江汉盆地广北油田潜3^4油藏特征描述

Reservoir Description of Qian 3￣4 Pool in Jianghan Basin

通过对潜江凹陷沉积和构造背景的分析，论述了广北油田潜３４油藏的成生关系及控制因素。该油藏储层由一套深水沉积的、呈叠瓦状以指状形式尖灭于泥岩中的下切河道砂体组成，其圈闭条件受岩性和构造双重控制。根据地震资料解释，结合关键井的资料分析，对潜３４油藏的几何形态、圈闭机制、岩性和物性特征进行了描述。在参数模型研究的基础上，采用双孔隙度反演和油藏模式识别技术对储层分布和油藏特征进行了进一步的描述和分析。

evelopment and control of Qian 3￣4 pool of Guangbei oilfield in Jianghan basin are discussed by analysis of the depositional and structural settings of Qianjiang depression of the basin. Then, the geometry, trappings, lithologic and petrophysical characteristics of Qian 3￣4 pool are described based on seismic interpretation combined with key well data analysis. It is suggested that this reservoir be resulted from the specific geologic environment having reached better organic conditions, and it consists of a set of imbricated incised channel sandstones that deposited in deep water and pinched finger-likely in shale, and its trapping is dominated by both the lithology and the structure. The reservoir distribution and its features are demonstrated by seismic dual porosity inversion and reservoir pattern recognition based on modeling analysis.