A Thin Reservoir Description and Determination Method of Reserve Increase Scale Based on Subdivided Layers

Abstract

The invention discloses a thin reservoir description and reserves increase scale determination method based on a subdivision of layer series, and belongs to the technical field of oil exploration anddevelopment. The thin reservoir description and reserves increase scale determination method based on the subdivision layered system comprises the following steps of: performing and combining geological thin reservoir delineation with seismic reservoir prediction on a fault-lithology, lithology trap development area by the subdivision of layer series, wherein, a single sand body boundary is delineated by preferably using a seismic attribute volume slice matched with the thin reservoir deposition features; combing the distribution area of the high-quality thin reservoir and the position of thelithology sealing strip layer by layer, and realizing the fine description of the thin reservoir distribution features; effectively analyzing the ensured thin reservoir subdivision of layer series todetermine the physical property lower limit of the effective reservoir, removing the dry and poor layer and encircling the space distribution area of the effective reservoir; performing oilness analysis of the trap on the effective reservoir distribution area to obtain a single-layer reserves increase scale, and determining the reserves increase scale of the target potential area according to thelayer series superposition mode. The thin reservoir description and reserves increase scale determination method based on the subdivision layered system realizes the overall evaluation of the block resource potential.

Description

technical field [0001] The invention relates to a method for describing thin reservoirs based on subdivided layers and determining the scale of increasing reserves, and belongs to the technical field of petroleum exploration and development. Background technique [0002] With the improvement of the degree of exploration, the remaining oil and gas resources to be discovered are becoming more and more hidden, and the exploration and development objects are becoming more and more complex. The lithology and fault-lithology reservoirs with thin reservoirs as the main controlling factors are the old oil areas at this stage. The main areas for increasing reserves and production, but how to reflect the oil and gas resource enrichment area and reserve increasing potential of this type of reservoir, whether it can form a scale, how to define the distribution area of ​​high-quality reservoirs and the specific location of lithological sealing zone, are the current issues. focus of the r...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for describing thin reservoirs based on subdivided layers and determining the scale of reserve increase, so as to solve the problems of difficult identification of hidden traps, unclear description of reservoirs, and reserve increase potential in the exploration process of old oil areas. and technical problems such as difficulty in discovering large-scale reserves

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