摘要
黔南坳陷典型古油气藏的精细解剖对南方海相油气勘探有借鉴意义。本文利用沉积、有机岩石学和地球化学等综合手段,建立了黔南坳陷麻江古油藏、凯里残余油气藏地区和雪峰隆起西缘的二叠系-震旦系地球化学综合剖面,重点探讨了该地区优质烃源岩的生烃潜力和时空分布。黔东南地区,纵向自震旦系至二叠系均有烃源岩发育,其中早寒武世初期和二叠纪发育有两套优质烃源岩,以下寒武统盆地相、斜坡相的黑色页岩发育最好,有机质丰度高(TOC普遍大于2%),类型好(偏腐殖型),厚度大,是气候变暖、海平面上升和生物大爆发等全球性重大地质事件的耦合作用下,由热液活动、上升洋流等共同引起的高古生产力和缺氧环境控制的产物,是本地区大中型油气田形成的主要物质基础。二叠纪盆地相和泻湖相中发育的优质烃源岩对黔中隆起及其周缘地区油气成藏也具有重要作用。
The Central Guizhou Uplift and its adjacent areas are a frontier of marine oil and gas exploration. The study of Majiang paleo-oil pool and Kaili residual oil pool have special reference to the exploration. The typical compositive geochemical profile of Sinian-Permian in the Kaili-Majiang area, in this study, were founded using organic geochemistry, organic petrology and sedimentology methods. It is showed that the marine excellent source rocks were developed in the Early Cambrian, and Early Permian. Both Majiang paleo-oil pool and Kaili residual oil pool were mainly supplied by the excellent source rock of Lower Cambrian rich in organic （TOC〉2%）, Ⅰ -- Ⅱ type, thick and extensive. The excellent source rocks of Early Permian have genetic relationship to the bitumens in its adjacent reservoirs, which play an important role in major oil and gas accumulation in the central Guizhou uplift and its adjacent areas.
出处
《地质学报》
EI
CAS
CSCD
北大核心
2008年第3期366-372,共7页
Acta Geologica Sinica
基金
国家重点基础研究发展基金规划"973"项目(编号2005CB422102)资助的成果
关键词
黔南坳陷
古油藏
优质烃源岩
生烃潜力
时空分布
southern Guizhou depression
paleo-oil pool
excellent source rock
hydrocarbonpotential
spatio-temporal distribution
