Pelagian盆地C区块灰岩储层的地震识别  

Seismic Identification of Limestone Reservoir in Block C of Pelagian Basin

作　　者：贾义蓉[1,2] 王天奇[2] 窦玉坛[2] 房乃珍[2] 李娟[2] 

机构地区：[1]成都理工大学信息工程学院,四川成都610059 [2]中国石油勘探开发研究院西北分院,甘肃兰州730020

出　　处：《天然气地球科学》2013年第1期150-155,共6页Natural Gas Geoscience

摘　　要：北非Pelagian盆地是中、新生代含油气盆地,自侏罗系Jerba组到中新统Tazerka组均有储层发育,但下始新统顶部的货币虫滩坝灰岩是主力储集层,利比亚海上已发现储量的80%分布在货币虫灰岩储层中。Pelagian盆地C区块在构造高部位钻井2口,均因货币虫灰岩段的缺失而失利。通过正演、反演及地震多属性提取等技术手段,结合地质、钻井、测井、沉积古地貌等信息对下始新统Metlaoui群El Garia组货币虫灰岩进行了识别与预测。Pelagian basin in North Africa is one of Meso-Cenozoic oil-gas bearing basins, which developed reservoir form Jurassic Jerba Group to Miocene Tazerka Group, but the lower Eocene Nummulite limestone is the main reservoir. From now on the oil discoveries of nummulitic limestone in Libya have been about 80%of the total reserves. It had been trilled two failed wells in the high part of the structure because of the lack of nummulitic limestone. Based on the method of forward model,inversion and seismic attribute extraction,the limestone reservoirs of the Metlaoui Group is identified in this paper. The distribution of possible nummulitic limestone reservoir rocks is also predicted in this paper, combined with the study of ge- ology, paleogeomorphic, drilling and logging data.

关 键 词：Pelagian盆地 C区块 货币虫灰岩 地震响应 

分 类 号：TE132.1[石油与天然气工程—油气勘探]