Research On The Seperate Zone Production Test Of East 16-2 Block In FuYu Oilfield

Comprehesive development of FuYu Oilfield was carried out in 1970.Two times of overall adjustments had been made 1970 to 2000.The annual output of oil has maintained more than 10 million tons for many years.But in 2002,the annual output of oil was only 65×104t,and the recovery porcent was 25%.The composite water cut was upto 89percent.Amining at the problems such as poor status,low zonal injection rate,unsuitable ground network and gathering and transportation system,the third comprehensive adjustment was made in FuYu oilfield..After adjustment,The annual output of crude oil increased from 60.9 X 104t in 2003 to more than 100×104t at 2007.Good economic and social benefits have been achieved.The petroleum reserves of Yangdachengzi Formation is in large proportiom in FuYu oilfield.Under development mode of cobining zone production,the Block reveals obvious interlayer and planar inconsistencies.It is difficulty to produce steadily,the proper&timely adjustment for the oil reservoir is our first target.Based on the various geologic formation,experimental,geophysical and dynamic data,adopted by the methods of static prediction with dynamic analysis,Oil reservoir has been quantitatively key researched on the remaining oil distribution with the goal of evaluation,which aims to improve the recovery and economic efficiency and to provide the direct&efficient guide for the further development..This article focus on the issues as following:(1)Based on the subdivision of subzones,we focus on the configuration of internal architecture of single sand bofy in meandering river reservoirs.With data of cores,dense well log and production performance,we systematically study the hierarchical interfaces,lithofacices combinations and spatial distribution and assemblage in paper.The results show that,the single point bar sandbody of meandering river reservoirs in the YangDachengzi Formation deposited in an environment with weak hydrodynamic force is controlled by two hierarchical sedmentary interfaces.the horizontal scale varies greatly.Influenced by lateral-accreted mudsones of point bars and injection-production strategies,the remaining oil is mainly distributed in point bars,isolated and cutting-pilling sandbodies,which lays the foundation for the further development.(2)According to the architecture of single sand bofy,the water driving infill adjust was carried out for remaining potential oil.Based on the producer-injector related of wells group readjusting,some new wells should be drilled.The comprehensive treatment of confined reservoir,add perforated zone and profile control of the old wells and the low effective well,and to combine the producer-injector relation and changing fluid flow direction will be able to increase injecting water swept volume and elevate displace pressure gradient to develop remained oil.(3)After well pattern regrouped adjusted in the East16-2 Block in Fuyu oilfield,the water driving recovery was strenfthened.The water-drive recovery effiency has been risen moethan 3%.