Article
Energy & Fuels
Qiaochu Wang, Dongxia Chen, Xianzhi Gao, Fuwei Wang, Sha Li, Ziye Tian, Wenzhi Lei, Siyuan Chang, Yi Zou
Summary: This study utilized multiple analytical methods to investigate the evolution of abnormal pressure in the Huimin Depression, revealing different evolutionary processes in the Central Deep-Sag Zone and the Northern Tectonic Uplift Belt. The study found that the paleo-pressure in the Central Deep-Sag Zone experienced two rising and two falling stages, transitioning from normal pressure to overpressure, while the paleo-pressure in the Northern Tectonic Uplift Belt experienced one rising and two falling stages, currently characterized by underpressure.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Ze Tao, Zhiliang He, Tiago M. Alves, Xiaowen Guo, Jian Gao, Sheng He, Wen Zhao
Summary: This study investigated the structural evolution in the Lijin and Boxing sags in the Dongying depression and found that inherited structures significantly control the development of overpressure in sedimentary basins.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Yanqi Hua, Xiaowen Guo, Ze Tao, Sheng He, Tian Dong, Yuanjia Han, Rui Yang
Summary: The Bonan sag in the Bohai Bay Basin of China is a prolific oil-producing Cenozoic basin with three identified overpressure systems caused by mechanisms such as disequilibrium compaction and oil generation. Different sealing rocks, such as mudstones and gypsum-rich layers, play important roles in maintaining the overpressure in different intervals. The variation in oil generation capacity of source rocks and sealing conditions controls the overpressure mechanisms in the Bonan sag.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Energy & Fuels
Yang Li, Jinliang Zhang, Yaohui Xu, Tao Chen, Xue Yan, Long Sun, Weichao Tian
Summary: Based on observations and analyses of the glutenite reservoirs in the Shahejie Formation in the Chezhen Sag, factors such as petrophysical structure, depositional facies, diagenesis, and formation overpressure were found to control the quality of the reservoirs. Different dissolution models in the different structural zones also affect the physical properties of the reservoirs. A grading assessment scheme based on these factors was proposed, and favorable exploration zones were identified.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Zhi Huang, Haifeng Yang, Tao Ye, Hui Deng, Jingzhen Guo, Shuyi Liang, Shuguang Xiao, Cunfei Ma
Summary: Carbonate buried hill reservoirs in the offshore Bohai Bay Basin, China have recently made breakthroughs in exploration. However, the distribution of these reservoirs is unclear due to their highly heterogeneous nature. This study focuses on the CFD2 oilfield and uses various data sources to clarify the characteristics of the reservoirs, discuss their formation mechanism, and establish a development model. The results indicate that the reservoirs are predominantly fractured-dissolved reservoirs, formed through structural fractures and fluid dissolution. Structural fractures controlled by tectonic activities play a crucial role in reservoir development, with dolomite being the dominant lithology for effective fractures. The dissolution of atmospheric water in two stages along the fractures greatly enhances the reservoirs' physical properties, ensuring their development.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Energy & Fuels
Honglin Huang, Jun Li, Hongwei Yang, Geng Zhang, Reyu Gao, Jintao An, Ming Luo, Wentuo Li
Summary: This study investigates the influence of diapir structures on the formation and distribution of overpressure in the Yinggehai Basin in the South China Sea. The results show that the diapir structures have a significant impact on the formation of overpressure. The study provides guidance for identifying and accurately predicting the overpressure formation mechanism in basins containing diapirs, as well as formulating efficient drilling and production plans.
ENERGY SCIENCE & ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Yinbing Zhu, Shaofeng Liu, Bo Zhang, Michael Gurnis, Pengfei Ma
Summary: The formation of the Bohai Bay Basin went through three main stages, with spatially heterogeneous deformation and clockwise rotation of velocity directions during the basin formation process. The reconstruction supports the interpretation that the basin formation was driven by strike-slip faulting and orthogonal extension, influenced by the direction of Pacific Plate subduction.
Article
Energy & Fuels
Xiaocheng Wang, Junqian Li, Yehai Huang, Shuangfang Lu, Ketong Chen, Yongbo Wei, Zhaojing Song, Rixin Zhao, Taohua He
Summary: The control effect of paleosedimentary environment characteristics on lacustrine shale oil enrichment is revealed, and a shale oil enrichment model is established through a comprehensive study of sedimentary facies characteristics and element migration.
Article
Geosciences, Multidisciplinary
Zhaosheng Wang, Meiri Muhtar, Donghao Xu, Jinchuan Fang, Jing Li, Daojie Liu, Zhenguo Zhang, Lianfeng Gao
Summary: Natural fractures in the Paleogene sandstone reservoirs at Nanpu Sag play a crucial role in the seepage system, with high-angle shear fractures being widely developed in the area. These fractures exhibit stress-sensitivity permeability and are divided into three phases, impacting the dynamic behavior of fractured reservoirs at different development stages.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Xiaofan Deng, Hongqiang Li, Rui Gao
Summary: In this paper, the applicability of the pre-stack depth migration method is tested using a deep seismic reflection dataset collected from the Bohai Bay Basin. By improving the signal-to-noise ratio of the prestack gathers and building an accurate velocity model, a high-quality pre-stack depth migration profile is obtained. This profile provides a higher-resolution subsurface image with accurate depth information, revealing geological structures and crust-mantle interaction in the study area.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Shujun Han, Bingsong Yu, Zhuang Ruan, Chenyang Bai, Zhenhuan Shen, Stefan C. Lohr
Summary: This research compared the sedimentary rock characteristics in different regions of the Bonan Sag, revealing significant differences in carbonate mineral composition, fluid inclusion temperature, and carbon-oxygen isotope values among different zones.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Jingshuang Luo, Yonghe Sun, Yougong Wang, Zhaohan Xie, Lingdong Meng
Summary: The eastern Liaodong Bay sub-basin has undergone phases of extension, strike-slip, and inversion-type deformation. The formation of fault patterns and anticlines in this area is mainly influenced by the movement of the Tan-Lu strike-slip fault zone.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Energy & Fuels
Yingchang Cao, Peipei Sun, Lihong Zhou, Guanghui Yuan, Huimin Liu, Da Lou, Zhiping Wu, Qiang Jin, Youlu Jiang
Summary: Based on various analytical methods, this study systematically investigated the structural and burial evolution histories, diagenetic evolution process, and genetic/development models of Upper Paleozoic Permian clastic rock reservoirs in the Bohai Bay Basin, East China. The findings provide important insights for subsequent exploration activities.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2023)
Article
Energy & Fuels
Ru Jia, Caiwei Fan, Bo Liu, Xiaofei Fu, Yejun Jin
Summary: Using the FAST method, the study analyzed the hydraulic fracture risk of main mudstones in the Yinggehai Basin, finding that the diapir zone is more prone to hydraulic fracturing, which is the fundamental reason for the difference in gas enrichment between the diapir zone and the slope zone.
Article
Geosciences, Multidisciplinary
Xiuyan Liu, Honghan Chen, Xuewei Xiao, Hongan Zhang, Yuwei Wang, Tianwu Xu, Pei Shang, Lingtao Kong
Summary: This paper investigates the overpressure evolution and formation mechanism in the Dongpu depression, identifying four pressure evolution stages and highlighting the significant role of salt rock distribution in pressure preservation.
JOURNAL OF EARTH SCIENCE
(2022)