Near-seabed hydrate reservoir modeling method and device

Abstract

The invention discloses a near-seabed hydrate reservoir modeling method and device, and the method comprises the steps: building a geological model of a hydrate reservoir according to actually measured seismic data; constructing a geophysical model of the hydrate reservoir according to the actually measured seismic data and logging data; combining the geological model with the geophysical model toobtain a geological-geophysical model of the hydrate reservoir; acquiring a rock-soil mechanical parameter of the hydrate reservoir; and assigning the rock-soil mechanical parameter of the hydrate reservoir to the geological-geophysical model of the hydrate reservoir to obtain a three-dimensional model of the near-seabed hydrate reservoir. The invention provides a multi-parameter constrained high-precision near-seabed stratum model. Horizon and geologic structure information obtained through seismic inversion can be reflected, the rock-soil mechanical property and the safe and stable condition of the model can also be reflected, and a foundation is laid for subsequent exploitation of natural gas hydrates and risk assessment of seabed natural disasters.

Description

Technical field [0001] The invention relates to the field of oil and gas geophysical exploration, in particular to a method and device for modeling near-sea hydrate reservoirs. Background technique [0002] This section is intended to provide background or context for the embodiments of the invention stated in the claims. The description here is not recognized as prior art just because it is included in this section. [0003] Natural gas hydrate resources have huge potential. Compared with conventional oil and gas resources, natural gas hydrate produces less pollution and is one of the ideal alternative energy sources in the future. As the global natural gas hydrates are mainly distributed on the seafloor, the development of submarine reservoirs is an important way to obtain natural gas hydrate resources. [0004] However, affected by the complex deposition mechanism of deep-water gravity flow, the submarine reservoir has the characteristics of strong heterogeneity, which makes it ...

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Problems solved by technology

[0004] However, affected by the complex deposition mechanism of gravity flow in deep water, seabed reservoirs are characterized by strong heterogeneity, which makes it difficult for existing conventional reservoir modeling methods to be applied to seabed reservoir modeling

In addition, because most of the seabed hydrate reservoirs do not have complete trap structures and tight caprocks, problems such as engineering disasters (such as drilling safety) and geological disasters (such as submarine landslides) are prone to occur during the exploitation process. Therefore, how to It is of great significance to provide an accurate modeling method for seabed reservoirs for the exploitation of natural gas hydrate resources

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