大兴安岭以西弧形断陷盆地群油气地质特点与含油气性

发布时间：2018-06-03 19:10

本文选题：弧形断陷盆地群 + 油气形成条件　；参考：《大庆石油地质与开发》2017年02期

【摘要】：大兴安岭以西分布一系列断陷盆地,已经发现数十个油田。从断陷盆地群的构造演化与受控机制出发分析各断陷的分布特点和类型,在分析成藏要素及其组合类型基础上研究油气成藏模式和分布特点。研究结果表明:大兴安岭以西断陷盆地群在平面上展现为3个带状弧形,断陷有单断、双断和组合式3种样式;大多数断陷具有中等—好烃源岩,储集层以岩屑长石砂岩、岩屑砂岩为主,另发育变质岩、火山岩等储层,除了常见的构造、岩性油气藏外,断陷中还发育变质岩、火山岩油藏;断陷成藏期在晚白垩世及古近纪,富烃洼槽控制油气时空分布,特殊储层具有形成大油田的有利条件,存在多个小而肥的凹槽,且稠油具有一定的勘探潜力。具相似含油气系统的断陷是今后的勘探目标。
[Abstract]:Dozens of oil fields have been discovered in a series of faulted basins to the west of the Daxing'an Mountains. Based on the structural evolution and controlled mechanism of the faulted basin group, the distribution characteristics and types of each fault depression are analyzed, and the oil and gas accumulation model and distribution characteristics are studied on the basis of analyzing the reservoir forming elements and their combination types. The results show that the basin group in the west of Daxing'an Mountains shows three zonal arcs on the plane, with single fault, double fault and combined type, and most of them have medium-good hydrocarbon source rocks, and the reservoir is lithic feldspathic sandstone, and the reservoir is composed of lithic feldspathitic sandstone and lithic feldspar sandstone. In addition to the common structure and lithologic reservoirs, metamorphic rocks and volcanic rock reservoirs are also developed in the faulted sag, where the late Cretaceous and Paleogene are the late Cretaceous and Paleogene periods. Hydrocarbon rich troughs control the spatial and temporal distribution of oil and gas. Special reservoirs have favorable conditions for forming large oil fields, there are many small and fat grooves, and heavy oil has a certain exploration potential. Fault subsidence with similar oil and gas bearing system is the exploration target in the future.
【作者单位】：东北石油大学地球科学学院;大庆油田有限责任公司勘探开发研究院;
【基金】：国家自然科学基金项目“杂积岩的成因、成岩和成储机制研究”(4157020959) “十三五”国家科技重大专项“致密油成藏主控因素与富集规律研究”(2016ZX05046-001) 国土资源部中国地质调查局项目“松辽盆地以北以东中小型断陷盆地群油气地质条件研究”(DD20160165)
【分类号】：P618.13

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