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On the basis of GR log analysis alone, the high GR sandstone reservoirs would probably have been regarded as mudstone and interpreted to be non-reservoir, which has greatly affected the exploration and exploitation of oil and gas reservoir to some extent.
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In order to improve the accuracy of logging lithology identification of high natural gamma sandstone in Wunan depression in Hailar Basin,in terms of rock core and microscopic sections description and logging analysis,the causes and identification of high gamma sandstones were discussed.The classification of the sandstone CNL values can provide
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Nov 07, 2022:www. stae. com. cn 3 Fig 3 Zoning map of hydrogeological parameters of the study area 1 Table 1 Preliminary values of hydrogeological parameters by region / (ms － 1 ) Kx Ky ＝ Kx Kz ＝ 1 / 10Kx Ⅰ 4 3 10 － 4 4 3 10 － 4 4 3 10 － 5 0 20 Ⅱ 8 8 10 － 5
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Oct 01, 2020The Chang 7 Member is mainly composed of argillaceous rocks, and with less than 20% of sand and formation ratio. From bottom to top, the Chang 7 Member can be further divided into three sub-members (Chang 73, Chang 72, Chang 71), and they are mainly semi-deep to deep lake sub-facies (Fig. 2).
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The authors of 'Genesis of the high gamma sandstone of the Yanchang Formation in the Ordos Basin, China' questioned the viewpoint that high-gamma-ray sandstone might be caused by homochronous sedimentary volcano tuff ash or previous tuff. The authors argued that the main reason for the high-gamma-ray sandstone should be from high Th and U contents in zircon.
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Sep 01, 2016We compared the fracture-response characteristics of conventional logs based on two data sets, one from 8 cored wells with fracture intensities greater than 1 m −1 (3.3 ft −1) and the other from 11 cored wells with fracture intensities less than 0.5 m −1 (1.6 ft −1), with a case study of the Upper Triassic Yanchang Formation in
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Characteristics of neotectonic faulting in the Mount Lofty and Flinders Ranges, South Australia
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experimentally quantified the effects of kerogen richness and temperature on elastic responses of shales and conducted torsional experiments in two shale samples from the Green River Formation in the seismic frequency band (e.g. 0.01–80 Hz) with simultaneous temperature changing from 30 to 350 C. The results demonstrate that the frequency
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Nov 01, 2016The massive fine-grained sandstone has a box-shaped GR log curve and the smallest gamma ray value (88–95 API). The graded sandstone to muddy siltstone has a bell-shaped GR log curve with GR value from 90 to 110 API, and the oil shale and mudstones have the highest value of more than 120 API and an irregular GR signature.
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in this paper, taking the upper triassic yanchang formation in the western ordos basin as an example, the development characteristics, prediction method, and the distribution of fractures in tight sandstone reservoirs in low-amplitude structural areas have been systematically studied using a large number of cores, thin sections, paleomagnetism,
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recently more attention has been paid on the high gamma sandstone reservoirs of the yanchang formation in the ordos basin china these high gamma sandstone محبوبترین نویسندگان :
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The high sun of the Tropics makes this area much warmer than the poles, and in summer the high sun and long days make the region much warmer than in winter. In the northern hemisphere, the sun climbs high in the sky and the days are long in summer, around July, when the northern end of the earth's axis is tilted toward the sun. At the same
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Search: Rimworld Need Material Bug. Plus residual control You do not need to interact with the builders once they start working Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation The site must be located and cleaned The Project aim to add as many weapons to RimWorld as possible from old day.
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According to The Yanchang Formation is composed of sandstone, this second set of results, high gamma ray values are siltstone, mudstone, and the tuff layer with an estimated related to high uranium and thorium content in the sand- thickness of about 1000 to 1300 m (Qiu et al. 2014). Pet- stone and show no genetic relationship with zircon.
WhatsApp:+8617329420102Ber. Inst. Erdwiss. K.-F.-Univ. Band 20/1 Graz 2014 PANGEO AUSTRIA 2014 Band 20/1 Graz 2014 PANGEO AUSTRIA 2014 . September 2014
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【】：The authors of 'Genesis of the high gamma sandstone of the Yanchang Formation in the Ordos Basin, China' questioned the viewpoint that high-gamma-ray sandstone might be caused by homochronous sedimentary volcano tuff ash or previous tuff.The authors argued that the main reason for the high-gamma-ray sandstone should
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Genesis of the high gamma sandstone of the Yanchang Formation in the Ordos Basin,China:A reply[J].：,2013(1):55-57. ：2; 3 .[J].,2013,25(3):28-35
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Oct 10, 2022Geoscience ›› 2022, Vol. 36 ›› Issue (04): 1087-1094. DOI: 10.19657/j.geoscience.1000-8527.2021.185 • Oil and Gas Exploration • Previous Articles Next Articles Review of the High Natural Gamma Sandstones Associated With Source Rocks in the Chang 7 3 Submember of the Yanchang Formation, Ordos Basin .
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May 27, 2020taking the upper paleozoic coal-bearing tight sandstone formation in the northeast margin of the ordos basin as an example, the present paper has three main objectives: (1) to identify the morphology and distribution of organic-rich clasts in different sedimentary environments; (2) to investigate the classification and sedimentary sequence of
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Genesis of the high gamma sandstone of the Yanchang Formation in the Ordos Basin,China:A reply[J].：,2013(1):55-57. ：2; 3 PAN Yanan,JI Youliang,WANG Tianyun.The Formation Mechanism and Developmental Characteristics of Tight Oil[J].：,2015,89(A01):71-72. ：2; 4
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Here we show that 59 H. sapiens was in the Arabian Peninsula before 85 ka. We describe the Al Wusta-1 (AW-1) 60 intermediate phalanx from the site of Al Wusta in the Nefud Desert, Saudi Arabia. AW-1 is 61 the oldest directly dated fossil of our species outside Africa and the Levant.
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the radioactive source of high-gamma-ray sandstone in well section 1,893-1,898 m is mainly U, Th or K or a mixture of DOO +HQFH RQH FDQQRW FRQFOXGH GHQLWHO WKDW WKH UDGLRDFWLYH source of high-gamma-ray sandstone was the high content of 7K DQG 8 LQ ]LUFRQ Therefore, we suggested that the radioactive source Pet.Sci.(2013)10:55-57
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2020 Minerals Bet - Read online for free.
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The coal-bearing strata are mainly The Middle Jurassic Yan'an Formation, with 1–3 layers of coal seams, the maximum thickness of single layer is 43 m, and the thickness is generally 2–10 m. Yan'an Formation in the Huangling mining area contains 4 layers of coal. The main coal seam is the 4# coal seam with an average thickness of 2.32 m.
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Chinese Journal of Geophysics Volume 53, Issue 1 p. 154-163 Article Characteristics of High-Gamma-Ray Sandstone Reservoirs for Yanchang Formation in Ordos Basin Xiao-Li ZHANG, Xiao-Li ZHANG xiaoli_nwu163 State Key Laboratory for Continental Dynamics/Department of Geology, Northwest University, Xi'an, 710069 China
WhatsApp:+8617329420102According to The Yanchang Formation is composed of sandstone, this second set of results, high gamma ray values are siltstone, mudstone, and the tuff layer with an estimated related to high uranium and thorium content in the sand- thickness of
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Unsere Bestenliste Nov/2022 → Ultimativer Kaufratgeber Ausgezeichnete Md 84627 Aktuelle Angebote Testsieger
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According to The Yanchang Formation is composed of sandstone, this second set of results, high gamma ray values are siltstone, mudstone, and the tuff layer with an estimated related to high uranium and thorium content in the sand- thickness of about 1000 to 1300 m (Qiu et al. 2014).
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Nov 07, 2022:www. stae. com. cn 3 Fig 3 Zoning map of hydrogeological parameters of the study area 1 Table 1 Preliminary values of hydrogeological parameters by region / (ms － 1 ) Kx Ky ＝ Kx Kz ＝ 1 / 10Kx Ⅰ 4 3 10 － 4 4 3 10 － 4 4 3 10 － 5 0 20 Ⅱ 8 8 10
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Geoscience ›› 2022, Vol. 36 ›› Issue (05): 1254-1270. DOI: 10.19657/j.geoscience.1000-8527.2022.047 • Shale Oil Gas Geology • Previous Articles Next Articles Characteristics and Control Factors of the Chang 7 3 Shale Reservoirs in the Southern Ordos Basin . LI Qing 1, 2 (), LI Jiangshan 1, 2, LU Hao 1, 2, QI Fengqiang 1, 2, HE Yu 1, 2, AN Keqin 1, 2, LI Longyu 1, 2,
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The authors of 'Genesis of the high gamma sandstone of the Yanchang Formation in the Ordos Basin, China' questioned the viewpoint that high-gamma-ray sandstone might be caused by homochronous sedimentary volcano tuff ash or previous tuff. The authors argued that the main reason for the high-gamma-ray sandstone should be from high
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Fracturing fluid-induced formation damage; Two-phase flow; Tight gas; Production prediction; Multi-fractured horizontal well A major concern with hydraulic fracturing in tight formation is the fracturing fluid-induced formation damage (FFIFD) for the high capillary pressure and the presence of water-sensitive clays.
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A series of lacustrine and deltaic clastic sediments, which were known as the Yanchang Formation, were deposited duringthistime[3].TheUpperTriassicYanchangFormation, which is underlain by the Middle Zhifang Formation and overlain by the Lower Jurassic Yanan Formation(Figure1; [4]), is a significant oil-producing bed in the Ordos basin [3, 5].
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Dec 01, 2020the yanchang formation, which developed in the upper triassic, was subdivided into ten members (chang 10 to chang 1 from bottom upward), and experienced a complete cycle of lake development: the initial formation and development stage (chang 10 to chang 8); peaking stage (chang 7 to chang 4 + 5) and declining stage (chang 3 to chang 1) ( xu et
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Feb 17, 2016A systematic study on the formation conditions and distribution patterns of N1 tight oil in Zhahaquan Area of the Qaidam Basin was conducted by summarizing and analyzing documents related to geoche
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Oct 15, 2019According to analogous outcrops, cores, and borehole image logs, small faults and intraformational open fractures are developed in the tight-oil sandstones of the Upper Triassic Yanchang Formation in the southwestern Ordos Basin, China. Among them, high dip-angle intraformational open fractures are the most abundant.
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high gamma sandstones of the Yanchang Formation; 2) high gamma (or high Th content) sandstones of Yanchang Formation are not related to either clay minerals or feldspar; 3) the heavy minerals in the VDQGVWRQH UHVHUYRLUV RI WKH DQFKDQJ )RUPDWLRQ DUH GRPLQDWHG E ]LUFRQ ZKLFK LV FKDUDFWHUL]HG E
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In permeable sandstone reservoir saturated with uranium bearing formation water, the U +6 can be deoxidized into U +4 by oil and gas migrating through faults and stratigraphic unconformities, and accumulates in the form of UO 2 in sandstones. Access through your institution Add to Cart Info: Periodical: Applied Mechanics and Materials (Volume 394)
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