A comparison of hydrocarbon accumulation characteristics of the Paleozoic marine carbonates in Tarim Basin and Williston Basin

被引：0

作者：

机构：

[1] Basin and Reservoir Research Center, China University of Petroleum

[2] State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum

来源：

Tao, C. (taocz99@163.com) | 2013年 / Use me卷 / 34期

关键词：

Hydrocarbon accumulation characteristics; Marine carbonate rock; Paleozoic; Tarim Basin; Williston Basin;

D O I：

10.11743/ogg20130402

中图分类号：

学科分类号：

摘要：

The Paleozoic marine carbonates are the main exploration targets in both Tarim and Williston basins. Based on a comparative analysis of both tectonic-depositional setting and conditions for the formation of hydrocarbon accumulations, this paper discusses the similarities and differences of hydrocarbon accumulation in the Paleozoic marine carbonates of the two basins. Williston Basin locates within the large North America Plate with relatively stable tectonic setting. The sedimentation within the basin was mainly controlled by eustasy. In contrast, Tarim Basin locates in the much smaller Tarim Plate and experienced frequent and intensive structural deformations. As a result, the sedimentation within the basin was mainly controlled by the tectonic movements. Williston Basin has high-TOC effective source rocks, good porous-type reservoirs and evaporite cap rocks, while Tarim Basin has high-mature to overmature source rocks, karst and dolomite reservoirs, and mudstone and evaporite cap rocks. Different kinds of traps are developed on the paleo-highs in both basins, which constitute the main carbonate play fairways. Williston Basin has multiple evaporite sequences, which makes it possible to effectively apply the petroleum system concept to the basin. In comparison, the hydrocarbon accumulation system concept can provide effective guidance for the hydrocarbon exploration in basins such as Tarim Basin featuring in multiple source rocks, multiple kitchens and multiple episodes of hydrocarbon charging. The favorable reservoir-seal assemblage in Williston Basin is dolomite reservoir and evaporite seal. The comparative analyses indicate that the favorable carbonate play fairways are the areas with the assemblage of the Lower-Middle Cambrian dolomite reservoirs and the Middle Cambrian evaporite seals in the Bachu and Tazhong areas.

引用

页码：431 / 440

页数：9

共 36 条

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