Control of the structure of the Paleogene Dongying Formation upon fan-delta deposition in the Nanpu Depression,Jidong oilfield

Liu Yanli; Qiu Chunguang; Deng Hongwen; Li Ming

doi:10.11743/ogg20080115

Views : 0 下载量: 440 CSCD: 0

Export
Share
Collection
Album

Control of the structure of the Paleogene Dongying Formation upon fan-delta deposition in the Nanpu Depression,Jidong oilfield
Vol. 29, Issue 1, Pages: 95-101(2008)
Online First：24 February 2008，

Published：2008
DOI： 10.11743/ogg20080115
稿件说明：

移动端阅览

DOI：

Liu Yanli, Qiu Chunguang, Deng Hongwen, et al. Control of the structure of the Paleogene Dongying Formation upon fan-delta deposition in the Nanpu Depression,Jidong oilfield[J]. 2008, 29(1): 95-101. DOI： 10.11743/ogg20080115.

摘要

根据边界断裂特点和东营组地层发育特征

南堡凹陷划分为陡坡带、凹陷带和缓坡带3个构造地貌单元.钻测井和地震资料研究表明

陡坡带主要发育扇三角洲沉积体系

受制于古构造-古地貌背景的不同

储层粒度、发育规模等方面存在明显差异.可进一步划分出断-台、断-阶和断-崖3类扇三角洲成因模式

3种模式形成的扇三角洲沉积体系在油气储集能力方面的差异性较大.其中

断-台地貌形成的扇三角洲平原亚相和扇三角洲前缘亚相、断-阶地貌形成的扇三角洲前缘亚相是形成优质储层的有利相带.

Abstract

Boundary fault features and deposition characteristics of the Dongying Formation support a division of the Nanpu depression into three structural units

namely the steep slope zone

the depressed zone

and the gentle slope zone.The analysis of drilling

log and seismic data points out that fan-deltaic depositional systems are mainly developed in the steep slope zone and are controlled by different paleo-structures and paleogeomorphology

thus showing clear disparity in grain size of reservoir rock and development scales.Based on these observations

the paper sums up three fan deltaic genetic models

including fault-platform

fault-terrace

and fault-scarp.They differ tremendously in reservoir capacity.The delta plain subfacies and fan delta front subfacies developed in the fault-platform setting and the fan delta front subfacies developed in fault-terrace setting are considered as the favourable facies belt for forming high quality reservoirs.