Abstract: Disclosed is a method for determining the dynamic adsorption retention of polymer capsules, belonging to the technical field of oil and gas field development engineering, which includes: (1) carrying out a thermal aging experiment to establish relational expressions between a capsule concentration and an aging time, as well as a polymer release concentration and the aging time; (2) setting up a polymer capsule displacement experimental device to determine the release concentration of polymers in effluent; (3) releasing polymers encapsulated by capsules in the effluent to acquire a total adsorption retention of polymers in a porous medium; and (4) inverting respective adsorption retentions of the capsule particles and the polymers in the porous medium.

Abstract: A system for stereoscopic and real-time monitoring of an ocean methane profile includes a waterborne communication floating body, a gravity anchor, and a monitoring mechanism disposed therebetween, wherein the monitoring mechanism includes a submarine methane leakage intensity monitoring apparatus, a plurality of methane monitoring apparatus capable of synchronously monitoring methane content and a hydrodynamic environment, and a plastic-coated steel cable connected between the waterborne communication floating body and the gravity anchor; a data acquisition cabin is connected to the plastic-coated steel cable through a first communication module; and a first floating ball assembly is connected to the plastic-coated steel cable through a fixing rope. The submarine methane leakage intensity monitoring apparatus and the plurality of methane monitoring apparatus are disposed between the gravity anchor and the waterborne communication floating body at predetermined intervals.

Abstract: The present invention discloses a natural gas hydrate-bearing sediment intergranular micro-force testing device and a testing method thereof. The testing device comprises: a high pressure reactor, a natural gas cylinder, a natural gas buffer tank, a condensate circulation device, a water source and a gas-liquid saturated tank, wherein a gas inlet of the natural gas buffer tank communicates with the natural gas cylinder through a first pipeline, a gas outlet of the natural gas buffer tank communicates with a gas inlet of the high pressure reactor through a second pipeline, a water inlet of the high pressure reactor communicates with a water outlet of the gas-liquid saturated tank through a third pipeline, a water inlet of the gas-liquid saturated tank communicates with the water source through a fourth pipeline, the gas outlet of the natural gas buffer tank communicates with the fourth pipeline through a fifth pipeline.

Abstract: A natural gas hydrate pressure-retaining corer includes an outer tube assembly and an inner tube assembly installed inside the outer tube assembly. The inner tube assembly includes a first inner tube assembly and a second inner tube assembly. The first inner tube assembly includes a spearhead, a latching device, a suspension plug, a hydraulic piston tube, a piston short limit short section, a limit copper pin, a sealing head, a middle tube, a weight tube drive mechanism and a pressure-retaining ball valve closing sealing mechanism which are sequentially connected from top to bottom. The second inner tube assembly includes a piston compensation balance mechanism, a single-action mechanism, an accumulator mechanism, a sealing mechanism and a core barrel connected sequentially from top to bottom.

Abstract: The present invention discloses a natural gas hydrate-bearing sediment intergranular micro-force testing device and a testing method thereof. The testing device comprises: a high pressure reactor, a natural gas cylinder, a natural gas buffer tank, a condensate circulation device, a water source and a gas-liquid saturated tank, wherein a gas inlet of the natural gas buffer tank communicates with the natural gas cylinder through a first pipeline, a gas outlet of the natural gas buffer tank communicates with a gas inlet of the high pressure reactor through a second pipeline, a water inlet of the high pressure reactor communicates with a water outlet of the gas-liquid saturated tank through a third pipeline, a water inlet of the gas-liquid saturated tank communicates with the water source through a fourth pipeline, the gas outlet of the natural gas buffer tank communicates with the fourth pipeline through a fifth pipeline.

Abstract: The present invention relates to a natural gas hydrate pressure-retaining corer, which includes an outer tube assembly and an inner tube assembly installed inside the outer tube assembly. The inner tube assembly includes an inner tube assembly a and an inner tube assembly b. The inner tube assembly a includes a spearhead, a latching device, a suspension plug, a hydraulic piston tube, a piston short limit short section, a limit copper pin, a sealing head, a middle tube, a weight tube drive mechanism and a pressure-retaining ball valve closing sealing mechanism which are sequentially connected from top to bottom. The inner tube assembly b includes a piston compensation balance mechanism, a single-action mechanism, an accumulator mechanism, a sealing mechanism and a core barrel connected sequentially from top to bottom.