| Pubei Oilfield three fault block Pu 80-63 Block is located in the middle part of third-level Putaohua Structure of Daqing Placanticline southern second-level tectonic zone in Songliao Basin central depression.The east and west sides are separated by a north south sealing fault and the south side is separated by a east west sealing fault.The structure is in general spreading in north south direction,it is a fault-block structure which is high in the west and low in the east.The three Pubei Oilfield faults start to be developed since 1979,it has been to extra high water cut development stage after 30 years’ water flooding development.However,the block development practice shows that remaining oil enriched area still exists near the fault affected by structure,reservoir heterogeneity and well control level under this condition of extra high water cut.Therefore,this paper proposes extended-reach directional well for exploration of remaining oil near the fault to improve the development effect for remaining oil area near the fault.This paper determines the horizon and the fault spatial distribution of Pu 80-63 Block through the log-seismic fine structural interpretation.On this basis,the 3d geological model and numerical model is established.The reserves and production history matching is studied.Meanwhile,study the remaining oil distribution law to determine the enrichment regularity of the remaining oil near the fault.Combine the fault distribution rule,remaining oil enrichment regularity,safety confirmation and well trajectory feasibility analysis to optimize the extended-reach directional well spacing parameters.At last,use the numerical simulation method to predict the well spacing scheme,the prediction results show that this program improve the development of the block significantly,enhances the reserves near the fault and increases the production of this block.It has significant actual sense to the development and acquaintance for Pubei Oilfield three fault block Pu 80-63 Block,it also provides guidance for the oilfield exploration and provides basis for extended-reach directional well spacing scheme optimization. |
