文留地区油气地质特征及滚动勘探方向

Hydrocarbon Geologic Characteristics and Rolling Exploration Direction in Wenliu Area

对文留地区 4个构造带的地层、构造、生、储、盖及后期保存条件进行了研究 ,指出大断层和油源控制了构造带的油气分布 ,小断层只对构造带内的油气水分布起控制作用 ,而构造背景、沉积体系及生储盖配置关系决定了非构造油气藏的形成和分布。结果导致各构造带的油气富集程度相差悬殊 ,其中文留地堑带油气富集程度最高 ,文西地垒带、文东反向屋脊带次之 ,文西顺向屋脊带最差。指出文留地区滚动勘探潜力在于寻找“墙角”式断块油藏、深层油气藏。

An analysis on conditions of strata, fracture, source reservoir caprock and late preservation of four structural belts in Wenliu area,suggests that the distribution of oil and gas in the structural belts is controlled by large faults and oil sources The formation and distribution of non structural reservoir are determined by the structural background, deposition system and assemblage of source reservoir caprock, thus there is a difference in oil and gas enrichment in structural belts. Oil and gas enrichment degree is the highest in Wenliu graben, the second in Wenxi horst and Wendong antithetic roofing area, the worst in Wenxi consequent roofing area It is pointed out that the rolling exploration direction in the area is to seek the “wall footing” block, deep oil and gas, small block reservoirs and lithologic reservoirs