摘要
为明确定边地区浅水三角洲前缘亚相背景下的单砂体展布特征,单砂体横向和纵向间的接触方式,以层序地层学和测井学及沉积学等理论知识为指导,综合沉积微相、砂体展布及测井资料分析等技术手段,对定边油田YGS区块长4+5油藏单砂体进行刻画。研究表明,定边油田YGS区块长4+5油藏中单砂体接触模式主要发育独立型、侧向对接型及切叠型3类;在单砂体3类接触类型细分的6种接触模式中,侧切式、垂向切叠式和侧向切叠式属于连通接触,其他接触类型为不连通或弱连通接触;该区域浅水三角洲前缘水下分流河道单砂体厚度主要介于2~6 m,宽度主要介于200~650 m,河道平均宽厚比为103。理清单砂体空间叠置样式,对识别油水沟通路径和多层系油藏的注水开发具有指导作用。
In order to clarify the distribution characteristics of single sandbodies under the subfacies background of the shallow water delta front in Dingbian area and the contact mode between the single sandbodies in transverse and longitudinal directions,the single sandbodies of Chang4+5 reservoir in YGS block of Dingbian Oilfield were characterized by the guide of theoretical knowledge of sequence stratigraphy,well logging and sedimentology,combine with the data of sedimentary microfacies,sandbody distribution and well logging electrical data of the block.The research shows that the contact modes of single sandbodies in Chang4+5 reservoir in YGS block of Dingbian Oilfield are mainly three types,includes independent,lateral butt and cut layer.The three contact modes of a single sandbody are subdivided into six contact types.Lateral tangential,vertical tangential and lateral tangential belong to connected contacts,while other contact types are disconnected or weakly connected contacts.In the research region,the thickness of single sand bodies in the underwater distributary channel of shallow water delta front is mainly between 2~6 m,the width is mainly between 200~650 m,and the average width-to-thickness ratio of the channel is 103.The identification of spatial stacking patterns in sandbodies is instructional for the recognition of oil-water communication paths and the water injection development of multi-layer reservoirs.
作者
李玮
刘瑛
高涛
付晨阳
王鹏
张亮
张丽媛
刘明军
LI Wei;LIU Ying;GAO Tao;FU Chenyang;WANG Peng;ZHANG Liang;ZHANG Liyuan;LIU Mingjun(Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710075,China)
出处
《非常规油气》
2023年第5期65-74,83,共11页
Unconventional Oil & Gas
基金
陕西省自然科学基金项目“页岩油储层微-纳米孔喉系统量化表征及对可动流体赋存状态控制机理研究”(2022JQ-290)。
