摘要
南堡凹陷为典型的陆相断陷湖盆,凹陷北部老爷庙地区是油气勘探的重要目标区。充分利用南堡凹陷岩心、测井、三维地震等资料,运用层序地层学及沉积学理论,对南堡凹陷老爷庙地区东营组三段沉积特征及其主控因素进行了研究。结果表明,南堡凹陷老爷庙地区东三段为一完整的三级层序,主要发育扇三角洲、湖泊和浊积扇3种沉积体系类型。从低位体系域(LST)到高位体系域(HST),扇体展布范围呈现"大-小-大"的演化特点,扇三角洲沉积中心总体上由东向西迁移;区内构造活动对沉积体系的分布和演化的控制作用显著,同沉积断裂的活动性差异控制了扇体发育的规模和位置,构造坡折带控制着沉积相带纵向分异特征,构造古地貌单元的空间配置控制着沉积微相的规模和形态;在此基础上,在研究区内识别出梳状断裂式、转换带式、滚动背斜式和多级断阶式4种砂体空间分布样式,对该区沉积模式的建立和有利储集相带的预测都具有重要指导意义。
The Nanpu Sag is a typical lacustrine rift basin in Bohai Bay Basin. The studied Laoyemiao area in the north of the depression is an important target area for oil and gas exploration.This paper makes full use of the core, logging and 3 D seismic data of Nanpu Sag, and the theory of sequence stratigraphy and sedimentology to study the sedimentary characteristics and main controlling factors of the third member of Dongying Formation in Laoyemiao area of Nanpu Sag. The results show that the third member of Dongying Formation in the area is a single three-level sequence, with three types of sedimentary systems: fan delta, lake and turbidite fan. From the low-level system domain(LST) to the high-level system domain(HST), the fan-distribution range shows the evolution characteristics of "large-small-large". The fan-delta sedimentary center migrates from east to west in general. The tectonic activities have a significant controlling effect on the distribution and evolution of the sedimentary system. The difference in activity with the syn-depositional faults controls the scale and location of the fan development.The structural slope-break zone controls the longitudinal differentiation of the sedimentary facies.The spatial configuration of the tectonic paleo-geomorphic units controls the scale and shape of the sedimentary microfacies. On this basis, the spatial distribution pattern of sedimentary sand bodies in the area is summarized: conversion belt type, dressing fracture type, multi-level step type and lateral anticline type,which has important significance for the establishment of sedimentary model and prediction of favorable reservoirs.
作者
刘可行
甘华军
陈思
赵忠新
李潇鹏
马江浩
柯友亮
王思洋
巩天浩
张亦康
Liu Kexing;Gan Huajun;Chen Si;Zhao Zhongxin;Li Xiaopeng;Ma Jianghao;Ke Youliang;Wang Siyang;Gong Tianhao;Zhang Yikang(Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education,China University of Geosciences (Wuhan),Wuhan 430074,China;Research Institute of Exploration and Development,Jidong Oilfield Company,PetroChina,Tangshan Hebei 063000,China)
出处
《地质科技情报》
CAS
CSCD
北大核心
2019年第3期88-102,共15页
Geological Science and Technology Information
基金
十三五国家科技重大专项"大型油气田及煤层气开发南堡凹陷油气富集规律与增储领域"(2016ZX05006-006-002)
关键词
南堡凹陷
东营组
同沉积断裂
沉积体系
控制因素
Nanpu Sag
Dongying Formation
syn-depositional fault
sedimentary system
controlling factor
