Method, device and controller for determining drilling extension limit of extended reach well

Abstract

This specification provides a method, device and controller for determining the extension limit of extended reach well drilling, and relates to the field of drilling technology, wherein the method includes: based on the actual drilling parameters of the current depth, using a mechanical extension limit prediction model, a naked hole extension limit prediction model, and a hydraulic extension limit prediction model to simulate and calculate the drilling process, in the simulation process, each judgment item in the first judgment set is executed for each unit increase in the well depth, and when the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped to obtain the first extension limit, the second extension limit, and the third extension limit, and the minimum value of the first extension limit, the second extension limit, and the third extension limit is used as the target extension limit of extended reach well drilling. This scheme combines the calculation results of the mechanical extension limit, the naked hole extension limit, and the hydraulic extension limit, and uses their minimum value as the prediction result, and the obtained extended reach well drilling extension limit has a high accuracy.

Description

Technical Field

[0001] The present application relates to the field of drilling technology, and in particular to a method, device and controller for determining the extension limit of drilling of an extended reach well. Background Art

[0002] As conventional oil and gas resources become increasingly scarce, the exploration and development of oil and gas resources has gradually shifted to complex oil and gas resources such as mountainous areas, deep water, low porosity and low permeability. In order to effectively improve development efficiency, extended reach well technology has been widely used. Compared with conventional directional wells, extended reach wells have a longer horizontal extension distance, a larger contact area between the wellbore and the reservoir, and a single well production of more than 4 times that of a vertical well.

[0003] However, extended reach wells have large horizontal displacement and high water-to-vertical ratio. During their construction, there are generally problems such as poor wellbore stability, insufficient wellbore cleaning, high friction and high torque, and difficulty in running casing and completion strings. Therefore, under the constraints of specific formation environment, construction conditions, equipment performance, etc., there is a limit to the operating depth of extended reach wells. During the operation of extended reach wells, its extension limit and main constraints are one of the key issues that have attracted much attention. With the continuous improvement of drilling equipment and technology, the operating depth of extended reach wells has continued to increase, and the current world record has reached 15,000m.

[0004] Accurately predicting the extension limit of extended reach wells plays an important guiding role in the optimization design and drilling operations of extended reach wells. Since there are many factors that affect the extension limit of extended reach wells, it is difficult to consider their influence at the same time. Therefore, three sub-concepts have been developed, namely mechanical extension limit, open hole extension limit and hydraulic extension limit. The mechanical extension limit mainly considers the constraints of the mechanical performance of the drilling system. It is the maximum well depth that can be safely drilled under the constraints of friction, torque, and string strength. The open hole extension limit mainly considers the constraints of wellbore stability. It is the maximum well depth that can be safely drilled without breaking or leaking the open hole formation. It mainly depends on the safety density window of the open hole formation and the circulating pressure loss of the drilling mud. The hydraulic extension limit mainly evaluates the extension capacity of the extended reach well from a hydraulic perspective. It mainly depends on the drilling pump, hydraulic parameters and mechanical drilling speed.

[0005] Early research on the extension limit of extended reach wells was mainly based on qualitative analysis, that is, based on actual drilling cases of extended reach wells and the statistics and analysis of a large amount of drilling data, the influence of factors such as wellbore trajectory, wellbore structure, formation properties, and drilling equipment on the extension limit of extended reach wells was discussed.

[0006] With the development of drilling technology, the corresponding mathematical model is gradually established. Then, according to the theoretical calculation results, the influence of various factors on the extension limit of extended reach wells is quantitatively analyzed, and the corresponding main constraints are given. Wang Zhiming established a prediction model for the hydraulic extension limit of extended reach wells by considering the constraints of cuttings bed, drilling pump, actual drilling formation, etc.; Huang Wenjun established a prediction model for the mechanical extension limit of extended reach wells by considering the constraints of drilling guidance mode, pipe strength, and pipe string force; Li Xin established a prediction model for the open hole extension limit of extended reach wells by considering the constraints of annular pressure loss, formation properties, drilling conditions, etc.

[0007] Based on the actual drilling data of the extended reach well X, the extension limit of its 8-1 / 2" wellbore was calculated using the above prediction model. Figure 1 and Figure 2 The calculation results are shown in the figure, where FF1 is the friction coefficient of the casing section and FF2 is the friction coefficient of the open hole section.

[0008] However, the accuracy of the extension limit calculated by the above prediction model is not high, and it is difficult to play a guiding role in drilling operations. Summary of the invention

[0009] The purpose of the implementation mode of the present application is to provide a method, device and controller for determining the extension limit of extended reach well drilling, so as to solve the problem that the accuracy of the extension limit calculated according to the existing prediction model is not high.

[0010] In order to solve the above technical problems, the first aspect of the present specification provides a method for determining the extension limit of extended reach well drilling, comprising: based on the actual drilling parameters of the current depth, using a mechanical extension limit prediction model to simulate and calculate the drilling process, during the simulation process, each judgment item in the first judgment set is executed for each unit increase in the well depth, when the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the first extension limit; based on the actual drilling parameters of the current depth, using a naked hole extension limit prediction model to simulate and calculate the drilling process, during the simulation process, each judgment item in the second judgment set is executed for each unit increase in the well depth, when the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the second extension limit; based on the actual drilling parameters of the current depth, using a hydraulic extension limit prediction model to simulate and calculate the drilling process, during the simulation process, each judgment item in the third judgment set is executed for each unit increase in the well depth, when the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the third extension limit; the minimum value among the first extension limit, the second extension limit and the third extension limit is used as the target extension limit of extended reach well drilling.

[0011] In some embodiments, the method also includes: when a mechanical extension limit prediction model is used to simulate and calculate the drilling process, if a judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the first extension limit; when a naked hole extension limit prediction model is used to simulate and calculate the drilling process, if a judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the second extension limit; when a hydraulic extension limit prediction model is used to simulate and calculate the drilling process, if a judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the third extension limit; accordingly, after determining the first extension limit, the second extension limit, and the third extension limit, it also includes: using the constraint item corresponding to the minimum value among the first extension limit, the second extension limit, and the third extension limit as the constraint item of the target extension limit.

[0012] In some embodiments, after determining the constraint items of the target extension limit, it also includes: determining the measure set corresponding to the constraint items of the target extension limit according to the measure set corresponding to each judgment item in the pre-set first judgment set, the measure set corresponding to each judgment item in the second judgment set, and the measure set corresponding to each judgment item in the third judgment set; selecting at least one measure from the measure set corresponding to the constraint items of the target extension limit, and improving the current drilling parameters; and continuing the drilling operation according to the improved drilling parameters.

[0013] In some embodiments, while the drilling operation is continuing, the actual drilling data is updated and the method described in any one of the first aspects is continued.

[0014] In some embodiments, the first judgment set includes at least one of the following judgment items: failure of the internal or outer wall of the tubing, the drilling rig reaches the rated torque, rated lifting force or rated hook load, and the large hook load is zero; and / or, the second judgment set includes at least one of the following judgment items: the mud displacement reaches the upper or lower limit, the wellbore ruptures or collapses; and / or, the third judgment set includes at least one of the following judgment items: the mud displacement reaches the upper or lower limit, the drilling pump pressure reaches the rated pump pressure, and the cuttings bed thickness reaches a critical value.

[0015] In some embodiments, the set of measures corresponding to failure of the inner or outer wall of the pipe string includes at least one of the following measures: improving the strength of the drill pipe, improving the strength of the pipe; and / or, the set of measures corresponding to zero hook load includes at least one of the following measures: reducing friction and drag, using drag reducing joints, improving wellbore smoothness, and using hydraulic oscillators; and / or, the set of measures corresponding to the drilling rig reaching the rated torque, rated lifting force or rated hook load includes at least one of the following measures: improving drilling rig performance, reducing friction and drag, drag reducing / torque reducing joints, optimizing drilling tool combinations, and improving wellbore smoothness; and / or, the set of measures corresponding to the drilling pump pressure reaching the rated pump pressure includes at least one of the following solutions: improving drilling pump performance, strengthening wellbore cleaning, and reducing circulating pressure loss; and / or, the set of measures corresponding to the cuttings bed thickness reaching the critical value includes at least one of the following measures: strengthening wellbore cleaning and enhancing the rock carrying performance of the drilling fluid; and / or, the set of measures corresponding to the rupture or collapse of the wellbore includes at least one of the following measures: optimizing the drilling fluid density, optimizing the drilling fluid displacement, using additives, improving the formation pressure bearing capacity, using plugging agents, and avoiding wellbore leakage;

[0016] In some embodiments, based on the actual drilling parameters at the current depth, a mechanical extension limit prediction model is used to simulate and calculate the drilling process, including: obtaining the wellbore friction coefficient based on the actual drilling data at the current depth; substituting the wellbore friction coefficient into the mechanical extension limit prediction model, simulating and calculating the drilling process, and obtaining a first extension limit.

[0017] The second aspect of the present specification provides a device for determining the extension limit of drilling a large-reach well, including: a first simulation calculation unit, which is used to simulate and calculate the drilling process based on the actual drilling parameters of the current depth, using a mechanical extension limit prediction model, and in the simulation process, each judgment item in the first judgment set is executed every time the well depth increases by one unit, and when the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the first extension limit; a second simulation calculation unit, which is used to simulate and calculate the drilling process based on the actual drilling parameters of the current depth, using a naked hole extension limit prediction model, and in the simulation process, each judgment item in the second judgment set is executed every time the well depth increases by one unit A judgment item, when the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the second extension limit; a third simulation calculation unit, used to simulate and calculate the drilling process based on the actual drilling parameters of the current depth, using a hydraulic extension limit prediction model, during the simulation process, each judgment item in the third judgment set is executed for each unit increase in the well depth, when the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the third extension limit; a first determination unit, used to take the minimum value of the first extension limit, the second extension limit and the third extension limit as the target extension limit for drilling large-reach wells.

[0018] In some embodiments, when a mechanical extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the first extension limit; when a naked hole extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the second extension limit; when a hydraulic extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the third extension limit; accordingly, after determining the first extension limit, the second extension limit, and the third extension limit, it also includes: using the constraint item corresponding to the minimum value of the first extension limit, the second extension limit, and the third extension limit as the constraint item of the target extension limit.

[0019] In some embodiments, the device also includes: a second determination unit, used to determine the measure set corresponding to the constraint item of the target extension limit based on the measure set corresponding to each judgment item in the pre-set first judgment set, the measure set corresponding to each judgment item in the second judgment set, and the measure set corresponding to each judgment item in the third judgment set; a selection unit, used to select at least one measure from the measure set corresponding to the constraint item of the target extension limit and improve the current drilling parameters; an execution unit, used to continue the drilling operation according to the improved drilling parameters.

[0020] The third aspect of this specification provides a controller, comprising: a memory and a processor, the processor and the memory are communicatively connected to each other, the memory stores computer instructions, and the processor implements the steps of any one of the methods described in the first aspect by executing the computer instructions.

[0021] A fourth aspect of the present specification provides a computer storage medium, wherein the computer storage medium stores computer program instructions, and when the computer program instructions are executed, the steps of any one of the methods described in the first aspect are implemented.

[0022] The extended reach well drilling extension limit determination method, device and controller provided in this specification are based on the actual drilling parameters of the current depth, and use the mechanical extension limit prediction model, the open hole extension limit prediction model, and the hydraulic extension limit prediction model to simulate and calculate the drilling process. In the simulation process, each judgment item in the first judgment set is executed for each unit increase in the well depth. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped to obtain the first extension limit, the second extension limit, and the third extension limit. The minimum value of the first extension limit, the second extension limit, and the third extension limit is used as the target extension limit of the extended reach well drilling. This scheme combines the calculation results of the mechanical extension limit, the open hole extension limit, and the hydraulic extension limit, and uses their minimum value as the prediction result. The obtained extended reach well drilling extension limit has a high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 The graph showing the variation of mechanical extension limit with friction coefficient in the 8-1 / 2" borehole of Well X is shown;

[0025] Figure 2 The curves of the open hole extension limit and hydraulic extension limit of the 8-1 / 2" wellbore of Well X as a function of well depth are shown;

[0026] Figure 3 A schematic diagram showing the interaction and mutual influence of the mechanical extension limit, the open hole extension limit and the hydraulic extension limit;

[0027] Figure 4 A schematic diagram showing a method for determining the extension limit of extended reach well drilling provided in this specification is shown;

[0028] Figure 5 The figure shows the fitting of the ground torque further calculated by inverting the friction coefficient and the measured ground torque;

[0029] Figure 6 The figure shows the transformation curve of the total extension limit of the X well 8-1 / 2" wellbore determined by the extended reach well drilling extension limit determination method provided in this specification with the well depth;

[0030] Figure 7 Another schematic diagram of the method for determining the extension limit of extended reach well drilling provided in this specification is shown;

[0031] Figure 8 A schematic diagram showing the change of the main constraint conditions corresponding to the comprehensive extension limit of Well Y predicted by the method for determining the extension limit of large-reach drilling provided in this specification with the depth of the well;

[0032] Fig. 9 The principle block diagram of the device for determining the drilling extension limit of a large-reach well provided in this specification is shown;

[0033] Fig.10 The schematic diagram of the structure of the controller provided in this specification is shown. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0035] The inventor found that, after obtaining Figure 1 and Figure 2 In the process of showing the results, in order to simplify the calculation, the existing prediction model of the extension limit only calculates the variation law of the extension limit of the extended reach well from one angle, while the actual extension limit of the extended reach well should be the result of the combined effect of constraints such as the mechanical properties of the drilling system, the formation, and the drilling parameters. If only one angle is considered, the accuracy of the calculated extension limit value is difficult to guarantee; at the same time, the accurate main constraints cannot be obtained, which makes it difficult to play a guiding role in drilling operations.

[0036] Based on this, this manual proposes the calculation results of the comprehensive mechanical extension limit, open hole extension limit and hydraulic extension limit, takes their minimum value as the prediction result, and obtains the corresponding main constraints, thereby providing a theoretical basis for the optimal design and safety control of large-reach wells and ensuring the smooth implementation of large-reach well drilling work.

[0037] For the prediction model of the extension limit of extended reach wells, the drilling string, drilling fluid and the formation encountered are three key factors. Taking them as the research objects, the string mechanics model, the cuttings migration and wellbore pressure model and the wellbore stability model are established. Then, combined with the drilling system, mechanical properties, wellbore trajectory and wellbore structure, the mechanical extension limit, hydraulic extension limit and open hole extension limit, as well as their corresponding main constraints, can be calculated. At the same time, it should be noted that these limits are not independent of each other, but interact and influence each other, such as Figure 3 shown.

[0038] The mechanical extension limit prediction model is:

[0039] Γ M [F(s),M T (s),σ(s),T H ,M TH ,F B ,M TB ,...]=0 (1)

[0040] In the formula, Γ M represents the mechanical model of downhole tubing; F is the axial force of the tubing; M T is the string torque; T H is the hook load; M TH is the ground torque; F B M is the drilling pressure; TB is the drill bit torque.

[0041] The prediction model of naked eye extension limit is:

[0042] Γ S [P c (s),P f (s),P p (s),P l (s),...]=0 (2)

[0043] In the formula, Γ S is the wellbore stability model; P c is the collapse pressure; P f is the burst pressure; P p is the formation pressure; P l The leakage pressure.

[0044] The hydraulic extension limit prediction model is:

[0045] Γ H [P o (s),P i (s),H b (s),P H ,Q,...]=0 (3)

[0046] In the formula, Γ H represents the calculation model of cuttings migration and annular pressure; P o is the annular pressure; P i is the pressure in the drill string; H b is the thickness of the cuttings bed; P H is the surface pressure; Q is the drilling fluid displacement.

[0047] The actual extension limit of the extended reach well is their minimum value, namely:

[0048] L h =min(L h-me ,L h-op ,L h-hy ) (4)

[0049] Where, L h is the comprehensive extension limit of the extended reach well; L h-me L is the mechanical extension limit of the extended reach well; h-op L is the open hole extension limit of the extended reach well; h-hy It is the hydraulic extension limit of large-reach wells.

[0050] Table 1 below summarizes the actual drilling parameters used in the calculation of the mechanical extension limit prediction model, the open hole extension limit prediction model, and the hydraulic extension limit prediction model.

[0051] Table 1

[0052]

[0053]

[0054] Based on the existing mechanical extension limit prediction model, open hole extension limit prediction model, and hydraulic extension limit prediction model, this specification provides a method for determining the extension limit of extended reach well drilling, such as Figure 4 As shown, the method comprises the following steps:

[0055] S110: Based on the actual drilling parameters of the current depth, a mechanical extension limit prediction model is used to simulate and calculate the drilling process. During the simulation process, each judgment item in the first judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the first extension limit.

[0056] Actual drilling data includes the data of the formation and drilling site actually collected during the drilling process, as well as the operating parameters of each equipment used in drilling.

[0057] In some embodiments, based on the actual drilling parameters at the current depth, a mechanical extension limit prediction model is used to simulate and calculate the drilling process. The wellbore friction coefficient can be first obtained by inverting the actual drilling data at the current depth, and then the wellbore friction coefficient is substituted into the mechanical extension limit prediction model to simulate and calculate the drilling process until the first extension limit is obtained.

[0058] Figure 5 The figure shows the fitting of the ground torque calculated by inverting the friction coefficient and the measured ground torque. Figure 5 It can be seen that the friction coefficient obtained by this inversion method is more accurate.

[0059] In some embodiments, the borehole friction coefficient may also be determined as an empirical value.

[0060] In the actual drilling process, the depth of the well is usually gradually increased by lowering the number of well columns into the well one by one, and the length of a well column can be considered as a unit. The "simulation calculation drilling process" described in this specification includes: before calculating the lowering of a well column, the extension limit prediction model is used according to the actual drilling data to determine whether each judgment item is a predetermined value. When the judgment results of each judgment item are not the predetermined value, a well column is simulated to be lowered, and the actual drilling data is updated to the simulated actual drilling data accordingly; then, the extension limit prediction model is used according to the simulated actual drilling data to determine whether each judgment item is a predetermined value. When the judgment results of each judgment item are not the predetermined value, another well column is simulated to be lowered, and the simulated actual drilling data is updated accordingly... Repeat the operation until at least one judgment item in the judgment result is a predetermined value, stop simulating the lowering of the well column, and take the sum of the total length of all well columns previously simulated and the length of the actual drilling well as the simulated well depth, that is, the drilling extension limit.

[0061] In the "simulation calculation of the drilling process", the artificially controllable drilling parameters used to represent the artificially formulated drilling plan can be constant or adaptively changed as the well depth increases. That is, the extension limit obtained by the simulation calculation refers to the one obtained when the current drilling plan remains unchanged overall.

[0062] In this specification, "each judgment item in the judgment set" is a judgment item made according to the corresponding extension limit prediction model. When all of these judgment items are not predetermined values, the condition for continuing to run the well column to increase the well depth is satisfied. When the predetermined value of at least one judgment item is the predetermined value, the condition for running the well column to increase the well depth is not satisfied. That is, "each judgment item in the judgment set" is a judgment made to determine whether the condition for continuing to run the well column to increase the well depth is satisfied.

[0063] S120: Based on the actual drilling parameters of the current depth, the open hole extension limit prediction model is used to simulate and calculate the drilling process. During the simulation process, each judgment item in the second judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the second extension limit.

[0064] The “simulation and calculation of drilling process” in this step may refer to the description of S110 .

[0065] S130: Based on the actual drilling parameters of the current depth, the hydraulic extension limit prediction model is used to simulate and calculate the drilling process. During the simulation process, each judgment item in the third judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the third extension limit.

[0066] The “simulation and calculation of drilling process” in this step may refer to the description of S110 .

[0067] S140: Taking the minimum value among the first extension limit, the second extension limit, and the third extension limit as the target extension limit for extended reach well drilling.

[0068] The method for determining the extension limit of extended reach well drilling provided in this specification is based on the actual drilling parameters of the current depth, and uses the mechanical extension limit prediction model, the open hole extension limit prediction model, and the hydraulic extension limit prediction model to simulate and calculate the drilling process. In the simulation process, each judgment item in the first judgment set is executed for each unit increase in the well depth. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped to obtain the first extension limit, the second extension limit, and the third extension limit. The minimum value of the first extension limit, the second extension limit, and the third extension limit is used as the target extension limit of extended reach well drilling. This scheme combines the calculation results of the mechanical extension limit, the open hole extension limit, and the hydraulic extension limit, and uses their minimum value as the prediction result. The accuracy of the extended reach well drilling extension limit obtained is relatively high.

[0069] Figure 6 The figure shows the curve of the total extension limit of the X well 8-1 / 2" wellbore determined by the extended reach well drilling extension limit determination method provided in this specification with the change of well depth, where the comprehensive extension limit is also the target extension limit. Figure 1 and Figure 2 As can be seen from the curve graph, the extension limit determined by the extended reach well drilling extension limit determination method provided in this specification is quite different from the extension limit determined by the single extension limit prediction model. Since the extended reach well drilling extension limit determination method provided in this specification takes into account the mutual influence, interaction relationship and prediction results between the extension limit prediction models, it is more accurate.

[0070] In some embodiments, the extended reach well drilling extension limit determination method provided in this specification can also simultaneously determine the constraint item of the target extension limit, so that the drilling parameters can be improved in a targeted manner according to the constraint item of the target extension limit. Figure 5 Based on the method shown, it can be further improved to obtain Figure 7 The method for determining the extension limit of extended reach well drilling is shown. The method comprises the following steps:

[0071] S210: Based on the actual drilling parameters of the current depth, the mechanical extension limit prediction model is used to simulate and calculate the drilling process. During the simulation process, each judgment item in the first judgment set is executed for each unit increase in the well depth. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the first extension limit, and the judgment result is used as a constraint item of the first extension limit. Otherwise, the well depth is increased and the drilling process is continued to be simulated.

[0072] When the judgment result of the judgment item is a predetermined value, the judgment content of the judgment item is called a constraint condition for further deepening of the well depth, that is, a constraint item of the extension limit.

[0073] S220: Based on the actual drilling parameters of the current depth, the open hole extension limit prediction model is used to simulate and calculate the drilling process. During the simulation process, each judgment item in the second judgment set is executed for each unit increase in the well depth. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the second extension limit, and the judgment result is used as a constraint item of the second extension limit. Otherwise, the well depth is increased and the drilling process is continued to be simulated.

[0074] S230: Based on the actual drilling parameters of the current depth, the hydraulic extension limit prediction model is used to simulate and calculate the drilling process. During the simulation process, each judgment item in the third judgment set is executed for each unit increase in the well depth. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the third extension limit, and the judgment result is used as a constraint item of the third extension limit. Otherwise, the well depth is increased and the drilling process is continued to be simulated.

[0075] S240: Taking the minimum value among the first extension limit, the second extension limit, and the third extension limit as the target extension limit for extended reach well drilling.

[0076] S250: Taking a constraint item corresponding to a minimum value among the first stretch limit, the second stretch limit, and the third stretch limit as a constraint item of a target stretch limit.

[0077] After S250 obtains the constraint items of the target extension limit, it can be presented to the staff through human-computer interaction methods such as a display screen or voice. Experienced workers on site can manually specify improvement measures for the drilling plan based on the constraint items of the target extension limit to increase the extension limit, and use the improvement measures to improve the current drilling plan, and continue to perform drilling operations using the improved drilling plan.

[0078] Figure 8 The following is a schematic diagram showing the change of the main constraint conditions corresponding to the comprehensive extension limit of Well Y predicted by the method for determining the extension limit of large-reach drilling provided in this specification with the depth of the well. Figure 8It can be seen that when the well depth is 4000m and 5000m, the main constraint factor is the rated torque of the drilling rig; when the well depth is 4500m, the main constraint factor is the critical cuttings bed thickness; when the well depth is 5500m, the main constraint factor is wellbore rupture or leakage.

[0079] The above steps S210 to S250 may be automatically executed by the controller.

[0080] This manual proposes the calculation results of comprehensive mechanical extension limit, open hole extension limit and hydraulic extension limit, takes their minimum value as the prediction result, and obtains the corresponding main constraints, so as to provide a theoretical basis for the optimal design and safety control of extended reach wells and ensure the smooth implementation of extended reach well drilling.

[0081] In some embodiments, Figure 5 As shown, after S250, it also includes:

[0082] S260: Determine the measure set corresponding to the constraint item of the target extension limit according to the measure set corresponding to each judgment item in the pre-set first judgment set, the measure set corresponding to each judgment item in the second judgment set, and the measure set corresponding to each judgment item in the third judgment set.

[0083] The measure set refers to a set of measures used to improve drilling parameters according to the judgment items to increase the extension limit.

[0084] The measures in the measure set can be summarized and pre-set by experienced workers; or they can be obtained by first training a network model based on historical construction data and then inputting actual drilling data into the network model for prediction.

[0085] S270: Select at least one measure from the set of measures corresponding to the constraint item of the target extension limit, and improve the current drilling parameters.

[0086] S280: Continue the drilling operation according to the improved drilling parameters.

[0087] Steps S260 and S280 may be automatically performed, that is, the controller may automatically determine the constraint items and the improvement measures based on the automatic calculation of the extension limit.

[0088] like Figure 8As shown in the figure, when the well depth is 4000m and 5000m, the main constraint factor is the rated torque of the drilling rig. If the comprehensive extension limit is to be improved, on the one hand, the performance of the drilling rig can be improved, and on the other hand, measures to reduce friction and drag can be taken, such as back-marking to improve the smoothness of the wellbore and optimizing the drilling tool assembly. When the well depth is 4500m, the main constraint factor is the critical cuttings bed thickness. The comprehensive extension limit can be improved by appropriately increasing the displacement and circulating the wellbore to strengthen the movement of cuttings. When the well depth is 5500m, the main constraint factor is wellbore rupture or leakage. Measures such as adjusting and optimizing the drilling fluid density and displacement can be taken.

[0089] like Figure 7 As shown, in the process of continuing the drilling operation, the actual drilling data is updated, and the method for determining the extension limit of large-reach well drilling provided in this specification is continued.

[0090] Table 2 below summarizes the judgment items, the predetermined values ​​corresponding to the judgment items, and the measure sets corresponding to the judgment items in the first judgment set, the second judgment set, and the third judgment set provided in this specification. Table 2 below is only an example. In the actual implementation of the method for determining the drilling extension limit of an extended reach well provided in this specification, the judgment items, the predetermined values ​​corresponding to the judgment items, and the measure sets corresponding to the judgment items in the first judgment set, the second judgment set, and the third judgment set can all be changed according to actual needs.

[0091] Table 2

[0092]

[0093]

[0094] This specification provides a device for determining the extension limit of a large-reach well drilling. Fig. 9 As shown, the device includes a first simulation calculation unit 10 , a second simulation calculation unit 20 , a third simulation calculation unit 30 and a first determination unit 40 .

[0095] The first simulation calculation unit 10 is used to simulate and calculate the drilling process based on the actual drilling parameters of the current depth and adopt a mechanical extension limit prediction model. During the simulation process, each judgment item in the first judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the first extension limit.

[0096] The second simulation calculation unit 20 is used to simulate and calculate the drilling process based on the actual drilling parameters of the current depth and adopt the open hole extension limit prediction model. During the simulation process, each judgment item in the second judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the second extension limit.

[0097] The third simulation calculation unit 30 is used to simulate and calculate the drilling process based on the actual drilling parameters of the current depth and adopt the hydraulic extension limit prediction model. During the simulation process, each judgment item in the third judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the third extension limit.

[0098] The first determination unit 40 is used to use the minimum value among the first extension limit, the second extension limit and the third extension limit as the target extension limit for extended reach well drilling.

[0099] In some embodiments, when a mechanical extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the first extension limit; when a naked hole extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the second extension limit; when a hydraulic extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the third extension limit; accordingly, after determining the first extension limit, the second extension limit, and the third extension limit, it also includes: using the constraint item corresponding to the minimum value of the first extension limit, the second extension limit, and the third extension limit as the constraint item of the target extension limit.

[0100] In some embodiments, the device also includes: a second determination unit, used to determine the measure set corresponding to the constraint item of the target extension limit based on the measure set corresponding to each judgment item in the pre-set first judgment set, the measure set corresponding to each judgment item in the second judgment set, and the measure set corresponding to each judgment item in the third judgment set; a selection unit, used to select at least one measure from the measure set corresponding to the constraint item of the target extension limit and improve the current drilling parameters; an execution unit, used to continue the drilling operation according to the improved drilling parameters.

[0101] For a detailed description and beneficial effects of the above device, please refer to Figure 4 and Figure 7 The method embodiment shown will not be described in detail.

[0102] The embodiment of the present invention further provides a controller, such as Fig.10 As shown, the controller may include a processor 1001 and a memory 1002, wherein the processor 1001 and the memory 1002 may be connected via a bus or other means. Fig.10 The example of connecting through bus is taken in the following.

[0103] The processor 1001 may be a central processing unit (CPU). The processor 1001 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0104] The memory 1002 is a non-transitory computer-readable storage medium that can be used to store non-transitory software programs, non-transitory computer executable programs and modules, such as program instructions / modules corresponding to the method for determining the drilling extension limit of an extended reach well in an embodiment of the present invention (for example, Fig. 9 The processor 1001 executes various functional applications and data classification of the processor by running the non-transient software programs, instructions and modules stored in the memory 1002, that is, the method for determining the drilling extension limit of the extended reach well in the above method embodiment is implemented.

[0105] The memory 1002 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created by the processor 1001, etc. In addition, the memory 1002 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 1002 may optionally include a memory remotely arranged relative to the processor 1001, and these remote memories may be connected to the processor 1001 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0106] The one or more modules are stored in the memory 1002, and when executed by the processor 1001, the following is performed: Figure 1 A method for determining the extension limit of extended reach well drilling in the illustrated embodiment.

[0107] For details of the above controllers, please refer to Figure 4 and Figure 7 The relevant descriptions and effects in the corresponding embodiments are understood and will not be repeated here.

[0108] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above-mentioned types of memory.

[0109] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions.

[0110] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0111] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly contributed to the prior art in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute certain parts of the methods of each implementation method of the present application.

[0112] The present application can be used in many general or special computer system environments or configurations, such as personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer controllers, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc.

[0113] The present application may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0114] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0115] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0116] Although the present specification embodiment provides the method operation steps as described in the embodiment or flow chart, more or less operation steps may be included based on conventional or non-creative means. The order of steps listed in the embodiment is only one way in the order of execution of many steps, and does not represent a unique execution order. When the device or terminal product in practice is executed, it can be executed in sequence or in parallel (such as a parallel processor or a multi-threaded processing environment, or even a distributed data processing environment) according to the method shown in the embodiment or the accompanying drawings. The term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, product or equipment including a series of elements not only includes those elements, but also includes other elements not clearly listed, or also includes elements inherent to such process, method, product or equipment. In the absence of more restrictions, it is not excluded that there are other identical or equivalent elements in the process, method, product or equipment including the elements.

[0117] For the convenience of description, the above devices are described in various modules according to their functions. Of course, when implementing the embodiments of this specification, the functions of each module can be implemented in the same or more software and / or hardware, or the module implementing the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0118] Those skilled in the art also know that, in addition to implementing the controller in a purely computer-readable program code, the controller can be made to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules for implementing the method and structures within the hardware component.

[0119] This specification is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of this specification. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0120] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0121] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0122] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0123] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0124] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0125] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems or computer program products. Therefore, the embodiments of this specification may take the form of complete hardware embodiments, complete software embodiments or embodiments combining software and hardware. Moreover, the embodiments of this specification may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0126] The present specification embodiments may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present specification embodiments may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0127] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In the description of this specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of contradiction, a person skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0128] The above is only an example of the embodiment of the present specification and is not intended to limit the embodiment of the present specification. For those skilled in the art, the embodiment of the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiment of the present specification shall be included in the scope of the claims of the embodiment of the present specification.

Claims

1. A method for determining the drilling extension limit of an extended reach well, characterized in that: The method includes looping and executing the following methods and updating the actual drilling data until the drilling is completed: Based on the actual drilling parameters of the current depth, the mechanical extension limit prediction model is used to simulate and calculate the drilling process. During the simulation process, each judgment item in the first judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the first extension limit. Based on the actual drilling parameters of the current depth, the open hole extension limit prediction model is used to simulate and calculate the drilling process. During the simulation process, each judgment item in the second judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the second extension limit. Based on the actual drilling parameters of the current depth, the hydraulic extension limit prediction model is used to simulate and calculate the drilling process. During the simulation process, each judgment item in the third judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the third extension limit. Taking the minimum value among the first extension limit, the second extension limit and the third extension limit as the target extension limit for extended reach well drilling; The method further comprises: When the mechanical extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the first extension limit; When the open hole extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the second extension limit; When the hydraulic extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the third extension limit; Accordingly, after determining the first extension limit, the second extension limit, and the third extension limit, the method further includes: Using the constraint item corresponding to the minimum value among the first extension limit, the second extension limit, and the third extension limit as the constraint item of the target extension limit; After determining the constraints of the target extension limit, it also includes: Determine the measure set corresponding to the constraint item of the target extension limit according to the preset measure set corresponding to each judgment item in the first judgment set, the measure set corresponding to each judgment item in the second judgment set, and the measure set corresponding to each judgment item in the third judgment set; Selecting at least one measure from a set of measures corresponding to the constraint item of the target extension limit, and improving the current drilling parameters; The drilling operation is continued according to the improved drilling parameters.

2. The method according to claim 1, characterized in that The first judgment set includes at least one of the following judgment items: failure of the inner or outer wall of the pipe string, the drilling rig reaches the rated torque, the rated lifting force or the rated hook load, and the large hook load is zero; and / or, The second judgment set includes at least one of the following judgment items: mud displacement reaches an upper limit or a lower limit, the wellbore is broken or collapsed; and / or, The third judgment set includes at least one of the following judgment items: the mud displacement reaches an upper limit or a lower limit, the drilling pump pressure reaches a rated pump pressure, and the cuttings bed thickness reaches a critical value.

3. The method according to claim 1, characterized in that The set of measures corresponding to failure of the inner or outer wall of the pipe string includes at least one of the following measures: improving the strength of the drill pipe, improving the strength of the pipe; and / or, The set of measures corresponding to zero hook load includes at least one of the following measures: reducing friction and drag, using drag reducing joints, improving wellbore smoothness, and using hydraulic oscillators; and / or, The set of measures corresponding to the drilling rig reaching the rated torque, rated lifting force or rated hook load includes at least one of the following measures: improving the drilling rig performance, reducing friction and drag, reducing drag / torque joints, optimizing the drilling tool assembly, and improving the smoothness of the wellbore; and / or, The set of measures corresponding to the drilling pump pressure reaching the rated pump pressure includes at least one of the following solutions: improving the performance of the drilling pump, strengthening the wellbore cleaning, and reducing the circulation pressure loss; and / or, The set of measures corresponding to the cuttings bed thickness reaching a critical value includes at least one of the following measures: strengthening wellbore cleaning and enhancing the rock-carrying performance of the drilling fluid; and / or, The set of measures corresponding to wellbore rupture or collapse includes at least one of the following measures: optimizing drilling fluid density, optimizing drilling fluid displacement, using additives, increasing formation pressure bearing capacity, using plugging agents, and avoiding wellbore leakage.

4. The method according to claim 1, characterized in that: Based on the actual drilling parameters at the current depth, the mechanical extension limit prediction model is used to simulate and calculate the drilling process, including: The borehole friction coefficient is obtained by inverting the actual drilling data at the current depth; The borehole friction coefficient is substituted into the mechanical extension limit prediction model, and the drilling process is simulated and calculated to obtain the first extension limit.

5. A device for determining the extension limit of extended reach well drilling, characterized in that: include: A first simulation calculation unit is used to simulate and calculate the drilling process based on the actual drilling parameters of the current depth using a mechanical extension limit prediction model. During the simulation process, each judgment item in the first judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the first extension limit. A second simulation calculation unit is used to simulate and calculate the drilling process based on the actual drilling parameters of the current depth using a naked hole extension limit prediction model. During the simulation process, each judgment item in the second judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the second extension limit. A third simulation calculation unit is used to simulate and calculate the drilling process based on the actual drilling parameters of the current depth using a hydraulic extension limit prediction model. During the simulation process, each judgment item in the third judgment set is executed every time the well depth increases by one unit. When the judgment result of a judgment item is a predetermined value, the simulation calculation is stopped and the simulated well depth is used as the third extension limit. A first determining unit is used to use the minimum value among the first extension limit, the second extension limit and the third extension limit as a target extension limit for extended reach well drilling; The first simulation calculation unit, the second simulation calculation unit, the third simulation calculation unit, and the first determination unit are executed cyclically, and the actual drilling data is updated until the drilling is completed; When the mechanical extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the first extension limit; When the open hole extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the second extension limit; When the hydraulic extension limit prediction model is used to simulate and calculate the drilling process, if the judgment result of a judgment item is a predetermined value, the judgment result is used as a constraint item of the third extension limit; accordingly, after determining the first extension limit, the second extension limit, and the third extension limit, the method further includes: using a constraint item corresponding to the minimum value among the first extension limit, the second extension limit, and the third extension limit as a constraint item of the target extension limit; The device also includes: a second determination unit, used to determine the measure set corresponding to the constraint item of the target extension limit based on the measure set corresponding to each judgment item in the preset first judgment set, the measure set corresponding to each judgment item in the second judgment set, and the measure set corresponding to each judgment item in the third judgment set; a selection unit, used to select at least one measure from the measure set corresponding to the constraint item of the target extension limit and improve the current drilling parameters; and an execution unit, used to continue to perform the drilling operation according to the improved drilling parameters.

6. A controller, characterized in that: include: A memory and a processor, wherein the processor and the memory are communicatively connected to each other, the memory stores computer instructions, and the processor implements the steps of the method according to any one of claims 1 to 4 by executing the computer instructions.

7. A computer storage medium, characterized in that: The computer storage medium stores computer program instructions, and when the computer program instructions are executed, the steps of the method according to any one of claims 1 to 4 are implemented.

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