文东深层低渗透油藏微观剩余油形成机理研究

Study of Formation Mechanism of Micro Remaining Oil in Low Permeable Reservoir of Third Sect ion of Shahejie Formation in Wendong A rea

( 1 中国地质大学, 北京;2 中原油田分公司勘探开发科学研究院)

Exploration & D eve lopment
Research Institute of Zhongyuan O ilf ield Company,
SINOPEC, Puyang 457001, China

The fo rm ation m echanism and contro lling factor o f
rem aining o il were demonstra ted in this paper through the
reservo ir structure, m icro pore and throat ne tw ork and m icro
d isp lacem ent test. Sa turated w ate r in the rock flow s fast but
uniform ity because o f the deep reservo ir, strong diag enesis,
low perm eab ility and h igh he terogene ity. The dr iv ing pressure
is very low because of the pore structure w ith serious
heterogene ity. The sweep area o f in jected w ate r can ha rdly be
inc reased and near ly no effect on o il d isp lacement effic iency
can be seen when increasing the in jec ted pressure and
ve locity. Bypassing is m a in fo rm of rema in ing o il and
heterogene ity o f the reservo ir po re structure is ma jo r fac to r
tha t affects the o il disp lacem ent effic iency.
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