Prestack Inversion And Reservoir Prediction Of The Second Member Of The Triassic Bayanquan Formation In The Mabei Slope, Junggar Basin

In recent years, people received several industrial oil well from the Baikouquan formation section two of Mabei slope, the whole group contiguous reservoir area formed by the X72well area, Ma15well area and Ma13well area show that Baikouquan formation section two has good prospects for oil and gas exploration. The Baikouquan formation section2of Mabei slope area are fan delta sedimentary, glutenite reservoir has fan stack of multiple in the longitudinal, lithology and thickness in the lateral have changed a lot, reservoir heterogeneity is strong, pore types is mainly composed of the residual intergranular pore and intragranular dissolved pore, it has low porosity and permeability characteristics. This feature makes that there is a big problem of reservoir classification evaluation and prediction for using log data and seismic data. Combined with low seismic data resolution and signal to noise ratio, it is necessary to carry out amplitude processing work for the three-dimensional seismic data. How to use logging, seismic data to predict fan delta front favorable facies belts, implementation of the objectives and favorable reservoir spatial distribution range is an urgent need to solve the problem in the area. Based on the current development needs of the exploration technology in complex area, and the AVO technology production background, the history, current situation and development trend of knowledge and understanding,, conduct seismic amplitude preservation processing (amplitude processing technology, surface consistent processing technology, pre-stack time migration and fine velocity analysis). Carry out petrophysical analysis and prestack reservoir prediction, clear the rock features of main formation and geophysical response characteristics of reservoir. According to characteristics and technical difficulties of the work area, apply seismic inversion techniques (including those based on multi-attribute characteristic curve post-stack inversion, AVO pre-stack inversion) and other reservoir prediction methods, predict and research the distribution of high quality reservoir in the area, better to predict of the fan delta high quality reservoir. It provided technical support for well deployment and reserves handed.