Study on Fault Activity in Linnan Area of Huimin Depression, Bohai Bay Basin

2012 ◽  
Vol 616-618 ◽  
pp. 133-136
Author(s):  
Hao Wei Zhou ◽  
Zai Xing Jiang ◽  
Jin Dong ◽  
Zhi Ping Wu ◽  
Wei Li

Based on the analysis of growth index, fault throw and fault activity rate, we find the method of fault activity rate integrates advantages of other methods which avoids the influence of erosion and could carry out comparison among fault activities of different geological times. We optimize the method of fault activity rate to analyze the characteristics of fault activities in Linnan area and the results show: the main direction of the faults in Linnan area is nearly NEE-trending and most of the faults have two larger activity periods. It acts intensively in the period of Es2 and Ed and weakens in the period of Es1 and Ng. There is a small comeback in the period of Nm at last. We conduct the force analysis of this area based on stress ellipsoid and find that the stress state agrees well with the regional geological background. The evolution of faults is impacted by the subduction of the Pacific plate and the compression of the Indian Ocean plate.

2019 ◽  
Vol 37 (4) ◽  
pp. 1253-1267
Author(s):  
Kai Zhao ◽  
Youlu Jiang ◽  
Jonathan Imber ◽  
Hongjin Hu ◽  
Hua Liu ◽  
...  

2017 ◽  
Vol 54 (3) ◽  
pp. 311-321
Author(s):  
Lixin Pei ◽  
Wenzhe Gang ◽  
Daming Wang ◽  
Min Xiong

A geochemical investigation was carried out on 32 crude oil samples to investigate the origin of the oil and to trace the migration direction in the Linyi fault area, Huimin Depression, Bohai Bay Basin, China. The oils, which were characterized by low gammacerane content and a dominance of C27 over C29 regular steranes, originated from the source rock of the third member of the Shahejie Formation (Es3) in the Linnan Sag. A sequential charge of low- and high-maturity oils from the Es3 source rocks resulted in a decrease in oil maturity in the migration direction. The petroleum migration direction in the footwall of the Linyi fault was northward, away from the fault, and the migration direction at the southwest end (in the hanging wall) of the Linyi fault was westward, along the fault, as evidenced by lateral gradients of biomarker parameters of various maturity, density, and viscosity.


2019 ◽  
Vol 55 (6) ◽  
pp. 4079-4096
Author(s):  
Qiaochu Wang ◽  
Dongxia Chen ◽  
Fuwei Wang ◽  
Jinheng Li ◽  
Wenhao Liao ◽  
...  

2018 ◽  
Vol 36 (6) ◽  
pp. 1519-1545 ◽  
Author(s):  
Siding Jin ◽  
Haiyang Cao ◽  
Hua Wang ◽  
Shanbin Chen

The Bohai Bay Basin is the second largest oil-producing basin in China located on the east Asian margin. The Bohai Bay Basin contains numerous depressions, sub-basins, and sags. One of these, the Nanpu Sag, has played a particularly important role in oil and gas exploration in recent years. Four depositional systems are recognized in the Nanpu Sag, fan-delta, braided-river delta, turbidite deposits, and lacustrine systems. In the Paleogene, the Nanpu Sag underwent complex and multi-phased rifting evolution. Two evolutionary phases have been identified: the syn-rift phase and the post-rift phase, the syn-rift stage can be further sub-divided into four episodes. This study reveals the considerable faulting activity and associated strong subsidence that occurred during the deposition of the Dongying Formation in the fourth episode of the syn-rift stage. The depositional systems and the tectonic activity during the fourth episode in the Nanpu Sag have very different characteristics compared to those of other depressions or sub-basins in the Bohai Bay Basin. Boundary fault activity was extremely intense during the deposition of the Dongying Formation, especially the east to west trending faults, including the Xinanzhuang Fault and the Gaoliu Fault. Moreover, the migration of subsidence centers from the Shahejie Formation to the Dongying Formation is a result of the strong down-warping that occurred during the fourth episode of the syn-rift stage. In the Nanpu Sag, the Dongying Formation is of great significance to hydrocarbon exploration, which is affected by both the intensity of fault activity and magnitude of basement subsidence.


Minerals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 517
Author(s):  
Zehua Zhang ◽  
Hongliang Wang

Clarification of the source of the Eocene sediments filling the Huimin depression provides significant support for current and future oil and gas exploration in the Bohai Bay Basin, China. A comprehensive assessment of sediment provenance based on sandstone petrography, heavy mineral assemblages, seismic reflection data, and distribution of sandstone bodies of the Shahejie Formation (Es2) to the Dongying Formation (Ed) productive interval based on both its macroscopic and microscopic provenance aspects. This method of analysis has the advantages of easy data acquisition, high accuracy, strong flexibility, wide application range, and making the analysis of sedimentary provenances more systematic. Comprehensive analysis of the Huimin depression, Bohai Bay Basin has revealed further that the origin of the Eocene second member of the Shahejie Formation (Es2) to the Dongying Formation (Ed) provenance system was derived from the Linfanjia high, the Chengning uplift, and the Luxi uplift.


2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Liang Luo ◽  
Jiafu Qi ◽  
Hongxiang Li ◽  
Yueqi Dong ◽  
Shuai Zhang ◽  
...  

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