Study On The Adaptability Of Profile Control Technology In The X Infill Area

Aiming at the complex development situation of X Southwest District encryption encryption adjustment and measures of the adjustment of the same stage,the methods of reservoir engineering,study the measures to adjust the production decline rate,water cut rising rate variation index,analyzed the calculation method of measure effect,establishes the evaluation index measures,reasonable calculation of old wells and infill wells measures of oil increment and precipitation.Through the comparison between different encryption profile wells group measures,starting from the water shutoff mechanism,according to the laboratory experiment and field test results of reservoir geological factors,development factors,technological factors such as injection profile control results,study the correlation of the various influencing factors and measures of effect analysis by grey correlation to determine the important factors influencing the effectiveness of the block measures,evaluation of the profile control system performance,process parameters and reservoir adaptability.The results of the study show that,X southwest region in recent years,during the encryption encryption adjustment and adjustment measures,production increases,water content decreased,both encryption adjustment by the increase in the number of oil wells,there are measures to adjust the stimulation effect,so the research measures to consider the influence of infill wells.After the block encryption and the adjustment of the measures,the output has a trend of accelerated decline,and the water content is also accelerated.Therefore,further measures should be taken to improve the effect of water flooding.From 2011 to 2013 according to the encryption measures effect calculation results of32 well groups of water shutoff,6 measures of increasing oil well group precipitation effect,cumulative single well stimulation group than 1500t;18 wells measures stimulation effect is good,the average single well group measures of cumulative oil 873t;at the same time,there are 8 wells measures stimulation effect is not obvious,the single well group measures of cumulative oil is less than 100 t,this kind of wells need to further optimize the injection profile control system and process parameters,improve the effect of measures.Factors affecting the plugging effect of reservoir geological factors,development factors,process factors into three categories,X encryption area measures well group in the same block and the contiguous distribution,similar geological conditions for the development of measures,mainly by the effect of injection system and injection processparameters influence factors of injection is the decisive factor in the effect of measures the.According to the comparison block of each well group blocked the effect of profile control measures of water diversion,the whole "Polymer Weak Gel + powder particles and strong gel system is more suitable for the area,including the injection wells group application of" weak gel + urea formaldehyde resin "effect is good;the statistical results of mine also shows that the increase of the injection rate and dry agent can effective measures to improve the effect of well group effect of different measures of encryption area are to further increase the injection amount and improve the effectiveness of measures for stem dose.The formation of a set of ultra-low permeability reservoir water plugging profile evaluation index evaluation method,the optimization of the amount of injection and injection profile control methods for the evaluation of oilfield measures to provide technical support.