Methods are provided herein for an end-of-life recovery of mobilized hydrocarbons from a stranded hydrocarbon pay zone within a subterranean reservoir by way of a recovery well. In some embodiments, the stranded pay zone is located between mobilized hydrocarbon zones of thermal recovery operations. In some embodiments, the stranded pay zone is an upper stranded pay zone located above a mobilized hydrocarbon zone of a thermal recovery operation. In some embodiments, the stranded pay zone is a lower stranded pay zone located below a mobilized hydrocarbon zone of a thermal recovery operation. The methods herein involve commencing end-of-life recovery at an end-of-life stage after a production threshold is achieved for thermal recovery operations.

An atomization generator and a special high-pressure atomization generation device for increasing oil and gas field recovery are provided. The special high-pressure atomization generation device for increasing oil and gas field recovery includes an agent pot assembly, a gear pump, a metering pump, an atomization generator and pipelines. The gear pump is connected with the agent pot assembly through an agent pot liquid inlet pipe. The metering pump is arranged between the agent pot assembly and the atomization generator which are connected through the low-pressure manifold pipeline and the high-pressure liquid inlet pipeline. The high-pressure liquid inlet pipeline is connected with the liquid inlet pipe. The liquid inlet pipes are connected with the metering pump. The gas inlet pipe is connected with the high-pressure gas source through the high-pressure gas inlet pipe. The gas inlet cap is provided with a gas inlet pipe.

Provided are methods of recovering oil from a reservoir using carbon dioxide foam flooding in which a carbon dioxide foam of increased strength is used.

A treatment system comprises a treatment bladder associated with a volume of a tubing-casing annulus of a wellhead system to be treated. The treatment bladder contains a treatment fluid and is at an elevated pressure. The treatment bladder is coupled to the tubing-casing annulus utilizing a fluid conduit through a lower fluid junction. The fluid conduit permits two-way fluid communication between the treatment bladder and the tubing-casing annulus. A method for treating the tubing-casing annulus includes coupling the treatment bladder containing the treatment fluid of the treatment system to the tubing-casing annulus of the wellhead system using the fluid conduit, establishing two-way fluid communication between the tubing-casing annulus and the treatment bladder though the fluid conduit, halting fluid communication though the fluid conduit, and decoupling the treatment bladder from the tubing-casing annulus.

A system and method for enhanced oil transport and storage are provided. Comprehensive energy recovery and generation systems are provided which supply a heated gas by product, such as carbon dioxide, which to heat oil stored in a storage tank or oil transported in a pipeline, which reduces the viscosity of the oil, thereby increasing the efficiency of the pipeline and the ability to store and transport the oil without sludge accumulations.

A method of enhanced oil recovery may comprise placing into a subterranean formation a production enhancement fluid comprising a short chain hydrocarbon phase and a silane based wettability modifier, wherein the short chain hydrocarbon phase comprises hydrocarbons having 5 or less carbon atoms; allowing the production enhancement fluid to remain in the subterranean formation for a shut-in period; and producing hydrocarbons from the subterranean formation.

The invention provides a method and an apparatus for determining an integrated exploitation approach for a shale and adjacent oil reservoirs. The method includes: determining a thickness of an effective shale, a top effective boundary and a bottom effective boundary of adjacent effective oil reservoirs; determining a maximum seepage radius of each of the adjacent effective oil reservoirs to the effective shale; determining a well pattern; determining a well completion approach; and determining a total number of perforation clusters of gas injection wells, a number of perforation clusters corresponding to each of the adjacent effective oil reservoirs, a gas injection amount per unit time of each of the perforation clusters, and a total gas injection amount per unit time of the gas injection wells. The effective shale is in communication with all the adjacent effective oil reservoirs by boring-through of a fluctuating horizontal well or a vertical well.

A method includes selecting a model for a simulation of hydrocarbon recovery from a reservoir having a plurality of fractures during injection of an injected gas into the plurality of fractures. Selecting the model includes determining a flux ratio of a convection rate to a diffusion rate for the reservoir, determining whether the flux ratio is less than a threshold, and in response to the flux ratio being less than the threshold, selecting the model that includes diffusion. Selecting the model includes performing the simulation of the hydrocarbon recovery from the reservoir based on the model.

Systems, methods, and computer program products can be used for determining the amount of oil removed by a miscible gas flood. One of the methods includes identifying locations of oil within a volume representing a reservoir rock sample. The method includes identifying locations of gas within the volume. The method also includes determining the amount of oil removed based on locations within the volume where oil is either coincident with the gas or is connected to the gas by a continuous oil path.

Embodiments are provided herein for in situ upgrading of a heavy hydrocarbon in a reservoir having an injection well and a production well, or a well that is alternately operated as an injection well and a production well. Embodiments are also provided herein for selecting a degradable solvent for use in a process for in situ upgrading of a heavy hydrocarbon in a reservoir having an injection well and a production well, or a well that is alternately operated as an injection well and a production well.