摘要
三道桥工区白垩系储层为辫状河三角洲砂体,具有储层薄、孔隙度低、渗透率低等特点。根据实钻测井资料,选择岩石物理参数,建立符合客观实际的地质模型。利用正演模拟合成地震记录分析,10 m以上厚度的砂体能够分辨。地震属性分析认为,砂体越厚,地震波振幅越强,尤其当砂体含油以后,振幅增强更加明显,因此,可以用振幅属性描述较厚的砂体和预测砂体的含油气性。分频技术可以区分较薄的储层。正演模拟为储层预测提供了依据。
The Cretaceous Sandaoqiao reservoirs are braided river delta sands,characterized by thin,low porosity and low permeability. A practical geological model was set up based on logging data and petrophysical parameters. Forward modeling was conducted to produce synthetic seismogram which can identify sands of more than 10 m thick. Seismic attributes analysis shows that the thicker the sand is,the stronger the seismic amplitude is; especially when the sand is oil-bearing,the seismic amplitude is even stronger. Therefore,amplitude attributes can be used to describe thick sands and to predict oil-gas possibility. Frequency division technology is used to distinguish thin sands. The forward modeling analysis provides basis for reservoir prediction.
出处
《特种油气藏》
CAS
CSCD
北大核心
2013年第5期32-35,152,共4页
Special Oil & Gas Reservoirs
基金
国家重大科技专项"塔里木盆地碎屑岩层系大中型油气田富集规律与勘探方向"(2011ZX05002-003)
关键词
白垩系
正演模拟
储层特征
地震响应
塔里木盆地
三道桥工区
Cretaceous
forward modeling
reservoir characteristics
seismic response
Tarim Basin
Sandaoqiao work area
