A rock sample is nano-indented from a surface of the rock sample to a specified depth less than a thickness of the rock sample. While nano-indenting, multiple depths from the surface to the specified depth and multiple loads applied to the sample are measured. From the multiple loads and the multiple depths, a change in load over a specified depth is determined, using which an energy associated with nano-indenting rock sample is determined. From a Scanning Electron Microscope (SEM) image of the nano-indented rock sample, an indentation volume is determined responsive to nano-indenting, and, using the volume, an energy density is determined. It is determined that the energy density associated with the rock sample is substantially equal to energy density of a portion of a subterranean zone in a hydrocarbon reservoir. In response, the physical properties of the rock sample are assigned to the portion of the subterranean zone.

A glass product stress evaluation system is provided. The glass product stress evaluation system includes a background light source to selectively transmit light of different wavelengths and illuminates a glass product. An imaging device is mounted in proximity to the glass product and develops digitally encoded representations of internal annealing stresses formed within the glass product. The imaging device converts the digitally encoded internal stress representations into digital signals. A plurality of optical devices provides a converging view of the glass product. A plurality of filters is mounted in proximity to the plurality of optical devices and selectively transmits light of different wavelengths to the optical devices, thereby transforming detected imaged stresses in the glass product into visible colors. A processing unit receives the digital images from the imaging device and converts the digital images into visible images. The digital images can be classified into annealing grades.

A system and method for performing a tear test are described herein. The system may include a fixed clamping station configured to hold a first portion of a film specimen and a movable clamp coupled to an actuator, the movable clamp may be configured to hold a second portion of the film specimen. The movable clamp may be configured to move in a direction away from the fixed clamping station to tear the film specimen. The system may include a slitter blade configured to cut the film specimen at a location between the fixed clamping station and the movable clamp. The system may include a load cell coupled to one of the fixed clamping station and the movable clamp. The load cell may be configured to measure a force associated with tearing of the film specimen. The actuator may be configured to manipulate the movable clamp along a trajectory.

The invention relates to a selection method of loss control materials for lost circulation control in fractured reservoirs based on photoelastic experiments. By using the photoelastic material to simulate rigid lost circulation material, obtaining photoelastic images and load curves during a loading process of plugging zones formed by the lost circulation material, selecting the lost circulation material according to structure stability of plugging zones. Based on a relationship between structures and performances and granular matter mechanics, the present method is with high reliable to duly observe distribution and evolution of internal forces in a pressure-bearing process of plugging zones, reveal an instability mechanism of the plugging zone, and optimize the lost circulation material in a targeted manner; the present disclosure based on mesoscopic structure characterization of plugging zones is for a new idea for material selection of deep fractured reservoirs, of good repeatability, simple operation and low economic cost.

A rock sample is nano-indented from a surface of the rock sample to a specified depth less than a thickness of the rock sample. While nano-indenting, multiple depths from the surface to the specified depth and multiple loads applied to the sample are measured. From the multiple loads and the multiple depths, a change in load over a specified depth is determined, using which an energy associated with nano-indenting rock sample is determined. From a Scanning Electron Microscope (SEM) image of the nano-indented rock sample, an indentation volume is determined responsive to nano-indenting, and, using the volume, an energy density is determined. It is determined that the energy density associated with the rock sample is substantially equal to energy density of a portion of a subterranean zone in a hydrocarbon reservoir. In response, the physical properties of the rock sample are assigned to the portion of the subterranean zone.

The disclosure herein discloses an imaging method of internal defects in longitudinal sections of trees, and belongs to the field of nondestructive testing of trees. The method includes the following steps: with the propagation time of stress waves in a tree as input data, dividing an imaging plane into a predetermined number of grid cells to establish initial velocity distribution in the imaging plane; then performing multiple iterations using a linear propagation model; following each iteration, adjusting the velocity distribution in the imaging plane using the SIRT algorithm; constraining the velocity of each grid cell using maximum and minimum velocity constraints and fuzzy constraints based on grid cell groups, and ending iteration until the final velocity distribution is in good fit with the measured data; by comparing the velocity value of the grid cell at this moment with the reference value of the tested healthy tree, determining an abnormal grid cell; and then performing secondary smoothing processing on the grid cell imaging to obtain the defect location inside the tree. The method can accurately detect the defective area of the tree, and has less false detection areas and good imaging effect.

A glass product stress evaluation system is provided. The glass product stress evaluation system includes a background light source to selectively transmit light of different wavelengths and illuminates a glass product. An imaging device is mounted in proximity to the glass product and develops digitally encoded representations of internal annealing stresses formed within the glass product. The imaging device converts the digitally encoded internal stress representations into digital signals. A plurality of optical devices provides a converging view of the glass product. A plurality of filters is mounted in proximity to the plurality of optical devices and selectively transmits light of different wavelengths to the optical devices, thereby transforming detected imaged stresses in the glass product into visible colors. A processing unit receives the digital images from the imaging device and converts the digital images into visible images. The digital images can be classified into annealing grades.

A method and system for analyzing a physical characteristic of a film sample are described herein. The system may include a material holder system configured to hold the film sample. The system may include a tensile testing system configured to stretch the film sample and determine a physical characteristic of the film sample. The system may include a movable system coupled to the material holder system and configured to move the held film sample to be analyzed or tested between stations. The movable system is configured to move the held film sample in the material holder system to the tensile testing system.

A method and a system for analyzing a physical characteristic of a film sample are described herein. The system includes a material holder system configured to hold the film sample; and a tear analysis device configured to tear the film sample and measure a characteristic of the tear. The movable system is configured to move the film sample in the material holder system to the tear analysis device.

A rock sample is nano-indented from a surface of the rock sample to a specified depth less than a thickness of the rock sample. While nano-indenting, multiple depths from the surface to the specified depth and multiple loads applied to the sample are measured. From the multiple loads and the multiple depths, a change in load over a specified depth is determined, using which an energy associated with nano-indenting rock sample is determined. From a Scanning Electron Microscope (SEM) image of the nano-indented rock sample, an indentation volume is determined responsive to nano-indenting, and, using the volume, an energy density is determined. It is determined that the energy density associated with the rock sample is substantially equal to energy density of a portion of a subterranean zone in a hydrocarbon reservoir. In response, the physical properties of the rock sample are assigned to the portion of the subterranean zone.