Study on macro heterogeneity and its influence factors of Qing1 member in Daqingzi oilfield

Reservoir heterogeneity was the main reason affecting the recovery factor and the percolation of water, oil and gas. So it was quite necessary to study the reservoir heterogeneity, find out the influence law, clarify the remaining oil distribution, and take reasonable measures and enhance factor. The reservoir in the first member of the Qingshankou formation in Daqingzi oilfield is low and extra-low in porosity and permeability. The analysis was made on the inner layer,interlayer and the plane heterogeneity of the reservoir by comprehensive application of the data of the cores thin slices,casting lamella,electron microscope scanning and X-diffraction. The research showed that the main objective reservoir in Daqingzi oil field had high heterogeneity, the macro heterogeneity was controlled by these continental micro-facies and digenetic facies of reservoirs, and the buried depth had a certain influence on the reservoir heterogeneity.