摘要
气藏描述是一项新兴的综合性技术，涉及的内容较多，主要介绍气藏构造形态描述和储集层物性参数描述的技术方法：时深转换是气藏构造形态描述的关键，在钻井很少的情况下，利用地震速度体进行变速时深转换是唯一可行的方法；根据储层厚度的不同，计算储层厚度的方法也各不相同，低频能量法和神经网络法是计算薄层厚度的理想方法，道积分时差法则适用于厚层的计算；利用地震信息计算储层孔隙度是当前常用的方法，另外，人工神经网络是建立孔隙度与地震参数之间关系的最有效办法，同时利用层速度计算储层孔隙度也是一种行之有效的方法。由于海上钻井成本太高，在油气田的评价中不可能钻太多的评价井，用地震资料的多种信息来确定气水界面便成为最重要和最常用的方法。
Gas reservoir description is a new and rising comprehensive technique,which covers a lot of ground.The techniques and methods of describing the structural configuration and petrophysical parameters of gas reservoir are mainly introduced in the paper.The time depth conversion is the key to the structural configuration description of gas reservoir,the velocity variant time depth conversion by use of seismic velocity data being the unique feasible method under the condition of rarely drilling.Because of the variation of reservoir thickness,its calculation methods are different,the low frequency energy and neural network methods being the ideal ones of calculating the thickness of thin reservoir and the trace integration delta time method being applicable to calculating that of thick reservoir.It is a common and efficient method to calculate reservoir porosity by use of seismic information or interval velocity at present and the artificial neural network is the most efficient method of setting up the relation between porosity and seismic parameters.Owing to the fact that the cost of offshore drilling is too high,it is impossible to evaluate an oil or gas field with many wells,so that it is the most important and common method to determine gas water interface by use of the multiple information picked up from seismic data.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
1999年第1期57-60,共4页
Natural Gas Industry
关键词
气藏描述
储集层
孔隙度
地震勘探
Gas reservoir description,Reservoir,Thickness,Low frequency exploration,Nerve network,Porosity,Gas water interface
