王凤启,姜琦,李雪,王剑,刘朋坤,郭亚杰,白志强
WANG Fengqi,JIANG Qi,LI Xue,WANG Jian,LIU Pengkun,GUO Yajie,BAI Zhiqiang

• 1:中国石油大庆油田有限责任公司勘探开发研究院
• 2:中国石油大庆油田有限责任公司勘探事业部
• 3:中国石油大庆油田有限责任公司第四采油厂

摘要(Abstract)：

传统微幅度构造识别方法主要用于描述小层顶部形态变化特征，未充分考虑沉积微相对微幅度构造的控制作用，导致其难以准确表征砂体内部局部变化特征，影响剩余油富集区的精准定位，制约水聚两驱的精准挖潜。针对上述问题，以萨北开发区北三排东葡Ⅰ组油层为例，采用小波分频与高精度速度场建模方法提升时深转换精度，结合井震协同的砂顶趋势面分析及沉积微相约束成图技术，系统开展砂体顶面微幅度构造识别研究。结果表明：该方法可精确刻画砂体顶部微幅度构造形态特征，有效突出砂体局部高点和低点，用于萨北油田4口正向微幅度井的驱油方案优化，实现单井平均累计增油4 303.76 t。研究成果为大庆油田的水聚两驱精准剩余油挖潜提供了可靠的技术支撑。
The traditional micro-amplitude structure identification method is mainly used to describe morphological variation characteristics of sublayer tops, and less consideration on the controlling of sedimentary micro-facies on micro-amplitude structure makes it difficult to accurately characterize the local variation characteristics within sand bodies, affecting the precise targeting of remaining-oil enrichment areas and restricting the accurate potential tapping by water-polymer flooding. Aiming at the aboved problems, taking reservoirs of eastern PⅠ Formation in Bei 3 rows of Sabei development zone as the example, methods of wavelet frequency division and high-precision velocity field modeling are used to improve time-depth conversion accuracy. Combining with well-seismic collaborative trend surface analysis of sand body tops and sedimentary micro-facies constrained mapping technique, systematical study of micro-amplitude structure identification of sand body top surface is conducted. The results show that this method accurately characterizes the morphological characteristics of micro-amplitude structure at sand body tops, effectively highlighting local highs and lows of sand bodies. Based on the optimization of oil displacement scheme for 4 positive micro-amplitude wells in Sabei development zone, the average cumulative incremental oil of single well is up to 4 303.76 tons. The research provides reliable technical support for accurate tapping of remaining oil by water-polymer flooding in Daqing Oilfield.

关键词(KeyWords)： 微幅度构造;沉积微相;井震结合;砂体刻画;小波变换;地震反演
micro-amplitude structure;sedimentary micro-facies;well-seismic integration;sand body characterization;wavelet transform;seismic inversion

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份公司重大科技专项“中高渗油田特高含水期大幅度提高采收率技术研究”(2023ZZ22)

作者(Author): 王凤启,姜琦,李雪,王剑,刘朋坤,郭亚杰,白志强
WANG Fengqi,JIANG Qi,LI Xue,WANG Jian,LIU Pengkun,GUO Yajie,BAI Zhiqiang

DOI: 10.19597/J.ISSN.1000-3754.202504060

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