长岭断陷龙凤山地区断裂与火石岭组火山岩油气运聚关系

龙凤山地区是长岭断陷重要的油气富集区，已发现油气多分布于断裂带附近，探讨断裂与油气运聚的关系具有重要意义。结合地震、测井、岩心、镜下薄片、流体包裹体观察及测温等资料，在断裂静态特征与断裂带结构识别研究基础上，综合分析断面形态、断裂活动特征与油气运聚的关系。研究结果表明，断裂的诱导裂缝带发育大量裂缝，有效地改善火山岩的物性，断裂可作为输导油气的优势运移通道；Ⅰ级断层的"汇聚型"断面形态控制油气主要富集位置；断层活动性与第一期成藏期匹配良好，断裂可作为输导油气的优势通道，后期断裂带裂缝被石英、方解石所充填，断裂对火山岩油气藏主要起封闭作用。 

Relationship between faults and hydrocarbon migration and accumulation in Huoshiling Formation volcanic rocks in Longfengshan area,Changling Fault Depression

The Longfengshan area is an important hydrocarbon enrichment area in the Changling Fault Depression. Most of the oil and gas are distributed near the fault zone. It is of great significance to discuss the relationship between faults and hydrocarbon migration and accumulation. Combined with seismic, logging, core, microscopic thin sections, fluid inclusion observations and temperature measurement data, the relationship between section morphology, fault activity characteristics and hydrocarbon migration and accumulation is comprehensively analyzed on the basis of fault static characteristics and fault zone structure identification. The results show that a large number of fractures are developed in the fault-induced fracture zone, which can effectively improve the physical properties of volcanic rocks, and the fault can be used as the dominant migration channel for hydrocarbons. The "convergent" section shape of the grade Ⅰ fault controls the main enrichment location of hydrocarbons. The fault activity matches well with the first stage of reservoir formation, and faults can be used as a dominant channel for transporting hydrocarbons. In the later stage, the fracture of the fault zone is filled with quartz and calcite, and the fault zone mainly plays a sealing role in the volcanic oil and gas reservoirs.