Seismic Accurate Description Study Of Igneous Rock Reservoir

Since we began the large-scale exploitation of oil and gas,the study of reservoir never stopped,but we pay the most attention on the sedimentary rock reservoirs without the igneous rock in it.Now with the energy consumption being larger and larger,igneous rock reservoirs are gradually into people's horizons.But because of problems such as the deep buried depth,various types of reservoir space types,lack of logging data and outcrop igneous rock and so on,we cannot effectively analyzed.All of these make the igneous exploration a world's problem with important theoretical research value.This paper has carried on the thorough investigation of the car sub region igneous rock exploration situation,and makes an understanding of the main control factors: rock types,faults and plane of unconformity.So this paper makes a comprehensive utilization of seismic attribute technology,seismic facies analysis technique,waveform classification technique,for the classification and prediction of the igneous rock lithofacies.Using the multi-scale coherence and ant body techniques for the fault features description.Finally using the method of time-frequency analysis based on matching pursuit for the absorption attenuation properties application of the work area.Research shows that:(1)the well data in combination with seismic facies analysis can be more accurate for the igneous lithofacies division,the research targets have been cleared,and laid a solid foundation for further analysis of the properties.And seismic attribute analysis method is a key technology in seismic interpretation,due to the different response characteristics of the different igneous rocks lithofacies,seismic attribute analysis technology for igneous rock also has a good effect.(2)The ant colony algorithm rises in recent years as an image processing technology,and is gradually applied for the fault recognition,this paper applies the wavelet multi-scale analysis in the coherence and ant tracking technology,the recognition for the construction of large faults and tiny fracture has a good effect,the effect of igneous rock fault prediction for work area is remarkable.(3)Compared with the traditional methods,the time-frequency analysis based on matching pursuit method has no cross terms and is not restricted by Heisenberg's uncertainty principle,and the algorithm is concise.Seismic waves spread through oil and gas area in the underground,the energy is obviously weakened,reducing frequency will occur,so the absorption attenuation property with high accuracy based on matching pursuit can be effective to forecast the oil and gas development area.