Results 21 to 30 of about 3,985,421 (167)

Geochemical characteristics and origin of dolomite: A case study from the middle assemblage of Ordovician Majiagou Formation Member 5 of the west of Jingbian Gas Field, Ordos Basin, North China

Petroleum Exploration and Development, 2014
The trace elements, rare earth elements (REE), carbon and oxygen isotopic compositions and strontium isotopes were analyzed to study systematically the geochemical characteristics and origin of the middle assemblage dolomites from the Ordovician Majiagou
Xunyun HE, Jianfeng SHOU, Anjiang SHEN, Xingning WU, Yongsheng WANG, Yuanyuan HU, Yin ZHU, Dongxiao WEI   +7 more
doaj   +2 more sources

Controls on Development and Classification of Gypsum Mold-Vuggy Reservoirs: A Case Study from the Majiagou Formation, Jingbian Gas Field. [PDF]

ACS Omega
This study focuses on the gypsum mold pore-type reservoir of the Ma54 1 sublayer in the Majiagou Formation, northern Jingbian Gas Field. Based on core experiments and comprehensive geological analysis, it systematically reveals the reservoir development mechanism synergistically controlled by sedimentary microfacies and multistage diagenesis, and ...
He J, Luo Y, Li W, He C, Qiao L, Ma X, Liu Q, Li H, Fang S, Zhao Z, Jiang S, Wang M.   +11 more
europepmc   +3 more sources

Characteristics and genesis of fractures in Middle Ordovician Majiagou Formation, Daniudi Gas Field, Ordos Basin

Shiyou shiyan dizhi, 2022
The Daniudi Gas Field in the Ordos Basin has great natural gas potential, but a variety of fractures with complex origins was developed in the weathering crust karst reservoirs in the Middle Ordovician Majiagou Formation.
Xianfeng PENG, Hucheng DENG, Jianhua HE, Tao LEI, Yeyu ZHANG, Xiaofei HU   +5 more
doaj   +2 more sources

Restoration of formation processes of dolomite reservoirs based on laser U-Pb dating: A case study of Ordovician Majiagou Formation, Ordos Basin, NW China

Petroleum Exploration and Development, 2022
To address the issue of non-unique interpretation of dolomite reservoir diagenetic and porosity evolution in the previous qualitative or semi-quantitative studies, we investigate two dolomite reservoir types, i.e.
Jingao ZHOU, Zhou YU, Dongxu WU, Junfeng REN, Daofeng ZHANG, Shaoyi WANG, Chen YIN, Yuxin LIU   +7 more
doaj   +3 more sources

Reservoir characteristics and distribution of the Majiagou Formation in the Fuxian area of Ordos Basin, China

Energy Geoscience
The Majiagou Formation in the Fuxian area of the southeastern Ordos Basin has undergone a complex diagenetic evolution history under the influence of eustacy and the Caledonian karstification, resulting in several complex reservoir types.
Ning Gu, Juntao Zhang, Xiaohui Jin, Jiaqi Yang, Fei Yang, Lu Liu   +5 more
doaj   +2 more sources

New understandings on gas accumulation and major exploration breakthroughs in subsalt Ma 4 Member of Ordovician Majiagou Formation, Ordos Basin, NW China

Petroleum Exploration and Development, 2022
Geological conditions and main controlling factors of gas accumulation in subsalt Ma 4 Member of Ordovician Majiagou Formation are examined based on large amounts of drilling, logging and seismic data.
Haiqing HE, Xujie GUO, Zhenyu ZHAO, Shengli XI, Jufeng WANG, Wei SONG, Junfeng REN, Xingning WU, He BI   +8 more
doaj   +3 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

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

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