80 results about "Fracture type" patented technology

The invention discloses a tight sandstone gas reservoir logging scale fracture development evaluation method, and relates to the field of earth exploration physics, and the method comprises the steps: carrying out the inversion based on a complex pore structure high-angle fracture type rock physical model and actual logging data through employing a simulated annealing particle swarm algorithm, and obtaining two groups of fracture density parameters in a well; respectively calculating crack density identification factors under different rotation angles; based on a correlation coefficient between the Poisson impedance and the fracture density under different rotation angles, determining an optimal rotation angle when the correlation coefficient reaches a maximum value; calculating a crack density identification factor under the optimal rotation angle by combining longitudinal wave impedance and transverse wave impedance data; and applying the fracture density identification factor under the optimal rotation angle to actual logging data, and representing fracture development. The method can effectively distinguish and quantify multiple groups of high-angle fractures developed in the tight sandstone reservoir, significantly improve the prediction precision and reliability of the fractured reservoir, and provide a key basis for reservoir sweet spot prediction and well location deployment.

The invention discloses a three-section thighbone retrograde intramedullary nail, relates to the field of medical instruments, and provides a detachable and assembled three-section thighbone retrograde intramedullary nail aiming at the problems that an existing thighbone medial condyle retrograde intramedullary nail is poor in adaptability and insufficient in fixing strength. A main nail body of the intramedullary nail is composed of a head section, a middle section and a tail section, original spiral nested structures are adopted at the joints of the sections, and the three sections are tightly connected to form the complete and high-strength intramedullary nail by matching with the hollow interior design and penetrating a titanium cable into a medullary cavity for tightening and automatically rotating and matching the head section and the middle section of the main nail body. And medullary cavity structures and fracture types of different patients can be accurately matched. Compared with a traditional intramedullary nail, the intramedullary nail has the advantages that mounting convenience and structural stability are remarkably improved, intraoperative adjustment time can be shortened, the risk of injury to a medullary cavity of a patient is reduced, and an innovative solution is provided for personalized treatment of distal femur fractures.

The invention provides a GPR-based intelligent method for rock mass fracture distribution form identification and parameter inversion. The method comprises the following steps: a first stage: intelligently classifying fracture types; acquiring a ground penetrating radar B-scan image of the rock mass; data sets of different types of fractures are constructed, and intelligent classification of fracture types is realized by improving convolutional neural network (CNN) model training; a second stage: intelligently extracting fracture parameters; and based on the identified fracture distribution form, feature points on the B-scan image are extracted through deep learning, and then the position coordinates of the fracture are automatically calculated through a parameter inversion formula. The method is high in detection precision, strong in anti-interference performance and wide in engineering applicability.

The invention provides a fractured reservoir type evaluation method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining conventional logging information of a fractured reservoir, and solving the total porosity PorT, matrix porosity PorB and fracture porosity PorFra of the reservoir according to a conventional method; calculating a fracture reservoir development index RECP, and defining reservoir development levels (class I, class II and class III) through the RECP value; calculating a reservoir type main control factor index ZKYS, and defining fracture development characteristics (a high angle, a low angle and a medium-high angle) through the ZKYS; and establishing a reservoir type evaluation method through a cross plot technology. According to the method, quantitative evaluation of the fracture type is achieved by applying a conventional logging method, the coincidence rate is high compared with imaging logging, the logging interpretation evaluation level of the fractured reservoir is improved, and the application range and prospect are quite wide.

A fracture reduction mechanism for minimally invasive pelvic fracture surgery, comprising a support assembly, a drive assembly, a self-rotating clamping assembly, and a healthy side fixation assembly, wherein the drive assembly comprises a synchronous rotation module (21), a first ball screw module (22), a second ball screw module (23), a third ball screw module (24), and an arc guide rail module (33); the mechanism forms a frame-like closed structure through connection with an operating table (1) via bedside rails (2) on both sides of the operating table (1), the support assembly and healthy side fixation assembly are slidably connected with the bedside rails (2). By manually adjusting the linear movement distances and fixed-axis rotation angles of the above mechanism, six degrees of freedom translation and rotation of the pelvic fracture block can be achieved. The mechanism features high rigidity and load-bearing capacity, good portability, simple assembly and operation, high motion precision, and its motion center is a virtual point in space, the position of which can be adjusted according to patient position and fracture type, providing convenience for surgery.

The utility model discloses a test device for blocking rock fractures by soybean urease induced calcium carbonate deposition, which comprises a sample, a fracture simulation component and a slurry sealing component, and the sample consists of an upper rock test block and a lower rock test block; the fracture simulation assembly can simulate two kinds of rock fracture surfaces with different opening degrees. The test sample adopts an upper rock test block made of a transparent material to realize visualization in a test process; the upper shear box and the lower shear box are used for simulating a tension type fracture and a shear fracture surface of a rock, so that the condition that soybean urease induces calcium carbonate to deposit in different rock fracture generation mechanisms to block and reduce permeability of the rock fracture is better tested; when the lower shear box horizontally moves, the lower shear box is sealed through the slurry sealing assembly, and the sealing state can be kept in the shear dislocation of the crack; the device can test the relationship between the soybean urease induced calcium carbonate deposition plugging and permeation reducing effect and the rock fracture type and fracture parameters.

The invention is suitable for the technical field of geological monitoring, and provides a dangerous rock crack feature extraction method and system based on a live-action three-dimensional model, and the method comprises the following steps: carrying out the collection based on an oblique photography camera to obtain multi-view image data, and carrying out the collection based on a laser radar to obtain point cloud data; determining an oblique photography model based on the multi-view image data, determining a laser radar point cloud model based on the point cloud data, and obtaining a three-dimensional model of the dangerous rock area; performing crack identification on the three-dimensional model through an edge detection algorithm, and extracting crack types and crack geometric features through a deep learning algorithm; and geological background data are called, and a risk assessment index system is established according to the geological background data, the crack type and the crack geometric characteristics. According to the method, the high-precision live-action three-dimensional model is constructed, the limitation of a single data source on precision, details and coverage range is overcome through multi-source data fusion, and the integrity and accuracy of the three-dimensional model are remarkably improved.

The invention discloses a reservoir fracturing transformation fracture and stress joint inversion and effect evaluation method and system, and the method comprises the following steps: carrying out the real-time micro-seismic monitoring, and obtaining a micro-seismic data set; according to the obtained micro-seismic data set, fracture seismic source mechanism inversion is carried out, fracture pyrogenic dynamic fracture parameters of the reservoir space are obtained, the fracture rupture moment tensor is calculated through the dynamic fracture parameters, and the fracture rupture type is recognized according to the positive and negative characteristics of the fracture rupture moment tensor; carrying out stress inversion on the shear fracture through a fracture stress inversion method assumed by Bott for the shear fracture; carrying out stress inversion on the fractures of tension and compression fracture types by utilizing a corrected fracture stress inversion method; constructing a fracture instability coefficient model, and analyzing the instability of the fracture according to the seismic source of fracture and stress inversion data; an evaluation model of the fracture reservoir transformation effect is established through a multi-dimensional target reservoir transformation effect evaluation method, and the reservoir fracture transformation effect is quantitatively evaluated.

The invention belongs to the technical field of rock mass engineering and oil and gas resource development, and discloses a hydraulic fracture monitoring method based on pump injection curve fluctuation frequency. According to the hydraulic fracture monitoring method, in the on-site fracturing process, the expansion degree and the fracture type of the hydraulic fracture in the reservoir are preliminarily judged by comparing the fluctuation degree of the on-site pump injection curve monitored in real time with the fluctuation degree of the test pump injection curve. According to the corresponding relation between the fluctuation degree of the pumping curve and the hydraulic fracture obtained through the method, the expansion degree and the fracture type of the hydraulic fracture in a fracturing site can be economically and efficiently judged, and the problems that fracture monitoring in previous fracturing engineering is greatly influenced by the environment and high in cost are solved. Therefore, the method can reduce the time and economic cost of hydraulic fracture field monitoring, and provides reference for unconventional oil and gas exploitation design and evaluation.

The invention relates to a method for predicting fracture development laws of carbonate rocks with different lithologies, which comprises the following steps of: performing lithology division on a target layer of a research area, and analyzing fracture development characteristics with different lithologies; simulating fracture development conditions of different lithology under different confining pressures in different burial depth environments of the research area through a rock compression experiment to obtain fracture development laws of different lithology; identifying the lithology of each single well in the research area by using a well logging curve under core calibration to obtain a lithology interpretation result of each single well; the fracture development rules of different lithology are matched with the lithology interpretation result of each single well, and the fracture development condition of each single well target layer in the research area is obtained; and predicting the fracture development condition of the target stratum of the research area by utilizing a three-dimensional geologic modeling method according to the interpretation results of different lithology of the target stratum of each single well and the fracture development condition. According to the method, multiple means of actual petrology observation, indoor rock core experiments, well logging interpretation and three-dimensional modeling are combined, the development laws of carbonate rock fractures of different lithology on the ground and underground can be accurately predicted, a fractured reservoir development area can be found easily, and a reliable basis is provided for exploration deployment.

The invention provides a preoperative incision positioning device for spine minimally invasive surgery aiming at different fracture types, and belongs to the technical field of medical equipment. Comprising a mounting box, a notched gear ring is slidably connected into the mounting box, an adjusting mechanism used for adjusting the position of the notched gear ring is arranged in the mounting box, the two ends of the notched gear ring are fixedly connected with mounting bases respectively, and the lower end face of the mounting base on the upper side is fixedly connected with a detector; through the detector, the X-ray source and the positioning mechanism, real-time imaging of the spine of a patient is achieved, laser indication can be automatically conducted on an incision positioning point, medical staff can accurately position and mark the incision position, accurate positioning of the spine minimally invasive surgery incision is achieved, the positioning error is reduced, and the accuracy of the spine minimally invasive surgery incision is improved. The success rate and safety of the operation are improved, and the problems of poor positioning efficiency and precision in the prior art are solved.

The invention relates to the technical field of oil and gas field development, in particular to a shale gas well fracturing parameter optimization method and device based on pump stop pressure drop, and the method comprises the steps that fracturing construction parameters of a fracturing section are obtained; obtaining fracture network interpretation parameters and SRV parameters; obtaining production logging monitoring data of the fracturing section; according to the crack type of the fracturing section, the fracturing section is calibrated as a matrix section, a micro crack section and a bending section; the method comprises the following steps: respectively calling parameters for fracturing sections classified into a matrix section, a microfracture section and a bending section, forming an arrangement of two fracturing sections according to production logging monitoring data in the parameters and the numerical value of an SRV parameter, and screening out a plurality of fracturing sections located in a specified sorting interval in the two arrangements, and fracturing construction parameters are respectively used as preferable parameters of a matrix section, a microfracture section or a bending section. And subsequently, in a shale gas well fracturing section under the same geological background condition, fracturing parameter design can be carried out by referring to the optimal fracturing parameter range.

The application discloses a three-axis motion parallel reset mechanism for closed reset of a pelvic fracture, which comprises a sick side pelvic fracture reset robot and a healthy side fixing device, and the sick side pelvic fracture reset robot comprises a movable base, a three-axis moving device, a three-axis rotating device, a reset force detecting device and a sick side screw holding device. Through the above structure, six-degree-of-freedom translation and rotation of a fracture block can be realized, and the reset force change can be monitored in real time, thereby providing a guarantee for operation safety. The three-axis rotating device is connected in series through a U-shaped frame, has a smaller space occupation than a traditional ball pair, can be close to the upper surface of a human body during reset, has a short force arm and can provide a larger reset force. The robot has the advantages of compact structure, high precision, large load force, high flexibility, large working space, a spatial virtual point as a motion center, adjustable position according to a patient and a fracture type and convenient operation.

The invention discloses a fracturing crack type discrimination method and related equipment, and belongs to the technical field of oil exploitation, and the method comprises the steps: firstly, building a crack extension mode judgment model and a natural crack approximation angle range model according to ground stress parameters, rock strength parameters, imaging logging parameters and extension pressure judgment; according to the fracture extension mode judgment model, the fracture extension mode is judged, and then the fracturing fracture type is judged; when the fracture extension mode is judged to be a natural fracture activation mode, the type of a fracturing fracture is judged according to a natural fracture approximation angle range model; according to the method, an accurate crack extension mode and a natural crack approximation angle range model are constructed by integrating multi-dimensional parameters such as ground stress, rock strength, imaging logging and extension pressure, and the judgment precision of the fracturing crack type is effectively improved; the crack type is further refined by using the approximation angle range model, a more scientific and reasonable fracturing design basis is provided for oil and gas field development, the yield increasing effect is optimized, and the development cost is reduced.

The utility model relates to the technical field of bone fracture plates, and discloses a novel bone fracture plate which comprises a main plate, the bottom face of the main plate is fixedly connected with an extending assembly, and the two sides of the main plate are fixedly connected with fixing assemblies. According to the novel bone fracture plate, through the arrangement of the reinforcing assembly and the extending assembly, when the novel bone fracture plate is used, a patient additionally installs a reinforcing plate in the main plate according to the required situation, the reinforcing plate can be conveniently replaced by pulling a pull ring, the bone can be fixed and reinforced around the fracture part, the fracture part is prevented from shifting or deforming, stronger support is provided, and the fracture can be healed more quickly; meanwhile, the extrusion block is pressed, the extrusion block extrudes the limiting spring, the extension plate is pulled, the limiting spring resets from the interior of the limiting hole, and therefore the extension plate is limited and can be used for adjusting alignment of the fractures, the fractured parts can be better aligned and kept at the correct position, and the fracture positioning accuracy is improved. The requirements of different fracture types and severity degrees are met.

The invention discloses a method and system for determining the fracture evolution process of hard rock containing microfractures, and belongs to the technical field of rock mechanical testing. Digital speckle images of a DIC test observation surface of a hard rock sample in the loading process of an indoor mechanical test are collected in real time by determining the DIC test observation surface of the hard rock sample; by determining a surface displacement field of the hard rock sample, a displacement vector diagram of microscopic particle points of the digital speckle image is obtained, and the type of new cracks is judged; a plurality of displacement observation points are calibrated on the two sides of the native microfracture, and the fracture types of the displacement observation points are determined by judging whether tangential displacement and normal displacement of the displacement observation points are separated or not; and according to the type of the new crack and the fracture type of the displacement observation point, determining the dynamic evolution process of the native micro-crack under the stress condition. According to the method, the dynamic evolution process of cracks from initiation to expansion can be accurately represented, and then the internal correlation between the spatial geometric characteristics of crack distribution and the hard rock fracture evolution mechanism is disclosed.

This application provides a modular orthopedic device for fracture treatment, belonging to the field of orthopedic device technology. The device includes a fixation component, a locking component, and a connecting component. The fixation component has at least one first slot and at least one second slot, which communicate with each other. The locking component is accommodated within the first slot, and the connecting component is accommodated within the second slot and cooperates with the fixation component, allowing it to move or rotate relative to the fixation component. The locking component is used to lock the connecting component and the fixation component together. The connecting component can be a round rod, a polygonal rod, or a toothed connector, and the fixation component can include a toothed fixator, a ball-and-socket fixator, a ball-and-socket fixator, or a universal ball-and-socket fixator. This modular orthopedic device allows for flexible selection of component modules based on fracture type and soft tissue conditions, achieving precise, personalized, and minimally invasive fracture treatment, filling the technological gap between bone plate systems, intramedullary nail systems, and external fixation systems.

The present invention relates to a combined reconstruction bone plate comprising a reconstruction plate, a connecting plate, and connecting screws. The reconstruction plate is provided with screw holes, and at least one end of the connecting plate is provided with a connecting head, which is provided with a connecting hole. The connecting screw can be assembled into the connecting hole and connected to any screw hole in the reconstruction plate. The present invention can be used in any combination according to the fracture type to achieve fixation of different fracture types, ensuring surgical effectiveness and excellent versatility.

The invention provides a frequency-varying azimuth anisotropy seismic response characteristic analysis method for a complex fractured reservoir, and belongs to the technical field of oil and gas development, and the method comprises the steps: constructing an equivalent medium model which comprises a plurality of groups of vertical-vertical orthogonal fractures and is partially saturated with fluid in the fractures based on a Chapman multi-scale fractured medium theory; based on the model, frequency variation and azimuth anisotropy stiffness matrixes are deduced, the frequency variation azimuth stiffness matrix is embedded into the anisotropy reflectivity theory, and the PP wave frequency variation azimuth seismic forward modeling method is provided. And finally, respectively designing a single interface and thin layer reflection model, analyzing fracture geometric parameters (density, radius and porosity), partial saturated fluid parameters (saturation and plaque parameters), a PP wave frequency change reflection coefficient under a thin layer thickness change condition and a seismic azimuth response change rule thereof, and revealing control factors of frequency change azimuth response of the fractured reservoir. And a revolutionary numerical simulation method is provided for sweet spot prediction and fluid identification of the complex fractured reservoir.

The invention discloses an angle-adjustable orthopedic fracture fixing device, and belongs to the technical field of medical instruments, the orthopedic fracture fixing device comprises a telescopic rod, elastic clamping plates arranged at the two ends of the telescopic rod respectively, and universal structures arranged at the two ends of the telescopic rod respectively and connected with the correspondingly arranged elastic clamping plates; the connecting structure comprises a fixing plate arranged on the universal structure, a clamping plate arranged on the face, away from the universal structure, of the fixing plate and a locking bolt arranged on the fixing plate. According to the angle-adjustable orthopedic fracture fixing device, flexible switching between external fixation of the elastic clamping plate and internal fixation of the kirschner wire can be achieved through the connecting structure, different fracture types can be adapted without changing the whole device, the medical cost and the clinical operation difficulty are reduced, and the angle-adjustable orthopedic fracture fixing device is convenient to use through independent rotation locking of the elastic clamping plate and cooperation of the universal structure. The limb physiological angle and the fracture reduction requirement can be precisely met, and the use flexibility and the fixing precision of the device are further improved.

The invention discloses a novel intelligent steel plate screw internal fixing device and method.The novel intelligent steel plate screw internal fixing device comprises connecting steel plates, the connecting steel plates comprise straight plates and different plates, the connecting steel plates are provided with at least two screw holes in the length direction, concave-convex textures are arranged in the circumferential directions of the screw holes, and the two connecting steel plates are matched with each other through the concave-convex textures to limit relative rotation; the connecting screws comprise locking screws and lag screws, connecting holes are formed between adjacent screw holes, connecting parts are arranged on the supporting pieces and used for connecting the connecting holes, the supporting pieces are made of degradable materials, the modularized connecting steel plates are matched with the connecting screws to achieve an internal fixing system, and splicing type dynamic fine adjustment of the connecting steel plates and the connecting screws is achieved. The internal fixation shape and size can be flexibly adjusted according to different actual fracture conditions, so that the internal fixation device is suitable for various fracture types, especially complex or irregular fractures, and more accurate fixation force is provided for fracture parts.

The utility model provides a multi-row nail hole locking type metal bone fracture plate, which relates to the technical field of medical instruments and comprises a bone fracture plate a, a bone fracture plate b is symmetrically arranged on one side of the bone fracture plate a, an extension plate is fixedly connected to one end, close to the bone fracture plate b, of the bone fracture plate a, and a storage groove matched with the extension plate for use is formed in one side of the bone fracture plate b. The top and the bottom of the bone fracture plate a and the top and the bottom of the bone fracture plate b are each provided with two bone holding claws. The bone fracture plate a is pulled to drive the extension plate to move out of the storage groove, and then the bone fracture plate a and the bone fracture plate b are extended, so that the length of the bone fracture plate can be adjusted to better adapt to individual differences according to different bone sizes, fracture types and operation requirements of patients, and bolts are screwed out to relieve fixation of the sliding blocks; the bone holding claws are moved to drive the sliding blocks to move in the sliding grooves, so that the distance between the rib bone holding claws is adjusted according to the actual fracture condition, the sliding blocks are prevented from falling off from the sliding grooves through the arrangement of the guide blocks and the guide grooves, and the sliding blocks can move horizontally.

The present application relates to a kind of fracture type buried hill reservoir skin coefficient system decomposition method, comprising: step A.Combined with the calculation method of various types of dynamic and static skin coefficient of fracture type buried hill reservoir characteristics constitutes total skin;Step B.Based on the test data of test well, total skin coefficient of test well is obtained using pressure recovery well test interpretation method;Step C.According to the well condition of test well, the main dynamic and static skin coefficient constituting total skin coefficient of test well is determined;Step D.The method of step A is used to calculate the skin coefficient type determined in step C, to realize the skin decomposition of test well, and to clarify the composition of various skin coefficients of test well.The present application can accurately obtain the size of various skin coefficients of test well in fracture type buried hill reservoir, and provide guidance for further stimulation operation.

The invention relates to a method and a device for calculating a mass exchange coefficient between bedrock and a fracture in an underground reservoir, and belongs to the technical field of seepage simulation of fracture type underground reservoirs. The method for calculating the mass exchange coefficient between the bedrock and the fracture in the underground reservoir comprises the following steps: performing embedded grid division on a bedrock region and a fracture region in the underground reservoir, and determining a connection pair between a fracture grid and a bedrock grid; based on the permeability of the bedrock grid corresponding to the connection pair, determining a Green element function under a bedrock grid permeability main axis coordinate system; source item coordinates in the Green element function are used as variables, integration is conducted on the Green element function along the fracture grids belonging to the same connection pair, and a pressure response function is determined; and based on the pressure response function, determining the conductivity between the bedrock grid and the fracture grid corresponding to the connection pair. According to the method, the calculation precision of mass exchange between the bedrock and the fracture in seepage simulation of the embedded discrete fracture model can be remarkably improved.

The invention discloses a fracture development orientation prediction 90-degree ambiguity weakening method, electronic equipment, a storage medium and a fracture development orientation prediction 90-degree ambiguity weakening device. The method comprises the following steps: determining influence factors causing 90-degree fuzziness of fracture development orientation prediction based on an orientation elastic wave impedance equation; analyzing the influence factors based on a fracture orientation interpretation result of logging data or geological data and a fracture-induced orientation anisotropy model; and determining a strategy for weakening the 90-degree fuzziness of fracture development orientation prediction based on an analysis result. According to the method, starting from a root cause for generating fracture development orientation to predict 90-degree fuzziness, a mapping relation between a fracture orientation prediction result and fracture type reservoir geophysical parameters and combinations thereof is researched through model testing, and a strategy for weakening fracture development orientation to predict 90-degree fuzziness is determined through the mapping relation. Fracture orientation prediction with 90-degree ambiguity weakened is achieved, and reliability of fracture orientation seismic description is improved.

The invention belongs to the field of auxiliary medical treatment, and provides a sacroiliac screw implantation point and channel determination method and system, and the method comprises the steps: constructing a bone structure three-dimensional model containing the sacrum and the ilium; in the three-dimensional model, based on the fracture type and the bone condition of the patient, an implantation point of a screw is selected in the sacrum S1 centrum trailing edge area, and the implantation point is located on the outer side of sacrum cortex and close to the sacroiliac joint trailing edge; in the three-dimensional model, a cross section containing the implantation point is selected as a plane where an implantation channel is located, and the cross section is an image plane perpendicular to the long axis of the body of the patient and serves as a space projection plane of the implantation channel; in the three-dimensional model, a screw path penetrating through the sacrum body or the sacroiliac joint area is constructed, the included angle between the implantation channel path and the coronal plane of the patient is measured, the included angle is used for controlling the front-back inclination degree of the screw implantation direction, and the implantation point, the cross section and the included angle jointly define a three-dimensional channel of the sacroiliac screw.

Disclosed in the present invention is a tandem-type three-axis motion reduction robot for closed reduction of pelvic fracture, comprising an affected side pelvic fracture reduction robot and a healthy side fixing apparatus. The affected side pelvic fracture reduction robot comprises a movable base, a three-axis moving apparatus, a three-axis rotating apparatus, a reduction force detection apparatus, and an affected side screw holding apparatus. By means of the above structure, six-degree-of-freedom translation and rotation of a fracture block can be achieved, and the change of the reduction force is monitored in real time, thereby providing a guarantee for surgical safety. The three-axis rotating apparatus is connected in series by means of a U-shaped frame, occupies a smaller space than a traditional ball pair, can be close to the upper surface of a human body during reduction, and has a short force arm, such that a larger reduction force can be provided. The robot features compact structure, high precision, large loading force, high flexibility, and large working space; the motion center of the robot is a spatial virtual point, the position is adjustable according to patients and fracture types, and thus the operation is convenient.

The invention relates to a formation fracturing type and fracturing performance analysis method and device and a storage medium, and relates to the technical field of oil exploration and development, and the method comprises the following steps: obtaining detection data of a target formation; calculating the hole friction according to the detection data; the theoretical critical fracture stress is calculated through the internal friction angle and cohesive force of the target stratum; calculating a theoretical critical fracture stress by using the pore pressure and the hole friction resistance of the target stratum; the stratum fracturing type is judged according to the theoretical critical fracture stress; according to the judged formation fracturing type, determining the maximum critical fracturing stress and the minimum critical fracturing stress, corresponding to the formation fracturing type, in a block where the target formation is located; and calculating fracturing evaluation parameters of the target stratum by using the maximum critical fracture stress, the minimum critical fracture stress and the critical fracture stress. Through the content of the invention, the fracture type can be determined according to the stratum condition, the stratum fracturing performance can be accurately predicted, the exploration and development cost is reduced, and the stratum development efficiency is improved.

The invention discloses a thoracolumbar vertebra fracture detection method and system based on sequence modeling and a prior graph, and the method comprises the steps: obtaining thoracolumbar vertebra CT volume data and fracture type truth value label data, carrying out the preprocessing, and constructing a training set and a test set; and constructing a fracture detection multi-branch classification network model, training and testing the constructed fracture detection multi-branch classification network model by using the training set and the test set, preprocessing thoracolumbar vertebra CT body data of a to-be-detected patient, inputting the preprocessed thoracolumbar vertebra CT body data into the trained fracture detection multi-branch classification network model, and outputting a fracture type classification prediction result. By designing an end-to-end framework of an image feature branch, a label relation branch and a branch fusion module, the problems that in the prior art, continuity of a vertebral body structure is deficient, long-range dependence is insufficient, feature fusion is insufficient and the like are solved, and accurate detection and refined classification of thoracolumbar vertebral fractures are achieved.

The invention relates to the technical field of orthopedic trauma operation internal fixation, and discloses an orthopedic reduction nail locking device which comprises a first steel plate and a second steel plate which are symmetrically arranged. A plurality of groups of local threaded holes are formed in the first steel plate and the second steel plate, and screws are arranged on the local threaded holes; the orthopedic reduction screw locking device has the remarkable advantages that screws are accurately matched with local threaded holes, positioning is achieved through the conical bottom, screw deviation is eradicated, and pressurization failure and harmful stress are avoided; the independent pressurization moving assembly is matched with the L-shaped limiting plate, pressurization force transmission is uniform and controllable, and it is guaranteed that the fracture broken end is accurately attached and stably fixed; local threaded holes can be vertically or obliquely designed to adapt to different fracture types, the hexagonal groove design enables operation to be convenient and labor-saving, operation difficulty is greatly reduced, and a safe and efficient fixing scheme is provided for orthopedic trauma operations.