莱州湾凹陷馆陶组辫状河储层沉积特征
Sedimentary characteristics of braided channel reservoirs of Guantao Formation in Laizhouwan Sag
吕世聪 1张汶 1蔡越钎 1周连德 1孙风涛1
作者信息
- 1. 中海石油(中国)有限公司天津分公司,天津塘沽 300459
- 折叠
摘要
新近系馆陶组辫状河沉积具有较好的储集性能,是莱州湾凹陷重要的油气储层.国内外学者对于典型的辫状河沉积模式和储层特征进行了大量的研究,但针对砂泥岩不等厚互层的非典型辫状河沉积特征研究较少.文中针对渤海湾盆地南部莱州湾凹陷A油田馆陶组辫状河沉积特征及储层展布,开展了岩心观察、薄片鉴定、测井分析、压汞测试等研究,并在沉积模式研究的基础上结合地震技术手段对辫状河心滩砂体的平面展布进行了综合分析.研究表明:①研究区馆陶组发育远源砂质辫状河沉积;②储层类型主要包括心滩和辫流河道2 种类型,其中心滩储层为优质储层,粒度粗,厚度大,物性好,具有高电阻率、高孔隙度、高渗透率、含油饱和度高、低泥质含量的"四高一低"特点;③结合地震属性研究,心滩储层平面展布范围广,是研究区开发的优势区域.该研究成果可为远源砂质辫状河储层评价及开发井位部署、剩余油分布研究提供借鉴作用.
Abstract
The braided channel deposits of Neogene Guantao Formation has good reservoir performance and are important reservoirs in Bohai Bay Sag.Scholars at home and abroad have done a lot of research on the typical braided channel sedimentary model and reservoir characteristics,but there are few studies on the a-typical braided channel sedimentary characteristics of sand and mud stone with different thickness.Accord-ing to the sedimentary characteristics and reservoir distribution of the braided channel in Guantao Formation,Laizhouwan Sag,southern Bohai Bay Basin,the studies on core observation,thin section identification,well logging analysis,mercury injection testing are carried out.Based on the study of sedimentary models and seismic techniques,the planar distribution of sandy bodies in braided midstream bars is analyzed.The research shows that:(1)Guantao Formation in the study area developed distal sandy braided channel de-posits.(2)Reservoir types mainly include two types:channel bar and braided channel.The channel bar reservoir is a high-quality reservoir with coarse grain size,large thickness,and good physical properties,characterized by high resistivity,high porosity and permeability,high oil saturation,and low shale content.(3)Combined with seismic attribute research,the channel bar reservoir has a wide plane distribution range and is an advantageous area for development.The results can provide a good reference for distal sandy brai-ded channel reservoir evaluation,the deployment of development well location and remaining oil distribution.
关键词
辫状河沉积/心滩/辫流河道/沉积模式/储层评价Key words
braided river deposits/channel bar/braided channel/sedimentary model/reservoir evaluation引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据