Evaluation And Deployment On Putaohua Reservoir Of Zhao10 Area In Songliao Basin

Zhao 10 area in Songliao basin is in the Zhaozhou oil field.This area is about 8.21km2,located in Daqing Heilongjiang Province.Putaohua reservoir is a typical of low permeability reservoir,part of the area has entered the production development stage,but there are many problem of unclear cognition of the geological characteristics and the development well network, this paper is based on the previous of Daqing Putaohua formation of structural and sedimentary reservoir study,according to the subject of structural geology, sedimentary petrology, petroleum geology and sequence stratigraphy, summed up the basic geological characteristics and controlling factors of Putaohua reservoir.Through the structural feature, sedimentary microfacies, analysis of reservoir characteristics, and finally to block the reserves of comprehensive evaluation, determine the oil and gas enrichment area, then proposed the new wells development scheme.The main achievements are as follows:(1) Based on the analysis of structural evolution,faults in study area are well developed and complex distribution,near the north and south trending faults cutting area into some block traps.(2) Putaohua reservoir belongs to the delta front sedimentary environment, there are foursedimentary microfacies, it is the underwater distributary channel, debouch bar, seats like sand and mud deposition.The mainly developed microfacies is the underwater distributary channel and the sand deposits.(3) The reservoir performance the characteristics of low porosity and low permeability, there are three kinds of reservoirs(A B C),and the mainly reservoir filled in the area is B.(4) The reservoir is mainly controlled by the fault.Divided the area into 8 fault block, delineated the oil-bearing area.Calculated and evaluate the geological reserves in different fault blocks,determine the oil and gas enrichment zone.