Research On Polymer Enhanced Oil Recovery Technologies Based On Particles

In this paper,according to the geological characteristics of the offshore heavy oil reservoir and the specific requirements of enhanced oil recovery,the laboratory use the composites(polymer microspheres with polymers)flooding technology.The polymer microspheres have the ability of plugging and stranding in the pore throats under the microscopic dynamic forms.For the heavy oil reservoir permeability part,that is the synergistic effect.This effect can improve the ability of the flowing redirection of the polymer flooding,also slow down the unidirectional breakthrough in the polymer injection process,and increase the swept volume of the chemical flooding,so finally achieve the purpose of improved oil recovery.Target size particles were obtained using inverse suspension polymerization,and then examine their swelling power.Meanwhile,mix with polymer AP-P4,research the mixture shearing resistance and influence factor of viscosity.Through round core displacement experiment,confirm the best particle system,and tentatively decide its combination and injection mode.Through heterogeneous core displacement experiment,research the economical and efficient combination mode of particle SSZ and SSA.Finally,through Slab Model experiment test the ability of enhanced oil recovery,then find a good flooding method which the price is reasonable and can enhance the oil recovery for the SZ36-1 oilfield.At last,through determining total and residuary resistance coefficients,evaluate the plugging property and retention capabilities point at different permeability layers.