There are obvious differences between two analytical methods named classic sequence stratigraphy and Cross' high-resolution sequence stratigraphy on identification method, applicability, inner structure and the knowledge of formation distribution of the sequence in the terrestrial rift basin.
Combined with the data on seismic, log, core and material analysis, and using the methods of sequence-stratigraphy and paleontology, the sequence-stratigraphic framework of the middle oil-bearing beds of the Songliao Basin is reconstructed, and the response of the Cypridea evolution to the sequence-stratigraphic framework is clarified.
It is considered, by using the basic principle of high-resolution sequence-stratigraphy and structural analysis and through combining the prograding process of Dongying delta with uppe-bend action of salt-shale structure, that significant thickness of delta prograding body is trigger factor of forming the salt-shale structure.
The stratum frame of Yanchang formation in Yan'an area is founded with the sequence-stratigraphy, Chang 6 is anatomised in detail. Sediment system is analyzed, mode of lithology and logging curve responding, sedimentary microfacies and evolvement is established.
The difference between seismic analysis of reservoir evolution and lithological seismic exploration is further discussed in the paper and difference and link with sequence-stratigraphy are also discussed.
On the basis of the sequences stratigraphy at the southeastern margin of Yangtze platform and the correlation with the similar strata on the other continents, the SMST of the third order type Ⅱsequence containing the Ordovician - Silurian Boundary, e.g., the so-called Guanyinqiao Bed and other synchro-depositions with typical features derived from the "shallow marine condensation process", has been distinguished around the world.
By exploring lithologic traps in MQZ area,it is concluded in this paper the 3 ways to explore lithologic traps. High resolution seismic data are the base of lithologic trap exploration,sequences stratigraphy is the theory, and seismic prediction technology is the method.
The 3-D pattern on sequential stratigraphy proposed by Vail et. al (1988, 1989) can be considered as a basis on which their new idea of sequential stratigraphy is established. It is the same pattern relying on which they make stratigraphic and lithologic interpretations.
After a summary of three development phases in metamorphism study, it is pointed out that in site study should be insisted in areas of importance for a long time and in depth, especially in Precambrian granulite areas and orogens, In sedimentology, there are three aspects which have important development: sequential stratigraphy, basin analysis and sedimental geological fluid.
An application of micropaleontology-sequence stratigraphy method in stratigraphic division
A method of micropaleontology-sequence stratigraphy is proposed herein.
The study considers Well Zhangcan 1 as an example to prove that the scheme of stratigraphic division is feasible by conducting micropaleontology-sequence stratigraphy in the Guanjiapu area of the Chengbei faultstep zone.
The application of micropaleontology-sequence stratigraphy method indicates that Member 1 of the Shahejie Formation in Well Zhuanghai 808×1 and Member 3 of the Dongying Formation of the Paleogene exist.
Therefore, the analyses of sequence stratigraphy are the key for predicting the presence of carbonate reservoirs.
The basis of the regional geologic framework includes outcrop sections (78), detailed core descriptions (165), and a net of subsurface wire-line log sections (14), all framed within modern concepts of regional correlation and sequence-stratigraphy.
Sequence-stratigraphy logging of the hole suggests that each S band is a sequence boundary.