In order to improve the displacement effect of lh25 million macromolecule polymer, the oil displacement experiments of single slug and multiple slug were carried out. Through the experiments, the slug combination and injection method of 0.2、0.6、0.2 PV(1 800、1 500、1 200 mg/L）were determined in the test area of zone A. Compared with the conventional 25 million polymer block, the experimental area in zone A had the same increase rate of injection pressure, but the oil reservoir, especially the thin differential layer, had better injection and production capacity. Under the same PV injection, the water cut of the production well decreased more and the effect was faster, which was better than the injection of 25 million polymer blocks. There are differences in water cut rate, effective time and effective ratio of producing classified wells, and the indexes of type III wells are better than those of type I and II wells.

Intermetal diffusion phenomenon will happen when metal matrix Pdcomposite membranes are under high temperature for a long time, which will influence the service life of the Pdcomposite membrane. By electroless plating, the palladium membrane on the surface of the porous metal supporter with different materials was prepared. And the Pdcomposite membranewas then heat treatment under high temperature in inert gas. Backscattered Electron Microscopy (BSE) and Energy Dispersive Spectrometer (EDS) crosssectional line scans were used to analysis the elements distribution of various Pdcomposite membranes, and the diffusion level of the metal matrix Pdcomposite membrane was studied by comparing it with the ceramic composite membrane. The results showed that there was no diffusion phenomenon happening to Pd/titanium (Ti) composite membranes and Pd/titaniumaluminum (TiAl) alloy composite membranes in the temperature range of 500 to 700 ℃, while serious intermetal diffusion phenomenon happened when Pd/porousstainlesssteel (PSS) composite membrane was under high temperature heat treatment (700 ℃) for 40