Fuyu Oil Field West13Team Block Development Research And Application

Fuyu oilfield is located in Songliao Basin III Fuyu Hua Zi Jing terrace structure ofcentral depression belt, is much high arch anticline controlled by faults in an axial directionwas not obvious. Many faults, multiple, high reservoir buried shallow, multiple layers andthin: Fuyu (spring four sections divided into4sand groups,13layers), Yangdachengzi(divided into4sand groups,8layers), the difference of physical properties of reservoir,vertical heterogeneity, lateral lithology variation large, leading to the development of the oilfield development, increasing the difficulty of.But with the "two development" works steadily, oil production rate, still overallrecovery degree is low, the development index larger room. Oilfield degression rate, watercut rises up, flat, liquid production profile conflicts. One is the use of inadequate reserves,low producing degree of reserves. Have to use rate of oil production,1.8tons of reserves islow (oil production rate of0.60%, recovery22%(38%)); two is the small layer of low degree,difficult to meet the demand deficiency of effective development, layered reservoirunderstanding degree. The single sand body and layered injection production dynamicunderstanding of the law is not clear, the remaining oil distribution and the rule ofwaterflooding cognition is not enough; three is the interlayer contradictions have becomeincreasingly prominent, water flooding efficiency is not high. Commingled injection andproduction of serious interlayer interference, some water injection wells appear ineffectiveinjection cycle, injection production system is not perfect, can not form high-efficient waterflooding, seriously affect the water flooding development effect.Therefore,"West13team in Fuyu oilfield development technology research andpromotion" block project, is aimed at oil field has been awarded the "two development" onthe basis of valuable experience, West13team efficient water injection technology, selectionand West13team well network structure is similar, the water flooding developmentcontradiction X5-8block as the pilot, injection oil intensity, through the determination ofreasonable, proper water level, reasonable management mode of oil well dynamic production control technology, realize the expansion of water flooding swept volume, to improve theeffect of block development pilot, has practical significance and guiding significance.In view of the Fuyu reservoir main reservoir has high recovery, non main reservoirresidual oil accumulation, and the interlayer heterogeneity is strong, weak capacity to exertpressure layer contradiction, studying the anatomy of13West teams in different stage ofwater flooding development effect analysis method, high water injection technology,summarizes the high water flooding swept volume successful practices, the formation of thelater stage of water flooding oil well production control technology policy and on the basis ofsummarizing; in-depth analysis of enlarging swept volume test block development effect indifferent development stage, evaluation stage of water flooding effect and its restrictedfactors, according to efficient water injection technology team of13West, determine thereasonable water injection technology measures and technical index, method. Through theanalysis of the West13team water flooding technology in Fuyu oilfield practice, establishthe linear injection production well pattern, and to determine the technical countermeasuresof reasonable water injection pilot block X5-8block, in order to achieve the purpose ofimproving oil recovery.