288断块砾岩油藏注水过程中储层损害机理研究

Study on Formation Damage Mechanism of Fault
Block 288 of Conglomerate Reservo ir inW aterflooding

王自力1 唐洪明1 孟祥燕2 王春华1 白 蓉1

Wang Zili, Tang Hongming,
Meng Xiangyan et al.

1 西南石油大学油气藏地质及开发工程国家重点实验室, 四川成都610500; 2 新疆油田分公司采油二厂, 新疆克拉玛依834008

( State K ey Labora tory of O il and Gas
Reservoir Geo logy and Exploitation, Southw estPetroleum
Institute, Chengdu 610500, China ),

The fau lt b lock 288 be long s to the reservoir w ith low
porosity, low perm eab ility and poo r physica l property. Som e
w e lls had the phenomenon tha t much wa ter w as injected and
m ore difficulties w ere found in the pro cess o f w aterflood ing
W ith the use of m any m a ture techniquse such as reservo ir
rock analyses, physical property de tection and sensib ility
experim enta l eva luation, the ma in reservo ir dam age factors o f
fau lt block 288 we re stud ied. The results show that wa ter
sesitiv ity, veloc ity sens itiv ity and low pe rm eab ility o f the
form ation in fau lt block 288 are the inte rnal factors dam ag ing
form ation . The serious supe rscale bacter ium in in jection we l,l
low sa linity in injected wa ter and unreasonab le salin ity are the
ex terior facto rs . For the purpose o f so lv ing the problem,
prevention m easures techn iques a re deve loped for improv ing
the w ater abso rb ing ability in heavy wa ter sensitiv ity
reservo irs, the absorption ab ility to the in jecto rs can be raised
for ensur ing the stab le w ater injection in the o ilfield.