The Fan-Delta Sedimentary System and Oil and Gas Characteristics of Tertiary in Ganchaigou Area of Qaidam Basin

Abstract

Abstract: There are two types of fan-delta sedimentary systems-retrogradation type and perch aggradation type that are developed at different lake evolvement in Ganchaigou area of the Qaidam basin. The two systems formed under special geologic background have different composite shapes of genetic facies and reservoir capabilities in which the sand body in underwater distributary channel and mouth bar, the sand-conglomerate body forming in down-coastal gravity flow deposit, the sand body forming in distal turbidite deposit at the delta front of the retrogrative fan-delta have better capability of reservoir and easily form hydrocarbon traps.

Key words: Qaidam basin, Ganchaigou, Tertiary, fan delta, genesis, hydrocarbon-bearing property

CLC Number:

TE111.3

FU Guo-min, LU Xin-bian, SU Jian-ping, LIANG Zhi-lu. The Fan-Delta Sedimentary System and Oil and Gas Characteristics of Tertiary in Ganchaigou Area of Qaidam Basin[J]. Xinjiang Petroleum Geology, 2001, 22(6): 489-491.

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The Fan-Delta Sedimentary System and Oil and Gas Characteristics of Tertiary in Ganchaigou Area of Qaidam Basin

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