A Method of Constructing Geosteering Stratum Model

Abstract

A method for constructing a geosteering stratum model, comprising: obtaining three-dimensional seismic data in a drilling area to be analyzed, generating a seismic section according to the three-dimensional seismic data; performing binary processing on the trace data of the seismic section to obtain a binary seismic section; Perform boundary processing on the data whose value is the first value in the binary seismic section to obtain the boundary of the first value, and change the first value within the boundary to the third value to form a data sequence library; set the value to The data points of the first value are connected according to the coordinate positions to form a vector stratigraphic line, and a geosteering stratum model of the drilling area to be analyzed is constructed according to the vector stratigraphic line. This method can greatly simplify the original formation data, so that only a small number of effective data are retained. In this way, the computer software can quickly complete relevant data processing and calculation in a shorter period of time, so as to provide relevant data for geosteering engineers, thus ensuring the real-time performance of geosteering applications.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a method for constructing a geosteering formation model. Background technique [0002] At present, geosteering technology has begun to be widely used in the field of drilling exploration and development technologies such as oil and natural gas, and in horizontal well operations. Before geosteering, stratigraphy should be modeled. Using seismic data to extract the sequence change characteristics of the formation, the exact position and thickness of each reflection interface of the reservoir is an important content of oil and gas geophysical exploration, and it is also the basis for the establishment of a geosteering stratigraphic model. [0003] The seismic signal can be regarded as the source wavelet filtered by the ground. It is a comprehensive reflection of the seismic wavelet, formation reflection coefficient and noise that change simultaneousl...

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Problems solved by technology

[0005] However, the formation data used in the geosteering method in the prior art is very large, which requires the use of complex databases. The import and processing of a formation database often takes more than several hours, which is not conducive to the real-time performance of geosteering applications.

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