摘要：

本文在分析断陷湖盆陡坡带不同构造部位的可容空间变化规律及其沉积响应特征的基础上，探讨了断陷湖盆陡坡带参照井选取的可容空间机理，并阐明了参照井的选择原则；根据参照井处的沉积相迁移特征及体系域叠置样式，建立了在参照井的背景下，Ⅰ型与Ⅱ型陆相层序划分及其层序界面判识的标准，以及低水位体系域（LST）、水进体系域（TST）、高水位体系域（HST）及水退体系域（RST）的识别模式。本文以泌阳断陷双河～赵凹地区下第三系核三上段为例，采用泌207井为参照井，对研究区目的层段开展了断陷湖盆陡坡带陆相层序地层学的尝试性研究，并编制了研究区目的层段的陆相层序地层等时框架模式。研究结果表明，采用选取参照井的办法，可以有效地解决断陷湖盆陡坡带陆相层序地层分析中的“沉积滨线坡折”问题。

Abstract:

Based on analyses of the sedimentation-responsed charateristics to the accommodation variation law at different structural positions of the steep slope zone in fault-depressed lacustrine basin, accommodation mechanics to select reference well has been discussed; and the principle for selecting reference well has been put forward. According to the facies migration character and systems tract superimposed style in reference well, the standards for identifying two types of terrigenous sequence (type Ⅰand Ⅱ) and the models of their systems tract in a terrigenous sequence have been established under the background of reference well. In this paper, the upper member of Eh3 in Shuanghe～Zhao'ao area, Biyang fault-depression, is treated as a case to study terrigenous sequence stratigraphy by using well B207 as reference well. This result shows that it can effectively resolved the problem about depositional shoreline break for terrigenous sequence in the steep slope zone of fault-depressed lacustrine basin by using reference well.