阿尔伯塔南部高分辨航磁研究：可能探测到的烃渗漏效应

通过对阿尔伯塔南部的Ｃｙｐｒｅｓｓ丘陵区域航磁测量资料的研究分析发现,伴有断层构造的低幅、高频磁异常分布与已知油层的分布位置相关,由此提出了一种直接探测油气藏的潜在技术方法。     

Characterization of Microscopic Pore Structures in Shale Gas Reservoirs of the Southeast Chongqing

<正>Unlike traditional resources,mud shale has the characteristics of low porosity,low permeability,small pore structure,nanoscale pore as the main body.The microscopic pore structures of mud shale can not only influence the occurrence state of shale gas and gas content,but also influence the hydrocarbon expulsion efficiency of source rocks,which makes the study of shale gas reservoir     

Dispersal of the Zhujiang River (Pearl River) derived sediment in the Holocene

High-resolution Chirp profiling and coring reveals an elongated(ca. 400 km) Holocene Zhujiang River(Pearl River)-derived mud area(maximum thickness 20 m) extending from the Zhujiang River Delta, southwestward off the Guangdong coast, to the Leizhou Peninsula. Two depo-centers, one proximal and one distal, are identified. On the continental shelf off the west Guangdong Province, the mud is deposited in water depth shallower than 50 m; while to the southeast of the Zhujiang River Estuary, the mud area can extend to the-120 m isobath. A combined analysis with the stratigraphic sequences of other muddy deposits in the Western Pacific marginal seas(mainly Changjiang(Yangtze) and Huanghe(Yellow) Rivers derived) indicates that the initiation of the Zhujiang River muddy deposit can be further divided into two stages: Stage 1 is before the mid-Holocene sea-level highstand(ca. 7.0 cal. ka BP), the proximal mud was mostly deposited after 9.0 cal. ka BP, when the sea-level rose slowly after the Meltwater Pulse-1C; Stage 2, after the mid-Holocene sealevel highstand, clinoform developed on the continental shelf off the west Guangdong Province, extending ca. 400 km from the Zhujiang River Estuary. The proximal clinoform thins offshore, from ca. 10 m thickness around 5–10 m water depth to less than 1–2 m around 20–30 m water depth. In addition, we also find a developed distal clinoform in the east of the Leizhou Peninsula.     

Spectrum Analysis of Wind Profiling Radar Measurements

Unlike previous studies on wind turbulence spectrum in the planetary boundary layer, this investigation focuses on high-altitude （1-5 km） wind energy spectrum and turbulence spectrum under various weather conditions. A fast Fourier transform （FFT） is used to calculate the wind energy and turbulence spectrum density at high altitudes （1-5 km） based on wind profiling radar （WPR） measurements. The turbulence spectrum under stable weather conditions at high altitudes is expressed in powers within a frequency range of 2 × 10-5-10-3 s-1, and the slope b is between -0.82 and -1.04, indicating that the turbulence is in the transition from the energetic area to the inertial sub-range. The features of strong weather are reflected less obviously in the wind energy spectrum than in the turbulence spectrum, with peaks showing up at different heights in the latter spectrum. Cold windy weather appears over a period of 1.5 days in the turbulence spectrum. Wide-range rainstorms exhibit two or three peaks in the spectrum over a period of 15-20 h, while in severe convective weather conditions, there are two peaks at 13 and 9 h. The results indicate that spectrum analysis of wind profiling radar measurements can be used as a supplemental and helpful method for weather analysis.     

Sandstone Control Factors of Oil of the Third Member of Shahejie Formation in Dawangzhuang Area in Raoyang Sag

<正>In the process of oil and gas exploration,Hydrocarbon Assesment become more and more important.In this paper,the effection to hydrocarbon of the physical properties of the third member of Shahejie Formation in Dawangzhuang area is analyzed.By logging data analysis,the oil-saturation grade of Es3 in Dawangzhuang region can be divided into rich in oil,oil imersiond,oil     

Latest Progress and Trend Forecast of China's Shale Gas Exploration and Development

<正>1 Introduction With almost five years of efforts,we have made major breakthrough and important advances in shale gas in many areas,such as the marine and continental shale in Sichuan Basin,the continental shale in Erdos Basin and the transitional shale in North China.China has begun shale gas productivity constructions in many shale gas     

Haitaite-(La), LaU4+Fe3+2(Ti13Fe2+4Fe3+)Σ18O38, a New Member of the Crichtonite Group

Haitaite-(La), (La, Ce)(U4+, U6+, Fe2+)(Fe3+, Al)2(Ti, Fe2+, Fe3+)18O38, is a new member of the crichtonite group. It is named after the Haita Village in the Miyi County of Sichuan Province, China, where the mineral was discovered. The mineral occurs as black opaque centimeter-sized aggregates in the external contact zone between the Neoproterozoic (~800 Ma) alkali feldspar granite and the Mesoproterozoic (~1700 Ma) micaschist. In the studied sample, haitaite-(La) is associated with other minerals, including ilmenite, magnetite, rutile, zircon, brannerite and uraninite. The new mineral is a black, metallic phase and has a Mohs hardness of 6, with a density of 4.99 g/cm3 (calculated) and 5.03 g/cm3 (measured). Haitaite-(La) is opaque in transmitted light and grayish-white under reflected light, with a reflectivity between 22.5% and 16.42% in the 400–700 nm band (SiC, in the air). The compositions of the mineral were measured by EPMA, the U4+/U6+ ratio was determined by X-ray photoelectron spectroscopy and the Fe2+/Fe3+ ratio was determined by M?ssbauer spectroscopy. Haitaite-(La) is trigonal, belongs to R3ˉ and has unit-cell parameters a = 10.3678(5) ?, c = 20.8390(11) ?, V = 1939.9(2) ?3, Z = 3. The crystalline structure is composed of octahedra with 9 layers of close-packed octahedra (M1, M3, M4, M5), tetrahedra (M2) and contains large 12-coordinated M0 sites.     

Effect of light intensity on bound EPS characteristics of two Microcystis morphospecies: the role of bEPS in the proliferation of Microcystis

Bound extracellular polymeric substances(bEPS) play an important role in the proliferation of Microcystis.However,the understanding of bEPS characterization remains limited.In this study,threedimensional fluorescence excitation-emission matrix(3D-EEM) spectroscopy and zeta potentiometer were used to characterize the loosely bound EPS(LB-EP S) and tightly bound EPS(TB-EPS) from two dominant Microcystis morphospecies from Taihu Lake(China) at different light intensities.Physiochemical analysis sho...     

Magnetostratigraphy of a Loess-Paleosol Sequence from Higher Terrace of the Daduhe River in the Eastern Margin of the Tibetan Plateau and Its Geological Significance

<正>The eolian deposits distributed in the river valleys in the eastern margin of the Tibetan Plateau(TP)are very useful in neotectonic and paleoclimatic studies.Firstly,the climate in the eastern margin of the TP is mainly controlled by the Indian summer monsoon,and detailed studies on the loess-paleosol sequences in this region can provide valuable terrestrial evidence of past changes in the Indian summer monsoon.Secondly,the river terraces in the eastern margin of the TP are considered to be a sensitive recorder of neotectonism to reflect the timing and amplitude of the TP uplift.The formation ages of these