Fluid flow and related diagenetic processes in a rift basin: Evidence from the fourth member of the Eocene Shahejie Formation interval, Dongying depression, Bohai Bay Basin, China

AAPG Bulletin ◽  
2016 ◽  
Vol 100 (11) ◽  
pp. 1633-1662 ◽  
Author(s):  
Benben Ma ◽  
Kenneth A. Eriksson ◽  
Yingchang Cao ◽  
Yancong Jia ◽  
Yanzhou Wang ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Bohai Bay ◽  
Rift Basin ◽  
Bohai Bay Basin ◽  
Diagenetic Processes ◽  
Dongying Depression ◽  
Shahejie Formation ◽  
Fourth Member

Depositional model for lacustrine nearshore subaqueous fans in a rift basin: The Eocene Shahejie Formation, Dongying Sag, Bohai Bay Basin, China

Sedimentology ◽  
2018 ◽  
Vol 65 (6) ◽  
pp. 2117-2148 ◽  
Author(s):  
Yingchang Cao ◽  
Yanzhong Wang ◽  
Jonathan Gordon Gluyas ◽  
Huimin Liu ◽  
Haining Liu ◽  
...  
Keyword(s):  
Bohai Bay ◽  
Depositional Model ◽  
Rift Basin ◽  
Bohai Bay Basin ◽  
Dongying Sag ◽  
Shahejie Formation

scholarly journals A near-shore clastic-carbonate mixing mode in a continental rift basin (early Oligocene, eastern Shijiutuo Uplift, Bohai Bay Basin, China): sedimentology, reservoir characteristics and exploration practice

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Xiao-Feng Du ◽  
Hao Liu ◽  
Xiao-Bo Huang ◽  
Zhang-Qiang Song ◽  
Wei Xu ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Steep Slope ◽  
Bohai Bay ◽  
Rift Basin ◽  
Bohai Bay Basin ◽  
High Quality ◽  
Early Oligocene ◽  
Near Shore ◽  
Shahejie Formation ◽  
High Quality Reservoir

Abstract A comprehensive sedimentary and reservoir analysis was conducted based on seismic, well logging, core and relative test data, taking Members 1 and 2 of Shahejie Formation of the early Oligocene in the steep slope belt, eastern Shijiutuo Uplift (STU), Bohai Bay Basin (BBB) as a case. The study indicates that a near-shore mixed fan deposit formed in the study area and developed characteristics and pattern of a high-quality reservoir. The mixed clastic-carbonate rocks constitute Members 1 and 2 of Shahejie Formation which developed along the steep slope belt and is named as a near-shore mixed fan. The mixed fan of the study area is mainly composed of microfacies of proximal channel, mixed deposited channel, mixed clastic beach, mixed bioclastic (grain) beach, with vertical multi-stage superimposition feature, and basically a similar shape as modern near-shore fans. It constitutes a new depositional type developing in the steep slope belt of a characteristic and complex lacustrine rift basin in the study area. This mixed fan in the steep slope of eastern STU is controlled by comprehensive factors including tectonics, clastic material supply, climate, palaeogeomorphology and hydrodynamic conditions. The reservoir quality of Members 1 and 2 of Shahejie Formation of eastern STU is, however, actually controlled by the sedimentary environment and diagenesis processes. Coarse-grained mixed rocks of near-shore fans, rich in bioclastics, can form excellent reservoirs, characterized by resistance to compaction, easy to dissolution, little influenced by burial depth and high production of oil and gas, which enable them become key exploration targets of medium-deep strata of BBB. Analyses of high-quality reservoir, its controlling factors and the oil and gas exploration implications of the near-shore mixed fan developing in the study area give a deeper insight into discussions of the same type of mixed rocks of other lacustrine rift basins worldwide.

scholarly journals Structural Interpretation of the Qingdong Area in Bohai Bay Basin from Shipborne Gravity Data

2015 ◽  
Vol 22 (s1) ◽  
pp. 100-105
Author(s):  
Chunguan Zhang ◽  
Jingguo Chen ◽  
Mingyi Song ◽  
Jinkuan Wang ◽  
Bingqiang Yuan
Keyword(s):  
Gravity Data ◽  
Fault System ◽  
Bohai Bay ◽  
Rift Basin ◽  
Bohai Bay Basin ◽  
Local Structures ◽  
The North ◽  
Dongying Depression ◽  
Geological Implications ◽  
Tectonic Features

Abstract The Qingdong area, located in Bohai bay basin, was suspected good exploration prospects. In order to study tectonic features and find out favourable petroleum prospects in the area, the gravity data at a scale of 1:50,000 were interpreted. This paper, through data processing and synthetic interpretation of the high-precision gravity data in the area, discusses characteristics of the gravity field and their geological implications, determines the fault system, analyses features of the main strata, divides structure units and predicts favourable petroleum zones. The results showed that the faults controlled the development of the Mesozoic and Cenozoic strata and the distribution of local structures in this area. The study revealed that the Qingtuozi uplift and the Kendong uplift in the north were formed in Mesozoic, and the Qingdong depression in the middle was the rift basin in Mesozoic and Cenozoic. Thicker strata in Mesozoic and Cenozoic developed in the Dongying depression and the Qingdong depression, so there is abundant hydrocarbon in these two depressions, and then the Guangligang rise-in-sag and the Qingdong rise-in-sag developed in the center in these two depressions are also favorable places for prospecting

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