河流- 三角洲储层大孔道形成机理研究

2007年 14卷 第04期
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Macroscopic throats forming mechanism of fluvial
delta reservo ir
白振强
Ba i Zhenqiang
大庆油田有限责任公司勘探开发研究院, 黑龙江大庆163712
Exploration and D eve lopment
Research Institute, Daqing O ilfie ld Corporation Ltd. ,
CNPC, Daqing 163712, China
大孔道是疏松砂岩油藏长期注水冲刷形成的次生高渗透条带, 极易造成注水低效循环。利用高含水和特高含水阶段砂岩油藏储层参数变化规律、河流- 三角洲相沉积体系储集砂体内部的主要非均质特征和高速、长期注水开发方式对形成高渗透带的影响, 分析了影响储层大孔道形成的主要因素。研究表明, 河流- 三角洲储层大孔道形成过程中储层的非均质性是内因, 而注水开发是其形成的外因, 二者共同作用最终导致大孔道的形成。
The m acroscop ic throats is w ide ly spread in wa ter
flooding fields crea ting poor effic iency c ircu la tion o f wa ter
flooding, wh ich m akes it difficult to im prove flood ing
effectiveness. Th is paper ana lyses the macroscopic throats
form ing effects o f reservoir pa ram e ters variation rule at h igh
w ater cut stage, rese rvo ir heterog ene ity characteristics in
larg e fluv ial- de lta depositional sand body and high speed
and long- term water flooding exp lo itation. In the process o f
the m acroscop ic throats fo rm ing o f fluv ia l- delta depositiona l
reservo ir, the m ain factors a re rese rvo ir heterogene ity and
long- term wa ter flood ing explo itation.
河流- 三角洲储层 大孔道 微观结构 非均质性;
fluv ial - delta depositional reservo ir,
macroscopic throats, m icrostructure o f reservo ir, heterogeneity;