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天然气水合物是一种新型能源,形成水合物的天然气主要是来自于下部生烃源岩,当天然气在向上溢出的过程中遇到温度、压力和地层物性合适的区域便形成了天然气水合物矿藏。但天然气又是靠什么路径运移到储层的呢?经过研究,认定研究区的天然气主要是利用气烟囱进行运移的。而气烟囱识别分析技术就是利用研究区三维地震信息,通过对地震剖面的分析以及神经网络的运算,对天然气运移形式进行描述,直观地展示天然气运移通道及赋存情况,通过垂向上和平面上的气烟囱效应来预测水合物的发育带,并将形成水合物富集所需要的天然气源岩进行初步评估。然后在平面上展示出天然气运移分布范围和天然气水合物矿藏的成藏范围,从而为进一步研究水合物的形成、存储提供依据,并可为水合物勘探中的井位部署提供参考。
Natural gas hydrate is a new type of energy source. The hydrate-forming natural gas is mainly derived from the lower source rock. Gas hydrate deposits are formed when the natural gas encounters temperature, pressure and formation properties in the upward spillover . However, what route is natural gas transported to the reservoir? After research, it is concluded that the natural gas in the study area is mainly transported by the gas chimney. The gas chimney recognition and analysis technology utilizes the three-dimensional seismic information of the study area to describe the natural gas migration form through the analysis of the seismic profile and the operation of the neural network, visually shows the natural gas migration channel and its occurrence, and through vertical and The gas chimney effect in the plane is used to predict the hydrate development zone and to make a preliminary assessment of the natural gas source rocks required for the formation of hydrate enrichment. Then, the distribution range of natural gas migration and the hydrocarbon accumulation range of natural gas hydrate deposits are demonstrated in the plane, which provides a basis for further study on the formation and storage of hydrates. It also provides a reference for well location deployment in hydrate exploration.