摘要
针对柴达木盆地七个泉油田E3^1～N2^2储层油气识别的难点，在占有大量生产资料的基础上，应用深感应声波时差交汇的方法，按层位、分岩性确定油层识别标准。成果认为：1）N2^2砾岩AC≥249μs／m、ILD≥7．9Ωm，砂岩AC≥255μs／m、ILD≥5Ω．m；2）E3^2-E3^1中上部粗砂岩及砾岩AC≥238μs／m、ILD≥4．5Ωm；细粉砂岩AC≥250μs／m、ILD≥4Ω．m；3）E3^1底砾岩AC≥237μs／m、ILD≥5．5Ω．m。据此标准解释出油层2000多个，符合率在85％以上。这一标准及结论对油田生产有重要意义。
In view of the recognition difficult of the petroleum in in E3^1、E3^2、N2^2reservoirs in the Qigequan Field, Chaidamu Basin, based on a great quantity of production information, according to the different lithology ,confirmed the recognition criteria of oil layer in different reservoirs by using the convergence between ILd and AC . The results as follows： 1） In N2^2 reservoir, the value of AC in eonglomerate is greater than or equal to 249μs/m, the value of ILD is greater than or equal to 7. 9Ωm,the value of AC in sand is greater than or equal to 255pμs/m, the value of ILD is greater than or equal to 5.0Ωm; 2） in E3^2 E3^1reservoir, the value of AC in the grit and conglomerate is greater than or equal to 239μs/m, the value of ILD is greater than or equal to 4. 5Ωm,the value of AC in siltstone--packsand is greater than or equal to 250μs/m, the value of ILD is greater than or equal to 4.0Ωm; 3）in E3^1 reservoir, the value of AC in basal conglomerate is greater than or equal to 237μs/m, the value of ILD is greater than or equal to 5.5Ωm. According to this recognition criteria, more than 2000 oil layers were confirmed, and the coincidence rate was more than 85%. The recognition criteria and conclusion had important significance for the production of Qigequan Field.
出处
《内蒙古石油化工》
CAS
2007年第1期141-142,共2页
Inner Mongolia Petrochemical Industry
