Research And Application Of Secondary Development Of Xinglongtai Oil Reservoir In Jin 22 Block

The Xinglongtai oil layer of Jin 22 block is composed of a set of medium and thick sandstone,sand gravel and fine conglomerate intercalated with different thickness of deep gray,grayish green mudstone and argillaceous siltstone.Integrated contact with overlying sand.The thickness is 150 ~ 200 m.According to Xing I top funnel formation mudstone,Xing II top calcium shale and II formation of variegated mudstone at the bottom of Xing iconic features,the cycle of comparison of hierarchical control method,the Xinglongtai reservoir is divided into 3 formations,9 sandstone group,18 small layer.Most oil wells are not drilled in Xing?.Analysis of production characteristics of Jin 22 block:(1)the production capacity of the high position of the structure of oil well high,flowing period long,flowing period of cumulative oil production is high,and the long period of water free production;(2)the rising velocity of water cut after water is different,and the rising rate of water cut is different in different tectonic positions;(3)after the oil well is in water,the water content in the middle and low water cut stage rises rapidly,and the water cut rises slowly in the high water cut stage,and the recoverable reserves can only be produced in the period of no water and low water cut,only recoverable reserves 42.34%(4)in the period of high water cut,the production capacity is large,and the liquid production index rises.Jin 22 block of Xinglongtai oil reservoir has been developed for many years,because of the poor physical properties of the reservoir,high shale content,the formation of sand serious,frequent operation of oil and water wells caused most of the bad,broken block on the verge of production.To this end,we reunderstand the geological basis,carried out the secondary development research,reconstruction of the injection production well network,combined with two or three oil production in accordance with the five point method of well spacing of 170 meters,the successful deployment of the new wells.In order to ensure the two development effect of water flooded layer identification standard was established according to the logging data,can be good enough to tap the potential of remaining oil,to find out the potential layer,and establish the perforation patterns,optimize the perforation layer at the same time,the formation of sand control system,realized the two development blocks,has the reference significance to guide the further development of the block or other similar reservoirs.