Quantitative recovery method for carbonate rock stratum sedimentary micro-landform based on high-frequency cycle

Abstract

The invention discloses a quantitative recovery method for a carbonate rock stratum sedimentary micro-landform based on a high-frequency cycle, and relates to the technical field of ancient landform recovery. According to the method, sequence stratigraphy is taken as a theoretical basis, basic data information is fully applied, a spectrum analysis technology and a multi-scale matching method are adopted, an earthquake-logging sequence stratigraphic framework is established, sequence stratigraphic interface types and development characteristics are analyzed, isochronous geologic bodies are determined, and high-frequency cycle combination types and characteristics are acquired. Therefore, quantitative recovery of the carbonate rock stratum sedimentary micro-landform is achieved, the scale and precision of the sedimentary landform can be improved, powerful support is provided for deepening geological understanding and the next exploration direction, and then exploration risks and cost input are reduced.

Description

Quantitative restoration method of carbonate strata sedimentary micro-topography based on high frequency cycles technical field The present invention relates to petroleum exploration and development technical field, be specifically related to a kind of deep carbonate based on high frequency cycle Quantitative restoration methods for lithostratigraphic sedimentary microtopography. Background technique With the continuous maturity of oil and gas exploration theory, more and more examples confirm that the depositional environment is deep carbonate rock. The prerequisite for the development of the reservoir, and the sedimentary facies provides the material basis for the formation of the reservoir, and the two jointly control the development of the reservoir and spatial distribution. Based on previous studies, it is believed that the sedimentary environment and sedimentary facies are closely related to the sedimentary micro-topography. Therefore, the restoration of sedim...

AI Technical Summary

Problems solved by technology

Nowadays, for the restoration of sedimentary geomorphic units with large geomorphic elevation differences, stripping back method (Dai Jinyou et al., 2005), sedimentological analysis method (Zhao Junxing et al., 2001; Wu Liyan et al., 2005), sequence stratigraphy method ( Fan Tailiang et al., 1999; Wang Jiahao et al., 2003) etc. can realize it, but for regional strata with small relief of sub-level landforms, or even only meter-level differences, it is still difficult to describe such micro-landforms finely by using traditional restoration methods. unit

In addition, in the past, seismic data or logging data were mostly used for landform restoration, and the results obtained were not convincing due to the lack of constraints and verification.