克拉玛依油田中拐-五八区佳木河组火山岩储集层特征  

The Volcanic Reservoir Characteristics of Jamuhe Formation in Zhongguai-District 5-(8) Area in Karamay Oilfield

作　　者：朱国华 蒋宜勤[2] 李娴静 

机构地区：[1]中国石油杭州地质研究院,杭州310023 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆石油地质》2008年第4期445-447,543,共4页Xinjiang Petroleum Geology

摘　　要：克拉玛依油田中拐-五八区佳木河组火山岩储集层岩类复杂,有火山碎屑岩、熔岩等;火山碎屑岩主要为凝灰岩、沉凝灰岩和火山角砾岩;熔岩类主要为安山岩和玄武岩。火山碎屑岩以晶屑、岩屑内溶蚀孔和火山灰脱玻化孔为主,主要发育在凝灰岩和火山角砾岩中;熔岩以半充填或未充填气孔和冷凝收缩缝为主,主要发育在安山岩和流纹岩中。火山岩储集性质总体差-很差,熔岩和火山碎屑岩中由于绿泥石、沸石和方解石等矿物的充填,破坏了在冷却成岩阶段中形成的原生储集空间,后期虽然受地表水的淋滤和地下酸性流体溶蚀,在一定程度上改善了储集层质量,但是整体溶蚀作用不强且不普遍,主要发生在与不整合面有关的佳木河组上亚组中酸性火山岩中。后期裂缝对火山岩的储集性能的改造作用较强。The volcanic reservoir of Jiamuhe formation in Zhongguai-District 5-（8） area in Karamay oilfield is characterized by developed pyroclastic rocks and lava. The pyroclastic rocks dominated by crystal debris,lithic intra-dissolution pore and volcanic ash devitrified pore consist mostly of tuff, tuffite and volcanic breccia; the lava dominated by semi-filled or unfilled bubble and condensed shrinkage fissure contains andesite and basalt. In the lava and pyroclastic rocks, the filled chlorite, zeolite and cacite destroyed the primary reservoir spaces formed in cooling diagenetic stage. Such a case was still not improved due to weak and non-universal dissolution in neutral-acidic volcanic rocks of upper sub-formation of Jamuhe formation, despite the fact that late surface water leaching and in situ acidic fluid dissolution allowed the reservoir quality to be improved in some degree. It is believed that late fractures could have good effects on improvement of the reservoir quality of such volcanic rocks.

关 键 词：准噶尔盆地 二叠系 佳木河组 火山岩 储集层 

分 类 号：TE112.222[石油与天然气工程—油气勘探]