Results 31 to 40 of about 477 (209)

Reservoir space characterization of vuggy carbonate reservoirs with multiple scales: a case study of Ma 5-7 interval, Middle Ordovician Majiagou Formation, Daniudi area, Ordos Basin

Shiyou shiyan dizhi, 2021
The reservoir space of carbonate rocks is of multiple scales and genesis mechanisms, and it is difficult to accurately demonstrate the reservoir space as well as physical properties.Millimeter-, micro- and nano-scale reservoir spaces were all developed ...
Xiaoqi DING, Xin LIU, Zhuangzhuang QI, Wei ZHANG, Sihong LIU   +4 more
doaj   +1 more source

Dolomitization of the Ordovician subsalt Majiagou Formation in the central Ordos Basin, China: fluid origins and dolomites evolution [PDF]

Petroleum Science, 2020
AbstractThe Middle Ordovician subsalt Majiagou Formation in the Ordos Basin comprises pervasively dolomitized shallow marine limestone and is a major reservoir rich in natural gas resources. Four types of dolomite matrix and cement were identified based on petrographic textures: (very) finely crystalline, non-planar to planar-s matrix dolomite (Md1 ...
Ying Xiong, Li-Chao Wang, Xiu-Cheng Tan, Yun Liu, Ming-Jie Liu, Zhan-Feng Qiao   +5 more
openaire   +1 more source

[Retracted] Influence of Gestational Hypertension on Cardiovascular Health Behaviors and Factors

Computational Intelligence and Neuroscience, Volume 2022, Issue 1, 2022., 2022
Objective. A survey was conducted to analyze the epidemiological differences in ideal cardiovascular health (CVH) behaviors and factors after delivery in females with and without gestational hypertension (GH) and evaluate the influence of GH on cardiovascular health behaviors and factors. Methods. The present study adopted a cross‐sectional design.
Haiyan Zhao, Yuntao Wu, Junyan Sun, Changhao Zu, Chunyu Ruan, Kai Cui, Honghong He, Shouling Wu, Xiaojing Peng, Rahim Khan   +9 more
wiley   +1 more source

Floor Disturbance and Failure Characteristics of Super‐Large Mining Height Working Face

Geofluids, Volume 2022, Issue 1, 2022., 2022
The failure depth of the working face floor caused by mining is a key parameter to predict water inrush from the working face floor. Extensive research has been conducted on the floor failure zone of the working face. However, in recent years, there have been few studies on the floor failure law of the working face with a super‐large mining height ...
Cunjin Lu, Jinpeng Xu, Hui Zhao, Heng Zhang, Yian Zhang, Mingyue Chen, Wensong Wang   +6 more
wiley   +1 more source

Probabilistic Evaluation of Hydraulic Fracture Performance Using Ensemble Machine Learning

Geofluids, Volume 2022, Issue 1, 2022., 2022
Evaluation of hydraulic fracture (HF) performances is critical to develop unconventional resources such as tight oil and gas. We present a probabilistic evaluation approach that integrates ensemble machine learning with Monte Carlo simulation. In the method, we employ the ensemble learning to develop a predictive model between well productivity and its
Xiaoping Xu, Xianlin Ma, Jie Zhan, Yating Wang   +3 more
wiley   +1 more source

Pore Structures of the Lower Permian Taiyuan Shale and Limestone in the Ordos Basin and the Significance to Unconventional Natural Gas Generation and Storage

Geofluids, Volume 2022, Issue 1, 2022., 2022
In the Ordos Basin, multiple sets of coal seams, organic‐rich shale, and limestone are well developed in the Permian Taiyuan Formation, which are favorable targets for collaborative exploration of various types of unconventional natural gas resources, including coalbed methane, shale gas, and tight gas.
L. Zhang, Q. Zhao, C. Wu, Z. Qiu, Q. Zhang, Y. Wang, D. Liu, D. Dong, S. Zhou, Jing Wu   +9 more
wiley   +1 more source

Geochemical Characteristics of Formation Water in Carbonate Reservoirs and Its Indication to Hydrocarbon Accumulation

Geofluids, Volume 2022, Issue 1, 2022., 2022
The migration path of formation water plays an indispensable role in hydrocarbon accumulation and preservation. The hydrodynamic field controls the content of various ions in formation water and is an important participant in hydrocarbon evolution. Formation water can basically be used to judge the preservation status of oil/gas reservoirs, especially ...
Zhen Sun, Zhen Yang, Xiaoning He, Cixuan Wan, Gang He, Qiang Ren, Shihu Zhao, Wei Cheng, Sisi Chen, Zhehui Jin   +9 more
wiley   +1 more source

Constraints on Diagenetic Fluid Source and Genesis in Tight Dolostone Reservoir of Submember Ma55 of Ordovician Majiagou Formation in Northwestern Ordos Basin, China: Evidence from Petrology and Geochemistry

Geofluids, Volume 2022, Issue 1, 2022., 2022
Diagenetic fluids is one of the most important reservoir modifiers, their differences can result in various petrography, storage capacity, and geochemical characteristics, so clarifying the diagenetic fluids is vital for understanding dolostone origin.
Baiqiang Li, Zhenzhen Wu, Taofa Zhou, Bin Chen, Qicong Wang, Xiaoli Zhang, Fan Yang   +6 more
wiley   +1 more source

Evolution of prototype basin and change of tectonic-sedimentary pattern in Paleozoic, Ordos Basin

Shiyou shiyan dizhi, 2022
The Ordos Basin is a craton basin developed based on the Precambrian rift system during Permian. It has experienced two stages of evolution including the Early Paleozoic craton marginal depression and Late Paleozoic intra-craton depression.
Faqi HE, Fubin WANG, Liguo GUO, Chuan AN
doaj   +1 more source

Ordovician conodonts from the Mithaka Formation (Georgina Basin, Australia). Regional and paleobiogeographical implications [PDF]

, 2005
The systematic analysis of conodonts from the previously unstudied Mithaka Formation (Georgina Basin) yielded 1366 identifiable elements, representing 25 species and 21 genera. One new species was recovered and identified, Triangulodus mithakensis n. sp.
Barnes, C. R., Kuhn, T. S.
core   +3 more sources