收稿日期: 2009-02-05
修回日期: 2009-03-23
网络出版日期: 2009-04-10
基金资助
国家自然科学基金项目(编号:40802028);国家重点基础研究发展规划项目(编号:2005CB422108)联合资助.
First Discovery of a Destroyed Large Upper Cambrian Oil Pool in Wangcun Town, South China
Received date: 2009-02-05
Revised date: 2009-03-23
Online published: 2009-04-10
金之钧 周雁 . 我国南方王村上寒武统大型古油藏的首次发现[J]. 天然气地球科学, 2009 , 20(2) : 159 -161 . DOI: 10.11764/j.issn.1672-1926.2009.02.159
During the field investigation of petroleum geology in the upper and middle Yangtz area of South China, a destroyed oil pool in the Upper Cambrian was firstly discovered in the Wangcun town. The oil pool with the NS extension is located in the northwestern part of the Jiangnanxuefeng Uplift, with an area of more than 100 km2. The thickness of bitumen-enriched layers is about 60 m, where two layers of the saccharoidal dolomites of more than 15.6 m thick are filled by oil at the top of Upper Cambrian Zhuitun Formation. The bitumen occurs as reticulates, impregnation, intercrystalline pores, dissolved caverns and fissures. The reservoir lithologies are shallow facies crystalline dolomites, dolomitic limestone, and paleokarst dolomite breccia. Bitumen-bearing breccia trapped in fault zones and dolomitic limestone lens paralleling to the fault plane reveal that the oil pool suffered from strong structural destroy at later time, forming the present residual body.
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Key words: Wangcun oil pool; Upper Cambrian; Bitumen; Dolomite
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