期刊文献+

A油田低电阻率油层的机理研究 被引量:43

Investigation on mechanism of low-resistivity formation of A Oilfield
下载PDF
导出
摘要 对A油田低电阻率油层岩心常规和特殊的实验结果表明 ,该油田的低电阻率油层主要有 3个影响因素 :①储层中粘土矿物蒙脱石和伊蒙混层的高阳离子交换量直接导致了电阻率的降低 ;②储层中大量微孔隙的存在导致了高的束缚水饱和度 ,也影响了储层的电阻率 ;③微量黄铁矿的存在使储层电阻率降低。储层的孔隙度为 15 0 %~ 2 8 2 %,但是渗透率较低 ,一般小于 0 0 3 μm2 。储层的阳离子交换量较高 ,孔隙度指数仅为 0 5 3 0 ,而岩性系数a为 6 3 63。电阻增大率与含水饱和度在双对数坐标中存在明显的非线性关系 ,且饱和度指数值仅为 1 0 1~ 1 10。经阳离子交换量校正后的饱和度指数值明显增大为 1 5 6~ 1 65。利用CT扫描和扫描电镜 (SEM )分析有助于研究岩石内部的微观结构。 The results of the conventional and special experiment on the parameters such as porosity,permeability,capillary pressure,wettability,grain size of cores got from low-resistivity formations of A Oilfield were analyzed.The low-resistivity beds in this oilfield were mainly controlled by some factors including high cation exchange capacity of smectite or mixed illite-smectite,high irreducible water saturation in micro?-porosity system,existence of trace pyrite.The porosities of conductive beds ranged from 15.0 percent to 28.2 percent,and the permeability values were less than 0 03μm 2.Although porosity exponent was only 0 530,the lithologic constanta was 6 363.The relationship between resistivity index and water saturation showed a non-liner pattern in dual-logarithm coordinate.The saturation exponent ranged from 1 01 to 1 10.The saturation exponents corrected by cation exchange capcity ranged from 1 56 to 1 65.The CT scanning technique and SEM are useful to determinate the microstructure of rocks and the distribution of pores and minerals.
出处 《石油学报》 EI CAS CSCD 北大核心 2004年第2期69-73,共5页 Acta Petrolei Sinica
基金 中国石油天然气集团公司"九五"科技攻关项目 (97 0 5 0 6 0 3)部分成果
关键词 低电阻率油层 影响因素 孔隙度 渗透率 毛细管压力 扫描电镜 计算机层析扫描 low-resistivity formation influencing factors porosity permeability capillary pressure scanning electron microscope CT scanning
  • 相关文献

参考文献8

  • 1陈学义,魏斌,陈艳,刘荣.辽河油田滩海地区低阻油层成因及其精细解释[J].测井技术,2000,24(1):55-59. 被引量:52
  • 2毛志强,谭廷栋,林纯增,王青.完全含水多孔岩石电学性质及其孔隙结构实验研究[J].石油学报,1997,18(3):51-55. 被引量:22
  • 3Zemanek J. Low-resistivity hydrocarbon-bearing sand reservoirs[C]. SPE 15713,1987:1 - 10.
  • 4Zoltan Barlai. The electric conductivity of clayeysilty sand-stones in the comwell-B. R. model[J]. The Log Analyst,1985,26(2):14-20.
  • 5Paul F, Worthington, Nadla pallatt. Effect of variable saturation exponent on the evaluation of hydrocarbon saturation [J]. SPEFE, 1992,7(4) :331-336.
  • 6Hassoun T H, Zainalabedin K, Minh C C. Hydrocarbon detection in low-contrast resistivity pay zones, capillary pressure and ROS (residual oil saturation) determination withNMR logging in Saudi Arabia[C]. 10^th SPE meddle east oil show conf. , 1999 : 10-18.
  • 7Sneider R M. Production of low resistivity, low contrastreservoirs, offshore gulf of Mexico Basin [C]. 42nd Annu Gcags (AAPG) & 39^th Sepm Gulf Coast Sect MTGTRANS, 1992 : 73-88.
  • 8孙建孟,陈钢花,杨玉征,赵文杰,金秀珍.低阻油气层评价方法[J].石油学报,1998,19(3):83-88. 被引量:131

二级参考文献9

共引文献188

同被引文献390

引证文献43

二级引证文献307

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部