Results 31 to 40 of about 1,809,092 (140)

Geochemical characteristics and mechanisms of densification of pre-Jurassic crude oil in the Tainan Sag, Turpan-Hami Basin, China

Unconventional Resources, 2022
Large volumes of heavy oil were distributed in the pre-Jurassic strata of Tainan sag, Turpan Hami Basin, China. The geochemical characteristics and origins of heavy oil are of great significance to future exploration in the region.
Yaao Chi, Bo Liu, Yuchu Chen, Boyang Wang, Longhui Bai, Liu Wang, Yaohui Xu   +6 more
doaj   +1 more source

Hypergraphs Accumulate

International Mathematics Research Notices
Abstract We showthat for every integer $k\geqslant 3$ the set of Turán densities of $k$-uniform hypergraphs has an accumulation point in $[0,1)$. In particular, $1/2$ is an accumulation point for the set of Turán densities of $3$-uniform hypergraphs.
Conlon, David, Schülke, Bjarne
openaire   +2 more sources

Hydrocarbon accumulation process, and effective natural gas accumulation in Permian Changxing Formation, southeastern Sichuan Basin

Shiyou shiyan dizhi
The Permian Changxing Formation in the southeastern Sichuan Basin has complex natural gas accumulation patterns. Using analysis methods such as thermal evolution history reconstruction, rock thin sections, mineral isotopes, and fluid inclusions, this ...
Qianglu CHEN, Binbin XI, Donghua YOU, Hong JIANG, Xian LIU   +4 more
doaj   +1 more source

Combination of alkali–surfactant–polymer​ flooding and horizontal wells to maximize the oil recovery for high water cut oil reservoir

Energy Reports, 2021
Alkali/surfactant/polymer (ASP) combines the advantages of each of the chemical in the blend. ASP has shown to be an effective and practical method to enhance oil recovery.
Jianguang Wei, Jiangtao Li, Xuedong Shi, Runnan Zhou   +3 more
doaj   +1 more source

Geochemical evidence of paleo-depositional environment of Triassic Adula Formation source rocks of eastern Qiangtang Basin

Shiyou shiyan dizhi
The mudstone within the Upper Triassic Adula Formation constitutes a crucial hydrocarbon source rock reservoir in the Qiangtang Basin, yet there is considerable debate regarding its paleo-depositional environment.
Xu LIU, Zhongrong LIU, Xinbing ZHUANG, Zhiwei FAN, Zeliang MA, Jinning PENG, Fengxun LI, Jipeng LI, Xingqiang LI   +8 more
doaj   +1 more source

Main constrains and dynamic process of Ordovician hydrocarbon accumulation, central and western Tahe Oil Field, Tarim Basin

Shiyou shiyan dizhi, 2021
Diversified types of oil and gas resources have been discovered in the Ordovician strata of central and western parts of the Tahe Oil Field, Tarim Basin.
Yongqiang ZHAO, Lu YUN, Bin WANG, Feng GENG, Haiying LI, Yi GU, Yongli LIU   +6 more
doaj   +1 more source

Helium accumulation characteristics and main controlling factors of helium depletion in Daniudi Gas Field, Ordos Basin

Shiyou shiyan dizhi
A certain amount of helium is found in the natural gas of both the Dongsheng and Daniudi gas fields in the Hangjinqi area of the Ordos Basin. However, the average helium content in the Daniudi Gas Field is only about one-fourth of that in the Dongsheng ...
Jie WANG, Chuan AN, Liangbang MA, Haijian JIANG, Wei ZHANG, Cheng TAO, Fubin WANG, Qingwei DONG   +7 more
doaj   +1 more source

Restoration of reservoir diagenesis and hydrocarbon accumulation process by calcite in-situ U-Pb dating and fluid inclusion analysis: A case study on Cretaceous Qingshuihe Formation in Gaoquan Structure, southern Junggar Basin, NW China

Petroleum Exploration and Development, 2023
The complexity of diagenesis and hydrocarbon accumulation in the deep reservoirs in southern Junggar Basin restricts hydrocarbon exploration in the lower reservoir assemblage.
Lili GUI, Qingong ZHUO, Xuesong LU, Wenxia YANG, Weiyan CHEN, Hai WU, Junjia FAN, Yinjun HE, Rizhou CAO, Xiaoqing YU   +9 more
doaj   +1 more source

Tectonic relationship between the Kelameili range and the Dajing depression: Insights into the Carboniferous tectonic-sedimentary framework

Petroleum Exploration and Development, 2020
Based on comprehensive analysis of typical outcrops, latest deep wells drilled and high resolution seismic profiles in the study area, we examined the geologic structure of the Kelameili range, and analyzed the structural relationship between the ...
Lei ZHANG, Dengfa HE, Zejun YI, Di LI
doaj   +1 more source

Accumulations

, 2021
There are several features of complex systems that make creating change in K-12 education difficult, including: delays between the intervention and outcome, unexpected or confusing responses to interventions, and differences in how individuals and groups experience the same systems.
Branz, Mikayla, Farrell, Allie, Hu, Min, Liem, William, Ballard, Ellis   +4 more
openaire   +2 more sources