Methods, systems, and computer-readable medium to perform operations for identifying fracture barriers in a well. The operations include converting rebound hardness values of a rock specimen from the well to unconfined compressive strength (UCS) values, where each of the rebound hardness values corresponds to a respective coordinate of a measurement grid imposed on the specimen. The operations further include, for each column of the grid, plotting the UCS values versus depth. Further, the operations include mapping, based on a maximum UCS value and a minimum UCS value, a relative strength contour plot for the specimen. Yet further, the operations include mapping, based on a fixed strength range, an absolute strength contour plot for the specimen. In addition, the operations include determining, based on the relative strength contour, the absolute strength contour, and mineralogy of the rock specimen, that the rock specimen is indicative of a fracture barrier in the well.

Methods, systems, and computer-readable medium to perform operations for identifying fracture barriers in a well. The operations include converting rebound hardness values of a rock specimen from the well to unconfined compressive strength (UCS) values, where each of the rebound hardness values corresponds to a respective coordinate of a measurement grid imposed on the specimen. The operations further include, for each column of the grid, plotting the UCS values versus depth. Further, the operations include mapping, based on a maximum UCS value and a minimum UCS value, a relative strength contour plot for the specimen. Yet further, the operations include mapping, based on a fixed strength range, an absolute strength contour plot for the specimen. In addition, the operations include determining, based on the relative strength contour, the absolute strength contour, and mineralogy of the rock specimen, that the rock specimen is indicative of a fracture barrier in the well.

An apparatus for performing a contact mechanics test in a substrate includes a stylus having at least two contact elements. Each contact element has a contact profile, and the contact elements are disposed in the stylus to define a stretch passage therebetween. The stylus is configured to deform the substrate so as to cause the substrate to flow between the contact elements and induce tension in the substrate in order to generate and preserve micromodifications in the substrate. Methods of performing a contact mechanics test using the apparatus are also provided.

An apparatus for performing a contact mechanics test in a substrate includes a stylus having at least two contact elements. Each contact element has a contact profile, and the contact elements are disposed in the stylus to define a stretch passage therebetween. The stylus is configured to deform the substrate so as to cause the substrate to flow between the contact elements and induce tension in the substrate in order to generate and preserve micromodifications in the substrate. Methods of performing a contact mechanics test using the apparatus are also provided.

A controller of a hardness tester can determine, in a condition where a driver is not in operation and when a spring displacement detector and an arm displacement detector detect an amount of displacement of respective objects (plate spring and loading arm), that a loading arm and a plate spring are deformed according to changes in environmental temperature. A favorable hardness test can be performed by the hardness tester corresponding to the environmental temperature according to the determination by carrying out an initialization process that resets the displacement amount of respective object to zero, the displacement amount detected by the spring displacement detector and the arm displacement detector respectively.

A controller of a hardness tester can determine, in a condition where a driver is not in operation and when a spring displacement detector and an arm displacement detector detect an amount of displacement of respective objects (plate spring and loading arm), that a loading arm and a plate spring are deformed according to changes in environmental temperature. A favorable hardness test can be performed by the hardness tester corresponding to the environmental temperature according to the determination by carrying out an initialization process that resets the displacement amount of respective object to zero, the displacement amount detected by the spring displacement detector and the arm displacement detector respectively.

The disclosure discloses a micro-nano indentation testing device and method. A lower end of an upright post is fixedly connected to a base, a top support plate is fixedly connected to an upper end of the upright post, a precise pressing device is fixedly connected to the top support plate; a load detection module is fixedly connected to the lower end of the output shaft, an elastic element is sleeved on the output shaft, and two ends of the elastic element respectively press against the precise pressing device and the load detection module; the displacement detection module is fixedly connected to the lower end of the load detection module, an indenter fixer is fixedly connected to the lower end of the displacement detection module and used for fixedly mounting an indenter; and a stage is fixedly connected to the base and used for fixedly mounting a sample.

An apparatus includes a holder to support an indenter relative to a sample, a depth sensor, and a controller. The operations include applying a first force on the sample with the indenter and determining a first depth of the indenter based on data generated by the sensor, moving the indenter from the first depth to a greater predetermined depth, then applying the first force on the sample with the indenter and determining a second depth of the indenter based on second data generated by the sensor, and determining a value indicative of hardness of the sample based on a difference between the first depth and the second depth. The apparatuses described can use a single scale for hardness that enables hardness values for different materials to be compared to one another.

A method of imaging a sample containing a target mineral species is provided. The method includes probing the sample with a pump beam and a Stokes beam having a tunable frequency difference, and detecting an optical response of the sample resulting from a transfer of said modulation between the pump beam and the Stokes beam. The probing is scanned spatially and spectrally, thereby obtaining hyperspectral data. Correlation with a known Raman resonance of the mineral species and with anon Raman-resonant contribution to said optical response allows building an image of the sample mapping different species within the sample.

Methods, systems, and computer-readable medium to perform operations for identifying fracture barriers in a well. The operations include converting rebound hardness values of a rock specimen from the well to unconfined compressive strength (UCS) values, where each of the rebound hardness values corresponds to a respective coordinate of a measurement grid imposed on the specimen. The operations further include, for each column of the grid, plotting the UCS values versus depth. Further, the operations include mapping, based on a maximum UCS value and a minimum UCS value, a relative strength contour plot for the specimen. Yet further, the operations include mapping, based on a fixed strength range, an absolute strength contour plot for the specimen. In addition, the operations include determining, based on the relative strength contour, the absolute strength contour, and mineralogy of the rock specimen, that the rock specimen is indicative of a fracture barrier in the well.