaft and the calculated returning quality;
The second duty ratio determining module is used for determining a second duty ratio according to the theoretical returning quality of rock debris in unit well depth of the theoretical shaft and the calculated returning quality; wherein the theoretical wellbore is an adjacent well to the actual wellbore;
And the stability determining module is used for determining the stability of the actual shaft according to the first duty ratio and the second duty ratio.
According to another aspect of the present application, there is provided an electronic device including:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the wellbore stability determination method of any of the embodiments of the application.
According to another aspect of the application, there is provided a computer readable storage medium storing computer instructions for causing a processor to perform the wellbore stability determination method of any of the embodiments of the application.
According to the technical scheme, the first duty ratio is determined according to the actual returning quality of rock debris in unit well depth of an actual shaft and calculated returning quality; determining a second duty ratio according to the theoretical return-out quality of the rock debris of the unit well depth of the theoretical shaft and the calculated return-out quality; wherein the theoretical wellbore is an adjacent well to the actual wellbore; the stability of the actual wellbore is determined based on the first duty cycle and the second duty cycle. Through the scheme, the ratio of the actual return-out quality of the rock debris of the unit well depth generated in real time by the actual shaft to the calculated return-out quality can be calculated and compared with the data of the theoretical shaft, so that the accurate judgment and real-time quantitative monitoring of the stability of the actual shaft are realized.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for determining wellbore stability according to a first embodiment of the application;
FIG. 2 is a flow chart of a method for determining wellbore stability according to a second embodiment of the application;
FIG. 3 is a graph of variation of a first duty cycle and a second duty cycle with respect to well depth provided in accordance with a second embodiment of the present application;
FIG. 4 is a schematic diagram of a stability factor and a stability factor threshold according to a second embodiment of the present application;
FIG. 5 is a schematic illustration of a wellbore stability determination apparatus according to a third embodiment of the application;
fig. 6 is a schematic structural diagram of an electronic device for implementing a method for determining wellbore stability according to a fourth embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," "third," "fourth," "actual," "preset," and the like in the description and the claims of the present application and in the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a flowchart of a method for determining stability of a wellbore according to an embodiment of the present application, where the embodiment of the present application is applicable to determining stability of a wellbore. The method may be performed by a wellbore stability determination device, which may be implemented in hardware and/or software, which may be configured in an electronic apparatus. As shown in fig. 1, the method includes:
S110, determining a first duty ratio according to the actual return-out quality of rock debris of the unit well depth of the actual well bore and the calculated return-out quality.
The actual shaft is a shaft with the shaft stability to be judged, and rock debris in unit well depth can be obtained through a rock debris while-drilling monitoring device for monitoring the rock debris amount in the drilling process in real time.
In general, the rock debris while drilling amount monitoring device mainly comprises the following parts: 1. a cuttings acquisition system, which typically includes a number of specially designed coring bits or cuttings cups, is capable of collecting cuttings samples in real time during the drilling process and transporting them to the top through a pipe. 2. And the rock debris conveying pipeline is used for conveying rock debris samples from the coring bit or the rock debris cup into the shaft through the conveying pipeline and conveying the rock debris samples to the ground through a pipeline at the upper part of the shaft. 3. A rock debris receiving and analyzing system, which is arranged on the ground and is used for receiving the transmitted rock debris sample and analyzing and measuring the rock debris sample. These systems typically include equipment such as microscopes, microscopic cameras, laser particle sizers, and the like. Through the monitoring device for the rock debris while drilling, a drilling engineer can know information such as the property of a stratum, the oil and gas content condition and the like in the drilling process in real time, and make corresponding adjustment according to the analysis result of a rock debris sample.
In the embodiment of the application, the actual return quality of rock fragments in unit well depth generated in real time in the drilling process is determined through the rock fragment while drilling quantity monitor arranged at the vibrating screen of the drilling site. It can be understood that when the actual return quality is determined, professional acquisition software is also required to be utilized, and the influence of the drilling fluid quality on the actual return quality of the rock cuttings in unit well depth is eliminated by combining the data such as the dry-wet ratio of the rock cuttings, the solid phase content of the drilling fluid and the like, so that the actual return quality is restored. After the actual return quality is determined, the first duty ratio is determined according to the actual return quality of the rock debris of the unit well depth of the actual well bore and the calculated return quality, and the first duty ratio is the ratio of the actual return quality to the calculated return quality.
S120, determining a second duty ratio according to the theoretical return-out quality of rock debris in unit well depth of the theoretical shaft and calculated return-out quality; wherein the theoretical wellbore is an adjacent well to the actual wellbore.
The theoretical well bore refers to a well bore which is referred to when well bore stability of an actual well bore is judged, and is generally a well bore which is already drilled. When the theoretical shaft is selected, the shaft which is the same as the geological environment of the actual shaft is selected as the theoretical shaft, and the obtained result has more reference significance. In general, the geological environment of two adjacent wellbores are the same, so that the adjacent well of the actual wellbore can be taken as a theoretical wellbore
In the embodiment of the application, after the theoretical shaft is selected, calculating the theoretical returning mass of the rock debris in the unit well depth of the theoretical shaft according to the drilling data of the theoretical shaft, and determining the second duty ratio, namely the ratio of the theoretical returning mass to the calculated returning mass according to the theoretical returning mass of the rock debris in the unit well depth of the theoretical shaft and the calculated returning mass.
S130, determining the stability of the actual shaft according to the first duty ratio and the second duty ratio.
In the embodiment of the application, the actual shaft and the theoretical shaft can be compared according to the determined first duty ratio and the second duty ratio, namely the ratio of the actual returning mass to the calculated returning mass and the ratio of the theoretical returning mass to the calculated returning mass, so that the stability of the actual shaft is determined.
Optionally, determining the stability of the actual wellbore based on the first and second duty cycles comprises:
normalizing the first duty ratio and the second duty ratio to obtain normalized parameters;
and determining the stability of the actual shaft according to the normalized parameters.
Wherein the normalization parameter can be used for representing the similarity degree between the first duty ratio and the second duty ratio, and the value range is 0-1. It will be appreciated that the greater the value of the normalization parameter in the interval 0-1, the higher the degree of similarity of the two, and vice versa. Thus, the first preset threshold and the second preset threshold may be set in advance to determine the stability of the actual wellbore. The first preset threshold value is larger than the second preset threshold value, and when the normalized parameter is larger than the first preset threshold value, the stability of the actual shaft is good; when the normalized parameter is smaller than the first preset threshold value and larger than the second preset threshold value, the stability of the actual shaft is poor; and when the normalized parameter is smaller than a second preset threshold value, the stability of the actual shaft is abnormal. The magnitudes of the first preset threshold and the second preset threshold can be adjusted correspondingly according to actual conditions.
According to the technical scheme, the first duty ratio is determined according to the actual returning quality of rock debris in unit well depth of an actual shaft and calculated returning quality; determining a second duty ratio according to the theoretical return-out quality of the rock debris of the unit well depth of the theoretical shaft and the calculated return-out quality; wherein the theoretical wellbore is an adjacent well to the actual wellbore; the stability of the actual wellbore is determined based on the first duty cycle and the second duty cycle. Through the scheme, the ratio of the actual return-out quality of the rock debris of the unit well depth generated in real time by the actual shaft to the calculated return-out quality can be calculated and compared with the data of the theoretical shaft, so that the accurate judgment and real-time quantitative monitoring of the stability of the actual shaft are realized.
Example two
Fig. 2 is a flowchart of a method for determining wellbore stability according to a second embodiment of the present application, where the method is optimized based on the above embodiment, and a scheme not described in detail in the embodiment of the present application is shown in the above embodiment. As shown in fig. 2, the method in the embodiment of the present application specifically includes the following steps:
s210, obtaining actual returning quality of rock debris per unit well depth obtained by weighing the rock debris returned from different reservoirs of the actual well bore in the drilling process.
In the embodiment of the application, the rock cuttings returned in the drilling process of different reservoirs of an actual shaft can be obtained through the rock cuttings while drilling quantity monitor, and the rock cuttings are weighed to obtain the actual returned quality of the rock cuttings of the actual shaft in unit well depth.
Optionally, before weighing the rock debris, further comprising: and professional acquisition software is utilized, and the influence of the quality of the drilling fluid on the actual return quality of the rock cuttings in unit well depth is eliminated by combining the data such as the dry-wet ratio of the rock cuttings, the solid phase content of the drilling fluid and the like. Thus, the actual return quality of the rock debris per unit well depth can be obtained.
S220, determining the calculated return mass of the rock cuttings in the unit well depth according to the diameter of the drill bit used for drilling the actual well bore and the rock cuttings density of the actual well bore.
In the embodiment of the application, after the diameter of the drill bit used for drilling the actual shaft and the rock debris density of the actual shaft are determined, the calculated return mass of the rock debris in unit well depth can be determined.
Specifically, the determination process of calculating the return quality includes:
determining the cross-sectional area of the actual shaft according to the diameter of a drill bit used for drilling the actual shaft;
determining the actual pit shaft rock debris volume of the unit pit depth according to the product of the actual pit shaft cross-sectional area and the unit pit depth;
and determining and calculating the return mass according to the actual rock debris volume of the shaft and the rock debris density of the actual shaft.
In the embodiment of the application, after the diameter of the drill bit and the rock debris density are obtained, the calculated return mass can be determined by the following formula: the calculation formula of the actual shaft cross-sectional area is: the calculation formula of the actual pit shaft rock debris volume per unit well depth is as follows: The calculation formula for calculating the return mass is: *。
Wherein, Is the actual cross-sectional area of the shaft in units of。The diameter of a drill bit used to drill an actual wellbore is in mm.Actual wellbore cuttings volume in units of well depth in units of。For calculation of the return mass, the unit is kg.Is the cuttings density of the actual wellbore in kg +.。
S230, determining a first duty ratio according to the actual return quality and the calculated return quality.
In the embodiment of the application, the first duty ratio can be determined according to the determined actual returning quality of the rock debris with unit well depth and the calculated returning quality, and the first duty ratio is the ratio of the actual returning quality to the calculated returning quality. The calculation formula of the first duty ratio is as follows: Wherein, the method comprises the steps of, wherein, At the first duty cycle of the first power supply,In order to actually return the quality out of the way,The return mass is calculated.
S240, determining the theoretical return mass of the rock debris in the unit well depth according to the well diameter of the theoretical well bore and the rock debris density.
In the embodiment of the application, after the well diameter and the rock debris density of the theoretical shaft are determined, the theoretical return quality of the rock debris in unit well depth can be determined.
Specifically, the theoretical return quality determination process includes:
determining the cross-sectional area of the theoretical shaft according to the well diameter of the theoretical shaft, and determining the rock debris volume of the theoretical shaft in unit well depth according to the product of the cross-sectional area of the theoretical shaft and the unit well depth;
And determining theoretical return mass according to the theoretical pit shaft rock debris volume and the rock debris density of the theoretical pit shaft.
In the embodiment of the application, when the well diameter and the rock debris density of the theoretical shaft are obtained, the theoretical return mass can be determined by the following formula: the calculation formula of the theoretical shaft cross-sectional area is: the calculation formula of the actual pit shaft rock debris volume per unit well depth is as follows: the calculation formula of the theoretical return mass is: *。
Wherein, Is the theoretical shaft cross-sectional area in units of。The well diameter of a theoretical wellbore is in mm.Theoretical wellbore cuttings volume in units of well depth in units of。The theoretical return mass is given in kg.Is the cuttings density of the theoretical wellbore in kg +.。
S250, determining a second duty ratio according to the theoretical return-out quality and the calculated return-out quality.
In the embodiment of the application, the second duty ratio can be determined according to the determined theoretical returning quality of the rock debris with unit well depth and the calculated returning quality, and the second duty ratio is the ratio of the theoretical returning quality to the calculated returning quality. The calculation formula of the second duty ratio is as follows: Wherein, the method comprises the steps of, wherein, At the second duty cycle of the first and second power,For the theoretical return-out quality of the product,The return mass is calculated.
And S260, determining a deviation value of the first duty ratio and the second duty ratio as a stability coefficient.
Wherein the deviation value is used for representing the similarity degree between the first duty ratio and the second duty ratio, and the larger the deviation value is, the lower the similarity degree between the first duty ratio and the second duty ratio is, and the higher the similarity degree between the first duty ratio and the second duty ratio is, otherwise. The degree of similarity between the first duty ratio and the second duty ratio can reflect the stability of an actual shaft, and the higher the degree of similarity, the better the stability, and the worse the stability. Thus, the stability of the actual wellbore may be determined using the deviation value as a stability factor.
Specifically, determining a deviation value of the first duty cycle from the second duty cycle as a stability factor includes:
The difference between the first and second duty cycles, or the ratio of the first and second duty cycles, is used as the stability factor.
In the embodiment of the present application, when the difference between the first duty ratio and the second duty ratio is taken as the stability coefficient, r=Wherein r is the stability coefficient,At the first duty cycle of the first power supply,Is a second duty cycle. The smaller the value of r, the better the stability of the actual wellbore. When the ratio of the first duty ratio to the second duty ratio is used as the stability factor, r=The closer the value of r is to1, the better the stability of the actual wellbore.
It will be appreciated that the first and second duty cycles used in the calculation should correspond to the same well depth, whether the difference between the first and second duty cycles is used as a stability factor or the ratio of the first and second duty cycles is used as a stability factor. In an actual drilling operation, a profile of the first and second duty cycles with respect to well depth may be obtained.
Illustratively, fig. 3 shows a graph of the variation of the first and second duty cycles with respect to well depth, as shown by the X-axis representing well depth and the Y-axis representing the value of the duty cycle, where the dashed line is the first duty cycle and the solid line is the second duty cycle.
S270, determining the stability of the actual shaft according to the comparison result of the stability coefficient and the stability coefficient threshold.
In the embodiment of the application, after the stability coefficient is obtained, the stability coefficient can be compared with the stability coefficient threshold value set in advance, and the stability of the actual shaft is determined according to the comparison result of the stability coefficient and the stability coefficient threshold value, so that the accurate judgment and real-time quantitative monitoring of the stability of the actual shaft are realized.
Taking the difference between the first duty cycle and the second duty cycle as a stability factor for illustration, optionally, determining the stability of the actual wellbore according to the comparison between the stability factor and the stability factor threshold comprises:
if the stability coefficient is smaller than the first stability coefficient threshold value, determining that the stability of the actual shaft is good;
if the stability coefficient is greater than the first stability coefficient threshold and less than the second stability coefficient threshold, determining that the stability of the actual wellbore is poor;
If the stability coefficient is greater than the second stability coefficient threshold, determining that the stability of the actual well bore is abnormal;
wherein the second stability factor threshold is greater than the first stability factor threshold.
In the embodiment of the application, when the difference between the first duty ratio and the second duty ratio is taken as the stability coefficient, the smaller the value of r is, the better the stability of the actual shaft is. At this point, the first stability factor threshold represents a demarcation between good and poor, while the second stability factor threshold represents a demarcation between poor and abnormal, and the stability of the actual wellbore can be determined by comparing the stability factor to the stability factor threshold. It can be understood that, regarding the number of stability coefficient thresholds, the number may be set according to the actual situation, for example, 3 stability coefficient thresholds are set, so as to divide the stability of the actual wellbore into four areas of good, poor and abnormal.
By way of example, fig. 4 shows a schematic diagram of a stability factor versus a stability factor threshold, as shown, with the X-axis representing well depth, the Y-axis representing the value of the stability factor,For the first stability factor threshold, indicated by the lower dashed line in the figure,The second stability factor threshold is shown by the upper dashed line and the solid line shows the stability factor. The portion of the solid line below the lower broken line in the figure represents that the stability of the actual wellbore is good, the portion located between the two broken lines represents that the stability of the actual wellbore is poor, and the portion located above the upper broken line represents that the stability of the actual wellbore is abnormal.
The embodiment of the application provides a method for determining the stability of a shaft, which is used for acquiring the actual returning quality of rock fragments with unit well depth, which is obtained by weighing the rock fragments returned from different reservoirs of an actual shaft in the drilling process; determining the calculated return mass of rock debris in unit well depth according to the diameter of a drill bit used for drilling an actual well bore and the rock debris density of the actual well bore; determining a first duty ratio according to the actual return-out quality and the calculated return-out quality; determining the theoretical return mass of the rock debris in unit well depth according to the well diameter and the rock debris density of the theoretical well bore; determining a second duty cycle according to the theoretical return-out mass and the calculated return-out mass; determining a deviation value of the first duty ratio and the second duty ratio as a stability coefficient; and determining the stability of the actual shaft according to the comparison result of the stability coefficient and the stability coefficient threshold value. Through the scheme, the ratio of the actual return-out quality of the rock debris of the unit well depth generated in real time by the actual shaft to the calculated return-out quality can be calculated and compared with the data of the theoretical shaft, so that the accurate judgment and real-time quantitative monitoring of the stability of the actual shaft are realized.
Example III
Fig. 5 is a schematic structural diagram of a wellbore stability determining device according to a third embodiment of the present application, where the device may perform the wellbore stability determining method according to any embodiment of the present application, and the device has functional modules and beneficial effects corresponding to the performing method. As shown in fig. 5, the apparatus includes:
A first duty ratio determining module 310, configured to determine a first duty ratio according to an actual return mass of rock debris of a unit well depth of an actual wellbore and a calculated return mass;
A second duty ratio determining module 320, configured to determine a second duty ratio according to a theoretical return quality of the rock debris of the unit well depth of the theoretical wellbore and the calculated return quality; wherein the theoretical wellbore is an adjacent well to the actual wellbore;
a stability determination module 330 is configured to determine stability of the actual wellbore based on the first duty cycle and the second duty cycle.
In an embodiment of the present application, the first duty ratio determining module 310 includes:
the actual return quality determining unit is used for obtaining the actual return quality of rock debris in unit well depth obtained by weighing the rock debris returned from different reservoirs of the actual well bore in the drilling process;
a calculated return quality determination unit configured to determine a calculated return quality of rock debris per unit well depth based on a diameter of a drill bit used for drilling the actual wellbore and a rock debris density of the actual wellbore;
And the first duty ratio determining unit is used for determining the first duty ratio according to the actual returning quality and the calculated returning quality.
In an embodiment of the present application, the second duty ratio determining module 320 includes:
a theoretical return quality determining unit for determining theoretical return quality of the rock debris per unit well depth according to the well diameter of the theoretical well bore and the rock debris density;
And the second duty ratio determining unit is used for determining the second duty ratio according to the theoretical returning quality and the calculated returning quality.
Optionally, the calculation return quality determining unit includes:
an actual wellbore cross-sectional area determination subunit configured to determine the actual wellbore cross-sectional area according to a diameter of a drill bit employed to drill the actual wellbore;
An actual shaft cuttings volume determining subunit, configured to determine an actual shaft cuttings volume of a unit well depth according to a product of an actual shaft cross-sectional area and the unit well depth;
a calculated return quality determination subunit for determining the calculated return quality from the actual wellbore cuttings volume and the actual wellbore cuttings density.
Alternatively, the theoretical return quality determination unit includes:
A theoretical shaft rock debris volume determining subunit, configured to determine a theoretical shaft cross-sectional area according to a borehole diameter of a theoretical shaft, and determine a theoretical shaft rock debris volume of a unit borehole depth according to a product of the theoretical shaft cross-sectional area and the unit borehole depth;
a theoretical return mass determination subunit for determining the theoretical return mass from the theoretical wellbore cuttings volume and the cuttings density of the theoretical wellbore.
In an embodiment of the present application, the stability determining module 330 includes:
A stability coefficient determining unit configured to determine a deviation value of the first duty ratio from the second duty ratio as a stability coefficient;
and the stability determining unit is used for determining the stability of the actual shaft according to the comparison result of the stability coefficient and the stability coefficient threshold value.
Optionally, the stability coefficient determining unit is specifically configured to:
And taking the difference value between the first duty ratio and the second duty ratio or the ratio of the first duty ratio to the second duty ratio as the stability coefficient.
The well bore stability determining device provided by the embodiment of the application can execute the well bore stability determining method provided by any embodiment of the application, and has the corresponding functional modules and beneficial effects of the executing method.
Example IV
Fig. 6 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the application. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the applications described and/or claimed herein.
As shown in fig. 6, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as wellbore stability determination methods.
In some embodiments, the wellbore stability determination method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. One or more of the steps of the wellbore stability determination methods described above may be performed when the computer program is loaded into RAM 13 and executed by processor 11. Alternatively, in other embodiments, the processor 11 may be configured to perform the wellbore stability determination method in any other suitable manner (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable wellbore stability determination device such that the computer programs, when executed by the processor, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present application, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present application may be executed in parallel, sequentially, or in a different order, so long as the information desired by the technical solution of the present application can be achieved, and the present application is not limited herein.
The above embodiments do not limit the scope of the present application. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of the present application.
Claims (9)
1. A method of wellbore stability determination, the method comprising:
Determining a first duty ratio according to the actual return-out quality of rock debris of the unit well depth of the actual well bore and the calculated return-out quality; the first duty ratio is a ratio of the actual returning mass to the calculated returning mass, and a calculation formula for calculating the returning mass is as follows: m Calculation of ＝ρ Actual practice is that of *V Calculation of ; wherein m Calculation of is calculated return mass, V Calculation of is actual pit shaft cuttings volume per unit well depth, and ρ Actual practice is that of is cuttings density of the actual pit shaft;
Determining a second duty ratio according to the theoretical return-out quality of the rock debris of the unit well depth of the theoretical shaft and the calculated return-out quality; the second duty ratio is a ratio of the theoretical returning mass to the calculated returning mass, the theoretical wellbore is an adjacent well of the actual wellbore, the theoretical returning mass is the calculated returning mass of rock debris in unit well depth of the theoretical wellbore, and a calculation formula of the theoretical returning mass is as follows:
m Theory of ＝ρ Theory of *V Theory of ; wherein m Theory of is theoretical return mass, V Theory of is theoretical pit shaft cuttings volume per unit well depth, and ρ Theory of is the cuttings density of the theoretical pit shaft;
Determining a stability of the actual wellbore based on the first and second duty cycles;
determining stability of the actual wellbore from the first and second duty cycles, comprising:
Determining a deviation value of the first duty ratio and the second duty ratio as a stability coefficient;
and determining the stability of the actual shaft according to the comparison result of the stability coefficient and the stability coefficient threshold value.
2. The method of claim 1, wherein determining the first duty cycle based on the actual return mass of cuttings per well depth of the actual wellbore and the calculated return mass comprises:
Obtaining actual returning quality of rock debris of unit well depth obtained by weighing rock debris returned from different reservoirs of an actual well bore in the drilling process;
Determining the calculated return mass of the rock cuttings in the unit well depth according to the diameter of a drill bit used for drilling the actual well bore and the rock cuttings density of the actual well bore;
And determining the first duty ratio according to the actual return-out quality and the calculated return-out quality.
3. The method of claim 1, wherein determining the second duty cycle based on the theoretical return mass of the cuttings per well depth of the theoretical wellbore and the calculated return mass comprises:
Determining the theoretical return mass of the rock debris in unit well depth according to the well diameter and the rock debris density of the theoretical well bore;
And determining the second duty ratio according to the theoretical return-out quality and the calculated return-out quality.
4. The method of claim 2, wherein the determining of the calculated return quality comprises:
Determining the cross-sectional area of the actual shaft according to the diameter of a drill bit used for drilling the actual shaft;
determining the actual pit shaft rock debris volume of the unit pit depth according to the product of the actual pit shaft cross-sectional area and the unit pit depth;
and determining the calculated return mass according to the actual rock debris volume of the shaft and the rock debris density of the actual shaft.
5. A method according to claim 3, wherein the theoretical return quality determination comprises:
Determining the cross-sectional area of a theoretical shaft according to the well diameter of the theoretical shaft, and determining the rock debris volume of the theoretical shaft in unit well depth according to the product of the cross-sectional area of the theoretical shaft and the unit well depth;
and determining the theoretical return mass according to the theoretical pit shaft rock debris volume and the rock debris density of the theoretical pit shaft.
6. The method of claim 1, wherein determining the deviation value of the first duty cycle from the second duty cycle as a stability factor comprises:
And taking the difference value between the first duty ratio and the second duty ratio or the ratio of the first duty ratio to the second duty ratio as the stability coefficient.
7. A wellbore stability determination apparatus, the apparatus comprising:
The first duty ratio determining module is used for determining a first duty ratio according to the actual returning quality of rock debris in unit well depth of an actual shaft and the calculated returning quality; the first duty ratio is a ratio of the actual returning mass to the calculated returning mass, and a calculation formula of the calculated returning mass is as follows: m Calculation of ＝ρ Actual practice is that of *V Calculation of ; wherein m Calculation of is calculated return mass, V Calculation of is actual pit shaft cuttings volume per unit well depth, and ρ Actual practice is that of is cuttings density of the actual pit shaft;
The second duty ratio determining module is used for determining a second duty ratio according to the theoretical returning quality of rock debris in unit well depth of the theoretical shaft and the calculated returning quality; the second duty ratio is a ratio of the theoretical returning mass to the calculated returning mass, the theoretical wellbore is an adjacent well of the actual wellbore, the theoretical returning mass is the calculated returning mass of rock debris in unit well depth of the theoretical wellbore, and a calculation formula of the theoretical returning mass is as follows: m Theory of ＝ρ Theory of *V Theory of ; wherein m Theory of is theoretical return mass, V Theory of is theoretical pit shaft cuttings volume per unit well depth, and ρ Theory of is the cuttings density of the theoretical pit shaft;
A stability determination module configured to determine a stability of the actual wellbore based on the first duty cycle and the second duty cycle;
The stability determination module includes:
A stability coefficient determining unit configured to determine a deviation value of the first duty ratio from the second duty ratio as a stability coefficient;
and the stability determining unit is used for determining the stability of the actual shaft according to the comparison result of the stability coefficient and the stability coefficient threshold value.
8. An electronic device, the device comprising:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the wellbore stability determination method of any of claims 1-6.
9. A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, the computer instructions for causing a processor to perform the wellbore stability determination method of any of claims 1-6.
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