摘要
基于叠前时间偏移地震资料对海区天然气水合物进行研究,提出一种将地质、地震资料相结合以预测天然气水合物矿藏的研究方法。首先结合物源、构造和沉积等资料进行地质分析,确定天然气水合物有利成藏区域的地质条件,然后在叠后振幅属性分析的基础上,分析了水合物地震BSR的基本响应特征,结合地质成藏条件,将本区域BSR分为4种基本类型。最终在叠前反演的基础上,预测水合物及其游离气的存在,圈定出水合物分布范围。认为水合物在研究区域海底浅层广泛分布,并且其分布受气源条件、储集空间、温度和压力条件同时控制。
The natural gas hydrate in the sea area locating in the northern part of a Cenozoic Basin is studied based on pre-stack timemigration seismic data, and a method for predicting natural gas hydrate reservoirs by combining geological data with seismic data is pro-posed. Firstly, carry out geological analysis based on gas source, structure and sedimentary data to determine the geological conditions fa-vorable to natural gas hydrate accumulation, and then analyze the seismic characteristics of BSR （bottom simulating reflector）based onthe analysis of post-stack seismic profile,the BSR is divided into four types. Finally, predict the distribution of natural gas hydrate andfree gas based on gas pre-stack inversion. According to prediction result,it is held that natural gas hydrate widely distributes in the seaarea, and its distribution is influenced by gas source condition, storage space, and temperature and pressure conditions.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2016年第1期29-36,共8页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家重点基础研究规划"973"项目(编号:2011CB201103)
