二次采油与三次采油结合技术在濮城油田的应用

Application of Combined Secondary and Tertiary Oil Recovery Techniques in Pucheng Oilfield

( 1 西南石油学院 2. 中原油田分公司采油二厂)

 1. Southw est Petroleum Institute,
Chengdu 610500, 2. N o. 2 Oil Production P lant,
Zhongyuan O ilfie ld Company, SINOPEC, Puyang
457001, China

To further ra ise the o il recovery effic iency o f the h igh
tem pera ture and high sa lt reservo irs, the comb ined secondary
and tertiary o il recove ry techniques are app lied in Pucheng
O ilfie ld ( abb rev ia ted to􀀁 2 + 3 􀀁 techn ique im prov ing o il
recovery e fficiency). The􀀁 2+ 3 􀀁 techn ique is lim ited to the
tertiary o il recovery on the basis o f the full profile contro .l
Th is artic le introduces the princ ip le o f the techn ique, the
d ifferen tiated standards o f the full pro file con tro ,l the so lved
prob lem s and the screening of the high􀀁e fficiency o il
d isp lacement ag ents. A t the sam e tim e, the exper imenta l
situation is introduced to the southe rn Pu4 block of the Upper
S2 reservo ir im placem ented the technique. The pro file contro l
w ith three tim es w as carr ied ou t by tak ing hydrochloric ac id 􀀁
w ater g lass, ca lcium chlor ide 􀀁 w ate r g lass, calc ium so il 􀀁
w ater g lass, calc ium so il 􀀁 cem ent and chrom ium ge l as the
profile contro l agents. The o il d isp lacem ent agent s lug and
the flu idity contro l slug we re put into subsequently and the
w ater flood ing was resum ed fina lly.