Study On EOR In Qinjiatun Oilifeld

Qinjiatun oilfield SN106block Qinjiatun oilfield is located in the south of SongliaoBasin, in the eastern slope zone ten house broken, as the North East to large nose structurebelt, fold area of nearly100square kilometers, by many faults, forming a plurality of faultblock trap, structural high short-axis anticline traps for independent. Reservoir developed inthe upper Cretaceous Quantou Formation, lower Cretaceous Denglouku formation, complexsmall fault block reservoirs. After10years of development, the SN106block has manyproblems, for example: the reservoir heterogeneity is serious, plane and interlayercontradictions and conflicts, part of injectivity in low, high water injection pressure, water cutrising rate is high. The current calibration recovery rate was only14%, recovery efficiencygreatly improved space.Aiming at the problem, this paper through the research of block SN106of QinjiatunOilfield Geology, the basic structure, the block deposition, reservoir and fluid characteristics,analyzes the current status of the development of the water block, points out the existingproblems, finds out the main causes of Qinjiatun oilfield SN106block low recovery rate wasless affected direction, serious reservoir heterogeneity, plane and interlayer contradictions.Given the enhanced oil recovery technology strategy, through the developmentadjustment, so that the original well pattern mining conditions with poor reservoir to use, inorder to improve the oil recovery rate, decreasing compensate for main oil yield. In wellgroup as unit, combined with production profile, injection profile, tracer monitoring data, thestratified water data, analysis of oil well effect, judging water flooded layer, looking forpotential layer (area), and to determine the next step of adjustment measures, to achieve thepurpose of stabilizing oil production and controlling water. On the recovery efficiency andrecoverable reserves are analyzed, finally discusses the development suggestions. This is ofimportant significance to the block to achieve efficient development, production.