| 王辉,韩冠楠,王飞.河流相单砂体非均质性特征对油水分布及开发的影响——以渤海湾盆地 K油田为例[J].矿产勘查,2026,2(2):282-289 |
| 河流相单砂体非均质性特征对油水分布及开发的影响——以渤海湾盆地 K油田为例 |
| The impact of heterogeneity characteristics of fluvial facies single sand bodies on oil-water distribution and development: A case study of K oilfield in the Bohai Bay Basin |
| 投稿时间：2024-10-28 |
| DOI：10.20008/j.kckc.202602006 |
| 中文关键词: 河流相 非均质性 油水分布 注水开发 剩余油 |
| 英文关键词: fluvial facies heterogeneity oil-water distribution waterflood development remaining oil |
| 基金项目:本文受国家重点研发计划“油/水/固界面浸润调控智能流体提高采收率关键材料与机理研究”(2019YFA0708700)资助。 |
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| 中文摘要: |
| 河流相砂岩是中国东部老油田的主要储集层类型，伴随着开发程度的不断提高，显现出砂体展布特征及连通关系认识不清、油水关系复杂等问题，制约着油田高效开发。本文以 K油田馆陶组为例，运用测井、岩心、分析化验及生产动态资料，明确了河流相单砂体内部结构及其非均质性特征，阐明了非均质性对油水分布、开发过程及剩余状态的影响。研究表明:河流相平面上发育透镜状、条带状、交织状及连片状 4种形态砂体，层间接触关系复杂、物性差异小，层内正韵律及均质韵律发育，曲流河单砂体夹层为平面延伸短的低角度斜列式，辫状河单砂体夹层为平面延伸长的层状。受到河流相单砂体非均质性的影响，平面及纵向上出现油水关系倒置、油水界面不清等异常现象，开发上注入水沿砂体厚度大、物性好的河道砂体底部突进，剩余油分布在物性差及夹层隔挡的区域。研究成果和认识对中国东部老油田的开发实际具有重要的指导意义。 |
| 英文摘要: |
| Fluvious-facies sandstone is the main reservoir type of the old oil fields in eastern China. With thedevelopment degree increasing, problems such as unclear distribution characteristics of sand bodies and connectiv-ity relationship and complex oil-water relationship have emerged, which restrict the efficient development of oilfields. On the basis of logging, core, analysis and dynamic production data, the internal structure and heterogeneityof fluvial single sand body are defined, and the influence of heterogeneity on oil-water distribution, developmentprocess and residual state is expounded. The results show that there are four sandbodies in the fluvial facies: lens-like, banded, interwoven and lamellar. The contact relationship between layers is complex, the difference of physi-cal properties is small, and the positive rhythm and homogeneous rhythm are developed within layers. The meanderriver single sandbody interlayer is low Angle oblique with short plane extension, and the braided river single sand.body interlayer is long plane extension. Due to the heterogeneity of single sand body of riverine phase, abnormalphenomena such as inverted oil-water relationship and unclear oil-water interface appear in plane and longitudinaldirection. Injected water at the development stage breaks out along the bottom of the channel sand body with largesand body thickness and good physical property, and remaining oil is distributed in the area with poor physical prop-erty and interlayer barrier. The above research results and understanding have important guiding significance for theactual development of old oil fields in eastern China. |
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