我国南方王村上寒武统大型古油藏的首次发现

通过对我国南方扬子地区野外石油地质考察，首次在上寒武统追屯组中发现王村大型古油藏。该古油藏位于江南雪峰隆起西北缘，呈北东向展布；油藏分布面积约100 km²，沥青富集厚度约60 m，且在追屯组顶部发育2层累计厚度达15.6 m左右的砂糖状油浸白云岩。沥青产状多以网状、浸染状、晶间孔型、溶洞型、裂缝型赋存；储层岩性为浅滩相的结晶白云岩、白云质灰岩与古岩溶角砾状白云岩。根据断层带内捕获的含沥青角砾和与断面平行的含沥青白云质灰岩透镜体等现象，表明该古油藏后期遭受了强烈的构造破坏，形成现今残余古油藏。

First Discovery of a Destroyed Large Upper Cambrian Oil Pool in Wangcun Town, South China

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. .