3 results about "Chamber experiment" patented technology

A method for determining the water-drive initiation pressure in low-permeability reservoirs relates to the field of oil and gas field development technology, solving the problems of unstable, inconsistent, and difficult-to-apply initiation pressure results obtained by existing indoor experimental measurements and field indicator curve testing methods. The method includes the following steps: S1: Obtain basic data on the low-permeability reservoir in the study area; S2: Obtain the initiation pressure of mercury using mercury intrusion porosimetry (MIP) curves; S3: Based on the initiation pressure of mercury from the core, obtain the initiation pressure of mercury below the injection-production well distance; S4: Based on the obtained initiation pressure of mercury below the injection-production well distance, convert the initiation pressure of mercury below the injection-production well distance into the initiation pressure of water. This method for determining the water-drive initiation pressure in low-permeability reservoirs can reduce the influence of experimental instrument accuracy and eliminate the influence of testing under field conditions, obtaining a relatively stable, more consistent, and more practical initiation pressure value, facilitating the application of seepage theory research and various field scheme designs.

The present application relates to the technical field of oilfield production engineering, and particularly relates to a wellbore plugging agent evaluation method and a wellbore sealing integrity evaluation device. The present application mainly solves the problem that the existing wellbore plugging agent evaluation method cannot evaluate the performance of the plugging agent under the working conditions of high pressure, high CO2 and other acid gas wells. The present application comprises the following steps: selecting a plurality of plugging agents with different formulations according to the working conditions of the experimental area, and respectively performing basic performance testing, injection performance testing, interfacial cementation strength evaluation and corrosion performance evaluation; performing long-term corrosion resistance experiment on the plugging agent; and using the wellbore sealing integrity evaluation device to perform full-size wellbore sealing integrity evaluation experiment on the plugging agent. The wellbore plugging agent evaluation method optimizes different plugging agents through laboratory experiments, and simulates the actual production conditions through full-size experiments, so as to finally screen out the plugging agent that meets the field working conditions, thereby providing guarantee for efficient treatment of gas wells.

The application provides an experimental device and method for multi-crack stress distribution visualization. The experimental device comprises a photoelastic experimental mechanism, a three-way stress loading mechanism, a horizontal stress clamping mechanism and a crack body internal pressure maintaining mechanism. The horizontal stress clamping mechanism adopts four numerical control hydraulic clamping components which are uniformly distributed around the experimental specimen to maintain stress loading of the experimental specimen in two mutually perpendicular horizontal directions. The crack body internal pressure maintaining mechanism can maintain the internal pressure in the cracks of the experimental specimen. The experimental method adopts the experimental device for multi-crack stress distribution visualization to carry out experiments. The beneficial effects of the application include: the stress distribution and stress interference of multiple cracks under the conditions of triaxial stress and internal pressure in the cracks can be realized in indoor experimental research.