大庆油田北三区西部井网加密的实践和认识

Practice and Understanding of the Infilling Patterns in the Western Part of Third Block in Northern A rea in Daqing Oilfield

(大庆油田有限责任公司勘探开发研究院)

Exploration and D eve lopment
Institute, Daqing Oilfie ld Co. L td. , CNPC, Daqing
163712, China

Th is pape r summ arizes the understanding o f the in filling
pattern of Be isanx iASP flooding test area. The PI1􀀁4 laye r of
the test a rea is the fluv ial􀀁delta deposition and the wa ter􀀁
flooded s ituation is seve re and non􀀁un ifo rm. The wa ter􀀁
flooded situation of each sed im entary un it is relevan t. To the
developm ent o f the layer and the system of in jection􀀁
production, the dev elopment of the sandbody de term ines the
consistency o f south􀀁north be lt in w aterflooded th ickness, the
w aterflooded ex tent o f the w estern part is h igher than that of
the east part. The layers are mu lti 􀀁
segm ent w ate rflooded
ve rtica lly and the part that is w aterflooded seriously is m ain ly
centra lized in the bottom of each sedim entary unit. There are
six kinds of residua l o il in the test a rea: the residua l o il
re ta ined at the peak of the channe,l the residual o il at the
m atching be lt of the channe ,l the residual o il d ispersed
locally at the channe,l the residua l o il shelte red from the
abandoned channe,l the residua l o il at the crevasse channe,l
the residua l o il at the th in inte r􀀁channe l sands. The
understand ing o f the wa terflooding is a lso conc luded after
dr illing the in fill w e lls. Th is study lays a foundation for the
ASP flood ing.