Geophysical Response Of Sedimentary Characteristics And Its Application In Reservoir Prediction

With the development of oilfield exploration and situation, more and more of the lithologic oil and gas reservoirs are discovered and become one of the main positions of the oil reserves and production increase, the fan delta glutenite reservoir occupies an important position. Due to the special concealment of glutenite, brought great difficulties to the description and prediction of sand body. Therefore, geophysical technology on fan delta glutenite reservoir description has important practical significance for guiding the exploration and development of this kind of reservoir. The key to look for subtle reservoirs is to use its close relationship with sedimentary characteristics. The use of seismic reflection profiles can provide sedimentary characteristics changes in plane and space.In Mahu depression of fan delta glutenite, through the comprehensive application of logging and seismic technology to make geological information and geophysical technology in combination.The fan delta in a sudden unloading process, and in the shallow water zone of water and land. The particularity of the formation conditions of fan delta determines the geophysical characteristics of glutenite has special needs of geophysical special description. In this paper, Firstly, by using seismic faces analysis to determine the macro distribution of fan delta, then the target fan body by response seismic geophysical characteristics of fine description to the characteristics of the internal structure and physical characteristics of glutenite.The goal of this research is the response features and sedimentary characteristics of Jung gar basin in northwestern margin area of Mahu depression three Triassic sedimentary characteristics of sublacustrine fan in geophysical methods in the section. The results show that, the sublacustrine fan delta front faces sand body overall slump and short distance transportation formation, the formation process is several times. Sublacustrine fan is sensitive to seismic response. Making full use of 3-D seismic data through well seismic calibration, fine comprehensive means of time slice, the sedimentary faces in seismic response characteristics, the fine characterization of the sand body space distribution characteristics. To comprehensive analysis, sublacustrine fan superimposed on a piece in the plane, the space was in lenticular; sublacustrine fan has great exploration potential of oil and gas exploration target, to lithologic oil pools. Fan Lake Superior source rock condition reservoir cap has a good relationship, oil and gas exploration potential is large, it is the exploration area of Jung gar basin.The fan delta forecasting work in this project is mainly on the basis of previous work, focusing on well deployment, through some seismic reservoir prediction using new technology and new method, carry out to sedimentary lithologic characteristics reservoir lateral variation of region spatial distribution and variation characteristics and reservoir characteristics of the seismic detection and comprehensive forecast work, provides a basis and support for the region’s exploration and deployment.