TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThe chemical screening and chemical formulation studies were discussed in this paper, and the pilot test results as well for the ASP combination flooding pilot test in Karamay EZ District. Also the designing strategies of the ASP process were included in this paper. The ASP pilot test started from August 21,1995 with the beginning of NaCl brine pre-flush in order to condition the reservoir, then followed by ASP slug and Polymer slug. The post-water injection was applied after the designed chemical injections. The 24%OOIP incremental oil recovery was achieved in the whole test area with about 25%OOIP incremental oil recovery for the central production well . 5 Conclusions1. The laboratory studies showed that the EZ District in Karamay Oil Field was suitable for ASP flooding technique in technical point of views. 2. The synergistic effect was observed for KPS/ Na 2 CO 3 system with pilot area crude oil. 3. The surfactant, KPS-1, manufactured in local refinery was very compatible with reservoir fluids and rock of the target pilot test area. 4. Both ultra-low IFT and proper mobility control were very important for improving oil recovery purposes for most of Karamay reservoirs, the highly heterogeneous conglomerate reservoirs, 5. The implement of the ASP process improved both planar conductivity and vertical flow in the pilot test area. 6. The 24% OOIP incremental oil recovery for pilot area and 25% OOIP incremental oil recovery for the central production well were achieved by the use of ASP combination flooding process in pilot test area.