Abstract: The present application provides an apparatus and a method for measuring apparent permeability of a tight rock core, the apparatus comprises: a rock core holder, a first high-pressure injection pump, a second high-pressure injection pump, a micro-differential pressure meter, a micro-flow meter, a first pressure control unit, a second pressure control unit, a first valve, a second valve, a third valve, and a fourth valve; the first pressure control unit comprises: a first pressure-resistant piston container and a second pressure-resistant piston container, both of which are divided into an upper cavity and a lower cavity by a piston, the upper cavities of the first pressure-resistant piston container and the second pressure-resistant piston container are filled with gases and communicate with each other, and the lower cavity of the first pressure-resistant piston container is filled with pump pressure-transmission liquids, and the lower cavity of the second pressure-resistant piston container is filled with ex

Abstract: A high-temperature, high-pressure, and low-velocity gas microtube viscosity measuring apparatus that comprises a thermotank, a fluid filtering and measuring device, a micro-pressure difference metering device, and a data acquisition and processing system. The fluid filtering and measuring device includes a filter, a microtube connector, a flow rate measuring liquid storage tank, an automatic micro-flow rate metering device, and an intermediate container connected in series via pipelines. The micro-pressure difference metering device is connected at two ends to pipelines at the two ends of the microtube connector via detection pipelines. The data acquisition and processing system is electrically connected to the micro-pressure difference metering device and the automatic micro-flow rate metering device to receive pressure difference data and flow rate data.

Abstract: A high-temperature, high-pressure, and low-velocity gas microtube viscosity measuring apparatus that comprises a thermotank, a fluid filtering and measuring device, a micro-pressure difference metering device, and a data acquisition and processing system. The fluid filtering and measuring device includes a filter, a microtube connector, a flow rate measuring liquid storage tank, an automatic micro-flow rate metering device, and an intermediate container connected in series via pipelines. The micro-pressure difference metering device is connected at two ends to pipelines at the two ends of the microtube connector via detection pipelines. The data acquisition and processing system is electrically connected to the micro-pressure difference metering device and the automatic micro-flow rate metering device to receive pressure difference data and flow rate data.

Abstract: The present application provides an apparatus and a method for measuring apparent permeability of a tight rock core, the apparatus comprises: a rock core holder, a first high-pressure injection pump, a second high-pressure injection pump, a micro-differential pressure meter, a micro-flow meter, a first pressure control unit, a second pressure control unit, a first valve, a second valve, a third valve, and a fourth valve; the first pressure control unit comprises: a first pressure-resistant piston container and a second pressure-resistant piston container, both of which are divided into an upper cavity and a lower cavity by a piston, the upper cavities of the first pressure-resistant piston container and the second pressure-resistant piston container are filled with gases and communicate with each other, and the lower cavity of the first pressure-resistant piston container is filled with pump pressure-transmission liquids, and the lower cavity of the second pressure-resistant piston container is filled with ex

Abstract: A high pressure dynamic micro differential pressure gauge, and methods for using and checking the same. The high pressure dynamic micro differential pressure gauge comprises a set of vertical manometer tubes in communication with each other, where one or more manometer tubes are connected to a resistance meter through signal lines, and the resistance meter is connected to a data collection and processing control system. Each manometer tube is full of low conductivity buffer liquid and high conductivity manometric liquid. The resistance meter is configured to measure resistances in the one or more manometer tubes, and the data collection and processing control system is configured to convert the resistances measured by the resistance meter into a differential pressure.

Abstract: A high pressure dynamic micro differential pressure gauge, and methods for using and checking the same. The high pressure dynamic micro differential pressure gauge comprises a set of vertical manometer tubes in communication with each other, where one or more manometer tubes are connected to a resistance meter through signal lines, and the resistance meter is connected to a data collection and processing control system. Each manometer tube is full of low conductivity buffer liquid and high conductivity manometric liquid. The resistance meter is configured to measure resistances in the one or more manometer tubes, and the data collection and processing control system is configured to convert the resistances measured by the resistance meter into a differential pressure.