地层切片技术应用的局限性——以海拉尔盆地贝尔凹陷砂体识别为例

Application limitation of stratal slicing technique——a case study on sand body identification in Bell Depression of Hailaer Basin.

本文对地层切片技术在复杂断陷盆地砂体预测中的应用进行了讨论,指出切片技术应用的局限性,主要表现为等时切片并非一定是地质沉积界面,属性切片与地震属性的敏感性和稳定性有关。本文在准确研究探区内沉积体系的基础上,精细刻画振幅型和结构异常型沉积体系,并结合三维精细解释结果及三维可视化等技术,在海拉尔盆地贝尔凹陷大磨拐河组河道砂体识别及南屯组扇体识别中,正确应用地层切片技术,分析并发现该区圈闭是以构造—岩性和岩性油气藏为主。根据预测结果部署并钻探H12井,获工业油流。

In this paper the application of stratal slicing technique in complex faulted basin was discussed. It is indicated that the stratal slicing technique has its limitation, that is, the isochronal slices are not necessarily on the geological deposition interface, and attribute slices are related to sensitivity and stability of the seismic attributes. In this paper based on carefully studying depositional system in the exploration area, amplitude depositional system and structure anomaly depositional system were delineated in detail. By integrating 3D fine seismic interpretation with 3D visualization technology and correctly using stratal slicing technique for identifying channel sand bodies in Damoguaihe Formation and fans in Nantun Formation in Dell Depression, it is found out that the traps in this area are mainly structure - lithology reservoirs or lithology reservoirs, H12 well was drilled in this area and commercial oil was obtained from the well.