Results 61 to 70 of about 1,764,929 (191)

Drowned carbonate‐rimmed margin controlling shelf‐edge delta progradation and sedimentation dynamics: Upper Cretaceous Woodbine Formation, Texas, USA

Sedimentology, EarlyView.
ABSTRACT Shelf‐edge deltas are commonly interpreted to record basinward facies migration across uninterrupted, gently dipping shelf margins; however, examples from mixed siliciclastic‐carbonate margins reveal more complex depositional dynamics. Periods and areas of carbonate sedimentation within mixed siliciclastic‐carbonate margins can modify shelf ...
Abdulkarim Al‐Hussaini, Cornel Olariu, Charles Kerans, Ronald Steel   +3 more
wiley   +1 more source

Siliceous sponges or seawater as a silicon source? Tracing silicon burial pathways of the Upper Cretaceous opal‐CT deposits using δ30Si and δ7Li

Sedimentology, EarlyView.
ABSTRACT Classical models of formation of sedimentary siliceous rocks (flint, chert, opoka) commonly assume that the Cretaceous marine silicon (Si) cycle was primarily biologically controlled, broadly analogous to the modern ocean. In this framework, siliceous sponges are regarded as the principal source of dissolved silica (dSi) to sediment porewaters,
Agata Jurkowska, Ewa Świerczewska‐Gładysz, Marek Szczerba, Tomáš Magna, Szymon Kowalik Filipowicz   +4 more
wiley   +1 more source

Geological conditions and exploration potential of Permian marine–continent transitional facies shale gas in the Sichuan Basin

Natural Gas Industry B, 2019
Marine–continent transitional facies shale of the Longtan Fm, Upper Permian is an important source rock stratum in the Sichuan Basin. The previous researches on it mainly focus more on source rock evaluation, but less on shale gas accumulation.
Xusheng Guo, Dongfeng Hu, Ruobing Liu, Xiangfeng Wei, Fubin Wei   +4 more
doaj   +1 more source

Exploration domains and technological breakthrough directions of natural gas in SINOPEC exploratory areas, Sichuan Basin, China

Journal of Natural Gas Geoscience, 2020
Natural gas exploration in SINOPEC's exploratory areas in the Sichuan Basin has achieved rapid development. Since discovering the Xinchang gas field, natural gas exploration has expanded gradually, with both reserves and production growing fast.
Shengxiang Long, Zhe Cheng, Huaming Xu, Qian Chen   +3 more
doaj   +1 more source

Quantification of dryland depositional environments across contrasting fluvio‐aeolian and fluvio‐lacustrine transects: An integrated subsurface and outcrop analogue study of the Organ Rock Formation, Utah, USA

Sedimentology, EarlyView.
ABSTRACT The standard subdivision of a distributive fluvial system (DFS) into proximal, medial and distal zones is typically based on the proportion of channel bodies and/or the degree of channel amalgamation, reflecting a downstream fining trend towards a mud‐prone terminal pinch‐out.
Oliver Button, Charlotte L. Priddy, Ross P. Pettigrew, Rachel Brackenridge, Ben A. Kilhams, John A. Howell   +5 more
wiley   +1 more source

FFSwinNet: CNN-Transformer Combined Network With FFT for Shale Core SEM Image Segmentation

IEEE Access
Semantic segmentation, as one of the important branches in the field of computer vision, has made significant progress in recent years. However, in the field of shale exploration, the use of such computer vision techniques has not been widely explored ...
Yilong Feng, Lijuan Jia, Jinchuan Zhang, Junqi Chen   +3 more
doaj   +1 more source

Gravel and sand barrier preservation at geological (Cenozoic) timescales: Insights from the southern Namibia continental shelf

Sedimentology, EarlyView.
ABSTRACT An apparent disconnect exists between the morphology and behaviour of modern coastal barriers and barrier‐associated sediments preserved in the geological record, reflecting modification and selective preservation over geological timescales.
Andrew Green, Andrew Cooper, Marinja Bester, Lynette Kirkpatrick   +3 more
wiley   +1 more source

Geochemical characteristics of marine-continental transitional facies shale and shale gas in Linxing area

, 2021
In order to reveal the geochemical characteristics of shale and shale gas on the east edge of Ordos Basin, thin section identification, full rock and clay content, scanning electron microscope, organic carbon, rock pyrolysis, kerogen macerals, and ...
Cheng, LIU, Wangui, DING, Xueqing, LIU, Peng, WU, Di, CAO, Yangbing, LI, Jianqi, CHEN, Wei, KONG, Yong, LI, Jixian, GAO, Weiqiang, HU, Litao, MA, Xin, CHEN   +12 more
core   +1 more source

Exploration and research progress of shale gas in China

China Geology, 2018
: There are three types of shale gas resources in China. The resources are present in large amounts and are widely distributed. Marine facies, transitional facies and continental facies resources each account for a third. Based on resource distributions,
Gang-yi Zhai, Yu-fang Wang, Zhi Zhou, Shu-fang Yu, Xiang-lin Chen, Yun-xiao Zhang   +5 more
doaj   +1 more source

Evolutions of Oil Generation and Expulsion of Marine-Terrestrial Transitional Shales: Implications From a Pyrolysis Experiment on Water-Saturated Shale Plunger Samples

, 2021
Shale reservoirs are characterized by self-generation and self-accumulation, and the oil generation and expulsion evolution model of organic-rich shales is one of important factors that obviously influence the enrichment and accumulation of shale oil and
Zhou, Qin, Fan, Qizhang, Gao, Ping, Gai, Haifeng, Xiao, Xianming, Cheng, Peng, Li, Tengfei, Haifeng Gai, Qin Zhou, Tengfei Li, Peng Cheng, Xianming Xiao, Qizhang Fan, Ping Gao   +13 more
core   +1 more source