Results 51 to 60 of about 206,413 (198)

Gravel roundness quantitative analysis for sedimentary microfacies of fan delta deposition, Baikouquan Formation, Mahu Depression, Northwestern China

, 2020
Gravel roundness is one of the simple but crucial parameters in particle shape, which is related to the transportation and deposition of sediments.
J. Tao, Changmin Zhang, Rui Zhu
semanticscholar   +1 more source

Influence of sedimentary microfacies on the rock mechanics of ultra-deep reservoirs and its application: a case study of the Cretaceous formation in the BZ gas field of Kuqa Depression, Tarim Basin

Shiyou shiyan dizhi
To optimize the identification of sweet spots with natural fracture development in ultra-deep tight sandstone reservoirs of Cretaceous in the Kuqa Depression, Tarim Basin, this study systematically analyzed the differences in rock mechanical properties ...
Zhimin WANG, Haitao SUN, Hui ZHANG, Chenguang WANG, Guoqing YIN, Ke XU, Dakang ZHONG   +6 more
doaj   +1 more source

Study of Sedimentary Facies and Depositional Environment in Qamchuqa Formation at Northern Iraq [PDF]

Kirkuk Journal of Science, 2016
Qamchuqa Formation rocks are part of eighth cycle of the Arabian plate (AP8). The rock sequences of this cycle deposited in Late Tithonian - Early Turonian.
Nabil Y. Al-Banna, Zahra A. Hussein Al-Bayati   +1 more
doaj   +1 more source

A study of the sedimentary reservoir in the middle sub-member of the first member of the Liushagang Formation in the Weizhou-11A Oilfield, Beibu Gulf Basin

Dizhi lixue xuebao, 2023
The sedimentary lithology is complex in the middle sub-member of the first member of the Liushagang Formation(L1-M) of the Weizhou-11A oilfield in the southwest Weizhou depression of the Beibu Gulf Basin.
CHENG Yuehong, LI Mao, YU Xinghe
doaj   +1 more source

Seismic Stratigraphic Slice Continuous Browsing Technology to Delicately Characterize River Sedimentary Microfacies [PDF]

E3S Web of Conferences
G4 oil formation is divided into three sets of sand formations, namely, G4 upper, G4 middle, and G4 lower sand formations, and divided into small layers in detail.
Gao Feng
doaj   +1 more source

Recognition of fossil keratose sponges in carbonates using petrographic and machine‐learning classification

Sedimentology, EarlyView.
ABSTRACT Filamentous, anastomosing spar‐filled networks in Phanerozoic carbonates have been interpreted as the mineralised remains of keratose (non‐spiculate) sponges, yet their recognition remains contested because fabrics of broadly similar appearance may arise from microbial, diagenetic or physical processes. This study combines direct fossil–modern
Jeong‐Hyun Lee, Seung‐Sep Kim, Cui Luo   +2 more
wiley   +1 more source

Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China

Open Geosciences, 2021
Datong Basin is a platform uplift formed in the Cenozoic era and has a significant coal-bearing geological unit in China. Tashan Mine is located in the middle-eastern part of the Datong Basin, the coal resources of the Taiyuan Formation are abundant, and
Duan Hongyue, Xie Weidong, Zhao Jianguang, Jia Tengfei   +3 more
doaj   +1 more source

Sedimentary Characteristics and Their Controlling Factors of Lower Cretaceous Fan Deltas in Saidong Sub-Sag of Saihantala Sag, Erlian Basin, Northeastern China

Energies, 2022
Fan deltas of the Lower Cretaceous area in Saihantala sag, Erlian Basin have been identified as major petroleum exploration opportunities. The sedimentary evolution is, however, still debatable, which hinders insights into its controlling factors.
Bo Yan, Hongqi Yuan, Xuanlong Shan, Tianqi Zhou, Shengfei Liu   +4 more
doaj   +1 more source

Multi‐proxy sequence stratigraphy of a mixed carbonate–siliciclastic shelf across the Jurassic–Cretaceous transition

The Depositional Record, Volume 12, Issue 4, September 2026.
An integrated facies, MS and XRF‐based approach applied to the Tithonian–Berriasian Sidi Khalif Formation (central Tunisia) resolves five Tithonian and eight Berriasian third‐order sequences, showing how mixed carbonate–siliciclastic shelves record coupled eustatic, climatic and tectonic controls and providing a transferable template for similar mud ...
Hamdi Omar, Adnene Lafi, Chokri Yaich
wiley   +1 more source

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

Sedimentology, Volume 73, Issue 5, Page 1631-1663, August 2026.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi, Isabel Abad, Elisa Laita, Ali Mokhtar Samet, Matías Reolid   +4 more
wiley   +1 more source