Drilling fluid circulation time prediction method, system and equipment based on aftereffect data

Abstract

The invention belongs to the field of petroleum and natural gas engineering, particularly relates to a drilling fluid circulation time prediction method, system and equipment based on aftereffect data, and aims to solve the problem that in the prior art, decisions on whether drilling is recovered or circulation is continued or circulation is continued cannot be made in time. The method comprises the following steps: judging whether to detect the gas logging aftereffect reaction or not according to drilling parameters; judging whether a gas detection aftereffect reaction occurs or not; if so; obtaining a well logging map, and determining an aftereffect mode in combination with a pre-constructed aftereffect mode judgment method; and based on a pre-constructed drilling fluid cycle period table, matching the aftereffect mode to obtain the cycle period of the drilling fluid. According to the method, the problem that the drilling fluid circulation cycle number cannot be determined after the aftereffect occurs is well solved, and an optimal solution is provided for ensuring the gas logging data quality, the drilling time efficiency and the well control safety.

Description

Background Art

[0003] The higher the formation pressure and the longer the drilling fluid is static, the more active the aftereffect reaction is and the longer it lasts. Under the ground circulation conditions, it is impossible to completely exhaust the aftereffect gas in the drilling fluid. Some oil and gas will still be dissolved in the drilling fluid. This part of the drilling fluid containing oil and gas is pumped into the well again. Since the density of oil and gas in this part of the drilling fluid is relatively low, there will be an instantaneous negative pressure when passing through the oil and gas layer. The formation oil and gas will invade the drilling fluid again and overlap with the original oil and gas. After circulating to the ground, it will be detected by the gas detector again. This is called the second week of aftereffect. Similarly, there will be three weeks, four weeks, etc.

[0004] According to the logging specifications, normal drilling can only be carried out when the two-week and three-week after-effect values ​​are twice lower than the background value. Otherwise, if drilling is resumed, the two-week and three-week after-effect values ​​will fall on the footage, resulting in false display and misleading oil and gas layer evaluation. Therefore, it is necessary to continuously circulate the air until the after-effect value reaches the standard before drilling can begin.

[0005] The circulation time of drilling fluid in ultra-deep wells is very long. For example, when the after-effect was measured at a depth of 7125m in Well HT101, it took about 8 hours to circulate the drilling fluid for one week. Too many cycles will reduce the drilling time and increase the cost. At the same time, too high two-week and three-week after-effect will also bring well control risks. Based on the total hydrocarbon value, duration and other parameters of the measured after-effect, the reaction of the after-effect in the next week can be predicted in advance, providing a key decision basis for whether to continue circulation or drilling.

[0006] Based on this, the present invention proposes a method, system and equipment for predicting drilling fluid circulation time based on aftereffect data. Summary of the invention

[0007] In order to solve the above-mentioned problems in the prior art, that is, the prior art is unable to predict in advance the reaction of the aftereffect next week based on the total hydrocarbon value, duration and other parameters of the measured aftereffect, and is unable to provide a key decision basis for whether to continue circulation or drilling, and thus is unable to make timely decisions on whether to resume drilling, continue circulation, and how many weeks to circulate, the present invention provides a drilling fluid circulation time prediction method, system and equipment based on aftereffect data.

[0008] On one hand, the present invention provides a method for predicting the circulation time of drilling fluid based on aftereffect data, which is used to obtain the circulation period of drilling fluid according to the degree and high value duration of the gas test aftereffect reaction when the gas test aftereffect reaction is detected during the drilling process. The method comprises the following steps:

[0009] Step S10, judging whether to perform gas testing after-effect reaction detection according to the drilling parameters; if so, judging whether gas testing after-effect reaction occurs based on the static time of the drilling fluid and the concentration of the gas detected by the gas detector; if it occurs, jumping to step S20;

[0010] Step S20, obtaining a well logging diagram, and obtaining a total hydrocarbon curve on the well logging diagram; obtaining an after-effect total hydrocarbon value and a total hydrocarbon duration according to the total hydrocarbon curve, and determining an after-effect mode in combination with a pre-constructed after-effect mode judgment method;

[0011] Step S30, matching the aftereffect pattern based on the pre-constructed drilling fluid circulation period table to obtain the circulation period of the drilling fluid;

[0012] The pre-constructed drilling fluid circulation period table is a mapping relationship between a preset after-effect mode and a set drilling fluid circulation period.

[0013] In some preferred embodiments, the after-effect total hydrocarbon value is the peak value of the total hydrocarbon curve.

[0014] In some preferred embodiments, the total hydrocarbon duration is the time between the half-width points of the total hydrocarbon curve.

[0015] In some preferred embodiments, the pre-constructed aftereffect mode determination method is:

[0016] When the after-effect total hydrocarbon value is greater than a%, and the total hydrocarbon duration is greater than a first preset time, the after-effect mode is a high total hydrocarbon, long duration mode;

[0017] When the after-effect total hydrocarbon value is between b% and a%, and the total hydrocarbon duration is less than the first preset time, the after-effect mode is a high-value total hydrocarbon and short duration mode;

[0018] When the after-effect total hydrocarbon value is less than b%, and the total hydrocarbon duration is greater than the first preset time, the after-effect mode is a low total hydrocarbon, long duration mode.

[0019] In some preferred embodiments, the pre-constructed drilling fluid circulation periodic table is:

[0020] When the after-effect mode is a high total hydrocarbon and long duration mode, the drilling fluid circulates for at least c weeks;

[0021] When the after-effect mode is a high-value full hydrocarbon and short-duration mode, the drilling fluid circulates for d weeks;

[0022] When the after-effect mode is a low total hydrocarbon and long duration mode, the drilling fluid circulates for d weeks.

[0023] In some preferred embodiments, after the drilling fluid has circulated for d weeks or at least c weeks, the after-effect total hydrocarbon value is twice lower than the background value.

[0024] In a second aspect, the present invention provides a drilling fluid circulation time prediction system based on aftereffect data, based on a drilling fluid circulation time prediction method based on aftereffect data, the system comprising:

[0025] The gas testing after-effect reaction judgment module is configured to judge whether to perform gas testing after-effect reaction detection according to the drilling parameters; if so, judge whether gas testing after-effect reaction occurs based on the static time of the drilling fluid and the concentration of the gas detected by the gas detector; if it occurs, jump to the after-effect mode judgment module;

[0026] An after-effect mode judgment module is configured to obtain a well logging diagram, obtain a total hydrocarbon curve on the well logging diagram; obtain an after-effect total hydrocarbon value and a total hydrocarbon duration according to the total hydrocarbon curve, and determine the after-effect mode in combination with a pre-constructed after-effect mode judgment method;

[0027] A cycle determination module configured to match the aftereffect pattern based on a pre-constructed drilling fluid cycle table to obtain a cycle of the drilling fluid;

[0028] The pre-constructed drilling fluid circulation period table is a mapping relationship between a preset after-effect mode and a set drilling fluid circulation period.

[0029] According to a third aspect of the present invention, an electronic device is provided, comprising:

[0030] at least one processor; and

[0031] a memory communicatively connected to at least one of the processors; wherein,

[0032] The memory stores instructions that can be executed by the processor, and the instructions are used to be executed by the processor to implement a drilling fluid circulation time prediction method based on aftereffect data.

[0033] In a fourth aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to be executed by the computer to implement a drilling fluid circulation time prediction method based on aftereffect data.

[0034] Beneficial effects of the present invention:

[0035] The invention discloses a method for predicting the circulation time of drilling fluid based on gas logging aftereffect data, which is divided into three modes according to the degree and duration of gas logging aftereffect reaction. In the high total hydrocarbon and long duration mode, the drilling fluid circulates for three weeks, and in the high-value total hydrocarbon and short duration mode for at least two weeks, the drilling fluid circulates for one week; in the low total hydrocarbon and long duration mode, the drilling fluid circulates for one week. The present invention solves the problem that the number of drilling fluid circulation weeks cannot be determined after the occurrence of aftereffects, and provides an optimal solution in ensuring the quality of gas logging data, drilling timeliness and well control safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0037] Figure 1 It is a flow chart of a method for predicting drilling fluid circulation time based on aftereffect data of the present invention;

[0038] Figure 2 The present invention provides a drilling fluid circulation time prediction method based on aftereffect data;

[0039] Figure 3 The present invention provides a drilling fluid circulation time prediction method based on aftereffect data;

[0040] Figure 4 It is a schematic diagram of characteristic curves of gas logging parameters in a low total hydrocarbon and long duration mode of a drilling fluid circulation time prediction method based on aftereffect data of the present invention;

[0041] Figure 5 It is a structural diagram of a computer system of a server for implementing the method, system, and device embodiments of the present application. DETAILED DESCRIPTION

[0042] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] The first embodiment of the present invention, see Figure 1-Figure 4, provides a drilling fluid circulation time prediction method based on aftereffect data, which is used to obtain the circulation period of drilling fluid according to the degree and high value duration of gas testing aftereffect reaction when gas testing aftereffect reaction is detected during drilling. The method comprises the following steps:

[0045] Step S10, judging whether to perform gas testing after-effect reaction detection according to the drilling parameters; if so, judging whether gas testing after-effect reaction occurs based on the static time of the drilling fluid and the concentration of the gas detected by the gas detector; if it occurs, jumping to step S20;

[0046] Step S20, obtaining a well logging diagram, and obtaining a total hydrocarbon curve on the well logging diagram; obtaining an after-effect total hydrocarbon value and a total hydrocarbon duration according to the total hydrocarbon curve, and determining an after-effect mode in combination with a pre-constructed after-effect mode judgment method;

[0047] Step S30, matching the aftereffect pattern based on the pre-constructed drilling fluid circulation period table to obtain the circulation period of the drilling fluid;

[0048] The pre-constructed drilling fluid circulation period table is a mapping relationship between a preset after-effect mode and a set drilling fluid circulation period.

[0049] Preferably, the after-effect total hydrocarbon value is the peak value of the total hydrocarbon curve.

[0050] Preferably, the total hydrocarbon duration is the time between the half-width points of the total hydrocarbon curve.

[0051] Preferably, the pre-constructed aftereffect mode determination method is:

[0052] When the after-effect total hydrocarbon value is greater than a%, and the total hydrocarbon duration is greater than a first preset time, the after-effect mode is a high total hydrocarbon, long duration mode;

[0053] When the after-effect total hydrocarbon value is between b% and a%, and the total hydrocarbon duration is less than the first preset time, the after-effect mode is a high-value total hydrocarbon and short duration mode;

[0054] When the after-effect total hydrocarbon value is less than b%, and the total hydrocarbon duration is greater than the first preset time, the after-effect mode is a low total hydrocarbon, long duration mode.

[0055] Among them, a is preferably 50, b is 30, and the first preset time is 30 minutes.

[0056] Preferably, the pre-constructed drilling fluid circulation periodic table is:

[0057] When the after-effect mode is a high total hydrocarbon and long duration mode, the drilling fluid circulates for at least c weeks;

[0058] When the after-effect mode is a high-value full hydrocarbon and short-duration mode, the drilling fluid circulates for d weeks;

[0059] When the after-effect mode is a low total hydrocarbon and long duration mode, the drilling fluid circulates for d weeks.

[0060] Among them, c is 2 and d is 1.

[0061] For excellent drilling, after the drilling fluid has circulated for d weeks or at least c weeks, the after-effect total hydrocarbon value is twice lower than the background value.

[0062] Figure 2 Chinese: 1. After-effect display; 2. After-effect for two weeks; 3. After-effect for three weeks; 4. Half-width point; 5. Drilling pressure, rotary table speed, drilling time; 6. 3# pump stroke, riser pressure, outlet flow rate; 7. Outlet density, outlet temperature, outlet conductivity; 8. Drilling pressure, rotary table speed, drilling time; 9. 3# pump stroke, riser pressure, outlet flow rate; 10. Outlet density, outlet temperature, outlet conductivity; 11. Drilling pressure, rotary table speed, drilling time; 12. 3# pump stroke, riser pressure, outlet flow rate; 13. Outlet density, outlet temperature, outlet conductivity; 14. Oil and gas display.

[0063] High total hydrocarbon, long duration mode example, Figure 2 This is the well logging diagram of Well XH11-4 in LH Depression.

[0064] When drilling to 5908.95m, the drill was started and the aftereffect was measured. The drilling fluid was static for 33.67 hours and a very active aftereffect reaction was observed.

[0065] Determine the aftereffect pattern

[0066] (1) Determine the total hydrocarbon peak. The total hydrocarbon display starts at 07:00 on July 25, 2022, and reaches the maximum value of 100% at 07:25. The total hydrocarbon peak is 100%, such as Figure 2 As shown in 1.

[0067] (2) Determine the duration of the high value. The time between the half-amplitude points of all hydrocarbons is 33 minutes. The duration of the high value is 33 minutes. Figure 2 As shown in Figure 4.

[0068] (3) Determine the aftereffect mode. The total hydrocarbon peak is 100%, and the high value lasts for 33 minutes, which belongs to the high total hydrocarbon and long duration mode.

[0069] Determine the number of cycles. The aftereffect belongs to the high total hydrocarbon and long duration mode, and the drilling fluid circulates for three cycles.

[0070] (1) Figure 2As shown in Figure 2, it is the second week after the effect, the total hydrocarbon peak is 30.5%, the background value is 1.0%, and the second week after the effect value is much higher than the background value. The drilling pressure, rotary speed, and drilling time are all zero. Figure 2 As shown in 5, 3# pump stroke, standpipe pressure, and outlet flow rate all have values, such as Figure 2 As shown in 6; the outlet density, outlet temperature, and outlet conductivity all have values, such as Figure 2 As shown in Figure 7. From the above parameter characteristics, it can be seen that the drilling fluid is in the circulating state at this time and drilling has not been resumed.

[0071] (2) Figure 2 As shown in Figure 3, it is the third week of aftereffect, the total hydrocarbon peak is 5.8%, the background value is 1.0%, and the value of the second week of aftereffect is higher than the background value. The drilling pressure, rotary speed, and drilling time are all zero. Figure 2 As shown in 8, 3# pump stroke, standpipe pressure, and outlet flow rate all have values, such as Figure 2 As shown in 9; the outlet density, outlet temperature, and outlet conductivity all have values, such as Figure 2 As shown in Figure 10. From the above parameter characteristics, it can be seen that the drilling fluid is in the circulating state at this time and drilling has not been resumed.

[0072] (3) After three weeks of testing, drilling was resumed at 15:00 and oil and gas were found, with a total hydrocarbon value of 9.6%. Figure 2 As shown in Figure 14. The drilling pressure, rotary table speed, and drilling time all have values, such as Figure 2 As shown in 11, 3# pump stroke, standpipe pressure, and outlet flow rate all have values, such as Figure 2 As shown in 12; the outlet density, outlet temperature, and outlet conductivity all have values, such as Figure 2 As shown in Figure 13. It can be seen from the above parameter characteristics that it is in the drilling state at this time.

[0073] Figure 3 Middle: 1. After-effect display; 2. After-effect two weeks; 3. Half-width point; 4. Drilling pressure, rotary table speed, drilling time; 5. 1# pump stroke, riser pressure, outlet flow rate; 6. Outlet density, outlet temperature, outlet conductivity; 7. Drilling pressure, rotary table speed, drilling time; 8. 1# pump stroke, riser pressure, outlet flow rate; 9. Outlet density, outlet temperature, outlet conductivity.

[0074] High value full hydrocarbon, short duration mode example, Figure 3 This is the well logging diagram of Well XH21 in LH Depression.

[0075] When drilling to 6603.88m, the drill was started and the aftereffect was measured. The drilling fluid was static for 61.9 hours and a relatively active aftereffect reaction was observed.

[0076] Determine the aftereffect pattern

[0077] (1) Determine the total hydrocarbon peak. The total hydrocarbon display began to appear at 14:10 on October 16, 2022, and reached a maximum value of 66.3% at 14:24. The total hydrocarbon peak value of 66.3% is as follows: Figure 3 As shown in 1.

[0078] (2) Determine the duration of the high value. The time between the half-amplitude points of all hydrocarbons is 22 minutes. The duration of the high value is 22 minutes. Figure 1 As shown in 3.

[0079] (3) Determine the aftereffect mode. The total hydrocarbon peak is 66.3%, and the high value lasts for 220 minutes, which belongs to the high total hydrocarbon and short duration mode.

[0080] Determine the number of cycles. The aftereffect belongs to the high total hydrocarbon and short duration mode, and the drilling fluid circulates for one cycle.

[0081] (1) After the measurement, drilling was resumed at 15:07. The drilling pressure, rotary table speed, and drilling time all have values, such as Figure 3 As shown in 4, 1# pump stroke, standpipe pressure, and outlet flow rate all have values, such as Figure 3 As shown in 5; the outlet density, outlet temperature, and outlet conductivity all have values, such as Figure 3 As shown in Figure 6. It can be seen from the above parameter characteristics that it is in the drilling state at this time.

[0082] (2) Figure 3 As shown in 2, it is the position where the aftereffect of two weeks should appear. The total hydrocarbon peak is 1.2%, the background value is 0.8%, and the aftereffect of two weeks is twice the background value, which has basically no effect on gas logging. Here, the drilling pressure, rotary speed, and drilling time all have values, such as Figure 3 As shown in 7, 1# pump stroke, standpipe pressure, and outlet flow rate all have values, such as Figure 3 As shown in 8; the outlet density, outlet temperature, and outlet conductivity all have values, such as Figure 3 As shown in Figure 9. It can be seen from the above parameter characteristics that it is in the drilling state at this time.

[0083] Figure 4 Middle: 1. After-effect display; 2. After-effect two weeks; 3. Half-width point; 4. Drilling pressure, rotary table speed, drilling time; 5. 1# pump stroke, riser pressure, outlet flow rate; 6. Outlet density, outlet temperature, outlet conductivity; 7. Drilling pressure, rotary table speed, drilling time; 8. 1# pump stroke, riser pressure, outlet flow rate; 9. Outlet density, outlet temperature, outlet conductivity.

[0084] Low value total hydrocarbon, long duration mode example, Figure 4 This is the well logging diagram of AT1-5 well in LG Depression.

[0085] When drilling to 4285.49m, the drill was started and the aftereffect was measured. The drilling fluid was static for 37.12 hours and a relatively active aftereffect reaction was observed.

[0086] Determine the aftereffect pattern

[0087] (1) Determine the total hydrocarbon peak. The total hydrocarbon display began to appear at 16:10 on April 5, 2023, and reached a maximum value of 29.6% at 16:43. The total hydrocarbon peak value is 29.6%, such as Figure 4 As shown in 1.

[0088] (2) Determine the duration of the high value. The time between the half-amplitude points of all hydrocarbons is 35 minutes. The duration of the high value is 35 minutes. Figure 1 As shown in 3.

[0089] (3) Determine the aftereffect mode. The total hydrocarbon peak is 29.6%, and the high value lasts for 35 minutes, which belongs to the low total hydrocarbon and long duration mode.

[0090] Determine the number of cycles. The aftereffect belongs to the low total hydrocarbon and long duration mode, and the drilling fluid circulates for one cycle.

[0091] (1) After the measurement, drilling was resumed at 17:14. The drilling pressure, rotary table speed, and drilling time all have values, such as Figure 4 As shown in 4, 1# pump stroke, standpipe pressure, and outlet flow rate all have values, such as Figure 4 As shown in 5; the outlet density, outlet temperature, and outlet conductivity all have values, such as Figure 4 As shown in Figure 6. It can be seen from the above parameter characteristics that it is in the drilling state at this time.

[0092] (2) Figure 4 As shown in 2, it is the position where the aftereffect of two weeks should appear. The total hydrocarbon peak is 2.2%, the background value is 2.0%, and the aftereffect of two weeks is twice the background value, which has basically no effect on gas logging. Here, the drilling pressure, rotary speed, and drilling time all have values, such as Figure 4 As shown in 7, 1# pump stroke, standpipe pressure, and outlet flow rate all have values, such as Figure 4 As shown in 8; the outlet density, outlet temperature, and outlet conductivity all have values, such as Figure 4 As shown in Figure 9. It can be seen from the above parameter characteristics that it is in the drilling state at this time.

[0093] Although the various steps in the above embodiment are described in the above-mentioned order, those skilled in the art can understand that in order to achieve the effect of this embodiment, different steps do not have to be executed in such an order. They can be executed simultaneously (in parallel) or in a reverse order. These simple changes are within the scope of protection of the present invention.

[0094] The second embodiment of the present invention provides a drilling fluid circulation time prediction system based on aftereffect data, based on a drilling fluid circulation time prediction method based on aftereffect data, the system comprises:

[0095] The gas testing after-effect reaction judgment module is configured to judge whether to perform gas testing after-effect reaction detection according to the drilling parameters; if so, judge whether gas testing after-effect reaction occurs based on the static time of the drilling fluid and the concentration of the gas detected by the gas detector; if it occurs, jump to the after-effect mode judgment module;

[0096] An after-effect mode judgment module is configured to obtain a well logging diagram, obtain a total hydrocarbon curve on the well logging diagram; obtain an after-effect total hydrocarbon value and a total hydrocarbon duration according to the total hydrocarbon curve, and determine the after-effect mode in combination with a pre-constructed after-effect mode judgment method;

[0097] A cycle determination module configured to match the aftereffect pattern based on a pre-constructed drilling fluid cycle table to obtain a cycle of the drilling fluid;

[0098] The pre-constructed drilling fluid circulation period table is a mapping relationship between a preset after-effect mode and a set drilling fluid circulation period.

[0099] A third embodiment of the present invention provides an electronic device, including:

[0100] at least one processor; and

[0101] a memory communicatively connected to at least one of the processors; wherein,

[0102] The memory stores instructions that can be executed by the processor, and the instructions are used to be executed by the processor to implement a drilling fluid circulation time prediction method based on aftereffect data.

[0103] A fourth embodiment of the present invention provides a computer-readable storage medium storing computer instructions, wherein the computer instructions are used to be executed by the computer to implement a drilling fluid circulation time prediction method based on aftereffect data.

[0104] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related instructions of the system described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0105] It should be noted that the above embodiment provides a drilling fluid circulation time prediction system based on aftereffect data, and only uses the division of the above functional modules as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be decomposed or combined. For example, the modules in the above embodiments can be combined into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not regarded as improper limitations of the present invention.

[0106] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related instructions of the storage device and processing device described above can refer to the corresponding process in the aforementioned method embodiment and will not be repeated here.

[0107] Those skilled in the art should be able to appreciate that the modules and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software or a combination of the two, and the programs corresponding to the software modules and method steps can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the technical field. In order to clearly illustrate the interchangeability of electronic hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0108] Reference below Figure 5 , which shows a schematic diagram of the structure of a computer system of a server for implementing the method, system, and device embodiments of the present application. Figure 5 The server shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0109] like Figure 5As shown, the computer system includes a central processing unit (CPU) 501, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 502 or the program loaded from the storage part 508 to the random access memory (RAM) 503. Various programs and data required for system operation are also stored in the RAM 503. The CPU 501, the ROM 502 and the RAM 503 are connected to each other through a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0110] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed so that a computer program read therefrom is installed into the storage section 508 as needed.

[0111] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 509, and / or installed from the removable medium 511. When the computer program is executed by the central processing unit (CPU) 501, the above-mentioned functions defined in the method of the present application are executed. It should be noted that the above-mentioned computer-readable medium of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, - but not limited to - a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to, electrical connections with one or more conductors, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device, or device. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in combination with an instruction execution system, device, or device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0112] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0113] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0114] The terms "first", "second", etc. are used to distinguish similar objects rather than to describe or indicate a particular order or sequence.

[0115] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0116] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A drilling fluid circulation time prediction method based on aftereffect data is used to obtain the circulation period of drilling fluid according to the degree and high value duration of gas test aftereffect reaction when gas test aftereffect reaction is detected during drilling process, characterized in that: The method comprises the following steps: Step S10, judging whether to perform a gas test after-effect reaction detection according to the drilling parameters; if so, judging whether a gas test after-effect reaction occurs based on the static time of the drilling fluid and the concentration of the gas detected by the gas detector; If it appears, jump to step S20; Step S20, obtaining a well logging diagram, and obtaining a total hydrocarbon curve on the well logging diagram; obtaining an after-effect total hydrocarbon value and a total hydrocarbon duration according to the total hydrocarbon curve, and determining an after-effect mode in combination with a pre-constructed after-effect mode judgment method; Step S30, matching the aftereffect pattern based on the pre-constructed drilling fluid circulation period table to obtain the circulation period of the drilling fluid; The pre-constructed drilling fluid circulation period table is a mapping relationship between a preset after-effect mode and a set drilling fluid circulation period.

2. The method for predicting drilling fluid circulation time based on aftereffect data according to claim 1, characterized in that: The after-effect total hydrocarbon value is the peak value of the total hydrocarbon curve.

3. The method for predicting drilling fluid circulation time based on aftereffect data according to claim 1, characterized in that: The total hydrocarbon duration is the time between the half-width points of the total hydrocarbon curve.

4. The method for predicting drilling fluid circulation time based on aftereffect data according to claim 1, characterized in that: The pre-built after-effect mode determination method is: When the after-effect total hydrocarbon value is greater than a%, and the total hydrocarbon duration is greater than a first preset time, the after-effect mode is a high total hydrocarbon, long duration mode; When the after-effect total hydrocarbon value is between b% and a%, and the total hydrocarbon duration is less than the first preset time, the after-effect mode is a high-value total hydrocarbon and short duration mode; When the after-effect total hydrocarbon value is less than b%, and the total hydrocarbon duration is greater than the first preset time, the after-effect mode is a low total hydrocarbon, long duration mode.

5. The method for predicting drilling fluid circulation time based on aftereffect data according to claim 1, characterized in that: The pre-constructed drilling fluid circulation periodic table is: When the after-effect mode is a high total hydrocarbon and long duration mode, the drilling fluid circulates for at least c weeks; When the after-effect mode is a high-value full hydrocarbon and short-duration mode, the drilling fluid circulates for d weeks; When the after-effect mode is a low total hydrocarbon and long duration mode, the drilling fluid circulates for d weeks.

6. The method for predicting drilling fluid circulation time based on aftereffect data according to claim 5, characterized in that: After the drilling fluid has been circulated for d weeks or at least c weeks, the after-effect total hydrocarbon value is twice lower than the background value.

7. A drilling fluid circulation time prediction system based on aftereffect data, characterized in that: A method for predicting drilling fluid circulation time based on aftereffect data according to any one of claims 1 to 6, the system comprising: The gas testing after-effect reaction judgment module is configured to judge whether to perform gas testing after-effect reaction detection according to the drilling parameters; if so, judge whether gas testing after-effect reaction occurs based on the static time of the drilling fluid and the concentration of the gas detected by the gas detector; if it occurs, jump to the after-effect mode judgment module; An after-effect mode judgment module is configured to obtain a well logging diagram, obtain a total hydrocarbon curve on the well logging diagram; obtain an after-effect total hydrocarbon value and a total hydrocarbon duration according to the total hydrocarbon curve, and determine the after-effect mode in combination with a pre-constructed after-effect mode judgment method; A cycle determination module configured to match the aftereffect pattern based on a pre-constructed drilling fluid cycle table to obtain a cycle of the drilling fluid; The pre-constructed drilling fluid circulation period table is a mapping relationship between a preset after-effect mode and a set drilling fluid circulation period.

8. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions executable by the processor, and the instructions are used to be executed by the processor to implement a drilling fluid circulation time prediction method based on aftereffect data as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to be executed by the computer to implement a drilling fluid circulation time prediction method based on aftereffect data as described in any one of claims 1-6.

Images