天然气水合物勘探技术研究现状

Technology Developments of Natural Gas Hydrate Exploration

简要介绍了天然气水合物及其研究现状、天然气水合物聚集的地质特征和地球化学异常识别技术。介绍了以似海底反射层、AVO技术和速度振幅结构为主的天然气水合物地震检测技术。阐述了电阻率测井、声波时差测井等常规测井方法和介电测井、随钻测井等4种特殊测井方法以及天然气水合物孔隙度、饱和度和泥质含量等天然气水合物的测井解释方法,同时指出了目前天然气水合物地震检测和测井中存在的问题及今后的研究方向。

This paper briefly introduces the gas hydrate, present research situations, geological feature oi accumulation and geochemistry identification technology for the natural gas hydrate. In addition, its seismic detections is presented, including bottom simulating reflector, Amplitude Versu Offset and Velocity and Amplitude Structures. Two conventional logging methods （resistivity log and acoustic travel time log） and two particular logging methods （dielectric log and log while drilling） are discussed in this paper. Moreover, well logging interpretation methods are also presented, including porosity, saturation, and shale content of the natural gas hydrate. Finally, some problems of seismic and logging techniques and expanding trends of the research are pointed out.