Palaeogeomorphology Unit Pattern of Qikou Sag in the - 汉斯出版社.PDF

Advances in Geosciences 地球科学前沿, 2015, 5, 22-26 Published Online February 2015 in Hans. /journal/ag /10.12677/ag.2015.51003 Palaeogeomorphology Unit Pattern of Qikou Sag in the First Member of Shahejie Xianbao Chen Exploration and Development Research Institute of Dagang Oilfield, Tianjin Email: chencxb@163.com th nd th Received: Feb. 9 , 2015; accepted: Feb. 22 , 2015; published: Feb. 28 , 2015 Copyright © 2015 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract Qikou sag is one of the most important fuel-rich sags in Bohai bay basin. A large number of paleo- geosyncline, paleoslop break and other geomorphic units in different forms and for different causes are developed in the first member of Shahejie in Qikou sag. They copule with each other, construct different provenance supplement systems, and restrict sedimentary sequence’s location, dimensions, internal composition and packing style. The study on these combination patterns is necessary. We recognize four palaeogeomorphology unit patterns of Qikou sag in the first member of Shahejie: uplift-gentle slope, more fault zone, paleoslop break-sag combination pattern, sag- large break groove-sag combination pattern, heave-fracture groove-drop-off paleoslop break-sag combination pattern and under-water lower uplift-biological reef flat combination pattern. Keywords Qikou Sag, Palaeogeomorphology, Sandbody, Controlling Action 岐口凹陷沙一段古地貌单元组合样式 陈宪保 大港油田勘探开发研究院，天津 Email: chencxb@163.com 收稿日期：2015年2月9 日；录用日期：2015年2月22 日；发布日期：2015年2月28 日 22