摘要：As oil resources continue to be depleted, traditional extraction technologies face significant challenges, and improving remaining oil recovery has become a critical issue in the development of low-permeability oil fields. The study first establishes a stratigraphic framework through a fine stratigraphic correlation of key wells, followed by a comprehensive characterization of the internal arrangement of sand bodies, with a detailed analysis of the distribution of interlayers and the complexity of sand body stacking patterns. Based on field data, including tracer monitoring and water absorption profiles, the distribution of remaining oil is predicted. The results reveal that sandy debris flow deposition plays a key role in the enrichment of remaining oil, particularly considering how its internal structure impacts reservoir connectivity and waterflood efficiency. The sedimentary pattern in the study area is dominated by debris flow deposition, with poor continuity of sand bodies; over 90% of individual sand bodies encountered during horizontal well drilling have a width of less than 60 m. Sand body stacking types are classified into overlapping, splicing, and isolated types, and different stacking types significantly influence reservoir waterflood efficiency and the distribution of remaining oil. The innovation of this study lies not only in the microstructural investigation of sandy debris flow but also in the comprehensive characterization of its strong heterogeneity. By analyzing the internal configuration of sand bodies, sedimentary microfacies, and physical property distributions, this study uncovers how these factors influence the distribution of remaining oil. This approach provides valuable insights for accurately predicting and enhancing remaining oil potential.

关键字：internal configurations of sand bodies; remaining oil prediction; low-permeability reservoirs; enhanced oil recovery; development strategy

ISSN号：2227-9717

卷、期、页：卷13期4

发表日期：2025-03-28

影响因子：0.000000

期刊分区（SCI为中科院分区）：四区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：PROCESSES

参与作者：安小平,杨焕英,万文春,李洪畅,张春晖,陆雪皎

通讯作者：李烨,皮之洋,葛琛琦,姚福裕,包鹏虎,张雨杰,杨兴,张宇杰

第一作者：惠钢

论文类型：期刊论文

论文概要：安小平,李烨,杨焕英,万文春,惠钢,李洪畅,张春晖,陆雪皎,皮之洋,葛琛琦,姚福裕,包鹏虎,张雨杰,杨兴,张宇杰，Study on the Depositional Microfacies and Internal Architecture of Sandy Debris Flows in Low-Permeability Oilfields: Implications for Remaining Oil Recovery in the HeShui Oilfield，PROCESSES，2025，卷13期4

论文题目：Study on the Depositional Microfacies and Internal Architecture of Sandy Debris Flows in Low-Permeability Oilfields: Implications for Remaining Oil Recovery in the HeShui Oilfield