Reservoir oil gas range detection method and device

Abstract

The invention provides a reservoir oil gas range detection method and device. The method comprises the steps of obtaining pre-stack common receiving point gather seismic data; determining a sensitive angle superposition data volume according to the pre-stack common receiving point gather seismic data; according to the sensitive angle superposition data volume, determining a frequency dispersion attribute profile; and according to the sensitive angle superposition data volume and the frequency dispersion attribute profile, determining the sensitive range of a target area to oil gas. According to the invention, calculation is carried out based on the pre-stack common receiving point gather seismic data, and compared with full-angle stacked post-stack seismic data, the most sensitive angle information of the oil-gas-containing response of the reservoir is reserved and highlighted, so that the interference of irrelevant factors is eliminated, and the characteristics of the oil-gas-containing reservoir seismic response are highlighted; the method is high in calculation efficiency and practicability, can accurately reflect the real situation of the underground reservoir, does not depend on well data, and is suitable for the situation that no well is drilled in the early stage of exploration.

Description

technical field [0001] The invention relates to the technical field of petroleum geophysical exploration, in particular to a method and a device for detecting the range of oil and gas in a reservoir. Background technique [0002] With the deepening of seismic exploration and the development of geophysical prospecting technology, especially the increasing complexity and difficulty of exploration objects, oil and gas exploration has developed from the original search for structural oil and gas reservoirs to complex oil and gas reservoirs such as lithology and structural lithology. Oil and gas prediction technology is playing an increasingly important role in oil and gas exploration. [0003] Due to the certain viscosity of oil and gas fluids, the energy and frequency of seismic waves will change significantly when passing through different formations or oil-gas and non-oil-gas formations, which is specifically manifested as "low-frequency resonance, high-frequency attenuation"...

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Problems solved by technology

[0006] The embodiment of the present invention provides a method for detecting oil and gas ranges in reservoirs, which solves the problem that in the prior art, when detecting hydrocarbons, a lot of information related to reservoirs and angles in seismic reflections will be lost, and the technology that cannot accurately reflect the real situation of underground reservoirs problem, the method includes:

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