非常规致密砂岩油藏渗流特征研究

摘要

近年来国内致密砂岩油藏在水平井、体积压裂与“工厂化”作业等技术的支持下，得到了有效的开发利用，但对致密砂岩储层孔隙结构特征的研究和致密砂岩油藏水驱油效率影响因素的研究均是当前所面临的难点问题。因此本文以回归分析、灰色关联分析与灰色聚类分析为理论依据，以压汞实验、油水相对渗透率实验和水驱油实验为手段，完成对致密砂岩储层孔隙结构特征和水驱油效率的研究。基于压汞实验，结合灰色关联分析与灰色聚类分析完成对储层孔隙结构特征的研究，并得到以下结论：在所涉及的孔隙结构特征参数中，结构系数与储层孔、渗物性相关性最好;新定义了多孔介质微观孔隙结构复杂参数。利用新的多孔介质微观孔隙结构复杂参数，根据多孔介质的宏观参数，渗透率和孔隙度，即可评价多孔介质的微观孔隙结构复杂性。 该参数有很强的工程意义,与水驱油时的见水时间有很好的关系获得灰色孔隙结构综合因子，并建立灰色孔隙结构综合评价模型。结合孔隙结构研究结果、油水相对渗透率实验与水驱油实验结果，完成对水驱油效率的相关研究。结果表明，注入倍数、储层物性和孔隙结构特征与水驱油效率存在一定相关性，但均不明显。其中本文所提出的灰色孔隙结构因子在与特征结构系数的比较中，灰色孔隙结构因子与水驱油效率表现出了较好的相关性。致密砂岩油藏的水驱油效率稍低于中高渗油藏的水驱油效率，最大的差异是致密砂岩油藏水驱油驱替压差大很多，驱替速度小很多，驱替时间长很多。

目录

声明

FIGURES

LIST OF TABLE

NOMENCLATURE

Chapter1:Introduction

1.1Research Status at Home and Abroad

1.2Definition ofunconventional tight oil reservoirs

1.3Study on micro-pore structure of reservoir

1.4Study on Micro-pore Structure Characterization of Reservoir

1.5Study on Characterization of Micro-pore Structure of Reservoir

1.6Study onunconventional oil

1.7 Research content and technical route

Chapter2: Study on poreStructure Characteristics of Tight Sandstone Reservoirs

2.1Reservoir profile

2.2 Natural Geography Overview

2.3 Regional Geological Survey

2.5 Casting sheet characteristics

2.6 Scanning Electron Microscope Features

2.7 Reservoir physical properties

2.8 Reservoir pore structure characteristics

2.9 Capillary Pressure Curve Morphological Characteristics

2.10 Quantitative characteristics of capillary pressure curve

2.11 Relationship between reservoir physical properties and pore structure

2.12ProbabilisticRegression analysis

2.13Anew method for characterizing the microscopic pore structure of porous media.

2.14Gray relational analysis

2.15Absolute correlation analysis

2.16results and analysis

2.17Chapter summary

Chapter3: Comprehensive evaluation of reservoir pore structure

3.1 Gray Correlation Clustering Analysis

3.2Gray correlation cluster analysis steps

3.3 Calculation results and analysis

3.4 Analysis ofreservoir pore structure characteristics

3.5 Advantage analysis

3.6 Advantage analysis results

3.7 Reservoir pore structure comprehensive evaluation factor

3.8Comparisonsand Analysis of Gray Synthetic Factors

3.9Study on the Correlation between Gray Synthetic Factors and Other Pore Structure Parameters

3.10 Gray Pore Structure Comprehensive Evaluation Model

3.11 Summary of this chapter

Chapter4: Study on Water Displacement Efficiency

4.1Study on reservoir seepage characteristics

4.2Oil-water relative permeability curve characteristics.

4.3Experimental results and analysis

4.4 Effect of reservoir physical properties on water flooding efficiency

4.5Effect of reservoir pore structure on water flooding efficiency

4.6Gray complete factor and characteristic structural coefficient

4.7Summary of this chapter

Conclusion

致谢

参考文献