昆北地区厚层砂砾岩储层质量主控因素及“甜点”识别

发布时间：2018-06-15 18:31

本文选题：砂砾岩 + 储层质量　；参考：《特种油气藏》2017年04期

【摘要】：昆北油田切12区块第三系下干柴沟组沉积时期砂砾岩储层厚度大,内部砂体多期叠置,非均质性极强。对影响储层质量的主控因素认识不清导致了油藏动用状况和生产效果不佳。基于取心井岩心观察,并结合薄片鉴定、压汞分析、核磁共振及物性等资料,从岩石学、物性及孔隙结构方面分析厚层块状砂砾岩的储层特征及储层质量主控因素,建立了切12区块砂砾岩"甜点"储层识别标准。研究表明:切12区块第三系下干柴沟组储层质量受岩石粒度分选、泥质体积分数、成岩作用等主控因素影响。根据岩性、物性指数、排驱压力、日产液能力等参数建立"甜点"储层识别标准,并提出寻找油井"甜点"储层段补孔、注水井"甜点"储层水窜段封堵调剖等油藏开发调整措施,为厚层块状砂砾岩油藏提高采收率提供有力的技术支持。该研究方法对其他类型的储层质量主控因素研究有一定适用性。
[Abstract]:In the Tertiary Lower Ganchaigou formation of Lower Ganchaigou formation in Block 12 of Kunbei Oilfield, the thickness of sandy gravel reservoir is large, the internal sand body is superimposed in many stages, and the heterogeneity is very strong. Unclear understanding of the main control factors affecting reservoir quality leads to poor reservoir production conditions and production results. Based on the core observation of coring wells, combined with the data of sheet identification, mercury injection analysis, nuclear magnetic resonance (NMR) and physical properties, the reservoir characteristics and reservoir quality control factors of thick layer massive conglomerate are analyzed from the aspects of petrology, physical properties and pore structure. In this paper, the criteria for identifying sand and gravel reservoir in block 12 are established. The results show that the reservoir quality of Lower Ganchaigou formation of Tertiary system in Block 12 is affected by the main controlling factors such as rock granularity separation, mudstone volume fraction, diagenesis and so on. According to the parameters such as lithology, physical property index, displacement pressure, daily liquid production capacity and so on, the identification standard of "dessert" reservoir is established, and the finding of filling hole in oil well "dessert" reservoir is put forward. The measures of reservoir development adjustment such as plugging and profile control in water channeling section of water injection well provide strong technical support for enhancing recovery factor of thick layer massive sandy gravel reservoir. The method is applicable to other types of reservoir quality control factors.
【作者单位】：中国石油勘探开发研究院;中国石油青海油田分公司;中国石油大学(北京);
【基金】：中国石油科技重大专项“低/超低渗透油田有效开发关键技术研究”(2016B-1201)
【分类号】：P618.13;TE311

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