石油与天然气地质 ›› 1985, Vol. 6 ›› Issue (2): 221-225.doi: 10.11743/ogg19850219

• 工作研究 • 上一篇    下一篇

滇黔桂地区油气勘探的效果分析和今后的勘探方向

李尚武   

  1. 滇黔桂石油地质科学研究所
  • 收稿日期:1984-11-20 出版日期:1985-06-25 发布日期:2012-01-16

THE EFFECT ANALYSES AND ASPECTS OF PETROLEUM EXPLORATION IN YUNNAN-GUIZHOU-GUANGXI REGION

Li Shangwu   

  1. Scientific Research Institute of Petroleum Geology, Yunnan-Guizhou-Guangxi Region
  • Received:1984-11-20 Online:1985-06-25 Published:2012-01-16

摘要:

滇黔桂地区有三个找油找气的领域,人们熟知的海相碳酸盐岩发育分布区是其中第一个领域。其大致范围在康滇地轴以东,四川盆地以南,江南古隆起以西,云开至马关古隆起之北。包括滇东、桂中和贵州的大部地区,面积约有44万平方公里。

Abstract:

Yunnan-Guizhou-Guangxi Region,which is covered by 580,000 km2 sedi-mentary rocks,can be divided into three fields in petroleum prospecting.The first being covered continuosly by Palaeozoic carbonate rocks was avast sea basin during Palaeozoic-Early Mesozoic and then became a huge oil-and gas-bearing basin.But it was disintergrated after Indo-China tectonic move-ment.Therefore,the possible oil and gas pools there might be distroied con-siderably.Different source rocks are preserved in structural basins in localparts of the region.High hopes of petroleum prospecting were at first placed onthis field and a lot of exploration work was done.Due to the complexity of geo-logical structures and the difficulties in exploration,the effect is confirmedto be quite disappointing.The second field is the region covered by Mesozoic continental red beds su-perposed on formations of the previous carbonate rocks after its uplift.Nowsome gas fields have been discovered in the region.The exploration effect and petroleum prospects in this field are much better than that in the first field.The third one is small Cenozoic basins superposed on Palaeozoic-Mesozoicstrata separately.Though they are small both in area and scale of oil and gas pools,yet these basins can be explored easily.So the exploration effectis the best among all three.The author suggest that the first field should not be considered at presentas the main target in petroleum prospecting due to the difficulties in explo-ration;the second field should be taken as the main target in recent years ac-cording to its favourable conditions in oil generation and present prospectingmethods;the third field is important in practice.Certain reserves have beenfound in Baise Basin and we are bound to find more small oilfields like Baise type with less investment.