Research On The Development Adjustment Scheme In Tanjiaying-bei Area,Ansai Oilfield

The multi-layered sandstone reservoirs in the continental facies have serious heterogeneity,high crude oil viscosity,low water injection recovery and recovery efficiency.After the reservoir enters the high water cut period,the remaining oil is “overall highly dispersed and locally relatively enriched”.Pattern,after long-term water injection scouring,parameters such as reservoir physical properties,pore structure,wettability,and seepage characteristics have changed to some extent.For the multi-layered sandstone reservoirs in the northern part of Tanjiaying,after entering the high water cut development phase,the percolation characteristics of various types of reservoirs change significantly,the remaining oil distribution is highly scattered,the liquid-oil ratio rises sharply,and it becomes increasingly difficult to control water cuts and decrease.This article makes more detailed descriptions of the reservoir in the study area than before,including detailed work on the prediction accuracy of inter-well sand-mudstone interlayers,identification of various muddy interlayers,location prediction of dominant channels of water flow,and fracture distribution loss ratios to form a more complete The underground understanding system provides reliable and effective data support for later adjustment.After finding out the relative enrichment areas of remaining oil and realizing the existing development problems that are specific to the main stratum,in view of the contradictions that affect the development effect existing in the plane,between the stratums,and within the stratum,the understanding of these three aspects is refined.For the well patterns in the remaining oil enrichment area,measures should be taken to gradually adjust the well patterns,such as well patterns,plugging,and water plugging,which are the main means of regulation and flooding,in order to stabilize oil,control water,and increase precipitation.Improve reservoir recovery.According to the actual situation of the Tanjiaying North District oilfield development,a number of related single wells and single wells are adopted in the low-water-residue oil-rich areas,high-water-bearing areas,and unexploited areas for the existing plane,interlayer,and intralayer development conflicts in the development zone In the grid and small block wellnetwork,the policy of adjusting and driving includes the improvement of well network,rolling and expanding,and water blocking and profile control.This set of schemes adopts the feedback method of formulating and implementing the test scheme after comparison,and the field practice feedback effect shows better.