【摘要】 地震沉积学是当今国际沉积学研究热点,在薄层砂体勘探开发中已发挥了重要作用。本文根据地震沉积学的基本原理和陆相沉积盆地的研究实践,提出了适合中国陆相沉积盆地薄层砂体识别预测的地震沉积学研究流程,即在高频层序地层格架中,通过90度相位转换、分频处理、优选属性并开展地层切片、岩心刻度地层属性切片、识别薄层砂体、确定沉积体系类型和演化、预测岩性圈闭等工作。同时,以黄骅坳陷歧口凹陷沙河街组沉积体系和砂体预测为研究实例,开展地震沉积学研究,明确了沙河街组沙一段三角洲沉积体系及其演化,预测了有利岩性油气圈闭勘探地区。更多还原

【Abstract】 Seismic sedimentology has aroused much attention among geologies both in China and abroad in that it plays an important role in the exploration and production of thin reservoirs. According to the theory of seismic sedimentology and practices in continental basins, this paper puts forward a program of seismic sedimentology suitable for China’s continental basins with lots of thin sand bodies: first, the high resolution sequence framework is built up and seismic data are converted to 90°phase, then seismic processing within different frequencies and stratal slicing with different seismic attributes were conducted, lithologies in cores are correlated with stratal slicing, thin sand bodies are determined in plane with seismic geomorphology so as to define depositional systems and their evolutions, and lastly, the favorable lithological traps are predicted. With the Shahejie Formation of Qikou depression as the studied object of seismic sedimentology, the authors determined the distribution of delta of Shahejie Formation in Qikou depression and forecasted the regions of beneficial lithologic traps.更多还原