CN117191595B - Shale mechanical property detection device and method - Google Patents
Shale mechanical property detection device and method Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a shale mechanical property detection device and method. The device comprises: the system comprises a scratch execution system, a data acquisition system and a data processing control system; the data processing control system is used for generating a shale mechanical property testing task and controlling the scratch pressing execution system to execute the shale mechanical property testing task on a shale sample to be tested; the data acquisition system is used for detecting a stress load value corresponding to an execution tool bit in the pressure scratch execution system in the execution process of the shale mechanical property test task; the data processing control system is also used for determining at least one shale mechanical property parameter value corresponding to the shale sample to be tested according to preset test parameters and stress load values in the shale mechanical property test task, and determining fracturing desserts corresponding to the shale sample to be tested based on the at least one shale mechanical property parameter value. According to the technical scheme, the shale fracturing integrated measurement effect is achieved, and the accuracy and the efficiency of determining the rock sample fracturing dessert are improved.
Description
Technical Field
The invention relates to the technical field of oilfield geomechanics, in particular to a shale mechanical property detection device and method.
Background
The shale pore and permeability of the shale reservoir rich in organic matters are lower than those of a conventional oil reservoir, the geological environment is complex, and the shale reservoir is required to be subjected to fracture network modification by adopting a hydraulic fracturing technology so as to improve the flow conductivity of the reservoir. The elastic modulus value, the fracture toughness value and the hardness value can reflect the physical characteristics of shale microstructure characteristics, reservoir performance and the like, and further, the expansion rule and the fracturing effect of the fracture network in the shale reservoir transformation process are revealed. The grasping of the mechanical properties of shale has important significance for the related work of oil reservoir yield increase, well drilling and shaft stability.
At present, a common centimeter-scale scratching technology can realize continuous scratching on shale coring samples, and the technology can realize continuous section evaluation of shale elastic modulus value, fracture toughness value, hardness value and mineral composition by combining XRD all-rock mineral analysis. However, existing scratch equipment cannot perform tests under shale reservoir in-situ temperature-pressure conditions; shale scratch and indentation tests are carried out by adopting two sets of equipment; in addition, because the quality of the core sample obtained on site is soft, broken and complex in shape, the sample cannot be clamped on equipment, and a large amount of core samples cannot be subjected to a scratch test.
Disclosure of Invention
The invention provides a shale mechanical property detection device and method, which are used for realizing the effect of shale fracturing integral measurement, saving the device cost and test space, further improving the measurement accuracy and measurement efficiency of rock sample fracturing desserts and effectively improving the utilization rate of reservoir rock samples.
According to a first aspect of the present invention, there is provided a shale mechanical properties detection apparatus, the apparatus comprising: the system comprises a scratch execution system, a data acquisition system and a data processing control system, wherein,
the data processing control system is used for receiving the editing completion triggering operation aiming at the shale mechanical property test item, generating a shale mechanical property test task, and controlling the scratch pressing execution system to execute the shale mechanical property test task on a shale sample to be tested;
the data acquisition system is used for detecting a stress load value corresponding to an execution tool bit in the pressure scratch execution system in the execution process of the shale mechanical property test task and transmitting the stress load value to the data processing control system;
the data processing control system is further used for receiving the stress load value, determining at least one shale mechanical property parameter value corresponding to the shale sample to be tested according to preset test parameters in the shale mechanical property test task and the stress load value, and determining fracturing desserts corresponding to the shale sample to be tested based on the at least one shale mechanical property parameter value;
Wherein the at least one shale mechanical property parameter value comprises an elastic modulus value, a fracture toughness value, and a hardness value; the fracturing dessert is a partial area in the shale sample to be tested, and the partial area meets preset construction standards.
According to a second aspect of the present invention, there is provided a shale mechanical properties detection method, the method comprising:
receiving an edit completion triggering operation aiming at a shale mechanical property test item through a data processing control system, generating a shale mechanical property test task, and controlling a scratch execution system to execute the shale mechanical property test task on a shale sample to be tested;
in the execution process of the shale mechanical property test task, detecting a stress load value corresponding to an execution tool bit in the scratch execution system through a data acquisition system, and transmitting the stress load value to the data processing control system;
receiving the stress load value through the data processing control system, determining at least one shale mechanical property parameter value corresponding to the shale sample to be tested according to preset test parameters in the shale mechanical property test task and the stress load value, and determining fracturing desserts corresponding to the shale sample to be tested based on the at least one shale mechanical property parameter value; wherein the at least one shale mechanical property parameter value comprises an elastic modulus value, a fracture toughness value, and a hardness value; the fracturing dessert is a partial area in the shale sample to be tested, and the partial area meets preset construction standards.
The embodiment of the invention provides a shale mechanical property detection device, which comprises: the system comprises a pressure scratch executing system, a data acquisition system and a data processing control system, wherein the data processing control system is used for receiving the trigger operation of editing and completing the shale mechanical property test item, generating a shale mechanical property test task and controlling the pressure scratch executing system to execute the shale mechanical property test task on a shale sample to be tested; the data acquisition system is used for detecting a stress load value corresponding to an execution tool bit in the pressure scratch execution system in the execution process of the shale mechanical property test task and transmitting the stress load value to the data processing control system; the data processing control system is also used for receiving the stress load value, determining at least one shale mechanical property parameter value corresponding to the shale sample to be tested according to a preset test parameter and the stress load value in the shale mechanical property test task, and determining fracturing dessert corresponding to the shale sample to be tested based on the at least one shale mechanical property parameter value, so that the problems that an existing scratch device cannot conduct a test under the condition of in-situ temperature-pressure of a shale reservoir in the related art, the shale scratch test and the indentation test need to be conducted by two sets of equipment are solved, the effect of integrated measurement of shale scratch is achieved, the device cost and test space are saved, and further, the determination accuracy and the determination efficiency of the rock sample fracturing dessert can be improved, and the utilization rate of the reservoir rock sample is effectively improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a shale mechanical property detection device according to a first embodiment of the invention;
fig. 2 is a schematic structural diagram of a shale mechanical property detection device according to a first embodiment of the invention;
fig. 3 is a flowchart of a shale mechanical property detection method according to a second embodiment of the invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a schematic structural diagram of a shale mechanical property detection device provided in an embodiment of the present invention, where the embodiment may be adapted to perform a scratch test on a shale sample with any shape to determine a situation of a fracturing dessert of the shale sample, as shown in fig. 1, the shale mechanical property detection device provided in the embodiment includes: the scratch execution system 100, the data acquisition system 200 and the data processing control system 300. The following describes the structural composition of the shale mechanical property detection apparatus of this embodiment in detail.
The data processing control system 300 is configured to receive an edit completion trigger operation for a shale mechanical property test item, generate a shale mechanical property test task, and control the scratch execution system 100 to execute the shale mechanical property test task on a shale sample to be tested; the data acquisition system 200 is used for detecting a stress load value corresponding to an execution tool bit in the pressure scratch execution system in the execution process of the shale mechanical property test task and transmitting the stress load value to the data processing control system 300; the data processing control system 300 is further configured to receive the stress load value, determine at least one shale mechanical property parameter value corresponding to the shale sample to be tested according to a preset test parameter and the stress load value in the shale mechanical property test task, and determine a fracturing dessert corresponding to the shale sample to be tested based on the at least one shale mechanical property parameter value;
among other things, the scoring execution system 100 may be an execution device that performs an indentation test and/or a scoring test. The indentation performance system 100 may be used to perform indentation tests and/or scratch tests on any sample. The scoring actuator system 100 may include a plurality of subsystems, optionally including a horizontal movement subsystem, a vertical movement subsystem, and an actuator blade (e.g., a scoring blade and a scoring blade), etc. The subsystems cooperate to perform indentation tests and scratch tests on the sample to be tested. The data acquisition system 200 may be a device that acquires execution data of an execution device during execution of a shale mechanics property testing task. The implement may include an implement head, a horizontal movement device, a vertical movement device, and the like. Accordingly, the execution data may include a force load of the execution tool bit, a horizontal displacement of the horizontal movement device, and a vertical displacement of the vertical movement device. Alternatively, the data acquisition system 200 may include a load sensor and a displacement sensor. The data processing control system 300 may be a terminal device that processes received data values based on a pre-deployed algorithm, and may also be a terminal device that controls the scratch execution system 100. Data processing control system 300 may be any terminal device capable of controlling the scoring execution system 100. Alternatively, the data processing control system 300 may be a mobile terminal, a PC or a tablet computer, etc.
The shale mechanical property test item can be an entry control for editing shale mechanical property test tasks. Shale mechanics performance test items may be displayed in a shale mechanics performance test page of data processing control system 300. The shale mechanics property test item may include a plurality of editable items associated with shale mechanics property test tasks. Shale mechanics characteristic testing tasks may include shale indentation testing tasks and shale scratch testing tasks. The shale sample to be tested may be a shale sample to be tested.
In practical application, a trigger operation can be input to a shale mechanical property test control preset in the data processing control system 300, when the trigger operation for the control is detected, the trigger operation can be responded, a shale mechanical property test page is displayed based on a display interface of the data processing control system 300, a plurality of shale mechanical property test items and an editing completion control can be included in the shale mechanical property test page, and a user can edit the displayed shale mechanical property test items through the editing trigger operation. And when the trigger operation for the editing completion control is detected, the triggering operation for the editing completion control can be determined, the trigger operation is responded, a shale mechanical property testing task is generated according to the edited shale mechanical property testing item, and a task execution instruction comprising the shale mechanical property testing task is generated. Further, a task execution instruction may be sent to the crush scratch execution system 100 to control the crush scratch execution system 100 to execute the generated shale mechanical property testing task on the shale sample to be tested.
Further, in the execution process of the shale mechanical property test task, the stress load value corresponding to the execution tool bit in the scratch execution system 100 can be detected by the data acquisition system 200, and then the stress load value can be transmitted to the data processing control system 300 through the data transmission cable.
The executing tool bit may be a device in the scoring executing system 100, which is in contact with the surface of the shale sample to be tested and performs a scoring test on the shale sample to be tested. Alternatively, the implement bits may include an indentation bit and a scoring bit. The force load value may be a load value to which the tool bit is subjected during contact with the shale sample to be tested. In practical application, for different executing tool bits, the corresponding stress load values can include various types, and optionally, if the executing tool bit is an indentation tool bit, the corresponding stress load value is an indentation load value, and the indentation load value can be a vertical force; if the executing tool bit is a scratch tool bit, the corresponding stress load value can be a scratch load value, and the scratch load value can comprise transverse force and vertical force.
In practical applications, shale mechanical property testing tasks performed on a shale sample to be tested may include shale indentation testing tasks and shale scratch testing tasks. For different shale mechanical property testing tasks, the scratch execution system can correspond to different task execution processes, and the execution processes of the two tasks can be respectively described below.
Optionally, the shale mechanical property testing task comprises a shale indentation testing task; the force load value comprises an indentation load value; the preset test parameters comprise preset indentation test parameters; the creasing mark executing system 100 comprises a horizontal moving subsystem, a vertical moving subsystem and a creasing tool bit, wherein the horizontal moving subsystem is used for responding to a task executing instruction, controlling the creasing tool bit to move to a preset starting datum point corresponding to a shale sample to be tested and controlling the creasing tool bit to horizontally move according to preset creasing test parameters; the vertical movement subsystem is used for carrying out initial longitudinal position positioning after the indentation tool bit moves to a preset initial reference point and controlling the indentation tool bit to process the shale sample to be tested according to preset indentation test parameters; the data acquisition system 200 is configured to acquire an indentation load value corresponding to an indentation tool bit during execution of a shale indentation test task, and transmit the indentation load value to the data processing control system 300.
The shale indentation test task can be a task of carrying out an indentation test on a shale sample to be tested. The horizontal movement subsystem can be used for controlling the indentation tool bit to horizontally move according to preset horizontal displacement and preset speed. The indentation tool bit may be a tool bit that performs an indentation process on the sample to imprint a trace on the sample. The indentation tool bit may be any shaped tool bit, alternatively a conical or circular tool bit. The predetermined starting datum may be a predetermined task starting datum, which may be any point disposed on the surface of the shale sample to be measured. The preset indentation test parameters may be preset, and various parameters for performing the indentation test may be set in advance. Optionally, the preset indentation test parameters may include a position corresponding to each indentation point, an indentation depth corresponding to each indentation point, and the like. The vertical movement subsystem can be used for controlling the indentation tool bit to vertically move according to preset vertical displacement and preset speed and carrying out subsequent indentation test by matching with the horizontal movement subsystem. The indentation load value can be a load value born by the indentation tool bit in the task execution process, and can also be understood as a load value born by the indentation tool bit when the indentation tool bit is contacted with the shale sample to be tested and is imprinted at an indentation point. The indentation load value may be a vertical force.
In practical applications, after the scratch execution system 100 receives a task execution instruction including a shale indentation test task, the task execution instruction may be responded, and the indentation tool bit is controlled to move to a preset starting datum point corresponding to the shale sample to be tested by the horizontal movement subsystem. And after the indentation tool bit moves to a preset initial reference point, the vertical movement subsystem can be used for initial longitudinal position positioning, and then the horizontal movement subsystem and the vertical movement subsystem are mutually matched to control the indentation tool bit to carry out indentation treatment on a plurality of indentation points on the shale sample to be detected according to preset indentation test parameters. Further, during execution of the indentation test task, the indentation load value corresponding to the indentation tool bit may be detected and collected by the data collection system 200, and the collected indentation load value may be transmitted to the data processing control system 300.
Further, the data processing control system 300 is configured to receive the indentation load value, and determine an elastic modulus value corresponding to the shale sample to be tested according to the preset indentation test parameter and the indentation load value.
The elastic modulus is a measure for measuring the elastic deformation resistance of an object, and can be regarded as an index for measuring the degree of difficulty in generating elastic deformation of a material, and the larger the value is, the larger the stress for generating certain elastic deformation of the material is, namely the larger the rigidity of the material is, namely the smaller the elastic deformation is under the action of certain stress. The preset indentation test parameters can comprise contact area and contact depth of the indentation tool bit and the shale sample to be tested, configuration parameters of the indentation tool bit and the like.
In practical application, after receiving the indentation load values corresponding to the plurality of indentation points, for each indentation point, the elastic modulus value corresponding to the current indentation point can be determined according to the preset indentation test parameter and the indentation load value corresponding to the current indentation point.
For example, the elastic modulus value may be determined based on the following formula:
wherein,representing the intermediate modulus of elasticity value; />Representing coefficients related to the shape of the indentation tool bit, 1.034 may be taken; />Representing contact stiffness; />Representing the contact area between the indentation tool bit and the shale sample to be tested; />Indicating the contact depth; />The Poisson ratio of the indentation tool bit can be 0.07; />The elastic modulus value of the indentation tool bit can be 1114 megapascals; />The poisson ratio of the shale sample to be measured can be 0.25; />The elastic modulus of the shale sample to be measured is represented; />Representing the indentation load value.
It should be noted that, the elastic modulus value corresponding to the shale sample to be measured may be a discrete data value formed by a plurality of indentation points and the corresponding elastic modulus value.
Optionally, the shale mechanical property testing task comprises a shale scratch testing task; the stress load value comprises a scratch load value; the preset test parameters comprise preset scratch test parameters; the scratch execution system 100 comprises a horizontal movement subsystem, a vertical movement subsystem and a scratch tool bit, wherein the horizontal movement subsystem is used for responding to a task execution instruction, controlling the scratch tool bit to move to a preset starting datum point corresponding to a shale sample to be tested and controlling the scratch tool bit to horizontally move according to preset scratch test parameters; the vertical movement subsystem is used for positioning the initial longitudinal position after the scratch tool bit moves to a preset initial datum point corresponding to the shale sample to be tested, and controlling the scratch tool bit to process the shale sample to be tested according to preset scratch test parameters; the data acquisition system 200 is configured to acquire a scratch load value corresponding to a scratch bit during execution of a shale scratch test task, and transmit the scratch load value to the data processing control system 300.
The shale scratch test task can be a task of performing a scratch test on a shale sample to be tested. The horizontal movement subsystem can be used for controlling the scratch tool bit to horizontally move according to preset horizontal displacement and preset speed. The scoring blade may be a blade that strokes over the sample to leave a score of a preset depth on the sample. The scoring blade may be any shape blade, alternatively a rectangular blade. The predetermined starting datum may be a predetermined task starting datum, which may be any point disposed on the surface of the shale sample to be measured. The preset scratch test parameters may be preset, and various parameters for performing the scratch test are set in advance. Optionally, the preset scratch test parameters may include a scratch displacement, a scratch depth, a scratch angle, and the like. The vertical movement subsystem can be used for controlling the scratch tool bit to vertically move according to preset vertical displacement and preset speed and is matched with the horizontal movement subsystem to carry out subsequent scratch test. The scratch load value can be a load value born by the scratch bit in the task execution process, and can also be understood as a load value born by the scratch bit when the scratch bit is contacted with the shale sample to be tested and makes a scratch. The scratch load value may include a lateral force and a vertical force.
In practical applications, after the press scratch executing system 100 receives a task executing instruction including a shale scratch test task, the press scratch executing system may respond to the task executing instruction, and control the scratch tool bit to move to a preset starting datum point corresponding to the shale sample to be tested through the horizontal movement subsystem. Furthermore, after the scratch tool bit moves to a preset initial reference point, initial longitudinal position positioning can be performed through the vertical movement subsystem, and then the scratch tool bit can be controlled to perform scratching processing on the shale sample to be detected through the mutual cooperation of the horizontal movement subsystem and the vertical movement subsystem according to preset scratch test parameters. Further, during the execution of the scratch test task, the scratch load value corresponding to the scratch bit may be detected and collected by the data collection system 200, and the collected scratch load value may be transmitted to the data processing control system 300.
Further, the data processing control system is used for receiving the scratch load value and determining a fracture toughness value and a hardness value corresponding to the shale sample to be tested according to the preset scratch test parameter and the scratch load value.
Wherein, preset scratch test parameters may include scratch bit width and scratch depth.
In practical applications, after receiving the scratch load value, the equivalent load may be determined according to the lateral force and the vertical force in the scratch load value. Further, fracture toughness values can be determined based on the equivalent force and preset scratch test parameters. And, the contact area may be determined according to the scribing bit width and the scribing depth, and the ratio between the lateral force and the contact area may be determined, and the ratio may be regarded as a hardness value.
For example, the fracture toughness value may be determined based on the following formula:
wherein,representing an equivalent load value; />Representing the lateral force in the scratch load value; />Representing the vertical force in the scratch load value; />Representing fracture toughness values; />Representing the bit coefficient; />Representing the contact area between the scratch tool bit and the shale sample to be tested; />Representing the width of the scratch bit; />Indicating the scratch depth.
For example, the hardness value may be determined based on the following formula:
wherein,representing a hardness value; />Representing the lateral force in the scratch load value; />Indicating scratch tool bit and page to be testedArea of contact between the rock samples.
The fracture toughness value corresponding to the shale sample to be tested can be a continuous data value determined in the execution process of the shale scratch test task, the starting point of the continuous data value can be a fracture toughness value corresponding to a preset starting reference point, and the end point is a fracture toughness value corresponding to a scratch end point; the hardness value corresponding to the shale sample to be tested can be a continuous data value determined in the execution process of the shale scratch test task, the starting point of the continuous data value can be a hardness value corresponding to a preset starting reference point, and the end point is a hardness value corresponding to a scratch end point.
Optionally, the data processing control system is used for screening the elastic modulus value, the fracture toughness value and the hardness value according to preset screening criteria, and determining the fracturing dessert based on the screened elastic modulus value, fracture toughness value and hardness value.
The preset screening criteria may be preset criteria for determining the fracturing dessert, among others. The preset screening criteria may include a preset modulus of elasticity threshold, a preset fracture toughness threshold, and a preset hardness threshold. The fracturing dessert is a partial area in the shale sample to be tested, and the partial area meets preset construction standards.
In practical application, the value, smaller than the preset elastic modulus threshold value, of the elastic modulus value corresponding to the shale sample to be detected can be screened out to serve as the screened elastic modulus value; screening out the value smaller than the preset fracture toughness threshold value from the fracture toughness value corresponding to the shale sample to be tested, and taking the value as the fracture toughness value after screening; and screening out the value, which is smaller than the preset hardness threshold value, of the hardness value corresponding to the shale sample to be tested, and taking the value as the fracture toughness value after screening. Further, the intersection of the three data sets of the modulus of elasticity value, the fracture toughness value, and the hardness value after screening can be determined. Thus, the determined intersection can be used as a fracturing dessert corresponding to the shale sample to be tested.
In practical application, most shale samples to be tested are shale samples with irregular shale shapes, and in order to clamp and measure the shale samples to be tested on the premise of not damaging the shale samples, a clamping system for clamping the shale samples to be tested can be further arranged, so that the shale samples to be tested can be clamped through the clamping system when a task is executed.
Based on this, the device further comprises: the multi-scale rock sample soft clamping system is used for clamping a shale sample to be tested and controlling the three-dimensional pressure of the shale sample to be tested to reach preset formation pressure.
The multi-scale rock sample soft clamping system is used for carrying out surface non-destructive soft clamping on shale samples with different shapes, sizes and lengths; meanwhile, the method can also be used for controlling the three-dimensional pressure of the shale sample to reach the preset formation pressure. In this embodiment, the multi-scale rock sample soft clamping system may include a multi-scale rock sample clamp, a hydraulic cylinder, a jacking device, a soft clamping face, and a pressure sensor. The predetermined formation pressure may be a predetermined simulated pressure of the formation in which the shale sample is located. The preset formation pressure may be a simulated reservoir true pressure.
In practical application, the multi-scale rock sample clamp and the soft clamping surface are matched with each other to clamp the shale sample to be tested, and the soft clamping surface is in contact with the outer surface of the shale sample to be tested; the pressure sensor is used for detecting the pressure born by the surface of the shale sample to be detected and is matched with the hydraulic cylinder, so that the three-dimensional pressure of the shale sample to be detected reaches the preset stratum pressure, and the stability of the pressure during task execution is maintained. The advantages of this arrangement are that: the soft clamping system for the rock samples with any shape and angle is realized, the difficult problems that the traditional scratch clamping equipment can only clamp regular rock samples and has a narrow application range are solved, and the soft clamping surface of the rock samples is almost free from damage.
Optionally, the apparatus further comprises: and the temperature control system is used for controlling the sample surface temperature of the shale sample to be tested to be maintained at the preset stratum temperature in the execution process of the shale mechanical property test task.
The temperature control system can be a device for carrying out preset temperature simulation and can comprise a heating insulation sleeve and a temperature sensor. The predetermined formation temperature may be a predetermined simulated temperature of the formation in which the shale sample is located. The preset formation pressure may be a simulated reservoir true temperature.
In practical application, the heating insulation sleeve can be wrapped at the outer end of the multi-scale rock sample clamp, and before the execution of the shale mechanical property test task, the heating insulation sleeve can be heated, so that the surface temperature of a shale sample to be tested in the heating insulation sleeve is increased, when the temperature sensor detects that the surface temperature of the sample reaches the preset formation temperature, the heating can be stopped, and the surface temperature of the shale sample to be tested is always maintained at the preset formation temperature.
Optionally, the apparatus further comprises: the system comprises a mineral analysis system, a control system and a control system, wherein the mineral analysis system is used for acquiring sample powder at a plurality of preset positions on a shale sample to be tested in the execution process of a shale mechanical property test task, and detecting mineral compositions of the sample powder at the plurality of preset positions and composition ratios of constituent minerals.
The mineral analysis system is used for carrying out continuous and nondestructive qualitative and quantitative mineral analysis on the surface of the rock sample, so as to analyze the mineral composition and proportion of different positions of the rock sample. The mineral analysis system may include an X-ray Diffraction (XRD) diffractometer and a powder collection tank. The powder collection trough may be used to collect a sufficient amount of scored rock debris. The XRD diffractometer can be used for detecting the rock sample powder mineral composition and proportion marked at different positions. The preset location may be a predetermined mineral analysis location.
In practical application, sample powder at a plurality of preset positions on a shale sample to be detected can be collected through a powder collecting tank in the execution process of a shale mechanical property testing task, and then the mineral composition of the sample powder at the plurality of preset positions and the composition proportion of each composition mineral can be detected through an XRD diffractometer. The advantages of this arrangement are that: the rock debris mineral components are continuously detected in real time after the scratch tool bit is scratched, the mineral components and the proportions of different positions of the rock sample are rapidly known, and the analysis result can be compared with the scratch experiment result so as to guide the reservoir fracturing work; solves the problem that the traditional scratch device can not analyze mineral components, and saves the experiment cost and experiment time.
Fig. 2 is a schematic structural diagram of an alternative example of a shale mechanical property detection apparatus according to an embodiment of the present invention. As shown in fig. 2, the shale mechanical property detection apparatus may include a crush scratch integrated table 1; a scoring blade 2; an indentation tool bit 3; a computer terminal 4; a moving guide 5; a servo motor 6; a transmission main shaft 7; a multi-scale rock sample holder 8; a hydraulic cylinder 9; a jacking device 10; a soft grip surface 11; heating the insulation sleeve 12; a temperature sensor 13; a lifting device 14; a scratch depth control means 15; a scratch load sensor 16; an indentation depth control device 17; an indentation load sensor 18; an XRD diffractometer 19; a powder collection tank 20; a horizontal displacement sensor 21; a vertical displacement sensor 22; a pressure sensor 23; a data transmission cable 24.
The shale mechanical property detection device comprises a horizontal movement system, a multi-scale rock sample soft clamping system, a temperature control system, a scratch system, an indentation system, a mineral analysis system, a data acquisition system and a data processing control system.
The horizontal movement system comprises a movement guide rail 5, a servo motor 6 and a transmission main shaft 7; the movable guide rail 5 is arranged at the upper end of the scratch-pressing integrated workbench 1; the servo motor 6 is arranged at the left end of the movable guide rail 5; the transmission main shaft 7 is connected with the servo motor 6 and is used for driving the movable guide rail 5 to horizontally move so as to control the transverse movement of the scratch and mar integrated workbench 1, and the scratch system and the indentation system are arranged on the scratch and mar integrated workbench 1; the horizontal movement system is used for controlling the horizontal movement of the pressure and scratch integrated workbench 1 to a designated position of the rock sample, and performing a scratch experiment of designated horizontal displacement and speed on the surface of the rock sample according to experimental requirements; and is also used for horizontal positioning of the scratch test.
The multi-scale rock sample soft clamping system is used for carrying out surface non-destructive soft clamping on rock samples with different shapes, sizes and lengths; the method is also used for controlling the three-dimensional pressure of the rock sample to reach the preset stratum pressure, simulating the actual pressure of the oil reservoir and maintaining the stability of the pressure during the experiment; the multi-scale rock sample soft clamping system further comprises a multi-scale rock sample clamp 8, a hydraulic cylinder 9, a jacking device 10 and a soft clamping surface 11; the hydraulic cylinder 9 is arranged at the upper end of the scratch-pressing integrated workbench 1; the soft clamping surface 11 is distributed at the outer end of the rock sample; the jacking device 10 is arranged at the left end of the hydraulic cylinder 9, and the left end of the jacking device 10 is tightly attached to the rock sample and is used for clamping a datum plane.
The temperature control system is used for controlling the surface temperature of the rock sample to reach the preset stratum temperature, simulating the actual temperature of the oil reservoir and maintaining the stability of the temperature during the experiment; the temperature control system also comprises a heating insulation sleeve 12 and a temperature sensor 13; the heating insulation sleeve 12 is wrapped at the outer end of the multi-scale rock sample clamp 8 and is used for controlling the surface temperature of a rock sample to reach the preset stratum temperature, simulating the actual temperature of an oil reservoir and maintaining the temperature stability during the experiment.
The scratching system is used for controlling the scratching tool bit 2 to longitudinally move to the surface of the rock sample and positioning the initial longitudinal position; the device is also used for controlling the scratch tool bit 2 to move to a designated depth, carrying out subsequent scratch experiments by matching with a horizontal moving system, and automatically adjusting the width and the dip angle of the scratch tool bit according to the experiment requirements; the scratching system further comprises a lifting device 14, a scratching depth control device 15, a scratching load sensor 16 and a scratching tool bit 2; the lifting device 14 is arranged on the scratch pressing integrated workbench 1 and is used for controlling the scratch tool bit 2 to move to a rock sample reference surface; the scratch depth control device 15 is arranged on the scratch pressing integrated workbench 1, and a motor is arranged in the scratch depth control device 15 and used for controlling the scratch tool bit 2 to move to a set scratch depth; the scratch load sensor 16 is arranged at the lower end of the scratch depth control device 15 and is used for receiving stress data of the scratch bit 2; the scratch tool bit 2 is at scratch load sensor 16 lower extreme, and scratch tool bit 2 width and angle can adjust by oneself according to the experiment demand.
The indentation system is used for controlling the indentation tool bit 3 to longitudinally move to the surface of the rock sample and positioning the initial longitudinal position; the device is also used for controlling the indentation tool bit 3 to move to a designated depth, and the moving speed is automatically adjusted according to experimental requirements; the indentation system comprises an indentation depth control device 17, an indentation load sensor 18 and an indentation tool bit 3; the indentation depth control device 17 is arranged on the indentation and scratch integrated workbench 1, and a motor is arranged in the indentation depth control device 17 and used for controlling the indentation tool bit 3 to descend to the set indentation depth; the indentation load sensor 18 is arranged at the lower end of the indentation depth control device 17 and is used for receiving the stress condition of the indentation tool bit 3; the indentation tool bit 3 is arranged at the lower end of the indentation load sensor 18, and the specification of the indentation tool bit 3 can be adjusted automatically according to experimental requirements.
The mineral analysis system is used for carrying out continuous and nondestructive qualitative and quantitative mineral analysis on the surface of the rock sample, so as to analyze the mineral composition and proportion of different positions of the rock sample; and comparing and analyzing the mechanical parameter data measured by the rock sample scratch; the mineral analysis system comprises an XRD diffractometer 19, a powder collection tank 20; the XRD diffractometer 19 is arranged at the left end of the scratch tool bit 2 and is used for detecting the composition and proportion of rock sample powder minerals marked at different positions; a powder collection tank 20 is at the left end of the XRD diffractometer 19 for collecting sufficient scratched cuttings.
The data acquisition and transmission system is used for acquiring horizontal displacement, longitudinal displacement and three-dimensional stress of the scratch cutter head 2 and the indentation cutter head 3 and transmitting the acquired horizontal displacement, longitudinal displacement and three-dimensional stress to the computer terminal 4; the system is also used for collecting the surface temperature and the pressure of the rock sample and transmitting the collected surface temperature and the pressure to the computer terminal 4; the system is also used for collecting minerals and proportions at different positions of the rock sample and transmitting the minerals and proportions to the computer terminal 4; the data acquisition system comprises a horizontal displacement sensor 21 and a vertical displacement sensor 22 for measuring horizontal displacement and vertical displacement in indentation and scratch experiments, a pressure sensor 23 for measuring peripheral pressure born by a rock sample, and a data transmission cable 24 for transmitting displacement, load and mineral information of the rock sample; the displacement sensor is arranged at the inner ends of the scratch depth control device 15 and the indentation depth control device 17; the rock sample peripheral pressure sensor 23 is arranged at the inner end of the soft clamping surface 11; the data transmission cable 24 is connected to the computer terminal 4.
The data processing control system comprises a signal conditioning unit and a computer terminal 4; the signal conditioning unit is used for converting the acquired displacement, load and mineral information signals into digital signals; the computer terminal comprises computer hardware and control program software; computer hardware is used for calculating, controlling and storing digital signals; the control program software is connected with experimenters through a man-machine interaction interface and is used for coordination and command of a plurality of energy supplies of the in-situ environment centimeter-level shale scratch measurement experimental device.
The embodiment of the invention provides a shale mechanical property detection device, which comprises: the system comprises a pressure scratch executing system, a data acquisition system and a data processing control system, wherein the data processing control system is used for receiving the trigger operation of editing and completing the shale mechanical property test item, generating a shale mechanical property test task and controlling the pressure scratch executing system to execute the shale mechanical property test task on a shale sample to be tested; the data acquisition system is used for detecting a stress load value corresponding to an execution tool bit in the pressure scratch execution system in the execution process of the shale mechanical property test task and transmitting the stress load value to the data processing control system; the data processing control system is also used for receiving the stress load value, determining at least one shale mechanical property parameter value corresponding to the shale sample to be tested according to a preset test parameter and the stress load value in the shale mechanical property test task, and determining fracturing dessert corresponding to the shale sample to be tested based on the at least one shale mechanical property parameter value, so that the problems that an existing scratch device cannot conduct a test under the condition of in-situ temperature-pressure of a shale reservoir in the related art, the shale scratch test and the indentation test need to be conducted by two sets of equipment are solved, the effect of integrated measurement of shale scratch is achieved, the device cost and test space are saved, the determination accuracy and efficiency of the rock sample fracturing dessert can be improved, and the utilization rate of the reservoir rock sample is effectively improved.
Example two
Fig. 3 is a flowchart of a shale mechanical property detection method provided in the second embodiment of the present invention, and the method may be applied to the shale mechanical property detection apparatus provided in the foregoing embodiment. As shown in fig. 3, the method includes:
s210, receiving the editing completion triggering operation aiming at the shale mechanical property test item through the data processing control system, generating a shale mechanical property test task, and controlling the scratch execution system to execute the shale mechanical property test task on the shale sample to be tested.
S220, in the execution process of the shale mechanical property test task, detecting a stress load value corresponding to an execution tool bit in the scratch execution system through the data acquisition system, and transmitting the stress load value to the data processing control system.
S230, receiving a stress load value through a data processing control system, determining at least one shale mechanical property parameter value corresponding to the shale sample to be tested according to a preset test parameter and the stress load value in the shale mechanical property test task, and determining fracturing desserts corresponding to the shale sample to be tested based on the at least one shale mechanical property parameter value.
Wherein the at least one shale mechanical property parameter value comprises an elastic modulus value, a fracture toughness value and a hardness value; the fracturing dessert is a partial area in the shale sample to be tested, and the partial area meets preset construction standards.
Optionally, the shale mechanical property testing task comprises a shale indentation testing task; the stress load value comprises an indentation load value; the preset test parameters comprise preset indentation test parameters; the scoring executing system comprises a horizontal moving subsystem, a vertical moving subsystem and a scoring bit;
correspondingly, responding to a task execution instruction through a horizontal movement subsystem, controlling the indentation tool bit to move to a preset initial datum point corresponding to the shale sample to be tested, and controlling the indentation tool bit to horizontally move according to the preset indentation test parameter;
after the indentation tool bit moves to the preset initial reference point, performing initial longitudinal position positioning through a vertical movement subsystem, and controlling the indentation tool bit to process the shale sample to be tested according to the preset indentation experimental parameters;
and in the execution process of the shale indentation test task, acquiring an indentation load value corresponding to the indentation tool bit through the data acquisition system, and transmitting the indentation load value to the data processing control system.
Optionally, the indentation load value is received through a data processing control system, and an elastic modulus value corresponding to the shale sample to be tested is determined according to the preset indentation test parameter and the indentation load value.
Optionally, the shale mechanical property testing task comprises a shale scratch testing task; the stress load value comprises a scratch load value; the preset test parameters comprise preset scratch test parameters; the scratch pressing execution system comprises a horizontal movement subsystem, a vertical movement subsystem and a scratch cutter head;
correspondingly, responding to a task execution instruction through a horizontal movement subsystem, controlling the scratch tool bit to move to a preset initial datum point corresponding to the shale sample to be tested, and controlling the scratch tool bit to horizontally move according to the preset scratch test parameter;
after the scratch tool bit moves to a preset initial reference point corresponding to the shale sample to be tested, positioning an initial longitudinal position through the vertical movement subsystem, and controlling the scratch tool bit to process the shale sample to be tested according to the preset scratch test parameters;
and in the execution process of the shale scratch test task, acquiring a scratch load value corresponding to the scratch tool bit through the data acquisition system, and transmitting the scratch load value to the data processing control system.
Optionally, the scratch load value is received through the data processing control system, and a fracture toughness value and a hardness value corresponding to the shale sample to be tested are determined according to the preset scratch test parameter and the scratch load value.
Optionally, the data processing control system screens the elastic modulus value, the fracture toughness value and the hardness value according to preset screening criteria, and determines the fracturing dessert based on the screened elastic modulus value, fracture toughness value and hardness value.
Optionally, the apparatus further includes: a multi-scale rock sample soft clamping system; correspondingly, the method further comprises the steps of: and clamping the shale sample to be tested through a multi-scale rock sample soft clamping system, and controlling the three-dimensional pressure of the shale sample to be tested to reach preset stratum pressure.
Optionally, the apparatus further includes: a temperature control system; correspondingly, the method further comprises the steps of: and in the execution process of the shale mechanical property testing task, controlling the sample surface temperature of the shale sample to be tested to be maintained at a preset stratum temperature through the temperature control system.
Optionally, the apparatus further includes: a mineral analysis system; correspondingly, the method further comprises the steps of: and in the execution process of the shale mechanical property testing task, acquiring sample powder at a plurality of preset positions on the shale sample to be tested through the mineral analysis system, and detecting mineral compositions of the sample powder at the plurality of preset positions and composition ratios of each composition mineral.
According to the technical scheme provided by the embodiment, the data processing control system is used for receiving the trigger operation aiming at the editing of the shale mechanical property test item, generating a shale mechanical property test task, and controlling the scratch execution system to execute the shale mechanical property test task on the shale sample to be tested, further, in the execution process of the shale mechanical property test task, the data acquisition system is used for detecting the stress load value corresponding to the execution tool bit in the scratch execution system and transmitting the stress load value to the data processing control system, finally, the data processing control system is used for receiving the stress load value, determining at least one shale mechanical property parameter value corresponding to the shale sample to be tested according to the preset test parameter and the stress load value in the shale mechanical property test task, and determining the fracturing dessert corresponding to the shale sample to be tested based on the at least one shale mechanical property parameter value, so that the problems that the conventional scratch equipment cannot conduct tests under the condition of a shale reservoir in situ temperature-pressure condition, the shale scratch test and the scratch test are required to be conducted by two sets of equipment are solved, the cost and test space of the device are saved, and the accuracy of the reservoir sample utilization rate of rock fracture can be improved.
Claims (8)
1. Shale mechanical properties detection device, characterized in that includes: the system comprises a scratch execution system, a data acquisition system and a data processing control system, wherein,
the data processing control system is used for receiving the editing completion triggering operation aiming at the shale mechanical property test item, generating a shale mechanical property test task, and controlling the scratch pressing execution system to execute the shale mechanical property test task on a shale sample to be tested;
the data acquisition system is used for detecting a stress load value corresponding to an execution tool bit in the pressure scratch execution system in the execution process of the shale mechanical property test task and transmitting the stress load value to the data processing control system;
the data processing control system is further used for receiving the stress load value, determining at least one shale mechanical property parameter value corresponding to the shale sample to be tested according to preset test parameters in the shale mechanical property test task and the stress load value, and determining fracturing desserts corresponding to the shale sample to be tested based on the at least one shale mechanical property parameter value;
wherein the at least one shale mechanical property parameter value comprises an elastic modulus value, a fracture toughness value, and a hardness value; the fracturing dessert is a partial area in the shale sample to be tested, and the partial area meets a preset construction standard;
The scratch execution system is used for executing an indentation test and/or a scratch test for the shale sample to be tested; the executing tool bit is equipment which is in contact with the surface of the shale sample to be tested in the scratching executing system and is used for carrying out scratching test on the shale sample to be tested; the executing tool bit comprises an indentation tool bit and a scratch tool bit;
the shale mechanical property testing task comprises a shale indentation testing task; the stress load value comprises an indentation load value; the preset test parameters comprise preset indentation test parameters; the scoring executing system comprises a horizontal moving subsystem, a vertical moving subsystem and a scoring blade, wherein,
the horizontal movement subsystem is used for responding to a task execution instruction, controlling the indentation tool bit to move to a preset initial datum point corresponding to the shale sample to be tested, and controlling the indentation tool bit to horizontally move according to the preset indentation test parameter;
the vertical movement subsystem is used for carrying out initial longitudinal position positioning after the indentation tool bit moves to the preset initial reference point and controlling the indentation tool bit to process the shale sample to be tested according to the preset indentation experimental parameters;
The data acquisition system is used for acquiring an indentation load value corresponding to the indentation tool bit in the execution process of the shale indentation test task and transmitting the indentation load value to the data processing control system;
the shale mechanical property testing task comprises a shale scratch testing task; the stress load value comprises a scratch load value; the preset test parameters comprise preset scratch test parameters; the scoring executing system comprises a horizontal moving subsystem, a vertical moving subsystem and a scoring blade, wherein,
the horizontal movement subsystem is used for responding to a task execution instruction, controlling the scratch tool bit to move to a preset initial datum point corresponding to the shale sample to be tested, and controlling the scratch tool bit to horizontally move according to the preset scratch test parameter;
the vertical movement subsystem is used for positioning the initial longitudinal position after the scratch tool bit moves to a preset initial datum point corresponding to the shale sample to be tested, and controlling the scratch tool bit to process the shale sample to be tested according to the preset scratch test parameters;
the data acquisition system is used for acquiring the scratch load value corresponding to the scratch tool bit in the execution process of the shale scratch test task and transmitting the scratch load value to the data processing control system.
2. The device of claim 1, wherein the data processing control system is configured to receive the indentation load value and determine an elastic modulus value corresponding to the shale sample to be tested according to the preset indentation test parameter and the indentation load value.
3. The apparatus of claim 1, wherein the data processing control system is configured to receive the scratch load value and determine a fracture toughness value and a hardness value corresponding to the shale sample to be tested based on the pre-determined scratch test parameter and the scratch load value.
4. The apparatus of claim 1, wherein the data processing control system is configured to screen the elastic modulus value, the fracture toughness value, and the hardness value according to a preset screening criteria and determine a frac dessert based on the screened elastic modulus value, fracture toughness value, and hardness value.
5. The apparatus of claim 1, wherein the apparatus further comprises: a multi-scale rock sample soft clamping system, wherein,
the multi-scale rock sample soft clamping system is used for clamping the shale sample to be tested and controlling the three-dimensional pressure of the shale sample to be tested to reach preset formation pressure.
6. The apparatus of claim 1, wherein the apparatus further comprises: a temperature control system, wherein,
the temperature control system is used for controlling the sample surface temperature of the shale sample to be tested to be maintained at a preset stratum temperature in the execution process of the shale mechanical property testing task.
7. The apparatus of claim 1, wherein the apparatus further comprises: a mineral analysis system, wherein,
the mineral analysis system is used for acquiring sample powder at a plurality of preset positions on the shale sample to be tested in the execution process of the shale mechanical property test task, and detecting mineral composition of the sample powder at the plurality of preset positions and composition proportion of each composition mineral.
8. The shale mechanical property detection method is characterized by comprising the following steps of:
receiving an edit completion triggering operation aiming at a shale mechanical property test item through a data processing control system, generating a shale mechanical property test task, and controlling a scratch execution system to execute the shale mechanical property test task on a shale sample to be tested;
in the execution process of the shale mechanical property test task, detecting a stress load value corresponding to an execution tool bit in the scratch execution system through a data acquisition system, and transmitting the stress load value to the data processing control system;
Receiving the stress load value through the data processing control system, determining at least one shale mechanical property parameter value corresponding to the shale sample to be tested according to preset test parameters in the shale mechanical property test task and the stress load value, and determining fracturing desserts corresponding to the shale sample to be tested based on the at least one shale mechanical property parameter value; wherein the at least one shale mechanical property parameter value comprises an elastic modulus value, a fracture toughness value, and a hardness value; the fracturing dessert is a partial area in the shale sample to be tested, and the partial area meets a preset construction standard;
the scratch execution system is used for executing an indentation test and/or a scratch test for the shale sample to be tested; the executing tool bit is equipment which is in contact with the surface of the shale sample to be tested in the scratching executing system and is used for carrying out scratching test on the shale sample to be tested; the executing tool bit comprises an indentation tool bit and a scratch tool bit;
the shale mechanical property testing task comprises a shale indentation testing task; the stress load value comprises an indentation load value; the preset test parameters comprise preset indentation test parameters; the scoring executing system comprises a horizontal moving subsystem, a vertical moving subsystem and a scoring bit;
Correspondingly, responding to a task execution instruction through the horizontal movement subsystem, controlling the indentation tool bit to move to a preset starting datum point corresponding to the shale sample to be tested, and controlling the indentation tool bit to horizontally move according to the preset indentation test parameter;
after the indentation tool bit moves to the preset initial reference point, performing initial longitudinal position positioning through the vertical movement subsystem, and controlling the indentation tool bit to process the shale sample to be tested according to the preset indentation experimental parameters;
in the execution process of the shale indentation test task, acquiring an indentation load value corresponding to the indentation tool bit through the data acquisition system, and transmitting the indentation load value to the data processing control system;
the shale mechanical property testing task comprises a shale scratch testing task; the stress load value comprises a scratch load value; the preset test parameters comprise preset scratch test parameters; the scratch pressing execution system comprises a horizontal movement subsystem, a vertical movement subsystem and a scratch cutter head;
correspondingly, responding to a task execution instruction through the horizontal movement subsystem, controlling the scratch tool bit to move to a preset initial datum point corresponding to the shale sample to be tested, and controlling the scratch tool bit to horizontally move according to the preset scratch test parameter;
After the scratch tool bit moves to a preset initial reference point corresponding to the shale sample to be tested, positioning an initial longitudinal position through the vertical movement subsystem, and controlling the scratch tool bit to process the shale sample to be tested according to the preset scratch test parameters;
and in the execution process of the shale scratch test task, acquiring a scratch load value corresponding to the scratch tool bit through the data acquisition system, and transmitting the scratch load value to the data processing control system.
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