细粒沉积岩性识别新方法与储集层甜点分析——以渤海湾盆地沧东凹陷孔店组二段为例

发布时间：2018-06-05 14:41

本文选题：细粒沉积 + 岩性识别　；参考：《石油勘探与开发》2017年04期

【摘要】：在渤海湾盆地沧东凹陷古近系孔店组二段500 m系统取心、上千块次薄片鉴定、X射线衍射分析基础上,提出了用声波时差、密度等常规测井资料定量计算细粒沉积矿物含量的简易方法,建立岩性快速识别"绿模式"。通过测井曲线标准化并与X射线衍射分析实测矿物含量定量关系拟合,计算无取心段/井矿物含量,从而进行岩性识别。应用该方法在沧东凹陷孔二段细粒沉积区识别出多个白云岩甜点段和1个砂岩甜点段,实钻均获较高产油流,研究表明,白云岩平面上局部富集、呈带状展布。该方法适用于前三角洲—湖盆中心细粒沉积岩发育区,尤其适用于半深湖—深湖相砂质含量少、以泥-灰云质为主的细粒沉积岩的岩性识别。
[Abstract]:On the basis of the 500m coring system of the second member of the Kongdian formation of Paleogene in Cangdong depression, Bohai Bay Basin, and the identification of thousands of thin slices, the sound wave time difference is proposed. A simple method for quantitative calculation of mineral content in fine grain deposits from conventional logging data such as density is established to establish a "green pattern" for rapid lithology recognition. By standardizing the logging curves and fitting the measured mineral contents with the X-ray diffraction analysis, the mineral contents of the no-coring section / well are calculated, and the lithology identification is carried out. This method is used to identify several dolomite desserts and one sandstone desserts in the fine grain sedimentary area of the second member of Kong2 in Cangdong sag. The oil flow in the drilling is relatively high. The results show that the dolomite is locally enriched and distributes in a zonal pattern. This method is suitable for the development of fine-grained sedimentary rocks in the center of the pre-delta-lake basin, especially for the lithologic identification of the fine-grained sedimentary rocks with less sand content in the semi-deep lacustry-deep lacustrine facies and mainly mud-lime-clouded rocks.
【作者单位】：中国石油大港油田公司;中国石油大学(华东);
【基金】：中国石油科技重大专项“大港油区大油气田勘探开发关键技术研究”(2014E-06)
【分类号】：P618.13

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