综合正演模拟及分频解释技术预测粗面岩  

Application of Forward Modelling and Spectrum Decomposition Technique in Prediction of Trachyte

作　　者：董文波[1] Dong Wenbo(Research Institute of Exploration and Develop,Liaohe Oilfield Branch Company,Petro China,Panjin,Liaoning 124010,China)

机构地区：[1]中国石油辽河油田分公司勘探开发研究院

出　　处：《非常规油气》2019年第4期6-9,共4页Unconventional Oil & Gas

基　　金：国家科技重大专项“渤海湾盆地辽河坳陷中深层稠油开发技术示范工程”(2011ZX05053);中国石油天然气股份有限公司科技专项“辽河油田原油千万吨持续稳产关键技术研究”(2012E-3001)联合资助

摘　　要：辽河盆地东部凹陷发育粗面岩油藏,赋存了大量油气资源。但由于粗面岩储层较少,故研究程度较低,而且其岩石物理性质特殊,分布规律性差,缺少具有针对性的预测技术,制约着粗面岩油藏的勘探和开发。对此,在应用实际地层参数建立地质模型的基础上,基于正演模拟对粗面岩的地震响应特征进行了分析,并据此提出了以分频解释技术为主,以地震属性分析技术为辅助的预测方法。研究成果如下:①地震正演模拟成果表明,粗面岩发育区具有低频、强振幅的地震响应特征,而且当粗面岩的厚度变化时,该特征随之变化的幅度很小,基本保持稳定;②根据粗面岩分布区的低频特征,振幅调谐体频率切片可以有效识别粗面岩体;③平均反射强度和平均波峰振幅对于粗面岩引起的振幅异常较为敏感,而且对砂泥岩变化引起的弱振幅异常具有过滤效应,结合分频解释预测结果,可以对粗面岩空间展布进行预测。There are abundant hydrocarbon resources in long-range trachyte in Eastern sag,Liaohe Depression.But the degree of research is low as the less development of trachyte reservoirs.and due to the particularity of trachyte on geophysical properties and the poor distribution regularity,there is not a set of targeted prediction technology that restrict the future exploration and development of trachyte reservoir.For this purpose,we analysis the Seismic response characteristics of trachyte by forward modeling use the actual formation parameter model.and establish the forecasting technique,mainly include spectrum decomposition technology and seismic attribute analysis technology.Here are some conclusions as follows:①The forward results show that the trachyte characterized the low frequency,high amplitude,and this characteristic is stable when the thickness changes;②According to the low frequency characteristic,we can predict the distribution of trachyte by spectrum decomposition technology;③we can predict the distribution of trachyte by Average reflection strength and average peak amplitude,and they can suppress the amplitude abnormal caused by sandstone and glutenite.The combination of the two can realize the prediction of trachyte.

关 键 词：辽河坳陷 油气勘探 粗面岩 正演模拟 分频解释 地震属性分析 

分 类 号：TE122[石油与天然气工程—油气勘探]