致密油层沉积富集模式与勘探开发成效分析——以松辽盆地北部扶余油层为例  

Sedimentary Enrichment Mode and Effect Analysis of Exploration and Development:A case study of Fuyu reservoir tight oil in northern Songliao Basin

作　　者：蒙启安[1,2] 赵波 陈树民[1] 林铁锋 周永炳[1,2] 乔卫[1] MENG QiAn;ZHAO Bo;CHEN ShuMin;LIN TieFeng;ZHOU YongBing;QIAO Wei(Exploration and Development Research Institute,Daqing Oilfield Co.Ltd.,Daqing,Heilongjiang 163712,China;Heilongjiang Key Laboratory of Tight Oil and Shale Oil Accumulating Research,Daqing,Heilongjiang 163712,China)

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]黑龙江省致密油和泥岩油成藏研究重点实验室,黑龙江大庆163712

出　　处：《沉积学报》2021年第1期112-125,共14页Acta Sedimentologica Sinica

基　　金：国家科技重大专项(2016ZX05046-006-002)。

摘　　要：以松辽盆地北部扶余油层致密油层为例,论述致密油沉积富集模式及勘探开发成效。针对扶余油层致密砂岩油藏纵向小层多、层间跨度大,平面砂体错叠分布、单层厚度薄、连续性差、非均质性强等特点,应用丰富的钻井、三维地震资料进行开发试验区精细地质解剖,提出了扶余油层小层级叠置型致密河道砂体发育模式及叠置砂体预测技术,以期为致密油地质及工程双“甜点”的规模区提供科学依据。结果表明,松辽盆地北部扶余油层发育3种叠置类型砂体,即:主力层河道、主力层薄层河道和薄层分流河道型,深化了前期河道砂体控制致密油富集的宏观认识。黏滞介质叠前时间偏移技术,能够提高成像效果的垂向分辨率,可实现FI、FII油层组的垂向高分辨率解释。利用高分辨率地震成像及Z反演技术,提高了3~5 m河道砂岩储层预测能力,很好地刻画了叠置砂体平面展布和纵向位置,有效指导了松辽盆地北部扶余油层陆相致密油勘探与开发井位部署。针对不同叠置砂体,选取相应开发技术,最大限度提高致密油动用率。大庆油田通过多年的“甜点”区的地质深化认识和砂体识别及开采技术攻关,在勘探和开发上均取得很好的成效。Taking the Fuyu reservoir in northern Songliao Basin as an example,this paper discusses the sedimentary enrichment mode and exploration and development effect for tight oil.The characteristics of the tight sandstone reservoir in the Fuyu oil layer(e.g.,many longitudinal small layers,large interlayer span,plane sand body staggered distribution,thin single layer thickness,poor continuity and strong heterogeneity),the fine geological anatomy of the development test area was investigated using abundant drilling and three-dimensional seismic data.The development characteristics of the small-level stacked dense channel sandbody in the Fuyu oil layer,and a prediction technology for the stacked sandbodies,are proposed.This provides a scientific basis for large-scale geology and engineering of multiple "sweet spots" in tight oil.The results show that there are three types of superimposed sandbodies developed in the Fuyu oil layer:the main channel,the main thin channel,and the thin distributary channel.The pre-stack time migration technology applied to a viscoelastic medium achieved high-resolution interpretation of the thin layers in the FⅠ and FⅡ reservoir groups,and improved the vertical resolution of imaging.High-resolution seismic imaging and Zinversion technology improves the ability to predict 3-5 m channel sandstone reservoirs.The plane distribution and vertical position of the superimposed sandbodies are clearly described,which effectively guides well location for exploration and development of terrestrial tight oil in the Fuyu reservoir.The development technology may be selected depending on the differences between the superimposed sandbodies and maximize the production rate of tight oil.Daqing Oilfield has achieved good exploration and development results over many years of developing greater geological understanding,sandbody identification and exploration technology.

关 键 词：致密油 沉积富集模式 甜点识别技术 成效分析 松辽盆地北部 

分 类 号：P618.13[天文地球—矿床学]