深水断陷盆地层序地层分析

ANALYSIS OF SEQUENCE STRATIGRAPHY IN DEEP WATER RIFT BASIN

在充分认识盆地构造、沉积发育史的基础上，针对断陷盆地地震资料品质差、无（少）钻井资料、断层复杂、高温高压造成地层破碎导致层序界面不显等困难，提出井震结合相互验证标定层序划分的思路。运用Vail经典的层序地层学理论进行精细划分。然后，分别从地震、单井及井震结合层序地层分析方面介绍了深水断陷盆地层序地层学分析的方法和技术，实例证明，该思路和方法切实可行，可以建立深水区断陷盆地精细三维等时层序地层格架。

Based on understanding of basin structure and sedimentary development history in studied area with the difficulties including poor quality of stratigraphic seismic data, no or little well data, complicated faults and indistinct sequence boundary caused by formation broken due to high temperature and pressure, this paper proposes that combination of well and seismic data should be applied in rift basin in deep water area and fine division of sequence stratigraphy should be implemented by using classical sequence stratigraphy of Vail method. Analytic method of sequence stratigraphy in deep water rift basin is introduced through seismic, single well and combination of well and seismic data of sequence stratigraphy, respectively. This paper also points out the differential characteristics of sequence boundary and thickness in the center and at the edge, and analyzes the cause. Practice proves that this method is workable, which can be used for establishing fine 3D equitime framework of sequence stratigraphy in rift basin in deep water area.