Introduction With the transformation of the energy structure towards green and low - carbon, petroleum and natural gas resources are increasingly becoming important assets. The Bohai Bay area is one of the largest shale oil resource areas in China, and the evaluation of its reservoir quality is of great significance for future resource development. This paper explores the resource potential of tight oil in this area through the analysis of the geological structure evolution, reservoir - formation mechanisms, and in - situ resources amount of glutenite in Bojiao Sag.
Composition Characteristics and Zonation The glutenite in the Bohai Bay area shows complex and rich structural evolution characteristics, which are mainly formed by the development of fault systems. Cemented columns play an important role in the overall reservoir, and their storage space density is higher than that of water - gap reservoirs, and shows an obvious law of cemented column volume change. Table 1: Overview of Cemented Column Reservoirs in Bojiao Glutenite (m³) Total (t) Gas (m³) Viscous Rock,≥3,000 ≥15,000 ≥2,766,3 m²/ha
The zonation in the area shows that the reservoir space density is relatively high and has obvious cemented column characteristics, which lays a foundation for subsequent research.
Cell Analysis Cell analysis is an effective method for understanding the overall structure and enrichment laws of reservoirs. The results of geological cell analysis of Bojiao glutenite show that the area is mainly composed of several evaluation units, such as the fourth member of Shahejie Formation (including Niushi Island), the middle sub - member of the third member of Shahejie Formation, the upper sub - member of the fourth member of Shahejie Formation, and the tight layer units.
The research shows that the in - situ oil storage amount significantly depends on the distribution of cemented columns in the area.
Result Analysis and Significance Based on the above cell analysis and zonation results, the reservoirs in the Bohai Bay area generally show complex and rich characteristics, but it is still necessary to further clarify the spatial density, cumulative characteristics of cemented columns and their overall impact on the reservoir space volume. Overall, the Bojiao glutenite area can be positioned as a new field for Gas & engineering unified field (GEUF) resource development.
Conclusion Through the combined application of cemented column research and cell analysis methods, the spatial pattern and economic characteristics of Bojiao glutenite tight oil can be more comprehensively revealed. Future research directions include: Conduct more research on cemented columns to deepen the development of the overall reservoir structure. Simultaneously discuss the cemented column analysis and the non - seasonal sequestration time to predict the spatial stability of cemented columns. Deepen the research on the overall regional cemented body spatial density and spatial change rate to improve the overall enrichment laws of the reservoir. This in - depth and multi - dimensional geological research method will lay a solid foundation for the future development in the Bohai Bay area.