The Research On Reservoir Predicting And Depicting Technology Of The Beach Bar Sandstone Of Shore-shallow Lake In DongYing Region

By researching at present, analysis deeply domination function of the beach bar sandstone development and distribution mainly utilizing sedimentation theory, which is acted by pale geomorphology, wave base level, material source, based on the depositional characteristics of various genetic types of beach-bar sandbodies in Dongying depression, this paper establishes depositional model of various genetic types of beach-bar sandbodies in gentle slope belt of continental faulted lake basins,summarize systematically beach bar sandstone's depositing mode and reservoir character in different sediment environment; implement fine interpretation of the beach bar sandstone peak construct shape by plurality synthetics calibration, coherence analysis technology; and analysis the character and shortage of pale geomorphology renewing technology anciently, with the repeated experiments, develop out perfect pale geomorphology high precision renewing technology, implement accurate reappearance of pale geomorphology background.Aiming at the fact developing character of the beach bar sandstone reservoir, design beach bar sandstone geology models of different thickness, different lithology combination, with the forward modeling, summarize systematically seismic wave character of the beach bar sandstone; generalize beach bar sandstone's seismic attribute characters of different stratum lithology combination;Still create the corresponding connection between beach bar sandstone's physical responding character and the degree of reservoir developing and seismic identification mode of beach bar sandstone; based on the acquaintance from forward modeling result, with correlation analysis of borehole seismic data and calibration technology, on basis of special geology character of the beach bar sandstone in different zone, develop corresponding reservoir predicting and depicting methods; attempt to evaluate reservoir quantitatively by seismic attributes, and get the better effect; This paper sums up the storage capacity and effect factor of various genetic types of beach-bar sandbosies in continental faulted lake basins through studying the characteristics of formation structure, petrology, probability and C-M graphs, paleontology, sedimentary structure, velocity, electrofacies and seismic facies and other physical properties of various genetic types of beach-bar sandbodies reservoir ; study the domination function of beach bar sandstone acted by fracture system and paleo-now construct background, integrate many kinds of material, and combine mult-azimuth information, implement integrative evaluation of the beach bar sandstone.Innovatively forming high precision palaeogeomorphology recovery techniques, reservoir prediction techniques by modeling seismic waveshape, and reservoir quantitative assessment techniques based on the dimension reduction analysis of various attributes.It is presented for the first time that the uppermost position of the palaeotopography is mainly deposited by beach sands and is unfavorable for bar sands to deposit.It play an important role in exploration process and acquire favorable effect, make the overall exploration benefit improved more.