河流相砂体边界预测方法研究  

A review of prediction methods for fluvial sand boundary

作　　者：邓琳平 丁峰[1,2] 林龙波 尹成 张栋[1] 刘嘉伟 DENG Linping;DING Feng;LIN Longbo;YIN Cheng;ZHANG Dong;LIU Jiawei(School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China;Sichuan Pinnacle Geological Exploration Technology Co.Ltd.,Chengdu 610500,China;Hunan Geo-sun High Technology Limited Company,Changsha 410023,China)

机构地区：[1]西南石油大学地球科学与技术学院,成都610500 [2]四川中质鼎峰勘察技术有限公司,成都610500 [3]湖南继善高科技有限公司,长沙410023

出　　处：《海洋地质前沿》2022年第3期59-64,共6页Marine Geology Frontiers

基　　金：国家科技重大专项(2016ZX05025-001-001);中国海洋石油有限公司科技外协项目(CCL2016RCPS0110RSN)。

摘　　要：海上油田开发中后期,识别并预测河流相砂体边界是老油田剩余油挖潜中亟待解决的重点问题。由于海上井点少、井距大,砂体尺度小、散度大;密井网条件下的测井方法和常规砂体边界地震识别方法并不适用。基于能反映砂体横向展布的地震属性,使用联合双边滤波、Otsu自适应阈值处理方法及形态学算法改进Canny算子,进行河流相砂体边界的预测,形成了一套自适应、高精度的河流相砂体边界的预测方法。从河流相砂体的沉积特点和演变规律出发,建立了一组正演模型,验证了方法的有效性。将此方法应用于渤海Q油田,在目标层取得了良好的效果。In the middle and late stages of offshore oil field development, prediction and delineation of fluvial sand body boundaries become a key problem to be solved for tapping out remaining oil. Comparing to the large well spacing offshore, fluvial sand bodies are too small to be identified with conventional logging and seismic methods commonly used in the onland areas with dense well networks. Based on the seismic attributes which can reflect the lateral spreading of sand bodies, using the methods of joint bilateral filtering, Otsu adaptive threshold processing and morphological algorithm to improve the Canny operator, a set of adaptive and high-precision prediction methods for fluvial sand body boundaries are proposed in this paper. From the depositional characteristics and evolution pattern of fluvial-facies sand bodies, forward models are established to verify the effectiveness of the method mentioned above. The method applied to the target layer in the Q Oilfield of the Bohai Sea is successful.

关 键 词：河流相砂体边界 剩余油 联合双边滤波 OTSU 形态学 CANNY 

分 类 号：P744.4[天文地球—海洋科学] P631.4