综合应用模型正演及地震瞬时属性预测薄层展布——以平湖油气田某薄层油藏为例

Forecasting thin bed distribution through application of forward modeling and seismic instantaneous attributes:taking Fb thin bed oil reservoir of Pinghu Oilfield as an example

张尚虎

ZHANG Shanghu

中国石油化工股份有限公司上海海洋油气分公司研究院, 上海 200120

Institute of SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China

应用地震储层预测技术检测薄层一直是地震技术中的难题之一,薄层展布能否检测受很多因素影响。以平湖油气田某薄层油藏为例,应用模型正演及与实际地震反射特征对比的方法研究了该薄层油藏地震响应特征,应用地震瞬时属性预测了薄层平面展布。结合沉积背景及单井相分析认为,该薄层为小型河流三角洲沉积体系,沉积相带分布清楚。预测结果与实钻结果吻合良好,为油藏经济有效开发奠定了基础。

Thin bed distribution detecting through application of seismic reservoir forecast technique is difficult in seismic exploration. Detection of thin bed distribution is affected by many factors and specific questions which should be solved by specific analysis. In this paper, Fb thin bed oil reservoir of Pinghu oilfield was taken as an example through using forward modeling and seismic instantaneous attributes to detect the distribution of thin bed. For Fb oil reservoir, the characteristics of seismic response of forward modeling was studied and compared with the actual reflection characteristics, and seismic instantaneous attributes was used to forecast the distribution of the thin bed. Based on this, sedimentary background and single well phase characteristics were combined with the abnormities of seismic instantaneous attributes, which indicates that Fb is a small river-delta sedimentary system and the distribution of sedimentary facies are obviously recognized. The forecast results are consistent with the actual drilling results, which is the basis for economic development of Fb.

https://doi.org/10.3969/j.issn.1008-2336.2011.02.047