The Effective Role Of Asp Compound System In The Class Ⅱ Reservoir

Through constant velocity mercury injection technique, the pore structure in the Classâ…¡reservoir in center of Saertu oil field is described in this paper. RF and RRF are determined with core flow tests. The reaction of alkali and mineral composition is described, revealing the main consumption factors. The injury rate of ASP system on the Classâ…¡reservoir is provided also. The adsorption of single-dose of ASP system is measured through adsorption experiment of oil sands. Dynamic retardation test showed that, in the natural rock core on behalf of Classâ…¡reservoir, the dynamic retention of alkaline in ASP compound system, surfactant, and polymer is 26.6%, 39.5%, 30.8%, respectively. The chromatographic resolution of alkazid ASP compound system on the formation is studied aiming at the interface model of artificial core and natural core, their test results are compared with that of main reservoir. In addition, the effect of filtration distance on chromatographic resolution of ASP compound system is analyzed with the filling model of oil sand of Daqing classâ…¡reservoir. Results shows that in the interface model of natural core and classâ…¡reservoir, the breakthrough time of polymer, alkaline, surfactant is delayed to 0.1PV; 0.07PV, 0.07PV, and WA-P, WA-S, WS-P are increased by 0.11PV, 0.36PV and 0.47PV. Micro-displacement experiments show that the residual oil after water flooding mainly is columnar, clustered and isolated residual oil, only a few distributed in blind tubular. The quantitative analysis of microscopic displacement effect of model reveals that the flooding recovery of water and ASP is 52.8% and 30.9% respectively, and the ultimate recovery is 83.7%. During the water flooding, the isolated residual oil has the highest producing portion of 92.2%, followed by columnar residual oil of 74.1%, and the clustered residual oil has the lowest of 59.7%.