Physical simulation system of oil gas migration preferred direction of unconformity structure body and experimental method thereof

Abstract

The invention relates to a physical simulation system of the oil gas migration preferred direction of an unconformity structure body and an experimental method thereof. The physical simulation system comprises a simulation subsystem and an injection subsystem which are connected through a connection subsystem, wherein the simulation subsystem comprises a base and a simulator; the simulator is arranged on the base; a gap is formed between the simulator and the base; the base is connected with the connection subsystem; the simulator is a transparent container with the longitudinal section in a U shape; and the cross section of the simulator comprises a plate-shaped part, a groove-shaped part and a ridge-shaped part. The physical simulation system disclosed by the invention is mainly used for revealing the oil gas migration preferred direction of the unconformity structure body and directing the exploration of stratigraphic oil gas deposits by revealing the deposit control action mechanism of the unconformity structure body by changing experiment conditions according to different geological backgrounds, adopts a 360-degree totally transparent design on appearance, three-dimensionally observes the migration state of oil gas deposits in the unconformity structure body in real time and researches the influence factors of the migration of oil gases along the unconformity structure body by changing a tilt angle, a quartz sand grain size, oil injection pressure, and the like.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration, and in particular relates to a physical simulation system for the dominant direction of crude oil migration along unconformity structures. Background technique [0002] Unconformity structures are not only the recorders of tectonic movements or sea (lake) level changes, but also represent the different degrees of reformation of earlier sedimentary rocks (objects) by later geological processes (Liu Bo et al., 1997). The uniformity and the overlying rocks formed by the transgression of the later sea (lake) level rise gave the unconformity a spatial hierarchy (Wu Kongyou et al., 2002, 2003; Sui Fenggui et al., 2006). Therefore, unconformity is not only a "surface", but also a "body", which itself has a unique micro-structure, that is, a "spatial structure" attribute (Wu Kongyou et al., 2012). The unconformity structure refers to the geological body formed near the discontinuity,...

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Problems solved by technology

[0006] However, the preferred direction of oil and gas migration along unconformity structures has not yet been simulated in the laboratory, and relevant technologies and equipment have not yet been formed.

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