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| 1 | Pore Characteristics of the Fine-Grained Tight Reservoirs in the Yabulai Basin, Northwestern China显示文摘This work investigated the pore structure characteristics and reservoir features of the finegrained tight reservoirs in the lower member of the Xinhe Formation(J_2 x_1) in the Xiaohu subsag,Yabulai Basin based on core samples through various techniques. Interbedded silt/fine sandstones and mudstones are developed in the study area. Scanning electron microscopy(SEM) images were used to delineate different types of pores, including primary intergranular pores, secondary intergranular and intragranular pores, organic pores and fractures. The pore types were distinguished by pore size, pore area, location and formation process. The pore radii of the fine-grained rocks range from 1 nm to 1.55μm, mainly concentrated between 5 and 300 nm by low pressure N_2 adsorption and MICP analyses. The pore structure parameters of pore throat size and pore throat sorting coefficient are both positively correlated with porosity, while pore throat sorting coefficient has a negative correlation with permeability. The pore structures of the studied samples are much related to the mineral type and content and grain size, followed by TOC content. In these rocks with relatively low TOC and low maturity, the rigid minerals protect pores with pressure shadow from collapse, and dissolution-related pores contribute a lot to inorganic porosity. In contrast, these rocks with abundant TOC contain a large number of organic pores. The permeability of the fine-grained tight reservoir is mainly dominated by larger pore throats, while a large number of small pores(mostly <0.1 μm) contribute considerably to porosity. These results have deepened our understanding of the interbedded fine-grained tight reservoirs and can be applicable to fine-grained reservoirs in a similar setting. | ZHANG Shaomin CAO Yingchang Jens JAHREN ZHU Rukai MAO Zhiguo XI Kelai Kashif MUHAMMAD Helge HELLEVANG | 2018 | Acta Geologica Sinica(English Edition)2018，92，3： | 5 |
| 2 | Quartz cementation in Late Cretaceous mudstones,northern North Sea:Changes in rock properties due to dissolution of smectite and precipitation of micro-quartz crystals显示文摘 | Thyberg B Jahren J Winje T | 2010 | Marine and Petroleum Geology2010，27，8： | 1 |
| 3 | Can C plants faithfully record the carbon isotopic composition of atmospheric carbon dioxide显示文摘 | Arens N C Jahren A H Amundson R | 2000 | Paleobiology2000，26，1： | 1 |
| 4 | The biogeochemical consequences of the mid-Cretaceous superplume显示文摘 | JAHREN A H | 2002 | Journal of Geodynamics2002，34，： | 1 |
| 5 | Dental anxiety in a representative sample of residents of a large German city显示文摘 | Enkling N Marwinski G Jahren P | 2006 | CtinOral Investig2006，10，1： | 1 |
| 6 | Compositional variations in diagenetic chlorite and illites, and relationships with formation-water Chemistry 显示文摘 | Jahren J S and Aagaard P | 1989 | Clay Minerals1989，24，： | 1 |
| 7 | Can C3 plants faithfully record the carbon isotopic composition of atmospheric carbon dioxide? 显示文摘 | Arens N C Jahren A H Amundson R | 2000 | Paleobiology2000，26，： | 1 |
| 8 | Terrestial record of methane hydrate dissociation in the early Cretaceous 显示文摘 | Jahren A H Arens N C Sarmiento G | 2001 | Geolohy2001，29，2： | 1 |
| 9 | Terrestrial record of methane hydrate dissociation in the Early Cretaceous显示文摘 | Jahren A H Arens N C Sarmiento G | 2001 | Geology2001，29，： | 1 |
| 10 | Swelling and viscoelastic eharaeterisation of pH-responsive ehitosan hydrogels for targeted drug delivery显示文摘 | Jahren SL Butler MF Adams S | 2010 | Maeromol Chem Phys2010，211，6： | 1 |
| 11 | Terrestrial record of methane hydrate dissociation in the Early Cretaceous 显示文摘 | Jahren A H Arens N C Sarmiento G | 2001 | Geology2001，29，2： | 1 |
| 12 | Methane release from igneous intrusion of coal during late Permian extinction events显示文摘 | Retallack G J Jahren A H | 2008 | The Journal of Geology2008，116，1： | 1 |
| 13 | Open or closed geochemical sys-tems during diagenesis in sedimentary basins:Constraintson mass transfer during diagenesis and the prediction ofporosity in sandstone and carbonate reservoirs 显示文摘 | Bjorlykke K Jahren J | 2012 | AAPGBulletin2012，96，12： | 1 |
| 14 | Aerobic moving bed biofilm reactor treating tbermomeehanieal pulping whitewater underthermophilic conditions显示文摘 | Jahren S J Rintala J A 0degaard H | 2002 | Water Research2002，36，4： | 1 |
| 15 | Open or closed geochemical systems during diagenesis in sedimentary basins: Constraints on mass transfer during diagenesis and the prediction of porosity in sandstone and carbonate reservoirs显示文摘 | Bj?rlykke K Jahren J | 2012 | AAPG Bulletin2012，96，12： | 1 |
| 16 | Reliability comparison for sheet-pile cellular structures显示文摘 | Jahren T | 1990 | Journal of Performance of Constructed Facilities1990，4，4： | 1 |
| 17 | Treatment of thermomechanical pulping (TMP) whitewater in thermophilie (55 ℃) anaerobic-aerobic moving bed biofilm reactors 显示文摘 | Jahren Sigrun J Odegaard HaIlvard | 1999 | Water Sci Technol1999，40，8： | 1 |
| 18 | Terrestrial record of methane hydraw dissociation in the Early Cretaceous 显示文摘 | Jahren A H Arens N C Sarmiento G | 2001 | Geology2001，29，： | 1 |
| 19 | Reliability comparison for sheet-pile cellular structures 显示文摘 | Charles T Jahren | 1991 | Journal of Performance of Constructed Facilities1991，，4： | 1 |
| 20 | Effects of recycled materials on long-term performance of cold in-place recy- cled asphalt roads显示文摘 | Chen D Jahren C T Lee H D | 2009 | Journal of Performance of Con- structed Facilities2009，24，3： | 1 |
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