标题:
地震属性分析技术在水下分流河道砂体预测中的应用Application of Seismic Attribute Analysis Technique in Prediction of Underwater Distributary Channel Sandbody
作者:
刘勇江
关键字:
水下分流河道, 测井相, 地震响应特征, 地震属性Underwater Distributary Channel, Log Facies, Seismic Response, Seismic Attributes
期刊名称:
《Journal of Oil and Gas Technology》, Vol.39 No.3, 2017-06-15
摘要:
建南地区三叠系须家河组六段(T3x6)为一套三角洲前缘水下分流河道的陆相碎屑岩沉积，具有全区富砂、整体含气、局部富集的特征，具备形成岩性隐蔽性圈闭的有利条件，天然气的局部富集受沉积相带控制。由于该区水下分流河道砂体横向变化快，仅依靠钻井揭示的信息难以对其分布规律进行精细描述和分析。从井出发，利用测井相明确单井所处的沉积相带，利用模型正演明确典型的水下分流河道砂体地震响应特征，结合地震属性分析对建南地区T3x6水下分流河道砂体发育区进行预测，取得了较好效果，对勘探开发有一定的指导意义。
The sixth member of the Xujiahe Formation (T3x6) in Jiannan Area was a continental clastic rock deposit with a delta frontier underwater distributary channel, which had the characteristics of rich sand, the whole gas-bearing and local enrichment, and had favorable conditions for forming a lithologic and subtle trap and the local enrichment of natural gas was controlled by sedimentary facies. Due to the rapid and lateral changes of the sand body in the underwater distributary channel of the area, it was difficult to describe and analyze the distribution rules by using the data of drilling. Therefore, based on the wells in the study, the logging phase was used to identify the sedimentary facies of the single well. The forward modeling was used to clarify the typical seismic response characteristics of river sand bodies, and the seismic attribute analysis was used to predict the sand body development area of the underwater distributary channel. The results show that good effect is obtained in predicting the distribution of sand bodies in the underwater distributary channel of Xujiahe Formation in the Jiannan Area. It has a certain significance for exploration and development.