Research On Well Spacing Adaptability Of Low-medium Permeability Conglomerate Reservoir

Well network is a medium that connected to the underground reservoir and ground,the adaptability between well spacing and reservoir plays a very important role in development quality.Currently,researches about reasonable well spacing for sandstone reservoir is relatively mature,but for the research of conglomerate reservoir is not yet fully,Especially in the low-to-moderate permeability conglomerate reservoirs,The early well spacing density is very high already,Restricted by economic benefit,Encryption adjustment scope is small.Therefore,carry out adaptability research in the low-to-moderate permeability conglomerate reservoirs.So well pattern in low permeable conglomerate reservoir adaptability research,Screening of the master control factors influencing the reasonable well spacing,Analysising the internal relationship between reasonable well spacing and the main control factors,has important significance to effectively develop low-to-moderate permeability conglomerate reservoirsThis paper researches the particularity of conglomerate reservoir firstly.On this basis,by using mathematical statistics,contrastive analysis,reservoir engineering,numerical simulation method etc.From the reservoir development effect evaluation,analyzing empirical and theoretical recovery formulas,and reservoir dynamic,reservoir characteristic models etc,finding out the main controlling factor of reasonable well spacing.Using flooding unit that has one injector and one producer,deduced varying section B-L equation,Combined with the new model for predicting water cut,First derive the recovery degree model of conglomerate reservoir.Using the fuzzy mathematics comprehensive evaluation method,screened the reasonable well pattern well spacing evaluation indexes,calculated the reasonable well pattern well spacing main controlling factors' s weight in different water cut stage in different reservoir conditions,and return the relation between reasonable well spacing and main controlling factors.Combined with the reservoir engineering methods for calculation of well spacing density,we formed reasonable well pattern and well spacing evaluation system of conglomerate reservoir.And compiled the multi-factor reasonable well pattern well spacing evaluation software.Finally,the evaluation system are generalized to other blocks,prove that it has good applicability.