The invention is related to a system which has been developed to obtain gas from the gas hydrate formations that are found under the frozen layers of earth in the cold regions or sea floor/slopes and comprises a drilling machine (3) that performs drilling by means of a drilling bit (33) after being lowered into the drilled well, drilling machine lowering and controlling equipment (1) which allow said drilling machine (3) to be lowered into the well and supply power and control to the system (A), and a stripped production tubing (4) with plugs (41) in which the water level and water level dependent pressure and gas pressure are controlled, which allows for the dissociation of the formation into gas and water and forming a cavern (6), and in which the gas separated from the gas hydrate formation reaches the surface; and to the method presented by using said system (A).

Disclosed herein are systems and methods for producing natural gas from gas hydrates, which in some embodiments can sequester carbon dioxide. In an embodiment, the system includes: an injection well; a producing well; a producer annulus; a well annulus; a y-shaped well couple; a gas wellbore; a heating wellbore; a well tubing; a tank; a water pump; a separator; a wellhead choke; a work pipe; a CO.sub.2 compressor; a well casing; and a pressure-regulator valve. In another embodiment, the method includes: obtaining hot water using a y-shaped horizontal well couple; injecting water heated by geothermal energy; transferring heat from a geothermal zone to a gas hydrate deposit zoon using a dual-lateral horizontal well; regulating water-flooding flow rate using a wellhead choke; collecting water and natural gas using a dual-lateral horizontal well; and coupling the two horizontal wells through connection of two laterals in the gas hydrate zone.

A method can include performing a reservoir simulation for injection of carbon dioxide into a reservoir via an injection well: during the performing, accessing a trained machine learning model that outputs hydrate information based on reservoir conditions; and, based on the hydrate information, generating reservoir simulation results that indicate an amount of the carbon dioxide sequestered in the reservoir.

The present techniques are directed to a system and method for generating power and recovering methane from methane hydrates. The system includes a low emissions power plant configured to generate power, wherein an exhaust gas from the low emissions power plant provides a gas mixture including nitrogen and carbon dioxide. The system also includes a methane recovery system configured to recover methane from methane hydrates by injecting the nitrogen and the carbon dioxide from the gas mixture into the methane hydrates.

A process for removing an obstruction (13) caused by gas hydrates or water ice from the tubing (12) of a hydrocarbon production or injection well or a riser using a microwave. The process comprises passing a microwave generating and emitting tool (5) on wireline (8) down the tubing (12) and supplying electrical power to the tool via the wireline (8) or from a battery to produce microwave energy and direct it to the gas hydrate and/or water ice deposit (13), thereby melting deposit and unblocking the well.

An apparatus and method may operate to position an electrode assembly within a fluid. The electrode assembly may include an injection electrode and a receiving electrode in spaced relation to one another. The method may include providing a series of excitation signals at a plurality of frequencies to the injection electrode to inject a series of injection signals into the fluid. The method can further include receiving signals in response to the series of injection signals through the receiving electrode. The received signals can be representative of an impedance spectrum including impedance values representative of the fluid. The method can further include generating a phase angle fingerprint based on the impedance spectrum to characterize the fluid according to the phase angle fingerprint. Additional apparatus, systems, and methods are disclosed.

Provided is a simulation method and system of joint exploitation of natural gas hydrate, shallow gas and deep-seated gas. The method includes: constructing a simulation model of joint exploitation of a shallow gas layer and a hydrate layer, including setting and meshing the shallow gas layer and the hydrate layer, constructing the simulation model of joint exploitation by setting a formation parameter and a production parameter, and solving the model to acquire productivity data; constructing a simulation model of joint exploitation of the shallow gas layer, the deep-seated gas layer and the hydrate layer, including setting and meshing the shallow gas layer, the deep-seated gas layer and the hydrate layer, constructing a simulation model of joint exploitation of the shallow gas layer, the deep-seated gas layer and the hydrate layer by setting the formation parameter and the production parameter, and solving the model to acquire productivity data.

A computational framework can include a network interface that receives data from multiple field sites; a processor-based predictor that utilizes at least a portion of the data to generate predictions for production and emissions at each of the multiple field sites; and a processor-based pathway generator that utilizes the predictions to generate an action pathway with different actions for implementation at one or more of the multiple field sites.

Naphthenic imidazoline can be used in inhibiting formation of natural gas hydrate. A composition contains the naphthenic imidazoline and modified polysaccharide. The modified polysaccharide may be cationic amylose.

A nitrogen-carbon dioxide mixed gas jet apparatus for a horizontal well and an exploitation method is presented. The jet apparatus includes: an offshore platform, a natural gas processing unit, and a pressurizing unit, wherein a portion of the gas exploitation pipe in the hydrate layer is provided with a gas injection horizontal well; a mixed gas jet unit and a nozzle assembly are disposed in the gas injection horizontal well; the mixed gas jet unit is configured to mix nitrogen and carbon dioxide, and then inject the mixed gas into a hydrate deposition layer through the nozzle assembly, so that the mixed gas replaces methane gas in the hydrate deposition layer; the portion of the gas exploitation pipe in the hydrate layer is provided with a gas exploitation horizontal well configured to collect the methane gas and convey the methane gas to the natural gas processing unit.