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Anisotropy of Stable Single Domain Ferrimagnetic Particles in a Rock Sample from Gyroremanent Magnetization and Comparison with Other Anisotropy Methods

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Journal of Modern Physics 2019年第6期10卷 673-686页

作者： Liam L. Belisle David K. Potter Brendan C. Snow Allyson L. Shewchuk Department of Physics University of Alberta Edmonton Canada cnooc petroleum north america ulc Calgary Canada

The orientation of stable single domain (SSD) ferrimagnetic particles in an igneous rock sample was determined by a sensitive technique utilizing gyroremanent magnetization (GRM). Components of GRM were measured in the sample upon exposure to an alternating field (AF) at various orientations in 3 orthogonal planes. The major components of GRM exhibited a sin(2θ) dependence on AF orientation in the respective perpendicular planes. This was in accordance with theory [1] and contrary to some previously reported experimental results on magnetic recording tape, which produced a distorted sin(2θ) dependence of the GRM [1]. The explanation is likely due to the SSD ferrimagnetic particles in the rock sample being more dispersed (less interacting) compared to the highly interacting SSD particles in the magnetic tape sample of the previous study. The GRM results were consistent with another remanence anisotropy method, anisotropy of isothermal remanent magnetization (AIRM). This method again measures the anisotropy of the remanence carrying ferrimagnetic particles, but the IRM is also acquired by larger multidomain (MD) particles as well as by the SSD particles. The results were also consistent with the visible rock anisotropy (petrofabric), the anisotropy of magnetic susceptibility (AMS), and the shear wave velocity anisotropy. A comparison of all the methods demonstrated that the fine SSD particles, which make up only a small proportion of the rock, were aligned in quite a similar orientation to that of the main rock forming minerals that constituted the bulk of the sample.

关键词： Anisotropy Gyroremanence Isothermal Remanence Magnetic Susceptibility Shear Wave Velocity

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Late Miocene Red River submarine fan,northwestern South China Sea

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Chinese Science Bulletin 2011年第14期56卷 1488-1494页

作者： WANG YingMin XU Qiang LI Dong HAN JianHui LU Ming WANG YongFeng LI WeiGuo WANG HaiRong College of Geosciences China University of Petroleum Beijing 102249 China State Key Laboratory of petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China The Research Institute of cnooc Beijing 100027 China School of Energy Resources Chengdu University of Technology Chengdu 610059 China BP america Inc Houston TX 77079 USA School of Energy Resources China University of Geosciences Beijing 100083 China

A huge submarine fan is discovered through the research of the seismic and borehole data in the binding site of Yinggehai basin and Qiongdongnan basin in northwestern South China *** fan,mainly formed during Late Miocene (Huangliu period) has an area over 10000 km 2 and maximum thickness of over 2000 *** is characterized by a wedge-shaped oblique progradation configuration on the dip profile and a hummocky bidirectional progradation configuration on the strike *** core and Logging data from the well YC35-1-2 located in the front side of the fan indicate that sandy gravity flow deposits are predominant in lower Huangliu Formation and change to interbeds of sand and mud in upper Huangliu *** fan is interpreted as a sand/mud-rich submarine fan in combination with the bathyal geological background of Huangliu period.A preliminary analysis of provenance indicates that neither the Guiren Uplift in the west nor the Hainan Uplift in the north can serve as the major provenance for the submarine *** provenance is considered to be from the Red River,based on the sedimentary facies study of the Huangliu Formation in Yinggehai *** fan is thus named as "Red River submarine fan".The Red River depositional system consists of the Red River submarine fan,the Red River delta,and associated submarine *** discovery of the Red River submarine fan provides important information for the research of the uplift of Tibetan Plateau and the evolvement of Red River Fault ***,it also points out a new direction for the deepwater hydrocarbon exploration in the northern South China Sea.

关键词：红河断裂带南海西北部晚中新世海底扇中国莺歌海盆地配置文件青藏高原隆升

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Preparation and Performance of Salt Tolerance and Thermal Stability Cellulose Nanofibril Hydrogels and Their Application in Drilling Engineering

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Paper And Biomaterials 2019年第2期4卷 10-19页

作者： XiongLi Liu An Wang ChunPing Wang JiaLei Qu YangBing Wen Bin Chen ZhongGuang Wang BinBin Wu ZhaoYang Yuan Bing Wei Tianjin Key Laboratory of Pulp and Paper Tianjin University of Science and TechnologyTianjin300457China cnooc Drilling&Production Technology Research Institute Tianjin300457China Tianjin Woodelf Biotechnology Co. Ltd.Tianjin300457China Department of Biochemistry&Molecular Biology Michigan State UniversityEast LansingMichigan48824United States of America State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduSichuan Province610500China

The poor salt tolerance,thermal stability,and environmental performance of petrochemicals can severely limit their applications in drilling *** this study,cellulose nanofibril(CNF)hydrogels with improved salt tolerance and thermal stability were prepared,and their filtration performance was *** hydrogels were prepared through the simultaneous grafting of 2-acrylamido-2-methylpropane sulfonic acid(AMPS)and butyl acrylate(BA)onto the CNF surface through ceric ammoniumnitrate-induced radical *** modified and original CNF samples were characterized using Fourier Transform infrared spectroscopy(FT-IR)and rheological *** FT-IR analysis results showed that both AMPS and BA were grafted onto the CNF backbone,affirming the successful preparation of the grafted *** rheological analysis results showed that the modified CNF hydrogels exhibited significantly improved salt tolerance,thermal stability,and“salt-thickening”***,the results of the fluid loss test showed that the modified CNF hydrogels exhibited a much better fluid loss control than the original CNF *** addition,after adding 2%modified CNF hydrogels as a filtrate reducer in the drilling fluids prepared with a 6%combined salt solution,the filtrate loss was significantly reduced even after aging for 72 h at 160℃.

关键词： cellulose nanofibril hydrogel grafting filtrate reducer,drilling fluid

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