Interpretation method and system for hydrofracture micro-seismic event

Abstract

The invention provides an interpretation method and system for a hydrofracture micro-seismic event. The method comprises: collecting regional geological structure data of a target reservoir stratum; collecting seismic fissure data of the target reservoir stratum; collecting a hydrofracture micro-seismic event of the target reservoir stratum; extracting attribute data from the seismic fissure data; determining a reservoir stratum characteristic parameter according to the seismic fissure data; and on the basis of the regional geological structure data, the attribute data, and the reservoir stratum characteristic parameter, interpreting the hydrofracture micro-seismic event to obtain an interpretation result. Therefore, on the basis of combination of the attribute reflecting the natural fissure feature in the seismic data, the reservoir stratum characteristic parameter, and the micro-seismic event feature, the interpretation result of the micro-seismic event distribution feature becomes persuasive; the reservoir stratum modification result can be evaluated well; and the follow-up horizontal well pattern layout can be guided.

Description

technical field [0001] The present invention relates to the field of petroleum geophysical exploration, in particular to the interpretation technology of hydraulic fracturing microseismic events, specifically a method and system for interpreting hydraulic fracturing microseismic events. Background technique [0002] Microseismic fracturing monitoring technology is to locate artificial fractures by monitoring microseismic events, clarify the direction of fracture extension, fracture length, fracture width, and fracture height, and guide the subsequent exploration and development of oil and gas fields. The idea of ​​microseismic originally originated in mining, mainly to avoid corresponding geological disasters in mining. By the early 1980s, microseismic monitoring had been successfully applied many times in the geothermal industry, mainly for target confirmation of development wells and auxiliary fault description. Subsequently, in the verification of other countries in the ...

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Problems solved by technology

[0006] In order to overcome the relatively backward microseismic interpretation technology caused by the microseismic interpretation technology in the prior art only staying in the connection between the generation of microseismic events and regional faults, the present invention provides a hydraulic fracturing microseismic The event interpretation method and system combine seismic information with microseismic events, use attributes reflecting natural fracture characteristics in seismic data and combine reservoir characteristic parameters with microseismic event characteristics to make the interpretation results of microseismic event distribution characteristics More convincing, better evaluate the effect of reservoir stimulation, and guide the follow-up horizontal well pattern layout

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