裂隙识别技术及其在油气和水合物勘探中的应用

裂隙是油气藏和天然气水合物成藏成矿的有利疏导体系,但是受地震分辨率的影响,微裂隙不易用常规手段识别。为研发一套实用的裂隙识别技术,文章分析了裂隙的地震波运动学和动力学特征,结合相关技术功能原理,融合三维可视化技术、相干技术等方法,在莺歌海盆地的底辟构造中成功刻画出裂隙通道,并据此技术发现大气田。经实践及分析,该技术亦可应用于琼东南盆地天然气水合物的疏导体系研究,是一套行之有效的裂隙识别技术。

Fracture identification technique and its application in gas and hydrate exploration

Fractures are favorable transport systems for forming of hydrocarbon reservoirs and gas hydrate deposits. However, it is difficult to identify micro-fractures by conventional means due to limited seismic resolution. For the development of practical fracture identification technique, we analyze seismic wave kinematic and dynamic characteristics of fractures, combine functions and principles of relevant techniques, and fuse 3-D visualization technique and coherent technique. Fissure channels were successfully characterized in diapiric structures of the Yinggehai Basin, and gas fields were discovered using this technique. Through practice and analysis, this technique can also be applied to the study of gas hydrate migration system of the Qiongdongnan Basin. It is an effective fracture identification technique.