高分辨率层序地层学应用中的问题探析

Discussion on problems of applying high resolution sequence stratigraphy

高分辨率层序地层学自诞生以来,由于其基本原理和分析技术的广泛适用性、可行性、高精度和可预测性,得到了广大石油地质工作者的认可并在油气勘探与开发研究中得到了广泛的应用,对中国油气勘探与油田开发挖潜起着至关重要的作用。但在应用过程中,还存在一些对概念理解的偏差以及模糊不清的认识,须要更深入的探讨以加深认识。作者主要从概念和方法上分析探讨了高分辨率层序地层学在储集层规模的地层划分与对比中存在的一些问题,包括基准面旋回与准层序概念的差异性;基准面旋回的级次划分;基准面旋回的界面识别与基准面旋回对比等,旨在通过对这些问题的分析,与运用该理论和方法的学者达成一定的共识并提供一些思考。

High resolution sequence stratigraphy has been accepted by most geologists and widely applied to oil and gas exploration and development since it was introduced into China due to its wide applicability, feasibility, high accuracy and predicability. It has played an important role in oil and gas exploration and development in China. In its application, there still exists some deviation to the concepts of sequence stratigraphy, thus deep discussion needs to be carried out. The author discussed some problems occurring in high resolution sequence stratigraphy application in reservoir-scale, including the differentiation between base-level cycle and paraseqence, the orders of base-level cycles, the identification and correlation of base-level and so on, in order to provide a reflection and acquire a common understanding on the principles and methods of high resolution sequence stratigraphy.