地震分频属性在沉积相分析中的应用研究

Application study on seismic frequency-division attribute in sedimentary facies analysis

针对沉积相分析中储层复杂化及地震资料分辨率等因素的影响,使沉积相研究有一些难度,造成储层预测结果存在多解性,并且存在薄层难以识别的问题。运用地震分频处理技术,提取马北油田某区块地震分频属性。在此基础上,分析该区域沉积规律、识别沉积体及物源方向,研究储层横向变化,取得了可信度较高的储层预测结果,明确了研究区为辫状河及三角洲沉积体系。地震分频处理技术可以突破传统地震分辨率的极限,达到对研究区沉积相精细刻画的目的,提高储层预测的精度。经钻井证实,预测成果与实际情况吻合度较高。

Due to the influence of reservoir complexity, the resolution of seismic data and other factors, the study of sedimentary facies have some difficulties,for else,the reservoir prediction results have multiple solutions,maybe the thin layers will be difficult to identify. By adopting seismic frequency treatment technology, Seismic frequency division attribute of a region of Mabei oilfield was extracted. Mo-reover, reservoir prediction results with high accuracy were obtained by analysing the regional sedimentary laws, identifying sedimentary bodies and the source direction,and studying the lateral variation of reservoir,finally,the researched region was determined as braided river and Delta sedimentary system. Seismic frequency treatment technology can overcome the diffculties exist in traditonal seismic reso-lution, and can predict the sedimentary facies more accurately, improve the degree of preciseness for reservoir prediction. The prediction results are confirmed by drilling, which are in accordance to actual conditions.