A method for judging the main provenance direction of foreset body by foreset angle rose diagram

Abstract

The invention relates to a method for judging the main provenance direction of a progradation body by using a progradation angle rose diagram. The method includes following steps that: 1) with the boundaries of the progradation body identified, seismic data are utilized to determine the center point of the progradation body, and follow-up profile observation and angle measurement are carried out with the center point of the progradation body adopted as a rotation original point; 2) layer flattening processing is performed on a seismic reflection layer; 3) the due north reference profile of the progradation body is determined, the progradation angle of the true north reference profile is measured; 4) n profiles parallel to the due north reference profile are selected, so that a progradation angle in due north can be calculated; 5) the reference profile is rotated, so that progradation angles in other directions can be obtained; 6) the measured progradation angles are utilized to make the progradation angle rose diagram; and 7) the main provenance direction of the progradation body is judged according to the progradation angle rose diagram. With the method of the invention adopted, the main provenance direction of the progradation body can be explained directly and effectively. The method has guiding significance for the division of stages of complex bodies of sedimentary bodies of a tectonic region and research of reservoir characteristics and sedimentary phases, and has high operability.

Description

technical field [0001] The invention relates to the field of discriminating the main provenance direction of a sedimentary body in petroleum geophysics, in particular to a method for judging the main provenance direction of a foreset body through a foreset angle rose diagram, which can be widely used in seismic exploration. Background technique [0002] The rose diagram in geological research is a diagram with a wide range of uses. It is widely used because of its simple method and eye-catching image. Chen Anguo et al. (2011) published the document "Geometric Characteristics and Structural Significance of Joints in Pleistocene Clays in Hefei Area" and drew the trend rose diagram of each survey point in Pleistocene clays in Hefei area. The analysis shows that the distribution of joints is dominant The azimuth is approximately consistent with the strike of the main faults near the site; Han Yeming et al. (2011) analyzed the geological exploration results of the Hongshi copper ...

AI Technical Summary

Problems solved by technology

At present, in the process of identifying the source direction by relying on the seismic front product reflection characteristics, more rely on the observation of a large number of seismic sections for qualitative identification, and there is no intuitive and operable method and process

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