梁江平,赵波,陈均亮,牛文
LIANG Jiangping,ZHAO Bo,CHEN Junliang,NIU Wen

• 1:大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

松辽盆地北部中浅层油和深层天然气分别来自青山口组一段、青山口组二段下部和沙河子组源岩,是源岩生成的油气经过油气源断裂向每个油气层垂向运移后,再在浮力作用下沿连通的储集体侧向运移的结果。综合断裂系统和烃源岩2个成藏要素,分析了油气分布规律。结果表明:松辽盆地北部发育6类断层,可以划分为2种断裂系统。青山口组下部是优质有效烃源岩,油气主要靠断层的疏导形成中浅层3套含油组合和深部含气组合。在有效烃源岩分布范围内,北西向的Ⅰ和Ⅰ-Ⅱ-Ⅲ型断裂及南北向的Ⅰ-Ⅱ型断裂控制深层天然气分布,北西向的Ⅰ-Ⅱ-Ⅲ、Ⅱ和Ⅱ-Ⅲ型断裂控制中浅层石油分布。研究各类断层的分布,对于预测油气分布、指导勘探部署具有重要意义。
The oil in the middle-shallow oil layers and the gas in the deep layers of North Songliao Basin mainly migrate from K_2qn1 and Lower K_2qn2 source rocks and K_1sh source rock, and moreover result from the source faults and then vertically migrate to the petroleum reservoirs and furthermore under the buoyancy, along the connected bodies, laterally migrate and accumulate. Through the integration between the two accumulating factors i. e. the fault systems and hydrocarbon source rocks, the laws of the petroleum distribution have been analyzed. The results indicate that six types of the fault have been developed in North Songliao Basin, and moreover they can summarize into two kinds of the fault systems. Lower Qingshankou Formation is the high-quality effective source rock, the generated hydrocarbon is mainly transported by the transporting faults into the reservoirs and form three sets of oil-bearing combination and deep gas combination. Within the scope of the effective hydrocarbon source rock distribution, NW Type Ⅰ,Ⅰ-Ⅱ-Ⅲ faults and NS Type Ⅰ-Ⅱ faults control the distribution of the deep gas, while NW Type Ⅰ-Ⅱ-Ⅲ,Ⅱand Ⅱ-Ⅲ faults dominate the distribution of the middle-shallow petroleum.The researches on the distributions of various types of the faults possess very important significances to predict the petroleum distribution and guide the exploration arrangement.

关键词(KeyWords)： 断裂系统;油气分布;松辽盆地北部;控制作用
fault system;oil-gas distribution;North Songliao Basin;controlling action

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份公司科技攻关项目“中石油矿权区油气资源评价”之第二课题“大庆油田探区‘十三五’油气资源、经济及环境允许程度评价”(135YQZP-2017-KT02)

作者(Author): 梁江平,赵波,陈均亮,牛文
LIANG Jiangping,ZHAO Bo,CHEN Junliang,NIU Wen

DOI: 10.19597/j.issn.1000-3754.201906064

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