Identifying and Classifying the Favorable Oil Units by Using Structure of Seismic Data ——By Taking Wellblock YB1 of Yubei Oilfield for Example
LI Mou-ji · Journal of Oil and Gas Technology · 2013
Oil(gas)reservoir existed in certain underground conditions of traps,geophysical characteristics were implicated in seismic data.Seismic data structural characteristics were one of the most stable and nature methods.With the theory of gray system,the amplitude data of seismic trace were generalized accumulatively,GM(1,1)model was used to predict its genetic sequence,the predicted sequence was compared with original one,by which error sequence was produced,the error value could reflect the size of structural abnormality.A correlated analysis was performed on the calculated structural abnormality and oil and gas production,the abnormal character of oil and gas response was summed up for the purpose of direct seismic prediction.The method is used to predict the distribution of oil units in Wellblock YB1of Yubei Oilfield,the result is contrasted with actual drilling and testing data,good result of prediction is obtained.