The Geophysical Response And Exploration Principle On Litho-Stratigraphic Reservoir

As we know,the simple structural reservoir is only controlled by structure factor,but the oil-gas accumulation of litho-stratigraphic is controlled by many factors,such as lithological and physical properties,etc. So identifying characters of the lithological,the geometrical,the physical and hydrocarbon potential about litho-stratigraphic reservoir is the main task of seismic reservoir prediction,in order to provide important basic datas for geological comprehensive evaluation,well placement arrangements and estimates of reserves.This study will focus on the combination of geology and geophysics. In fact,there is no special emphasis on new seismic technology,but emphasis on the adaptability of seismic technology. To make good use of seismic technology and to maximize the role of technology used,firstly depends on the ability of the geophysical staff to seize the key geological problems,and secondly depends on fully integration of geological analysis and geophysical technology to create targeted research ideas and to establish a good application of geophysical technology series. The main results of research and innovation include:1. According to different seismic reflection characteristics,the litho-stratigraphic will be divided into 6 categories,including river channel,(fan) delta-type,subsea apron,burial hill,carbonate reefs and karst-type,volcanic rock type. The study dissertates their geological characteristics , seismic facies characteristics , and reservoir prediction techniques and methods.2. Combined with previous research results,and based on the perspective of seismic,the study introduced the exploring difficult of eastern and western petroliferous basins,and bring forward the targeted research ideas and technology.3. The reservoir characteristics inversion technique of proposed acoustic based on model is one of the most effective technology for predicting the thin oil reservoir in the eastern part of oil region.4. In the course of the study of volcanic gas pool in the deep zone of Songliao basin,two technical series have been established,which are the gas bearing formation prediction technique with wells and the targets description technique with no wells. These techniques can provide suitable technical approaches of the seismic study for reserves calculation and wells placement arrangements.5. The spatial distribution of the volcanic gas pool which is less the resolution of seismic data has been predicted accurately using a simple and reliable relative velocity inversion method of lower resolution. As a result,the method provides the seismic data to deploy the track way of horizontal drain hole for the oil field.6. A method using spectral rate properties and seismic attenuation attributes to predict gas-bearing of volcanic targets is confirmed successfully,which method effectively changes the difficult situation of the gas-bearing detection,and greatly improves the certainty of well placement arrangement.The application of reservoir prediction technology and objectives optimization techniques mentioned had achieved significant results in some areas.