Differential Hydrocarbon Distribution and Its Main Controlling
Factors of Plat Area in Western Tazhong

doi:10.11885/j.issn.1674-5086.2012.08.30.09

Abstract

Abstract:

There is abundant hydrocarbon in the carbonatite of Tazhong northern slope of Tarim Basin，and there are complicated
and multiple reservoir types in this area，which can be divided into three types by PVT and fluid component：oil reservoir，
volatile oil reservoir and condensate reservoir. By analyzing production performances of mass wells，seismic data as well as
testing data and discussing the distribution of fluids，faults and reservoir，oil/gas distribution difference and its main dominating
factors were revealed. The weathered crust unconformity developed in the top of O1l3 controlled the reservoir depth and reservoir
thickness vertically；the reservoir horizontal inhomogeneity is the important reason for the differential oil/gas distribution.
The strike-slip faults as migration pathway have obvious reformation to reservoir，which decides the gas cutting intensity of
different fossil reservoirs in late Himalayan and the different phase reservoirs distribution，and this is the immediate cause for
the multiple reservoir types and the complicated fluid characteristics in this area.

Key words: oil/gas distribution, main controlling factors, marine carbonate, Ordovician, Tazhong northern slope

Zhang Baotao1，2，3, Yu Bingsong3, Su Jin2, Yu Hongfeng4, Wang Xiangwei1，3. Differential Hydrocarbon Distribution and Its Main Controlling
Factors of Plat Area in Western Tazhong[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2012.08.30.09.

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