Study On Classification And Development Effect Evaluation Method Of Reservoirs In Songfangtun Oilfield

Water drive oilfield development effect evaluation is to understand the dynamic oilfielddevelopment,to clear the direction of the tap,to make adjustment measures the importantmeans. SongFangTun oilfield water flooding development has entered into the period stage ofcurrent high water cut,exploitation will be more and more difficult,how to reasonable andcorrect evaluation of oilfield development effect,to enhance SongFangTun oilfield miningpotential,to deepen the understanding of the law on the reservoir development,to guideoilfield more reasonable and effective development,has become a problem to be reckonedwith.According to the structural characteristics and geological characteristics to fine dividesthe block unit;And through the points fault block statistical development blocks the effectivethickness of the development status of tree,oil and water,sand body development status,porosity,permeability and oil saturation,static index,according to the fuzzy mathematiccomprehensive evaluation method,will SongFangTun oilfield has divided the40block toadjust for33,kind of block17,2kinds of block10,three types of block6.On the basis of static classification,this paper studies the different categories blockdevelopment effect and the influence factors,after the initial qualitative analysis,establish thewater flooding development effect evaluation index system of primaries,mainly include thefollowing ten aspects:water flooding reserves control degree, oil recovery, natural decline rateof intense,moisture content,water flooding index,carry water rate and recovery degree,pressure remains level,water flooding reserves producing degree,oil production speed. Furtherto get the correlation analysis get water flooding development effect evaluation index systemof good or bad for moisture content, recovery,water flooding control degree,pressure remainslevel,carry water rate,oil extraction,speed.On the index system to evaluate the effect ofdevelopment respectively,and finally to different category block comprehensive evaluationand adjustment measures proposed analysis.Because of most of sandbodies distribution for narrow strip, SongFangTun oilfield kindof block’s well nets are not easy to control,water flooding control degree is relatively low,the2kind and the3kind of block water drive control degree higher than the first kind of waterflooding control degree. As a unit to perfect injection-production system of single sand body --using pointlike water injection,as the same time cooperating with oil Wells work system ofcomprehensive adjustment methods,to improve the kind of block water flooding controldegree.