摘要
渤海油田勘探实践表明,小微断裂精细识别是构造解释和发现规模性圈闭的关键。研究区处于多方向断裂叠合带,地震资料品质差,尤其是小微断裂剖面上断面不清晰、同相轴错断不明显。先利用复赛谱整形拓频技术改善小微断裂的分辨能力,再通过自适应双向滤波,改善小微断裂成像精度,最终利用新的相干切片重新落实了构造区圈闭,圈闭面积得到了大幅增加。钻井评价证实新增的圈闭是有效的,获得了很好的油气发现。
The exploration practice of Bohai Oilfield suggests that the recognition and identification of microfaults are critical to tectonic interpretation and discovery of large traps. The study area of this paper is located in a superimposed zone of multi-directional faults, and the quality of seismic data is rather poor, and especially the micro-fractures and the axis in-phase faults are not so clear. To solve this problem, we firstly used the rematch spectrum shaping and frequency extension technology to improve the resolution of small micro-breaks, and then used the adaptive bidirectional filtering to improve the accuracy of micro-fracture imaging. Finally, the new coherent slices are used to re-implement the structural trap, and as the result, the areas of traps are greatly increased.Drilling verification suggests that the new approach is effective for oil and gas discoveries.
作者
乔柱
谢祥
揣媛媛
吴景超
张德龙
QIAO Zhu;XIE Xiang;CHUAI Yuanyuan;WU Jingchao;ZHANG Delong(Bohai Oilfield Research Institute,Tianjin Branch of CNOOC Ltd.,Tianjin 300459,China)
出处
《海洋地质前沿》
CSCD
北大核心
2021年第12期83-87,共5页
Marine Geology Frontiers
基金
“十三五”国家科技重大专项“渤海海域勘探新领域及关键技术研究”(2016ZX05024-003)。
关键词
渤海油田
小微断裂
复赛谱整形拓频
自适应双向滤波
Bohai Oilfield
small scale faults
rematch spectrum shaping and frequency extension
adaptive bidirectional filtering
