摘要
以准噶尔盆地西北缘某区克下组储层为例,在砾岩储层岩心观察、岩心采样数据测试等粒度发育基本特征分析的基础上,详细介绍了粒度分析在沉积环境判别中的应用。研究区目的层以粒径大于2 mm的粗碎屑为主,主要为中砂岩、砂质砾岩及细砾岩。体现出冲积扇砾岩储层以粗粒沉积为主的特点。储层总体上粒度分布范围较宽,表现出典型的冲积扇砾岩储层分选性差的基本特征。粒度概率曲线上以较粗粒的滚动搬运组分和跳跃搬运组分为主,而细粒的悬浮搬运组分很少。C-M图和结构参数散点图证实目的层以牵引流为主,且自下而上特点逐渐显著。
Taking the alluvial fan reservoir in the lower member of Kelamayi Formation in the studied area as an example,the grain-size analysis is used for the identification of sedimentary environment of conglomerate reservoir based on the grain-size development characteristics obtained by core observation and core measuring data.The objective reservoir in the studied area is mainly composed of coarse clastic whose grain diameter is more than 2 mm,and the coarse clastic is mainly medium grain-size sandstone,sandy conglomerate and fine conglomerate,which reflects that alluvial fan conglomerate reservoir is mainly coarse deposition.On the whole,the grain-size distribution range of the alluvial fan conglomerate reservoir is wide,which reflects the basic characteristic of typical alluvial fan conglomerate reservoir that sorting is bad.Grain-size probability curve reflects that coarse rolling transport component and jumping transport component are most,and fine suspension transport component is a little.C-M map and structural parameter scatter diagram show that the objective reservoir is mainly traction current,whose features gradually become significant from bottom to top.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2014年第6期6-12,34,共8页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家科技重大专项"CO2驱油与埋存关键技术"(编号:2011ZX05016-006)
关键词
粒度分析
砾岩储层
沉积环境
三叠系
准噶尔盆地西北缘
grain-size analysis
conglomerate reservoir
sedimentary environment
Triassic
northwest margin of Zhunger Basin
