Research on Threshold for Water Flooding of Ultra-low permeability Reservoirs

摘要

As development of peripheral Daqing oilfield, field evaluation are worse and worse. Now bearing of oilfield is low, most of oil remaining is in ultra-low permeability reservoirs. A peripheral Daqing oilfield of ultra-low permeability reservoirs is taken for example. Pore structure feature is researched, in order to knowledge threshold for water Flooding. Average throat radius, content of clay mineral, content of mobile fluid, pseudo-actuating -pressure gradient and crude oil viscosity are classified of single element. Reservoir is evaluated in comprehensive classification method. Rightful program of well pattern deploying is certain in order to supple technique guaranty.