鄂尔多斯盆地长7致密储层可动流体分布特征

发布时间：2018-01-17 22:23

本文关键词：鄂尔多斯盆地长7致密储层可动流体分布特征　出处：《天然气地球科学》2017年01期 　论文类型：期刊论文

【摘要】：鄂尔多斯盆地长7致密油资源丰富,储层地面空气渗透率小于0.3×10-3μm2,物性较差,可动流体饱和度是该类储层评价的关键参数之一。采用离心实验和核磁共振T2谱分析技术相结合的方法,开展了鄂尔多斯盆地长7致密储层可动流体分布特征研究,研究结果表明:一是长7致密储层单相可动水饱和度平均为39.40%,其中微米级(大于1μm)、亚微米级(0.1~1.0μm)及纳米级(小于0.1μm)可动水饱和度分别为2.2%、25.67%及11.52%;岩心束缚水下可动油含量平均为26.07%,其中微米级(大于1μm)、亚微米级(0.1~1.0μm)及纳米级(小于0.1μm)可动油含量分别为0.79%、9.48%及15.81%;可动流体主要分布在亚微米和纳米孔喉中。二是随着岩心渗透率的增大,可动水和可动油饱和度都增大;但不同喉道半径控制的可动流体饱和度增加幅度不同,喉道半径为0.10~0.5μm的可动流体饱和度随着岩心渗透率的增大都增大,且增幅最大,其次是喉道半径处于0.5~1.0μm的可动流体,喉道半径大于1.0μm的可动流体饱和度增幅最小,而喉道半径小于0.1μm的可动流体饱和度相对含量降低的趋势比较明显。
[Abstract]:Chang 7 in Ordos Basin is rich in dense oil resources, and its surface air permeability is less than 0.3 脳 10 ~ (-3) 渭 m ~ (2), and its physical properties are poor. Movable fluid saturation is one of the key parameters for reservoir evaluation. The characteristics of movable fluid distribution in Chang7 tight reservoir in Ordos Basin are studied. The results show that the single phase movable water saturation of Chang7 tight reservoir is 39.40% on average. Micrometer (> 1 渭 m), submicron (0.1 渭 m) and nanometer (less than 0.1 渭 m) movable water saturation were 2.20.67% and 11.52%, respectively. The average content of movable oil in core bound underwater is 26.07, in which micron (more than 1 渭 m). The contents of mobile oil in sub-micron scale (0.1 渭 m) and nanometer scale (less than 0.1 渭 m) were 0.79% and 15.81%, respectively. The movable fluid mainly distributes in sub-micron and nanometer pore throat. The second one is that the movable water and movable oil saturation increase with the increase of core permeability. However, the increasing amplitude of movable fluid saturation with different throat radius is different. The movable fluid saturation with throat radius of 0.10 ~ 0.5 渭 m increases with the increase of core permeability, and the increase is the largest. The second is movable fluid whose throat radius is 0.5 ~ 1.0 渭 m, and the smallest increase in saturation of movable fluid with throat radius greater than 1.0 渭 m. However, the relative content of movable fluid with throat radius less than 0.1 渭 m decreases obviously.
【作者单位】：中国石油长庆油田分公司勘探开发研究院;低渗透油气田勘探开发国家工程实验室;
【基金】：中国石油集团公司重大专项“鄂尔多斯盆地致密油勘探开发关键技术研究”(编号:2011E-2602) 国家科技重大专项“大型油气田及煤层气开发”课题四“超低渗透油藏有效开采技术”(编号:2011ZX05013-004)联合资助
【分类号】：P618.13
【正文快照】： (1):26-31.[雷启鸿,成良丙,王冲,等.鄂尔多斯盆地长7致密储层可动流体分布特征[J].天然气地球科学,2017,28(1):26-31.]0引言鄂尔多斯盆地长7致密油资源丰富,储层地面空气渗透率小于0.3×10-3μm2,地层压力系数介于0.6~0.8之间,具有储层物性差和地层压力低的特征。主要分为2大

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