鄂西—渝东早寒武世裂陷槽的发现及其演化过程初探
Discovery of an early Cambrian aulacogen from western Hubei to eastern Chongqing,and a preliminary study of its evolution
周刚 1李忠权 2张本健 1龙伟 3陈骁 1黄梓桑 2钟原 1和源 1喻黎明 2乔艳萍1
作者信息
- 1. 中国石油西南油气田分公司勘探开发研究院,成都 610041
- 2. 成都理工大学地球与行星科学学院,成都 610059
- 3. 成都理工大学环境与土木工程学院,成都 610059
- 折叠
摘要
根据地震剖面、航磁资料、钻井资料和野外露头,在四川盆地东部发现了鄂西—渝东裂陷槽,初步界定了裂陷槽的西边界,并对其演化过程及形成机制进行了简要论证.在筇竹寺时期裂陷槽呈北东向展布,其西边界介于焦石1井—利1井一线,东边界介于宜地4井—宜地3井一线.之后,在沧浪铺期经过填平补齐,裂陷槽厚度范围明显缩小,且沉降中心由长生1井向北东方的鄂参1井迁移.另外,龙王庙组整体厚度变化不大,表明筇竹寺组和沧浪铺组沉积时期是裂陷槽主要的填平补齐时期.在沧浪铺组沉积时期,裂陷槽于高桥一带发育优质烃源岩;而在相对较浅的双流坝地区发育优质储集岩.
Abstract
According to seismic profiles,aeromagnetic data,drilling data,and field outcrops,an aulacogen from western Hubei to eastern Chongqing has been found,which is located in the eastern part of Sichuan Basin.In this work,we define the western boundary of the aulacogen,and demonstrate its evolutionary process and formation mechanism in detail.During sedimentation of the Qiongzhusi Formation,the aulacogen was distributed along the northeast direction,with its western boundary located between the Jiaoshi 1 well and Li 1 well,and its eastern boundary lay between the Yidi 4 well and Yidi 3 well.During the sedimentary period of the Canglangpu Formation,after filling and leveling,the thickness range of the aulacogen significantly reduced,and the subsidence center moved from the Changsheng 1 well to the Ecan 1 well in the northeast.During the sedimentary period of the Longwangmiao Formation,the thickness of the stratum changed very little,indicating that the sedimentary period of the Qiongzhusi Formation and Canglangpu Formation mainly consisted of filling and leveling of the aulacogen.During the sedimentary period of the Canglangpu Formation,high-quality source rock developed in the Gaoqiao area of the aulacogen.In the relatively shallow Shuangliuba area,high-quality reservoir rocks developed.
关键词
四川盆地/鄂西—渝东裂陷槽/演化过程/成因机制Key words
Sichuan Basin/western Hubei-eastern Chongqing aulacogen/evolution process/genetic mechanism引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据