Characteristics and Main Controlling Factors for Lithologic Reservoirs of the Fuyu Oil Layer in the Northern Honggang, Songliao Basin
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摘要: 通过对松辽盆地红岗北地区扶余油层岩性油藏类型及其特征研究,总结出该区岩性油藏主要受4种因素控制:(1)断裂是最重要的超压流体优势输导通道;(2)古超压是油气向下运移的输导动力;(3)长期继承性古鼻状构造是油气侧向运聚的优势指向区;(4)以空间成因单砂体为控制因素形成的单一岩性圈闭是最基本的控油与聚油单元,垂向多个小层、平面多支单砂体形成的圈闭以及非圈闭在空间上复杂叠置是造成油水分布极其复杂的根本原因。这对该区岩性圈闭预测、岩性油藏成藏分析以及对极其复杂的油水分布机理与规律研究提供极为重要的基础,对当前复杂的油气勘探与开发具重要理论意义。Abstract: Through study on types and characteristics of lithologic reservoirs of Fuyu oil layer in the northern Honggang, Songliao Basin, four main controlling factors for lithologic reservoirs are: (1) Fault is the most important predominant transporting pathway of overpressure fluid. (2) Overpressure is power of petroleum migrating down. (3) Longterm inherited noselike structure is predominant direction of petroleum lateral migration. (4) Genetic monosandbody traps are minim oilcontrolling units and oilaccumulating units which are controlled by vertical layer and planar sedimentary microfacies. Spatially complicated superposition of vertical multilayer and planar multibranch monosandbody traps and mistraps is essential reason of the complicated distribution of oil and water. It provides a vital foundation for prediction of lithologic traps, analysis of lithologic reservoir forming and study on complicated distribution of oil and water. The model is of great significance to complex exploration and development of lithologic reservoirs.
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Key words:
- lithologic reservoirs /
- monosandbody /
- Fuyu oil layer /
- Songliao Basin /
- oilcontrolling unit
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