摘要
本文根据四川盆地内五条区域大剖面丰富的地震信息,应用厂域地震地层学的方法技术,建立了四川盆地从海相地层到陆相地层一整套地震层序序列,发现海相碳酸盐岩地层中有利于油气聚集的几种圈闭类型。根据现有的地震资料,对川西拗陷上三叠统地层进行地震地层学研究。通过地震层序的分析,确定了七个沉积间断面,建立了晚三叠世沉积盆地的地震层序,并划分了地震相。根据地震参数的地质意义,进行沉积环境解释,并建立了沉积体系,进而分析了区域地质特征和盆地沉积发展只。结合沉积盆地的石油地质条件,进行了油气远景评价,为含油气盆地非构造圈闭的勘探提供了重要线索。
On the basis of a wealth of seismic information of the 5 major regional profiles in Sichuan Basin and by using the seismic stratigraphical method and technology, a complete set of seismic sequences (from marine to continental formations) of Sichuan Basin has been established and a couple of traps good for hydrocarbon accumulation are found in the marine carbonate formation.In the light of the existing seismic data, research on the Neotriassic series formation of west Sichuan Depression is made using seismic stratigraphy. From the seismic sequence analysis made, 7 depositional discontinuities are defined, the seismic sequence of Neotriassic sedimentary basin is set up and the division of seismic phase is made according to the geological sense of seismic parameters, interpretation of the depositional environment is done. And the depositional system is established. Moreover, the regional geologic features and case history of the development of the basin deposition are examined. Integrated with the petroleum geological conditi ons of the depositional basin, an assessment of hydrocarbon prospect is made. Also, the important leads for nontectonic trap exploration for oil/gas bearing basin is provided.
出处
《石油物探》
EI
1987年第4期16-29,共14页
Geophysical Prospecting For Petroleum
