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In order to establish the distribution pattern of fine-grained sedimentary rocks and clarify the coupling relationship between lacustrine organic-rich fine-grained sedimentary rocks and tight oil reservoir, the Chang7 Member of Triassic Yanchang Formation in Longdong area was taken as an example to be studied by core description and log interpretation, gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). Lacustrine organic-rich fine-grained sedimentary rocks were divided into shale and mudstone according to their lithology and texture. The results show that the shale is mainly developed in Chang73 Sub-member, while the mudstone is developed in each sub-member of Chang7 Member. The organic-rich fine-grained sedimentary rocks in Bazhu-Maling-Qingcheng-Huachi area are the thickest in Longdong area. During the Chang73 sedimentary period, the shale was widely distributed in the center of the lake. In the Chang72 sedimentary period, the mudstone and turbidite were interstratified and superimposed. During the Chang71 sedimentary period, the mudstone was only distributed as thin layers between the thick turbidite. The Chang7 tight oil is widely distributed in the turbidite sand bodies, and it is mainly sourced from the Chang73 shale. The distribution of tight oil is controlled by the development of organic-rich fine-grained sedimentary rocks. [ABSTRACT FROM AUTHOR]

The oil discovery in the Precambrian basement fractured buried-hills of the Bongor Basin, Chad, is a milestone for the African onshore exploration play. Geochemical techniques including GC, GC/MS were adopted to analyze the biomarker composition and geochemical characteristics of oils from the Baobab buried-hill and shales from the Baobab N and Mimosa (MM) sags, respectively. The oil-source correlations were carried out for the buried hill oils and source rocks of BN/MM sags, and the hydrocarbon accumulation process was interpreted based on the thermal evolution history. The results indicate that BN/MM sags have contributed to the oils of the Baobab buried-hill field along with two phases of hydrocarbon accumulations. The MM sag started to expel hydrocarbon in the middle Late Cretaceous (about 85 Ma), and then in the late Late Cretaceous (about 70 Ma) both the MM and BN sags expelled hydrocarbons for the Baobab buried-hill trap. [ABSTRACT FROM AUTHOR]

The title compound, 1, with the formula [Mn2(pmt)2(1,10-phen)2].2ClO4 [N-(2-pyridylmethylidene)taurine (abbreviated as pmt), consists of a structurally centrosymmetric dinuclear MnII complex and two discrete perchlorate anions. Each Mn center is six-coordinated with an N4O2 donors set of the pmt and 1,10-phenanthorline ligands, resulting in a compressed octahedral. In the crystal packing, the component cations interact with pairs of intermolecular C-H···O and π-π contacts forming a 2-D network. Also, the neighboring 2-D cationic layers are connected to each other with C–H···O interactions of perchlorate oxygen atoms with the separate C···O distances of 3.204(7)-3.365(8) Å, giving a supramolecular 3-D network. [Supplemental materials are available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.] [ABSTRACT FROM AUTHOR]

A new Schiff base compound, (E)-N'-(5-bromo-2-hydroxy- benzylidene)-4-(quinolin-8-yloxy)butanehydrazide, 1, was synthesized and characterized by elemental analysis, IR spectrum, 1HNMR, and single crystal X-ray diffraction. The asymmetric unit of 1 contains two crystallographic independent molecules with different conformations along the bond sequence linking the benzene and quinoline rings, which have a mean interplanar dihedral angle of 58.9(6) and 10.2(6)°, respectively. In the crystal, the molecules are linked through hydrogen bonds of N-H...O and C-H...O to form an infinite 1-D chain, which is further extended to a supramolecular 3-D network via Br...Br and π...π interactions. The fluorescence property of the compound 1 was investigated. [ABSTRACT FROM AUTHOR]