牛庄洼陷岩性油藏含油气性及主控因素

doi:10.11743/ogg20040309

Abstract

Abstract:

Sandbodies in Niuzhuang sag are mainly distributed in deep sag, area between deep sag and gentle slope zone,as well as central low upwarped area. They can be divided into 3 types, i.e. subaqueous alluvial fan, deep water turbidity fan, and frontal slump turbidity fan, of which the subaqueous alluvial fan sandbodies are thick and have good poroperm characteristics and oil/gas shows, while the oil/gas shows in deep water turbidity fan sandbodies are poorer, and that in slump turbidity fan sandbodies are the poorest. The main factors that control oil/gas shows in sandbodies are burial depth, sedimentary facies and types of sandbodies, as well as structural setting, poroperm characteristics and pressure of sandbodies. Reserves and oil saturation in sandbodies would significantly be heightened along with the increasing burial depth. The better the sandbodies'poroperm characteristics are, the better the oil/gas shows would be. They would also be significantly improved with increasing pressures. They are good in the deep sag, and become poorer towards the gentle slope zone, and become the poorest in the central low upwarped zone.

Key words: Niuzhuang sag, lithologic reservoir, main control factor, reservoiring mechanism

CLC Number:

TE112.322

Gao Yongjin, Qiu Guiqiang, Chen Dongxia, Zhang Jun. Oil/gas shows in lithologic reservoirs in Niuzhuang sag and their main controlling factors[J]. Oil & Gas Geology, 2004, 25(3): 284-287,299.

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Oil/gas shows in lithologic reservoirs in Niuzhuang sag and their main controlling factors

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