摘要
野外露头和A井钻探表明,思茅坳陷二叠系烃源岩、碳酸盐岩和碎屑岩储层较发育,保存条件是本区油气成藏的关键。通过盖层、构造、岩浆、地下水、地表油气显示等分析,本区发育侏罗系-白垩系、龙潭组两套区域性泥岩盖层,盖层条件好,膏岩局部分布,但构造活动强烈,发育通天断裂,地表水下渗深度大,火山活动强烈、局部发现热变质现象,地表油气显示丰富,综合分析认为思茅坳陷保存条件较差,局部保存条件较好的区域为下步勘探工作重点。
The field outcrop investigation and drilling of No.A well show that the Permian source rock of Longtan Formation and carbonate rock and clastic rock reservoirs are well developed in the Simao depression.Based on the analysis of cap rock,structure,magma,groundwater,oil and gas of covershows,the Jurassic-Cretaceous Formation and Longtan Formationwith two sets of regional mudstone caprock are well developed,with good cover conditions,gypsum rocks are distributed locally,but tectonic activity is strong,with fracture,hot spring water infiltration depth is big,strong volcanic activities,resulted in local thermal metamorphism.The surface oil and gas are abundant.comprehensive analysis shows that the preservation condition of Simao depression is poor,but those local areas with better preservation conditions are the next target exploration area.
作者
陈超
郑海
韦宝东
黄开创
CHEN Chao;ZHENG Hai;WEI Bao-dong;HUANG Kai-chuang(Research Institute of Exploration and Development,Southwest Oil and Gas Company,SINOPEC,Chengdu 610041,China)
出处
《四川地质学报》
2022年第3期419-424,共6页
Acta Geologica Sichuan
关键词
思茅坳陷
盖层
构造活动
保存条件
Simao depression
Structure activity of cap rock
Preservation conditions
