Quantitative description method for torsional/tensional geological structure

Abstract

The invention provides a quantitative description method for a torsional / tensional geological structure. The quantitative description method for the torsional / tensional geological structure comprises the steps of a step 1, analyzing according to fault geometric features, forming an analog according to a tectonic stress field and a fault, determining the type of a basin torsional / tensional structure; a step 2, establishing a basin and fault forming mechanism and a static model; a step 3, performing dynamic quantitative analysis, obtaining the development characteristic of the basin torsional / tensional structure, performing quantitative calculation for obtaining the vertical displacement and horizontal displacement of a torsional / tensional fault in each key period, and meeting a quantization standard; and a step 4, establishing a dynamic geological structure for torsional / tensional fault of the basin, and defining control function for a basin sedimentary reservoir and oil-and-gas migration and entrapment. The quantitative description method for the torsional / tensional geological structure has functions of defining control function of the torsion / tension structure to deposition, reservoiring and entrapment, settling a problem of low well drilling success rate in torsional / tensional basins, and realizing profound measuring for oil-gas exploration on similar basins.

Description

technical field [0001] The invention relates to the technical field of oil field exploration and development, in particular to a quantitative description method of twisted geological structure. Background technique [0002] The dynamic and static quantitative analysis of the torsional geological structure is based on the torsional basin, which is highly segmented, with complex stratigraphic deposits, multi-provenance, and multi-sedimentary systems. In the Zhang Basin, such as the Huimin Sag, the exploration level is relatively low, and the drilling success rate in the twisted Basin is low. On the other hand, the research on the twisted basin is extremely limited at home and abroad. For this reason, we invented a new quantitative description method of torsional geological structure, which solved the above technical problems. Contents of the invention [0003] The purpose of the present invention is to provide a quantitative description method for the twisted geological st...

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Problems solved by technology

[0002] Dynamic and static quantitative analysis of torsional geological structure, based on torsional basins, with strong segmentation, complex stratigraphic deposits, multi-provenance, and multi-sedimentary systems; the understanding of oil-rich depressions is unclear, especially in the Jiyang depression, which is similar to torsional Exploration in Zhang Basin, such as Huimin Sag, etc., is at a relatively low level, and the success rate of drilling in twisted Basin is low

On the other hand, the research on this torsional basin is extremely limited at home and abroad.

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