论文部分内容阅读
轮南地区是一个具有多个含油气层系共存的大型古隆起,目前该区已落实三级油气储量近20亿吨.在奥陶系、石炭系、三叠系和侏罗系发现8套含油气层系,表现出大型复式油气聚集区的特征.奥陶系是主力储集层系,已探明石油地质储量超过8亿吨,形成了特大型海相碳酸盐岩油气田.轮南古潜山碳酸盐岩储层的储集空间分为溶洞、溶孔、裂缝3种类型,其中溶洞分布普遍;储层的发育主要受岩溶作用和构造破裂作用的控制.轮南地区奥陶系、石炭系、三叠系和侏罗系油气藏原油的地球化学特征相近,具有相同的来源,主要来源于中上奥陶统;石炭系、三叠系、侏罗系油气藏主要是奥陶系油气藏在多期次构造运动与调整改造过程中由断层垂向运移作用形成的次生油气藏.轮南复式油气聚集区由于三面紧邻大型生烃凹陷,而且油气长期充足供给,同时继承性古隆起既是烃类长期运移聚集区,也有利于形成多套优质储层及断裂系统的发育,从而保证了轮南巨型复式油气聚集区的形成.
The Lunnan area is a large paleohigh with several hydrocarbon-bearing strata coexisting, and currently has a tertiary oil and gas reserve of nearly 2 billion tons in the area.8 sets were found in Ordovician, Carboniferous, Triassic and Jurassic Including oil and gas reservoirs, showing the characteristics of large-scale oil and gas accumulation zones. The Ordovician is the main reservoir system and has proven reserves of over 800 million tons of oil and has formed extra-large marine carbonate oil and gas fields. The reservoir space of the buried hill carbonate reservoirs is divided into three types of cave, dissolved pores and fractures, in which the distribution of karst caves is widespread.The development of the reservoir is mainly controlled by karstification and tectonic rupture.The Ordovician The geochemistry characteristics of the Carboniferous, Triassic and Jurassic reservoirs are similar and have the same source, mainly derived from the Middle-Upper Ordovician. The Carboniferous, Triassic and Jurassic reservoirs are mainly Austrian The Tao-petroliferous reservoirs are secondary reservoirs formed by the vertical migration of faults during multi-stage tectonic movement and adjustment and reconstruction.As the Lunnan compound oil and gas accumulation area is close to the large hydrocarbon generating depressions on three sides and the oil and gas supply is sufficient for a long time, Inherited palaeo-up is both hydrocarbon long Migration and accumulation area, but also conducive to the formation of multiple sets of high quality reservoir development and fracture system, thus ensuring the formation of the southern giant wheel double oil and gas accumulation zone.