scholarly journals HISTORICAL CHANGES AND SEDIMENTARY ENVIRONMENT OF IMAZU TIDAL FLAT

2008 ◽  
Vol 52 ◽  
pp. 1087-1092
Author(s):  
Yukihiro SHIMATANI ◽  
Sho YOKOGAWA ◽  
Takuma SOU ◽  
Yoichi KAWAGUCHI ◽  
Shigeru MIZUGAKI ◽  
...  
Keyword(s):  
Tidal Flat ◽  
Sedimentary Environment ◽  
Historical Changes

scholarly journals The Early Silurian Sedimentary Environment of Middle-Upper Yangtze: Lithological and Palaeontological Evidence and Impact on Shale Gas Reservoir

Minerals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 494 ◽  
Author(s):  
Qu ◽  
Zhu ◽  
Wang ◽  
Shang
Keyword(s):  
Shallow Water ◽  
Deep Water ◽  
Tidal Flat ◽  
Sedimentary Environment ◽  
Gas Diffusion ◽  
Organic Carbon Content ◽  
High Porosity ◽  
Gas Reservoir ◽  
Longmaxi Shale ◽  
Tight Gas Reservoir

The organic-enriched thick shale at the bottom of Longmaxi Formation is laterally continuous distributed and has been proven to be of good production capability in Fuling of Upper Yangtze. Uplifts that developed during the sedimentation influenced the reservoir characteristics by taking control of the sedimentary environment and provenance. The sedimentary environments are mainly deep-water shelf, shallow-water shelf, and tidal flat. By analyzing reservoir characteristic of these three environments, the deep-water shelf, which dominated the early stage of sedimentation, formed a high-quality reservoir with high TOC (Total Organic Carbon) content, porosity, and brittleness, while the environment was maintained around the basin centre until the Early Silurian. The shales deposited under the shallow-water environment were of low porosity because of the increasing calcareous and argillaceous contents. Sediments which formed on the tidal flat were arenaceous and of the lowest TOC content as the organic preservation conditions deteriorated. The good correlation of graptolite abundance and TOC content, and high porosity within graptolite fossils emphasize the importance of palaeontological development. The argillaceous cap over the Longmaxi shale is of good sealing capability, and the continuous sedimentation zone along southern Sichuan–eastern Chongqing is the best optimized hydrocarbon-bearing system. However, a weak interface on the discontinuity is the potential lateral pathway for gas diffusion at Northern Guizhou and Western Hunan, but on the southeast margin where the dark shale and the tidal sandstone contact, it promises to form a tight gas reservoir.

scholarly journals Evaluation of the sedimentary environment of the block 102 of Song Hong basin by petrophysics

2015 ◽  
Vol 18 (4) ◽  
pp. 84-101
Author(s):  
Thanh Thi Ngoc Nguyen ◽  
Luan Thi Bui
Keyword(s):  
Spatial Distribution ◽  
Shallow Water ◽  
Marine Environment ◽  
Coastal Plain ◽  
Tidal Flat ◽  
Middle Miocene ◽  
Sedimentary Environment ◽  
Late Oligocene ◽  
Delta Plain

Interpretation of wireline logging data supported to recover the sedimentary environment of block 102 of Song Hong basin. It inchided in determination of the spatial distribution of source, reservoir and cap rocks and an indispensable part in oil exploration of this area. Resulted wireline logging data showed some sedimentary environment units as the following The late Oligocene was delta environment. It was identified as forming delta plain, swamp to lacustrine. The middle Miocene had changed to shallow water marine environment, which formed the shoreface, tidal flat, lagoon and channel. The lower Miocene was aluvial environment that changed into fluvial and coastal plain.

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