疏松砂岩油藏提高储层识别方法研究

Study on Improving Reservoir Identification in Unconsolidated Sandstone Reservoir

摘要: 疏松砂岩油藏的储层识别与有效开发是油藏地质学领域的研究热点与难点。本文以吐哈盆地Y油田为例，应用其成熟的开发资料，通过开展岩心归位、曲线环境校正和标准化，优选与岩性相关性较好的补偿中子、补偿密度、声波时差、深探测感应电阻率4个参数，利用主成分分析方法建立了岩性识别图版，划分出了泥岩、粉细砂岩、中细砂岩和含砾砂岩四种岩性判别区间。结合疏松砂岩的岩性和测井曲线特征，建立了疏松砂岩和储层识别图版，精度分别达到90.0%和91.9%。该成果有望在Y油田，以及其他疏松砂岩发育地区的储层精细描述中起到参考作用。

Abstract: The reservoir identification and effective development of unconsolidated sandstone reservoir are the research hotspot and difficulty in the field of reservoir geology. This paper takes Y oilfield in Turpan Hami Basin as an example, applies its mature development data, through core homing, curve environment correction and standardization, four parameters of compensation neutron, compensation density, acoustic time difference and deep exploration induced resistivity with good correlation with lithology are optimized, establishing the lithologic identification chart with the principal component analysis method, four lithologic discrimination intervals of mudstone, siltstone, medium fine sandstone and pebbly sandstone are divided. Combined with the characteristics of lithology and logging curve of unconsolidated sandstone, the identification charts of unconsolidated sandstone and reservoir are established with the accuracy of 90.6% and 91.9% respectively. The results are expected to play a reference role in the fine reservoir description of Y oilfield and other areas with unconsolidated sandstone development.