Effect of F1 Fault on Formation and Preservation of Kela-2 Gas Field

Abstract

Abstract: The development and evolution of F1 fault is analyzed. The effect of F1 fault on forming Kela-2 gas field in Tarim basin is simulated by using the self-designed model. The pathway for gas migrating upward generated and discharged from Jurassic and Triassic source rocks in active F1 fault. The result shows its lttle contribution to the shape of Kela-2 gas field for the loaing velocity of gas through FI fault zone is bigger than the velocity of gas entering into Kela-2 gas field. The physical model experiment provides the plastic deformation limit of gypsum and mudstone and the minimum contents of gypsum and mudstone to seal gas in F1 fault zone. The fault plane pressure and the contents of gypsum and mudstone are used for evaluation of seal feature in static F1 fault zone, indicating its good vertical seal and favorable preservation for gas accumulation in Kela-2 gas field.

Key words: Tarim basin, Kela-2 gas field, fault, experiment, hydrocarbon migration, seal

CLC Number:

TE112.12

FU Guang, ZHU Yan-he, FU Xiao-fei. Effect of F1 Fault on Formation and Preservation of Kela-2 Gas Field[J]. Xinjiang Petroleum Geology, 2005, 26(5): 513-516.

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