摘要
四川盆地北缘中奥陶统宝塔组（O2bt）发育一套厚度在35m左右的灰岩，岩性、岩相稳定，具网纹构造，网纹宽度多在0．5～15mm之间，可被泥质、粉砂质、沥青等充填。通过深入探讨网纹构造成因及其对油气输导产生的作用，认为网纹构造是受生物扰动及构造活动因素影响在同生一准同生阶段深水沉积环境下的产物，作为上志留统龙马溪组（Stlm）生成油气的运移通道，网纹构造在油气运移成藏过程中起到关键作用。
A set of limestones with the thickness about 35m were developed in Ordovician Baota Formation in the northern margin of Sichuan Basin,their lithologic properties and lithofacies were stable,there existed reticulate structures with the width of 0.5~15mm,they would be filled by clay,silty sand and asphalt.The genesis of reticulate structure and its effect on oil and gas transportation were deeply studied.It is considered that the reticulate structure is a product induced in deep water environment by the influence of bio-disturbance and structural movement at syn-penecontemporaneous stage.As the passage of oil and gas migration in Longmaxi Formation,the reticulate structure plays a critical role in hydrocarbon migration and accumulation.
出处
《石油天然气学报》
CAS
CSCD
2013年第11期31-34,75,共5页
Journal of Oil and Gas Technology
基金
国家科技重大专项(2011ZX05005-003-003)
关键词
网纹构造
油气运移输导
宝塔组
奥陶系
四川盆地北缘
reticulate structure
hydrocarbon migration and transportation
Longmaxi Formation
Baota Formation
Ordo-vician
northern margin of Sichuan Basin
