Disclosed is water-absorbent resin particles, in which a value of non-pressurization DW after 3 minutes is 14 ml/g or more, and a value of liquid suction power after 3 minutes measured by the following method is 11 ml/g or more. A liquid suction power measurement method: 0.3 g of the water-absorbent resin particles is uniformly dispersed in a cylindrical container having a mesh-like bottom and having an inner diameter of 26 mm; the cylindrical container is placed in a container containing 40 g of a physiological saline solution, the water-absorbent resin particles are caused to absorb the physiological saline solution for 30 minutes from the bottom of the cylindrical container, and thereby a swollen gel is obtained; and non-pressurization DW, which is measured in a state where another 0.3 g of the water-absorbent resin particles is uniformly dispersed on the swollen gel in the cylindrical container, is defined as liquid suction power.

A high-pressure flow-circulating hydrogen permeation test device and method, including: a base, and an autoclave body and a compressor being fixedly arranged on the base, wherein a side wall of the autoclave body is fixedly provided with a sample clamp, a first end of the sample clamp is clamped with a sample and extends into the interior of the autoclave body, a second end of the sample clamp is fixedly provided with a hydrogen permeation test device, an interior of the sample clamp is communicated with the hydrogen permeation test device, the hydrogen permeation test device contains an electrolyte in contact with the sample, and a gas inlet and a gas outlet of the autoclave body are both connected with the compressor through pipelines.

A high-pressure flow-circulating hydrogen permeation test device and method, including: a base, and an autoclave body and a compressor being fixedly arranged on the base, wherein a side wall of the autoclave body is fixedly provided with a sample clamp, a first end of the sample clamp is clamped with a sample and extends into the interior of the autoclave body, a second end of the sample clamp is fixedly provided with a hydrogen permeation test device, an interior of the sample clamp is communicated with the hydrogen permeation test device, the hydrogen permeation test device contains an electrolyte in contact with the sample, and a gas inlet and a gas outlet of the autoclave body are both connected with the compressor through pipelines.

Disclosed is a method and device for determining the surfactant concentration for oil displacement by imbibition. The method includes the following steps: providing a tank for holding the surfactant solution and a capillary tube; adding the surfactant solution with a first preset concentration into the tank; injecting crude oil into the capillary tube, a liquid level difference H is generated between a liquid level of the capillary tube and the liquid level of the tank; recording data of the H varying over time, and calculating an imbibition dynamic and resistance ratio of the surfactant solution with the first preset concentration based on the data; repeating the steps for each surfactant solution with different concentration; and determining the optimal concentration under the best oil displacement effect of the surfactant solution based on the imbibition dynamic and resistance ratios of the surfactant solutions with different concentration.

Disclosed is a method and device for determining the surfactant concentration for oil displacement by imbibition. The method includes the following steps: providing a tank for holding the surfactant solution and a capillary tube; adding the surfactant solution with a first preset concentration into the tank; injecting crude oil into the capillary tube, a liquid level difference H is generated between a liquid level of the capillary tube and the liquid level of the tank; recording data of the H varying over time, and calculating an imbibition dynamic and resistance ratio of the surfactant solution with the first preset concentration based on the data; repeating the steps for each surfactant solution with different concentration; and determining the optimal concentration under the best oil displacement effect of the surfactant solution based on the imbibition dynamic and resistance ratios of the surfactant solutions with different concentration.

The provided is an experimental apparatus and method for shale supercritical synergistic penetration and imbibition based on damping vibration, including a reaction autoclave; a damping vibration measurement device, used for measuring the weight of a rock sample; a temperature control device, used for heating and cooling the internal environment of the reaction autoclave; a pressure control device, disposed on the reaction autoclave lid; a water level control device, disposed on the upper inner wall of the reaction autoclave body; a conductivity testing device, disposed on the inner bottom of the reaction autoclave body; and a data processing device, disposed on the reaction autoclave body, used for receiving and processing signals transmitted from the damping vibration measurement device, temperature control device, pressure control device, water level control device, and conductivity testing device.

In a first aspect the present invention relates to a system for continuous measurement of osmolarity in situ. Said system comprises phase-separated membrane enclosed compartment as the sensor in osmolarity; detection means: a processing unit, and, optionally, an output unit of absolute or relative osmolarity and/or osmolarity changes. Further, the use of the phase-separated membrane enclosed compartment, whereby the membrane is permeable to a solvent and non-permeable to the osmotically active substance for non-invasive osmolarity measurement in a liquid system is described. In addition, a method for determining osmolarity and/or osmolarity change in a system is provided including the phase-separated membrane enclosed compartment, whereby the membrane is a permeable to a solvent and non-permeable to the osmotically active substance. Finally, a set of phase-separated membrane enclosed compartment, whereby the membrane is permeable to a solvent and non-permeable to the osmotically active substance, having predetermined different inner osmolarities useful for calibrations of osmolarity of an osmolarity measuring system is disclosed.

In a first aspect the present invention relates to a system for continuous measurement of osmolarity in situ. Said system comprises phase-separated membrane enclosed compartment as the sensor in osmolarity; detection means: a processing unit, and, optionally, an output unit of absolute or relative osmolarity and/or osmolarity changes. Further, the use of the phase-separated membrane enclosed compartment, whereby the membrane is permeable to a solvent and non-permeable to the osmotically active substance for non-invasive osmolarity measurement in a liquid system is described. In addition, a method for determining osmolarity and/or osmolarity change in a system is provided including the phase-separated membrane enclosed compartment, whereby the membrane is a permeable to a solvent and non-permeable to the osmotically active substance. Finally, a set of phase-separated membrane enclosed compartment, whereby the membrane is permeable to a solvent and non-permeable to the osmotically active substance, having predetermined different inner osmolarities useful for calibrations of osmolarity of an osmolarity measuring system is disclosed.