黄沙坨地区火山岩成藏条件分析
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摘要
应用地震、钻井、岩心和分析化验等资料对黄沙坨地区火山岩的生、储、盖等成藏条件进行了研究 ,以便为下一步勘探提供理论指导。该区烃源岩主要为沙三段的暗色泥岩 ,具有分布广、厚度大、干酪根类型好、演化程度高等特点 ;火山岩储层上下及西北侧都有生油岩 ;火山岩储层岩性为粗面岩 ,孔隙结构复杂 ,储集空间以裂缝为主 ;储层分布受北东向断层控制 ;本区成藏条件优越 ,油藏类型为断块油气藏 ,油气藏的形成主要受构造、岩性双重控制 ,其中岩性是基础 ,构造是关键 ;界西断层西侧是有利的含油气区带。
Reservoir forming conditions such as source reservoir caprock of volcanics in Huangshatuo area had been studied through analysis of seismic, drilling, core and assay data, in order to provide theoretical guide for next step exploration. Major source rock of this area was melanocratic mudstone of Sha 3 formation, which was widely distributed, thick, of good kerogen type, and highly mature in evolution. Source rocks could be found above, below, and on the northwest side of the volcanic reservoir. The reservoir lithology was trachyte, pore structure was complex, and main reservoir space was fractures. Reservoir distribution was dominated by a fault in north east direction. Reservoir forming conditions were superior in this area, and this reservoir belonged to faulted block reservoir. The forming of the reservoir was mainly determined by structure and lithology these two factors, among which, lithology was a basic one and structure was a critical one. The western side of Jiexi fault was a favorable oil and gas bearing zone.
Reservoir forming conditions such as source reservoir caprock of volcanics in Huangshatuo area had been studied through analysis of seismic, drilling, core and assay data, in order to provide theoretical guide for next step exploration. Major source rock of this area was melanocratic mudstone of Sha 3 formation, which was widely distributed, thick, of good kerogen type, and highly mature in evolution. Source rocks could be found above, below, and on the northwest side of the volcanic reservoir. The reservoir lithology was trachyte, pore structure was complex, and main reservoir space was fractures. Reservoir distribution was dominated by a fault in north east direction. Reservoir forming conditions were superior in this area, and this reservoir belonged to faulted block reservoir. The forming of the reservoir was mainly determined by structure and lithology these two factors, among which, lithology was a basic one and structure was a critical one. The western side of Jiexi fault was a favorable oil and gas bearing zone.
引文
[1]赵澄林,孟卫工,等辽河盆地火山岩与油气[M ]北京:石油工业出版社,1999
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