Results 41 to 50 of about 4,180,288 (152)

Depositional environment variations and organic matter accumulation of the first member of the Qingshankou formation in the southern Songliao Basin, China [PDF]

, 2023
The organic-rich shale in the first member of the Qingshankou Formation, which is located in the southern Songliao Basin, is regarded as a high-quality source rock in East China.
Feng Jinlai, Yan Ma
core   +1 more source

A palynological assemblage of the Qingshankou Formation from the Wudaogou Section, eastern margin of the Songliao Basin, and its implications of paleovegetation and paleoclimate

Frontiers in Earth Science
The pollen and spores found in the Qingshankou Formation at the Wudaogou Section, Bin County, Heilongjiang Province, northeastern China, were studied systematically, and a palynological assemblage was recognized and named Lygodioisporites–Pinuspollenites–
Junhui Li, Xiuli Fu, Jiawei Hao, Qing Liang, Xiang Li, Chenglong Wang, Yinghua Yu, Hongqi Yuan   +7 more
doaj   +1 more source

Controlling factors for oil production in continental shales: A case study of Cretaceous Qingshankou Formation in Songliao Basin

Petroleum Research, 2023
Continental shale oil is widely distributed in the Cretaceous Qingshankou Formation of the Songliao Basin in Northeast China. In the Qijia-Gulong sag and the Changling sag in the Songliao Basin, breakthroughs of shale oil exploration and development have
Bo Zhou, Yuxiang Xiao, Zhengdong Lei, Rui Wang, Shuiqing Hu, Xiulin Hou   +5 more
doaj   +1 more source

Geochemical characteristics and genesis of tight gas in Shahezi Formation, Xujiaweizi Fault Depression, North Songliao Basin, China

Journal of Natural Gas Geoscience, 2020
Along with exploration of unconventional natural gas in North Songliao Basin, the tight gas in Shahezi Formation has become a new hotspot, followed by continual breakthroughs in terms of gas exploration.
Yixuan Ran, Xiang Zhou
doaj   +1 more source

Logging-Based Fracability Evaluation of Shale Oil Reservoirs in the Upper Cretaceous Qingshankou Formation, Central Daqing Placanticline, China

Applied Sciences
Fracability serves as the dominant factor governing the recoverable conditions of shale oil reservoirs. Based on logging data from the Cretaceous Qingshankou Formation in the central Daqing Placanticline, China, combined with core experimental data ...
Yong Chen, Shengzhao Wang, Cui Mao, Youzhi Wang, Dan Gao, Hongqi Yuan   +5 more
doaj   +1 more source

Machine Learning Approaches for Predicting Total Organic Carbon From Petrophysical Well Logs in the Wufeng–Longmaxi Shale, Southeast Sichuan Basin, China

Geoscience Data Journal, Volume 13, Issue 4, October 2026.
This study demonstrates the application of machine learning models—Random Forest, XGBoost, and Multiple Linear Regression—to predict Total Organic Carbon (TOC) from well logs, significantly improving TOC prediction accuracy and reliability across diverse geological settings compared to traditional log‐based methods.
Haseeb Ahmad, Jiang Shu, Naveed Rehman, Muhammad Asad, Muhammad Tariq, Aqib Saeed, Attiqullah Ayaz   +6 more
wiley   +1 more source

A 500‐kyr Pluvial Interval Triggered Lacustrine Carbon Burial in Late Cretaceous East Asia

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract The early Late Cretaceous hothouse was featured by intense storms and a prevailing monsoon climate, yet direct evidence for regional extreme precipitation events is rare. Here, we reconstruct local weathering and hydrological processes using magnesium and strontium isotopes (δ26Mg and 87Sr/86Sr) from lacustrine dolostones in the Upper ...
Yuke Liu, Xiaomei Wang, Minghao Wu, Jin Su, Chengshuai Yuan, Xuening Qi, Shuichang Zhang   +6 more
wiley   +1 more source

Iron–Phosphorus–Carbon Coupled Cycling in Lacustrine System of Ordos Basin During the Middle Triassic

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract Widespread organic‐rich shales are associated with perturbations in productivity or preservation conditions; however, the major controlling factors, especially the phosphorus (P) and iron (Fe) interactions and their impacts on organic carbon burial in the paleolake ecosystem remain poorly understood.
Bo Wang, Rukai Zhu, Pengcheng Ju, Quanyou Liu, Weiming Xu, Peng Li, Wang Zhang, Xinping Liang   +7 more
wiley   +1 more source

Genetic mechanism and petroleum geological significance of calcite veins in organic-rich shales of lacustrine basin: A case study of Cretaceous Qingshankou Formation in Songliao Basin, China

Petroleum Exploration and Development
Based on the observation and analysis of cores and thin sections, and combined with cathodoluminescence, laser Raman, fluid inclusions, and in-situ LA-ICP-MS U-Pb dating, the genetic mechanism and petroleum geological significance of calcite veins in ...
Wenyuan HE, Ningliang SUN, Jinyou ZHANG, Jianhua ZHONG, Jianbo GAO, Pengpeng SHENG   +5 more
doaj   +1 more source

Multiscale NMR Characterization in Shale: From Relaxation Mechanisms to Porous Media Research Frontiers

Energy Science &Engineering, Volume 13, Issue 11, Page 5777-5798, November 2025.
ABSTRACT Nuclear magnetic resonance (NMR), as an advanced non‐destructive and rapid measurement technology, has shown unique advantages in the evaluation of unconventional shale reservoirs. This paper systematically introduces the fundamental principles of NMR spectroscopy and relaxation theory in porous media and comprehensively analyzes the ...
Long Zhou, Guangzhi Liao, Ruiqi Fan, Rui Mao, Xueli Hou, Nan Li, Zhilong He, Yushu Zhang, Lizhi Xiao   +8 more
wiley   +1 more source