A subsea hydrocarbon production field includes a number of first subsea Christmas trees, a first manifold and a number of first flexible flowline jumpers, each of which is connected between the first manifold and a corresponding first tree. In one embodiment, Each first flowline jumper includes a first flow conduit and a number of first umbilical lines.

A subsea hydrocarbon production field includes a number of first subsea Christmas trees, a first manifold and a number of first flexible flowline jumpers, each of which is connected between the first manifold and a corresponding first tree. In one embodiment, Each first flowline jumper includes a first flow conduit and a number of first umbilical lines.

Techniques for allocating hydrocarbon production include receiving a selection of a particular area identification (ID) of a plurality of area IDs stored on the server; determining based on the selected particular area ID, a plurality of hydrocarbon production values that include periodic area-level hydrocarbon production values associated with the particular area ID and a plurality of wells associated with the particular area ID; determining a decline curve model for the area-level hydrocarbon production values associated with the particular area ID; modeling the aggregated periodic well-level hydrocarbon production values with the determined decline curve model; and determining allocated well-level hydrocarbon production values based at least in part on the selected decline curve model to display at a client device.

Techniques for allocating hydrocarbon production include receiving a selection of a particular area identification (ID) of a plurality of area IDs stored on the server; determining based on the selected particular area ID, a plurality of hydrocarbon production values that include periodic area-level hydrocarbon production values associated with the particular area ID and a plurality of wells associated with the particular area ID; determining a decline curve model for the area-level hydrocarbon production values associated with the particular area ID; modeling the aggregated periodic well-level hydrocarbon production values with the determined decline curve model; and determining allocated well-level hydrocarbon production values based at least in part on the selected decline curve model to display at a client device.

Computing systems, computer-readable media, and methods for seismic processing. The method includes receiving seismic data including acquired seismic waveforms that were acquired from a seismic receiver and represent a subterranean area, generating synthetic waveforms based on an initial model of the subterranean area, determining a model error by minimizing a local travel time shift error between one or more of the acquired seismic waveforms and one or more of the synthetic waveforms, and adjusting the initial model based on the model error to generate an adjusted model.

Computing systems, computer-readable media, and methods for seismic processing. The method includes receiving seismic data including acquired seismic waveforms that were acquired from a seismic receiver and represent a subterranean area, generating synthetic waveforms based on an initial model of the subterranean area, determining a model error by minimizing a local travel time shift error between one or more of the acquired seismic waveforms and one or more of the synthetic waveforms, and adjusting the initial model based on the model error to generate an adjusted model.

A technique facilitates controlling fluid flows with a modular manifold. The modular manifold has a manifold base which is positioned at a desired surface or subsea location. Various types of modular units may be deployed to and/or retrieved from the manifold base according to the desired control of fluid flows with respect to a well or a plurality of wells. Each modular unit may be selectively coupled or decoupled along the manifold base to adjust the configuration of the manifold for a given job or over time to accommodate changing conditions.

A technique facilitates controlling fluid flows with a modular manifold. The modular manifold has a manifold base which is positioned at a desired surface or subsea location. Various types of modular units may be deployed to and/or retrieved from the manifold base according to the desired control of fluid flows with respect to a well or a plurality of wells. Each modular unit may be selectively coupled or decoupled along the manifold base to adjust the configuration of the manifold for a given job or over time to accommodate changing conditions.

A modular subsea fluid storage unit comprises a variable-volume inner tank having a rigid top panel and a peripheral wall that is flexible by virtue of concertina formations. The peripheral wall is extensible and retractable vertically while the horizontal width of the tank remains substantially unchanged. A side wall of a lower housing part surrounds and is spaced horizontally from the peripheral wall of the inner tank to define a floodable gap between the peripheral wall and the side wall that surrounds the tank. An upper housing part extends over and is vertically spaced from the top panel of the inner tank and overlaps the side wall to enclose the inner tank. The floodable gap and the upper housing part enhance thermal insulation and trap any fluids that may leak from the inner tank.

An offshore assembly to operate a facility, in particular an underwater oil and gas production facility. The offshore assembly has: a semi-submersible support structure arranged in a body of water and having at least one tubular portion; a wind turbine to generate electricity and equipped with a tower, a nacelle and a blade assembly. The offshore assembly also has at least one back-up power source mounted on the semi-submersible support structure to generate electricity. A plurality of compartments are stacked on top of each other within the tubular portion. Each of the compartments is dedicated to housing respective equipment to perform respective functions, and a cooling and ventilation system cools and ventilates the plurality of compartments.