The Research And Application Of Reservoir Predicting Technology In Block A Of The Amudaline Basin

At the new phase of transition from mainly detecting structure closures to expecting compound structure and lithology formation closures, seismic reservoir predicting technology was deeply studied and played a key role. Based on seismic data, seismic reservoir predicting technology synthetically applied other data such as geology, well log and petrophysical data as bond in order to predict the geometry features, geology features and petrophysical features (specifically are lithology, conformation, physical property and oil-gas bearing) of the oil-gas reservoir. The technology applied the seismic inversion technology, seismic attributes analysis and other multiple technologies to integrate study so that the spatial variation of the reservoir could be obtained. It could seize the horizontal and vertical variations of reservoir formation conditions in oil-gas bearing basins and discover interesting oil-gas accumulation zones. All this would provide scientific criteria for exploration and development.Firstly, the thesis deeply studied and researched theories, categories and application conditions of common seismic inversion methods. Then the development history of inversion methods was simply introduced. Basically, seismic inversion could be divided into pre-stack and pos-stack inversion. Nowadays, the application of pos-stack inversion was the most popular technology. The pos-stack inversions mainly include trace integration inversion, recurrence inversion and model based inversion, etc. Besides that, the thesis simply introduced theories, categories and development situation of seismic attributes analysis technology in reservoir predicting. And the author discovered the most sensitive attributes according to the study operation block.Based on the study of lithology features in the study block, the thesis processed deeply research study on configuration of organic reef in carbonate formations. According to the results of research, the author knew the living environment of organic reef and their reflective features and configuration symbols on seismic sections. The author mainly applied a model-based inversion on EPS software according to the actual situation of this study block. This inversion method which is based on broadband constrained simulated annealing algorithm could transfer the known conditions to specify bond in order to control the process of inversion and gain the optimize results. This method is applied in Amdaline basin block A. On the inversion sections, the results show well horizontal continuation, natural transition in lithology between wells, high resolution, abundant lithology information and better formation lithology horizontal variation. All the inversion results are well matched to well logs. Meanwhile, the attributes analysis technology is applied in reservoir predicting in the block. The author extracted three frequency attributes which are sensitive to the block and amplitude attributes. The interesting reservoir lateral distribution is predicted through quantity attributes predicting and frequency domain based attributes which are used to detect fluid. Finally, the thesis applied multiple information synthesis technology to predicting interesting reservoir distribution in the study block.