非洲南部某深水区沉积特征分析  

Analysis of Deepwater Sedimentary Characteristics,Southern Africa

作　　者：马立武[1] 于水[1] 陶维祥[1] 王颖[1] 胡滨[1] 刘喜玲[1] 

机构地区：[1]中海石油(中国)有限公司北京研究中心,北京100027

出　　处：《天然气地球科学》2008年第4期499-502,共4页Natural Gas Geoscience

摘　　要：非洲南部某深水区主要目的层段为中—上中新统碎屑岩沉积,推测古水深约为2 000 m,为典型的深水沉积,主要发育朵体和水道2类储集砂体,其中朵体在井上表现为厚层块状砂岩,平面上呈朵状展布,而水道在井上则表现为薄的砂泥岩互层,平面上呈不同弯曲度的线状展布。近年来在该地区所发现的油气均主要分布于这2类储集砂体之中,这2类储集砂体是最主要的油气富集及勘探目的层段,指出研究区为高孔、高渗储集层,物性较好,而且朵体物性好于水道。The middle to upper Miocene clastic sediments are the main objective intervals in the study area, and the depth of water is estimated about 2,000 meters. The study area is atypical deepwater sedimentary area, and mainly develops lobe and channel reservoirs. The lobe reservoir presents thick massive sandstone in the well and lobation on plane, but the channel reservoir shows thin interbeds of sandstone and mud- stone in the well and meandering lineation on plane. The oil and gas discovered in recent years are mainly distributed in these two reservoirs around the study area, and the two reservoirs are the main oil--and gas--rich area and exploration interval. They are high porosity and permeability reservoirs, have better physical properties, and the physical properties of lobes is better than that of channels in the study area.

关 键 词：深水沉积 油气 朵体 水道 勘探 

分 类 号：TE122.2[石油与天然气工程—油气勘探]