致密油藏活性水采油机理

发布时间：2018-01-11 04:16

本文关键词：致密油藏活性水采油机理　出处：《大庆石油地质与开发》2017年05期 　论文类型：期刊论文

【摘要】：注活性水相较于注水有诸多优势,在特低渗、超低渗油藏的实际开发中效果较好,因此可以借鉴到致密油藏的开发上。针对鄂尔多斯盆地X区块致密油储层,选取不同渗透率的岩心进行注水和注活性水驱油物理模拟实验,结合核磁共振技术,分析致密油岩心的微观孔隙结构、可动流体饱和度以及不同渗透率等级岩心的采出程度、残余油分布等。研究表明:大部分致密油油藏的孔隙为亚微米、微纳米孔,可动流体主要赋存于大于1μm的孔隙中;注活性水效果好于常规水驱,注活性水能够有效地动用微纳米孔中的原油;渗透率越低注活性水的驱油效果越明显,对于渗透率低于0.6×10~(-3)μm的致密油藏,建议采用注活性水开发。
[Abstract]:Note the activity of water compared to the water injection has many advantages in low permeability, good super low permeability reservoir in the actual development effect, therefore can be reference to the development of tight reservoir. The Ordos basin X block tight oil reservoir, different permeability core water and living water injection and oil displacement experiments, combined with NMR analysis of micro pore structure of tight oil core, movable fluid saturation and permeability of different grades of core recovery, residual oil distribution. The results show that: the most dense oil reservoir pore for sub micron, micro nano hole, the movable fluid mainly occurs in more than 1 m in the pore water effect; the activity of injection is better than the conventional water flooding, injection of activated water can effectively use the micro nano hole in crude oil; the lower permeability injection active water flooding effect is more obvious, the permeability is lower than 0.6 * 10~ (-3) compact M The reservoir is suggested to be developed by the injection of active water.

【作者单位】：中国科学院大学工程科学学院;中国科学院渗流流体力学研究所;中国石油勘探开发研究院廊坊分院渗流流体力学研究所;中国石油大学胜利学院油气工程学院;
【基金】：国家科技重大专项“低渗—超低渗油藏有效开发关键技术”(2017ZX05013-001)
【分类号】：TE357.6
【正文快照】： 开发研究院廊坊分院渗流流体力学研究所,河北廊坊065007;4.中国石油大学胜利学院油气工程学院,山东东营257061)致密油资源是中国非常规能源的开发热点[1-4]。由于致密油藏渗透率极低、非达西渗流明显,在注水开发时存在启动压力梯度,导致注水难度大、油气产量递减快等问题,需要

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