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2016, 35(3) 831-839 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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Accumulation characteristics of tight sandstone gas in Huhehu depression of Hailaer Basin |
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LIU Zhi-wen |
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Exploration and Development Research Institute of Daqing Oilfield Company Ltd. |
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Abstract：
Huhehu depression of Hailaer Basin has suitable geologic conditions for forming large-area tight
Sandstone gas reservoir.Theterraininriftedperiodiswideandgentle,andlatertectonicreworkingisweak.It mainlydevelopedlowamplitudeanticlineorwidegentlesyncline,withlocallystabletectonicconditions.Coal sourcerocksofK1n2strataarewidelydeveloped,theabundanceoforganicmatterisinmediumgoodlevel,which providesgoodmaterialconditionsforformingtightsandstonegasreservoir.ThereservoirsinsubsagofK1n2stratais lowinporosityandspeciallowinpermeability.ThereservoirrocksofK1n2 strataarefrequentlyinterbeddedwith coalandmudstone,whichisfavorableforintersourcegasaccumulationinthetightsandstonereservoir.Tectonic highpartcontrolstheoilandgasabundanceinsomedegree,andthestablenegativereservoirstructuralzoneis conducivetolookingforenrichmentregion.Tightsandstonegasreservoirismainlyintwocombinations,including selfgeneratedandselfstoragetype,andendogenousexternalstoragetype;and oil and gas are distributed in band in NS direction. |
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Keywords：
Huhehu depression
tight sandstone gas
accumulation characteristics
Hailaer Basin
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Received Revised Online: |
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