Study On Forecast Technology Of Reservoir And Application In Liaohe Area

With the development of seismic exploration, the land oil and gas prospecting already stepped into a new age which lithology and structure oil and gas reservoir are existing together in our country. Small range structure oil and gas reservoir, roll extending border for prospected area before and lithology oil and gas reservoir turned into main object to explore. So finding out the lithology, feature of geometry and physical parameter of reservoir layer, provide important evidence for geologic integrate evaluation, positioning well, estimating of reserves, for reservoir rock evaluation, is the main mission of reservoir rock evaluation.The program applied one of the popular methods (seismic data inversion, seismic wave's attribute analysis, AVO analysis) at present, seismic data inversion technology to research and analyse. Through theory and method researching of seismic inversion, we choose the post-stack seismic inversion as the emphase of this program. According to precision requirement of the thin reservoir layer predicting, we did the wave impedance inversion to a 3D seismic data in Liao He west depression adopting lithology inversion in random. We conduct the predicting to the target reservoir layer's configuration and the distributing rule in cross direction. The last predict result is fit for the geologic rules get from the practice production in this area.In this program, we mostly did the following works.(1) Attempt to process and analyse the well log data.(2)Application of calibration basing on reference layer, make thin reservoir layer's measuring more exact.(3)Quoting the methods of geologic statistics, achieving from qualitative to seimi-quantitative(4) We did the 3D carving for inversion result, make it more intuitionistic.(5) Because the fault isn't considered in complicated reservoir layer predicting before, there is error between predict and real geology. This time, we apply fault controlling during building model.The reservoir layer predicting as an important part of seismic interpretation, geological integrate evaluation, is various, complicacy and integration work. Because of the requirement of production, and widely application, it is thought much more and more by people. Want to do well at reservoir predicting, firstly must have good quality seismic data, facing to different target layer, we adopt suitable researching thoughts and methods. Secondly, the researcher must have plenty knowledge in geology and geophysics. Then we can provide accurate and effective technique parameters for oil and gas prospecting.