Multi-trap oil gas differential accumulation experimental simulation device and method

Abstract

The invention relates to a multi-trap oil gas differential accumulation experimental simulation device and method. The device comprises a simulation box body, a pressure control system connected with the oil gas inlet and the oil gas outlet of the simulation box body, and a data processing and analyzing system connected with the pressure control system, wherein the simulation box body comprises an upper simulation chamber and a lower simulation chamber; the upper simulation chamber comprises an upper simulation chamber baseplate and a plurality of traps arranged on the upper simulation chamber baseplate; a hole for communicating each trap with the lower simulation chamber is formed between the trap and the lower simulation chamber; each trap comprises a trap bottom surface and a trap part movably connected with the trap bottom surface; a lower simulation chamber top plate is movably connected with the top of the lower simulation chamber. A sand body transporting layer and the traps are combined to realize the comprehensive physical experiment of oil gas transportation and accumulation, physical simulation of underground oil gas charging process can be realized in real, and related simulation experiment results can provide references for the oil gas transportation and accumulation mechanism and provide oil gas transportation and accumulation parameters for oil gas exploration and development.

Description

technical field [0001] The present invention relates to an experimental simulation device and experimental method for oil and gas accumulation, in particular, to a physical simulation device and experimental method for multi-trap oil and gas accumulation under controllable experimental pressure. and charging pressure changes, so as to trace the oil and gas migration path and migration process when oil and gas pass through multiple traps underground. Background technique [0002] The accumulation of oil and gas underground occurs in traps, so the process of oil and gas accumulation in traps is the core content of the mechanism of oil and gas accumulation. The accumulation of traps that can be exploited on an industrial scale is the oil and gas reservoir, and the oil and gas reservoir is the target of oil and gas exploration and development. Therefore, the traps and the accumulation process of traps are also the content that the oil and gas industry pays special attention to. ...

AI Technical Summary

Problems solved by technology

[0012] (1) The existing physical simulations of the mechanism of oil and gas migration and accumulation are basically carried out around faults, unconformities and single sand bodies, or teaching models for the concept of single sand bodies, which have not been able to reflect the passage of oil and gas through different circles underground. Experimental simulation device for multi-trap oil and gas accumulation mechanism with different traps

[0013] (2) The existing physical simulation methods of oil and gas migration paths either do not consider the influence of charging pressure on the simulated path, or only consider the influence of inlet pressure on the simulation experiment. Since the actual underground oil and gas migration is dominated by the migration force, The formation pressure is one of the important migration forces, and the oil and gas migration process is affected by both the inlet pressure and the outlet pressure, that is, the confining pressure and pressure relief conditions in the actual geological process.

Therefore, the existing technology does not really solve the simulation experiment technology under voltage control

[0014] (3) The existing physical experiment models are all filled with sand bodies in a single box. These filled sand bodies are regarded as the carrier layers of oil and gas, and the carrier layers and traps are not combined, so they can only reflect the migration of oil and gas process, which cannot reflect the accumulation process of oil and gas charging in the trap

[0015] (4) In the existing physical simulation test system, the filled quartz sand layer is mostly designed horizontally, which cannot reflect the characteristics of the curved surface of the underground formation and the migration process of oil and gas under the inclined formation, especially the migration of oil and gas along the structural ridge. shifting features

[0016] (5) Some existing devices for simulating oil and gas migration mainly observe the phenomenon of oil and gas migration, and cannot collect and quantitatively analyze the oil and gas products after the experiment

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