Simulation method and system of preferential migration passage in heterogeneous transport layer

Abstract

The invention discloses a simulation method and system of a preferential migration passage in a heterogeneous transport layer, and relates to the technical field of petroleum geology exploration. The preferential passage which leads to a trap in the transport layer in a reservoir forming process can be quickly calculated, but not a path with a maximum difference value is easily selected, and the most possible path under the current data condition is preferably selected. Compared with the mode, the method and the system have the advantages that a fluid potential and rill mark simulation-based effect is closer to the realistic condition from the point of view of implementation; the prediction accuracy is high; meanwhile, since the algorithm is easier, the calculation is quick.

Description

technical field [0001] The invention relates to the technical field of petroleum geological exploration, in particular to a method and system for simulating a dominant channel inside a heterogeneous transport layer. Background technique [0002] As the degree of exploration in the favorable zones in the basin continues to increase, most of the dominant structures with large structural amplitudes that can be clearly identified on the seismic profile have been basically confirmed, and most of the dominant traps with favorable petroleum geological evaluation have been drilled. Relatively speaking, the identification and research of lithologic-stratigraphic traps and oil-gas reservoirs controlled by lateral changes in sedimentary system, reservoir lithology, and physical properties have gradually become the main goals of oil and gas exploration and development. [0003] Since the secondary migration of oil and gas presents a multiphase flow phenomenon in porous media, most of th...

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Problems solved by technology

[0005] However, this method of using the homogeneous seepage method to restore the oil and gas migration process in the heterogeneous medium has shortcomings in terms of mechanism, and cannot truly simulate the dominant channels of oil and gas.

Controlled by permeability heterogeneity, the migration path of oil and gas is difficult to predict effectively

Judging from the results observed in laboratories at home and abroad, this method of using the homogeneous seepage method to restore the migration process of oil and gas in heterogeneity is beneficial to the advantage of oil and gas in the heterogeneous transport layer along the low resistance. The channel migration and accumulation is not reflected enough, and the prediction accuracy is too low, so it is impossible to predict favorable traps in favorable zones relatively accurately

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