Recongnition Method On Inefficient Endless Loop Tape Of PuTaoHua Reservoir In XingShuGang Oilfield South Area

Xingnan development area of Daqing Oilfield has developed for decades of years. It has some stages, such as flow production , waterflood development and tertiary oil recovery. Now it has already entered into the later stage of high water cut,the remaining oil distribution is dispersed,and the development is getting more difficult. As the oilfield is developed deeply, injection time prolong, pore structure of vary depositional model reservoir was changed, since existence of ermeability difference within single channel sandstone reservoir, in condition of over a long period waterflooding , injected water advancing along the high permeability of deposit units, and buildup setted fluidway,then, filtrate prevalent channel way of high watery phase fluid is formed(abbreviated"High Capacity Channel"). If it formed, water flushed information displaise strong-water flushed,flooding information displaise high level,we can see from dynamics information: with the increase of pore volume, variation in thickness of water flushed is not increasing essentially, intraformational thickness of water flushed and displacement efficiency raise difficulty,injected water was circulating inefficiently or invalidity over a long period of time,and interfere water entering and oil yielding situation of else interval and else oil layer seriously,then, cost of oil field development is increased, final recovery efficiency of oil will be influenced.Through accurate geology research in horizontal, discriminate deposit microfacies and single sand layer by the development of reservoir nonhomogeneity, drafting height and permeability chorisogram of distinct deposit unit based on identification of single sand layer. In order to awareness the nonhomogeneity in the channel sand, identify the variation and high permeability area, Identified the property of the high capacity channel in horizontal combination of single well.These article research two aspects of the vertical and plain mainly start from logging data and then form the approach to identify high capacity channel using logging data. It includes four aspects of research:First, it has researched the changes of all kinds of logging trace's characteristics and principle after the formation of high capacity channel, has analysed the change rules of reservoir parameters and logging trace with the ircreasing of flooding degree using core well of different time.as the ircreasing of permeability,porosity and water saturation, the shale content declines. Microelectrode specitic decreases, natural potential ircreases, a concept of inefficient endless loop tape is deducted based on above. Second, using the coring well data has established the different area, the different parameter explanation model, and has carried on the parameter fault analysis and the model adjustment; Third, to set up the recognition models and discriminant of the high capacity channel,according to the high capacity channel reservoir bed's all kinds of logging traces and reservoir bed physical property parameters' variation range to ersure the recognition standard; fourthly means of discriminant model practical application's effect analysis and verification, in order to verifies recognition effects ,using the TCR logging and potential method monitor data, multidisciplinary research, dynamic flowline simulation and other datum to verified.