Quantitative Characterization Of Sand Body Connectivity And Prediction Of Oil Migration Path

Sand body in Shulu Slope of Hebei Central Sag is more developmental, as one of the main transport layer conductor transmission developed in this area, it plays a very important role in migration and accumulation of oil and gas.With the research on the carrier issues becomes more and more thorough, the characterization gradually develops from qualitative to quantitative.This paper bases on the results of previous studies and a large number of statistical work, according to the distribution regularities of oil and gas and distribution characteristics of sand shale in the region, the study area is divided into five sets of carrier firstly, they are Es1, Es2, Es3-1, Es3-2~Es3-3 and Es3-4~Es3-5. We further statistics of the oilfield production measured data, establish hydro-dynamics connectivity evaluation model of the Second Member of Shahejie Formation, and obtain the threshold value of connectivity. Due to the production measured data is limited, the statistics for hydro-dynamics connectivity of other carrier is difficult, so we do statistics of the sand ratio of the single well and the display of corresponding oil and gas, and compare the model results of the Second Member of Shahejie Formation with the statistical results, found that the results are basically consistent, so the connected threshold values of other carrier can be obtained by the statistical results of the sand ratio of the single well and the display of corresponding oil and gas. On the basis of the threshold value of every carrier we can describe the sandstone carrier connectivity quantitatively.According to the above results, we use Petromod software to establish a three-dimensional geological model, to simulate the migration path, and to fine describe the region’s dominant migration path of oil and gas. The reservoir distribution of the simulation results is generally consistent with the actual reservoir distribution in the region, which indicates that the quantitative evaluation model and the 3D geological model in the early stage are reliable.Finally, according to the results of simulation and the research on fault sealing, we can predict the dominant migration path and favorable zone of oil and gas effectively.