Guidelines for seismic sedimentologic study in non-marine postrift basins

Zeng, Hongliu; Zhu, Xiaomin; Zhu, Rixiang; Zhang, Qingshi

doi:10.1016/s1876-3804(12)60045-7

Cited by 62 publications

(6 citation statements)

References 9 publications

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“…Different from classic seismic stratigraphy, seismic sedimentology is a discipline that uses the relationship between seismic amplitude (attribute) with lithology and the relationship between spatial reflection mode with sediment morphology to study sedimentary lithology, physical properties, geomorphology, sedimentary structure, and sedimentary environment. − Seismic geobody interpretation and stratal slicing are important techniques for studying seismic sedimentology. Stratal slicing can map seismic attributes of geological time surfaces .…”

Section: Resultsmentioning

confidence: 99%

Analysis of the Genetic Model of the Extremely Narrow Channel Shallow Water Delta in DL-A Oilfield, Bohai Bay Basin

Fan,

Kong,

et al. 2023

ACS Omega

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Section: Resultsmentioning

confidence: 99%

Analysis of the Genetic Model of the Extremely Narrow Channel Shallow Water Delta in DL-A Oilfield, Bohai Bay Basin

Fan,

Kong,

et al. 2023

ACS Omega

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“…The seismic model observations, however, show that the seismic events do not simply reflect the isochronous interface nor the lithologic interface but are controlled by the frequency of the seismic data [22,27]. Using the wavelet transform method, the original seismic data were decomposed into a series of data volumes with different dominant frequencies, and, subsequently, the stable events K 8 , M 3 and K 7 that do not change with the frequency were finally determined through frequency-division calibration.…”

Section: Seismic-geological Isochronous Stratigraphic Frameworkmentioning

confidence: 99%

“…Therefore, the conventional stratal slice technology cannot meet the lithology and sedimentary facies characterization requirements of this sequence. Similar to the studied coal basin, the lithological distribution of the coal-bearing basins in China is much more complex, and, in many cases, sandstones, mudstones, limestones and coal seams coexist, and the wave impedance would be multipolar [2,18,22], especially in areas where thin layers are commonly developed.…”

Section: Seismic Lithology Characteristicsmentioning

confidence: 99%

“…Seismic sedimentology is based on the disciplines of geophysics, seismic stratigraphy and sequence stratigraphy, and the technical means mainly include 90 • phase rotation, stratal slice and frequency division calibration [20,21]. Seismic sedimentology studies the stratigraphic lithology, sedimentary genesis, basin filling history and sedimentary system through the integrated analysis of seismic lithology and seismic geomorphology [18,22]. It has played an important role in delineating thin sand bodies, predicting favorable reservoirs and comprehensively evaluating potential blocks in the hydrocarbon-bearing sedimentary basin [20,[23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Seismic-Geological Integrated Study on Sedimentary Evolution and Peat Accumulation Regularity of the Shanxi Formation in Xinjing Mining Area, Qinshui Basin

et al. 2022

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Accurate identification of the lithofacies and sedimentary facies of coal-bearing series is significant in the study of peat accumulation, coal thickness variation and coal-measured unconventional gas. This research integrated core, logging and 3D seismic data to conduct a comprehensive seismic–geological study on the sedimentary evolution characteristics and peat accumulation regularity of the Shanxi Formation in the Xinjing mining area of the Qinshui Basin. Firstly, the high-resolution sequence interface was identified, and the isochronous stratigraphic framework of the coal-bearing series was constructed. Then, the temporal and spatial evolution of sedimentary filling and sedimentary facies was dynamically analyzed using waveform clustering, phase rotation, stratal slice and frequency–division amplitude fusion methods. The results show that the Shanxi Formation in the study area can be divided into one third-order sequence and two fourth-order sequences. It developed a river-dominated deltaic system, mainly with delta plain deposits, and underwent a constructive–abandoned–constructive development stage. The locally distributed No. 6 coal seam was formed in a backswamp environment with distribution constrained by the distributary channels. The delta was abandoned at the later stage of the SS1 sequence, and the peat accumulation rate was balanced with the growth rate of the accommodation, forming a large-area distributed No. 3 thick coal seam. During the formation of the SS2 sequence, the No. 3 coal seam was locally thinned by epigenetic erosion of the river, and the thin coal belt caused by erosion is controlled by the location of the distributary channels and their extension direction. This study can provide a reference for the research on the distribution of thin sand bodies, sedimentary evolution and peat accumulation regularity in the coal-bearing series under the marine–continental transitional environment.

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“…However, compared to marine basins, continental basins in China are quite different in their major control factors and petrophysical and seismic reflection features (Gu et al 2005;Zeng et al 2012) (Table 1), resulting in difficulties in seismic sedimentology interpretation due to the following characteristics: (1) complex depositional systems, various sedimentation types, and rapid changes in sedimentary facies within a small range; due to the filtering effect of wavelets, sands of different sedimentary types are similar in their geophysical responses, which is not only shown in seismic reflection but also on seismic slices, so a seismic sedimentology methodology for sands of different sedimentary types is still lacking; (2) thin and poor lateral continuity of sand bodies; seismic sedimentology investigates the sedimentary features and evolutionary pattern of deposition, but due to the effects of different deposition velocities in different parts of the basin, seismic slices for thin sands are prone to diachroneity; and (3) complex lithology-wave impedance relations; in contrast to marine basins, continental basins in China are much more complex in their lithological distribution (in many cases, conglomerate, sandstone, mudstone, limestone, and coal coexist) and multi-polar in wave impedance, making it difficult to calibrate the lithology on the 90°phase seismic profile and resulting in multiple possible interpretations of the lithology based on seismic data. In view of these constraints, new thinking and more detailed and effective technical means are needed to generate lithological data cubes and conduct seismic geomorphological analyses for continental basins.…”

Section: Sedimentary Features Of Strata In Continental Basinsmentioning

confidence: 99%

Methods for seismic sedimentology research on continental basins

Wei

2015

Pet. Sci.

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In contrast to marine deposits, continental deposits in China are characterized by diverse sedimentary types, rapid changes in sedimentary facies, complex lithology, and thin, small sand bodies. In seismic sedimentology studies on continental lacustrine basins, new thinking and more detailed and effective technical means are needed to generate lithological data cubes and conduct seismic geomorphologic analyses. Based on a series of tests and studies, this paper presents the concepts of time-equivalent seismic attributes and seismic sedimentary bodies and a ''four-step approach'' for the seismic sedimentologic study of continental basins:Step 1, build a time-equivalent stratigraphic framework based on vertical analysis and horizontal correlation of lithofacies, electrofacies, seismic facies, and paleontological combinations;Step 2, further build a sedimentary facies model based on the analysis of singlewell facies with outcrop, coring, and lab test data; Step 3, convert the seismic data into a lithological data cube reflecting different lithologies by means of seismic techniques; and Step 4, perform a time-equivalent attribute analysis and convert the planar attribute into a sedimentary facies map under the guidance of the sedimentary facies model. The whole process, highlighting the verification and calibration of geological data, is an iteration and feedback procedure of geoseismic data. The key technologies include the following: (1) a seismic data-lithology conversion technique applicable to complex lithology, which can convert the seismic reflection from interface types to rock layers; and (2) time-equivalent seismic unit analysis and a timeequivalent seismic attribute extraction technique. Finally, this paper demonstrates the validity of the approach with an example from the Qikou Sag in the Bohai Bay Basin and subsequent drilling results.

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Guidelines for seismic sedimentologic study in non-marine postrift basins

Cited by 62 publications

References 9 publications

Analysis of the Genetic Model of the Extremely Narrow Channel Shallow Water Delta in DL-A Oilfield, Bohai Bay Basin

Analysis of the Genetic Model of the Extremely Narrow Channel Shallow Water Delta in DL-A Oilfield, Bohai Bay Basin

Seismic-Geological Integrated Study on Sedimentary Evolution and Peat Accumulation Regularity of the Shanxi Formation in Xinjing Mining Area, Qinshui Basin

Methods for seismic sedimentology research on continental basins

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