Sediment transport simulation with parameterized templates for depth profiling

A sediment and depth technology, applied in complex mathematical operations, geographic modeling, geophysical measurement, etc., can solve problems such as prediction errors of corresponding changes in time and space

Active Publication Date: 2017-04-26
CHEVROU USA INC
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Problems solved by technology

In existing depth-averaged flow simulations of reservoirs and / or basins, the loss of flow and vertical variability of sediment concentrations, and their corresponding changes in time and space, are expected to cause significant errors

Method used

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  • Sediment transport simulation with parameterized templates for depth profiling
  • Sediment transport simulation with parameterized templates for depth profiling
  • Sediment transport simulation with parameterized templates for depth profiling

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Embodiment Construction

[0021] The complex structure of sedimentary bodies that characterizes key heterogeneities in oil and gas reservoirs is directly related to the migration, erosion, deposition and sorting of sediment particles of different sizes in the sedimentary system. For example, the deposition of clastic sedimentary bodies that form deltas or basin-floor fans is usually all in the form of sandy water flowing from narrow channels (such as estuaries or submarine canyon mouths) into open areas (such as the open water bodies of shallow river systems or seafloor environments). Abyssal plains or deep water basins) begin. The point where the sedimentary flow enters the open area where deposition occurs is often referred to as a channel or canyon mouth, or simply as the inlet of the corresponding sedimentation basin. Initially, this flow is free to expand and deposits deposits as the flow decelerates. Thereafter, the deposited sediment begins to impede the flow field as it grows taller. Eventual...

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Abstract

Depth-averaged flow simulation systems and methods provided herein employ parameterized templates for dynamical depth profiling for at least one step of a simulation. In one illustrative computer-based embodiment, the simulation method includes, for each map point at one given time step: determining a flow template and a sediment concentration template based on depth-averaged flow velocity and depth-averaged sediment concentrations of different classes of grain size for that map point; employing the templates to construct a vertically-distributed flow velocity profile and vertically-distributed sediment concentration profiles for associated classes of grain size for that map point, thereby obtaining 3D flow velocity and 3D sediment concentration fields; using the 3D fields to calculate fluid and sediment fluxes; updating the flow velocity and sediment concentration profiles based on the divergence of the fluxes; integrating the profiles to compute updated depth-averaged flow velocity and sediment concentrations and center of gravity; and solving the depth-averaged flow equations for the next time step.

Description

Background technique [0001] Many of today's oil and gas reservoirs were formed by fluid flow deposits in paleo-basins. Fluid flow transports sediment, sorts and selectively deposits particles of different sizes to form sediment bodies with predictable geometries and properties. If such processes could be realistically simulated with sufficient accuracy, realistic modeling of subsurface reservoirs would become possible. The oil and gas industry expects geological models as input for reservoir performance simulations, which are used to select new well locations, estimate oil and gas reserves, and plan reservoir development strategies. The geological model specifies key parameters (such as the spatial distribution of fluid properties and permeability) for characterizing reservoir behavior and determining reservoir productivity. (For a sandstone reservoir, the spatial distribution of permeability is a function of the particle size distribution of the sands that make up the reser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V99/00
CPCG01V99/005G06F30/20G06F17/10
Inventor 孙韬M·沙利文M·J·派兹M·珀尔马特J·科沃尔特
Owner CHEVROU USA INC
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