摘要
临南油田主要含油层系为沙河街组 ,属三角洲沉积。三角洲前缘亚相内的储集层孔隙结构较均质 ,驱油效率与岩石物性具有一致性。三角洲平原亚相内的储集层孔隙结构非均质性较强 ,驱油效率与岩石物性之间相关性不好 ,且反映出负相关的统计特征。研究表明 ,临南油田影响驱油效率的主要因素是孔隙结构的非均质性。当孔隙结构较均质且物性好时 ,驱油效率高 ,而当孔隙结构非均质性强时 ,即使渗透率高 ,驱油效率也低。并从地质特征及渗流理论等方面对上述现象给予了定量表征。图 2参 16(蔡忠摘 )
As case study in Linnan oil field, the relationship between pore structure and displacement efficiency is revealed. The main oil-bearing series is in Shahejie Formation, which belongs to delta sedimentary facies. Generally, reservoirs in delta front have relatively homogeneous pore structure and displacement efficiency is coincident with pertrophysics. Reservoirs in delta plain have not homogeneous pore structure and displacement efficiency is not coincident with pertrophysics, while they are in negative correlation with each other. So the main factor that controls displacement efficiency is the pore structure heterogeneity. If the pore structure is homogeneous and pertrophysics is high, the displacement efficiency is great. If the heterogeneity of pore structure is strong, the displacement efficiency is less, even if the permeability is great. In this paper, above result is stated by the geological characteristics and a theoretical derivation of percolation flow through porous media.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2000年第6期45-46,49,共3页
Petroleum Exploration and Development
关键词
临南油田
储集层
孔隙结构
驱油效率
退汞效率
Pore structure, Oil displacement efficiency, Linnan oil field, Sedimentary microfacies.
