Results 21 to 30 of about 231 (148)

Tightness and sweet spot formation in moldic-pore-type dolomite reservoirs: The middle Ordovician Majiagou Formation in the eastern Ordos Basin, central China

Petroleum, 2019
The diagenetic evolution of the moldic-pore-containing gypsum dolomites of the Middle Ordovician Majiagou Formation in the eastern Ordos Basin, central China, was studied by means of petrological, mineralogical, and geochemical analyses, to improve our ...
Tong Niu, Kai Hu, Di Xiao, Xing Gao, Juanping Chen, Jian Cao   +5 more
doaj   +2 more sources

A Novel Method to Predict S-Wave Velocity of Carbonate Based on Variable Matrix and Equivalent Porous Medium Model

Geofluids
Taking the carbonate of the Majiagou Formation in the Ordos Basin as an example, this paper introduces a method for predicting the S-wave velocity of carbonate based on rock physics modeling.
Xiangzhong Chen, Jinsheng Dong, Bin Wang, Wei Li, Junhao Ma   +4 more
doaj   +2 more sources

Tectono-sedimentary evolution and oil-gas geological significance of first to third member of Ordovician Majiagou Formation in Ordos Basin, NW China

Petroleum Exploration and Development
Based on logging, core, thin section and geochemical analysis, the tectonic-lithofacies paleogeographic pattern of first member to third member of Ordovician Majiagou Formation (O1m1–O1m3 for short) in Ordos Basin is reconstructed, and the tectono ...
Shoukang ZHONG, Xiucheng TAN, Liubin WEI, Jie XU, Qianping WANG, Ying XIONG, Chunying WU, Jiansheng DU   +7 more
doaj   +3 more sources

Genesis of dolomite in the upper assemblage of the Ordovician Majiagou Formation in the southeastern Sulige gas field, Ordos Basin, China: Evidence from C, O, and Sr isotopes and major and trace elements

Energy Exploration & Exploitation, 2020
Typical dolomite reservoirs exist in the upper assemblage of the Ordovician Majiagou Formation in the southeastern Sulige gas field, Ordos Basin, however, the current understanding of dolomite genesis needs to be clarified.
Liwen Zhu, Zhenliang Wang, Qianghan Feng, Bo Zhang, Li Wei, Zhuyu Yu   +5 more
doaj   +2 more sources

Characteristics and indication of hydrocarbon-generating organisms in sub-salt Majiagou Formation of well T112, central and eastern Ordos Basin

Shiyou shiyan dizhi
In recent years, breakthroughs in natural gas exploration have been continuously achieved in the Ordovician Majiagou Formation of the central and eastern Ordos Basin, with geochemical characteristics of self-generation and self-storage.
Yinuo ZHANG, Dongdong ZHANG, Liubin WEI, Wenhui LIU, Pingping SHI, Xiaofeng WANG, Qian ZHANG, Yining LI, Zhicheng JIN   +8 more
doaj   +2 more sources

Dolomites in a carbonate-evaporite system: the fifth member of the Middle Ordovician Majiagou Formation, Eastern Ordos Basin, China

Frontiers in Marine Science
IntroductionThe carbonate-evaporite system contains substantial hydrocarbon resources and serves as an excellent subject for studying dolomitization problem.
Siyi Fu, Siyi Fu, Siyi Fu, Siyi Fu, Chenggong Zhang, Chenggong Zhang, Chenggong Zhang, Hao Liu, Hao Liu, Hao Liu, Liubin Wei, Hongping Bao, Xingchao Ye, Zhongtang Su, Zhongtang Su, Zhongtang Su, Hongde Chen, Hongde Chen, Hongde Chen, Liangbiao Lin, Liangbiao Lin, Liangbiao Lin   +21 more
doaj   +2 more sources

New Discovery and Significance of Microbialites of the Middle Ordovician Majiagou Formation in Liujiang Basin, Hebei, China [PDF]

Earth Sciences, 2021
The concept, classification, genesis, and significance of microbialites have been constantly improving for over a century, but they are still hot spots in the field of geology because of the strong attractions and many unsolved mysteries such as the mechanism of the microbial deposition process, the microbial induced sedimentary structures, and so on ...
Qingchun Wang, Ping He, Fangle Shen, Jiangmin Du   +3 more
openaire   +1 more source

Prediagnosis recognition of acute ischemic stroke by artificial intelligence from facial images. [PDF]

Aging Cell
Prediagnosis model by artificial intelligence and facial images accurately evaluates acute ischemic stroke risk by recognizing abnormal face patterns and associating them with physiological markers and aging. Abstract Stroke is a major threat to life and health in modern society, especially in the aging population.
Wang Y, Ye Y, Shi S, Mao K, Zheng H, Chen X, Chen X, Yan H, Lu Y, Zhou Y, Ye W, Ye J, Han JJ.   +12 more
europepmc   +2 more sources

Controlling Factors of Meteoric Diagenesis in Karst Reservoirs: An Example from the Majiagou Formation, Ordos Basin, China

Minerals, 2023
Karst reservoirs have always been a key field of oil and gas exploration. However, quantifying the process of meteoric transformation remains a persistent challenge that limits the accuracy of reservoir quality prediction. To explore the controlling factors of meteoric cementation on karst reservoirs, the Majiagou Formation of the Ordos Basin in China ...
Jiaqi Yang, Juntao Zhang, Zhiliang He, Marco Brandano, Chongyang Wu   +4 more
openaire   +1 more source

Experimental Characteristics of Hydrocarbon Generation from Scandinavian Alum Shale Carbonate Nodules: Implications for Hydrocarbon Generation from Majiagou Formation Marine Carbonates in China’s Ordos Basin

Journal of Marine Science and Engineering, 2023
The hydrocarbon source rocks of the marine carbonates of the Ordovician Majiagou Formation in the Ordos Basin are generally in the high-overmature stage and are, therefore, not suitable for hydrocarbon thermal simulation experiments.
Yiqing Wang, Yaohui Xu, Junping Huang, Jianglong Shi, Heng Zhao, Qingtao Wang, Qiang Meng   +6 more
doaj   +1 more source