| Sandstone transporting layer as one of hydrocarbon conduit Systems in southern slope ofNiuzhuang sag, plays an important role in the oil and gas lateral migration. However, study ontransporting performance of the sandstone transporting layer is still in the qualitativeunderstanding phase. Thus quantitative evaluation of its transporting capacity is the weak linkin the study. It is a challenging research project.This paper based on the results of previous studies and a large number of statistical work,takes sandstone transporting layer in Es3m-Es2of southern slope of Niuzhuang sag as anexample. The relationship between static and dynamic elements of Sandstone transportinglayer and oil-gas shows is analyzed. Relationship between sandstone thickness, buried depths,attitude, physical properties (capillary force) of sandstone and transporting performance isresearched; quantitative evaluation of transporting performance is unfolded.Research result indicates sand body attitude and sandbody physical properties haveobvious relation with oil-gas shows, coupling of sandbody attitude and heterogeneitycontrols oil-gas advantageous migration paths. Related physical simulation experiments haveproved this conclusion. Thereby calculation method of sandstone transporting performance isdetermined, and sandstone transporting performance quantitative model is proposed, oil-gasadvantageous migration paths are depicted subtly. Geochemical analysis and oil and gasmigration numerical simulation results have proved the advantageous paths, which shows thatthe quantitative evaluation model of sandstone transporting performance is reliable.At last, favorable exploration directions are predicted near the advantageous migrationpaths. Since2009, under the guidance of research result, Wang58well area and the guan126-Wang664well area were proven, the geological reserves in the northern slope of Guangraouplift were predicted. Significant exploration results had been made. |
