Pre-stack inversion thin layer oil/gas-bearing possibility identifying method

A pre-stack inversion, oil and gas technology, applied in the direction of seismic signal processing, etc., can solve the problems of inability to identify and quantitatively analyze thin reservoirs, measurement scale differences hinder joint, non-uniqueness, etc., to reduce sampling randomness, The effect of improving inversion resolution and clarifying physical meaning
CN102508293AInactive Publication Date: 2012-06-20CHINA UNIV OF PETROLEUM (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (BEIJING)
Publication Date
2012-06-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a pre-stack inversion thin layer oil / gas-bearing possibility identifying method. The pre-stack inversion thin layer oil / gas-bearing possibility identifying method comprises the following steps of: (1) constructing interpreting data and logging data by utilizing earthquake, and establishing an initial elastic parameter model based on a deposition mode; (2) obtaining an initial model and a model restrain range of random inversion through determination inversion based on a Baysian principle; (3) carrying out random sampling on three-parameter-related Monte Carlo simulationestablished by utilizing rock physical diagnosis and regression analysis so as to obtain a logging scale model; (4) calculating to obtain an elastic parameter model under an earthquake scale by utilizing a Hash in-Shtrikman boundary average method; (5) simulating forwards an angular domain pre-stack earthquake record and a actual earthquake record to calculate a cost function and calculate acceptance probability of the elastic parameter model, and determining a new logging scale elastic parameter model according to the acceptance probability; (6) iterating repeatedly the steps of (3), (4) and(5) and determining an optimal logging scale elastic parameter mode as a final result of earthquake three-parameter pre-stack inversion; and (7) carrying out thin layer oil / gas-bearing possibility identification of an oil reservoir by utilizing a three-parameter three-dimensional space intersection method.
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Description

technical field

[0001] The invention relates to oil and gas field seismic exploration and oil and gas reservoir prediction and description methods, in particular to a pre-stack inversion thin-layer oil-gas identification method. Background technique

[0002] Seismic inversion is an effective method to obtain internal images of subsurface media and describe reservoirs in detail, and it is also the ultimate form of high-resolution seismic exploration. Seismic data inversion greatly increases the value of reservoir characterization. With the increase of exploration degree of oil and gas reservoirs, it is very difficult to find large-scale structural oil and gas reservoirs in oil and gas areas with relatively high degree of exploration and development. The oil and gas reservoir exploration and development workers are more interested in deepening the understanding of the explored and developed oil and gas reservoirs, making a more detailed description and characterization of the...

Claims

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