Landmark Graphics Corporation

Landmark Graphics Corporation, a Halliburton Company

Qin Lu

Graham Christopher Fleming

James William Watts

Qinghua Wang

James William Iii Watts

Oil or gas fields and associated facilities are computer simulated by solving linear algebraic equations using a Schwarz method with at least one well node included in the overlap. According to another aspect, equations for the wellbore nodes are processed to eliminate some non-pressure variables, e.g. component compositions. Other features are also provided.

Oil or gas production using computer simulation of oil or gas fields and production facilities

Systems and methods for determining operating settings for a fluid production system that includes wells and a processing facility, the method including identifying at least one swing well and one or more non-swing wells and determining at least one target parameter equation that is a function of at least one processing facility constraint and one or more non-swing well parameters. The method further includes incorporating the target parameter equation into a fully-coupled equation set representing the production system, simulating the production system using the fully-coupled equation set to obtain one or more operating settings that meet the processing facility constraint, and presenting to a user the operating settings.

Systems and methods for optimizing facility limited production and injection in an integrated reservoir and gathering network

In some embodiments, systems, methods, and articles may operate to compute, in parallel, to determine values of unknowns in network equations associated with a network of sub-surface wells and at least one surface facility, for intra-well subdivisions of the network, and then for inter-well subdivisions of the network, wherein the computing is based on default values of the unknowns, or prior determined values of the unknowns. Additional activities may include constructing a distributed Jacobian matrix having portions comprising coefficients of the unknowns distributed among a number of processors, wherein each of the portions is distributed to a particular one of the processors previously assigned to corresponding ones of the subdivisions. The Jacobian matrix may be factored to provide factors and eliminate some of the unknowns. Back-solving is used to determine remaining unsolved ones of the unknowns, using the factors. Additional apparatus, systems, and methods are described.

Parallel network simulation apparatus, methods, and systems

Systems and methods for determining active constraints in a surface facility network, which include the use of slack variables and multipliers in system equations to eliminate the extraneous (inactive) constraints.

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Katy, TX, United States of America

Qin Lu