松辽盆地北部扶余油层致密油特征及勘探对策  

FUYU TIGHT OIL CHARACTERISTICS AND EXPLORATION COUNTERMEASURES IN NORTH SONGLIAO BASIN

作　　者：蒙启安[1] 白雪峰[1] 梁江平[1] 唐振国[1] 薛涛[1] 彭建亮[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院

出　　处：《大庆石油地质与开发》2014年第5期23-29,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：中石油股份公司科技攻关项目“大庆探区第四次油气资源评价”(2014E-050203)

摘　　要：扶余油层是松辽盆地北部油气勘探主力层系,是一套以青山口组一段为源岩和以泉头组三段、四段河流—三角洲相致密砂体为储层的上生下储型成藏组合.扶余油层的致密油具有源岩条件好、储集体类型多样、源储匹配关系好的特点,但单一砂体规模小、连续性差、储层物性差、孔喉结构复杂.油气沿广泛分布的通源断裂下排,匹配的断砂疏导体系决定了油气平面及纵向分布.松辽盆地北部中央坳陷区内砂岩厚度大,砂地比适中,易于形成致密油气藏,整体呈现大面积连片含油特征.采用孔隙度与渗透率交会法、含油产状统计法综合确定了扶余油层致密油储层的物性下限及分类标准,进一步明确了致密油的分布规律及勘探对策。Fuyu oil layers are the main serieses of the petroleum exploration reservoirs in North Songliao Basin,which are the ＂upper source-lower reservoir type＂ accumulating assemblages,in detail,the source rock is MemberⅠ of Formation Qingshankou and the reservoirs are Member Ⅲ and Ⅳ fluvial-deltaic tight sandbodies of Quantou Formation.The tight oils in Fuyu Layers are characterized by the superior conditions of source rocks,multiple reservoir types and well-matched source reservoir assemblage,but the scale of the individual sand body is small,the continuity and physical properties are poor,the pore-throat structures are complex.The hydrocarbon migrates downwards along the widely-distributed source-through faults,the matched fault-sandstone transporting and migrating system determines the planar and vertical distributions of the petroleum.The Central Depression in North Songliao Basin is featured by thicker sandstone and moderate sandstone-formation ratio,so it is prone to accumulate tight oil which is widely distributed.By means of porosity-permeability intersection and oil occurrence statistics methods,the limits of the physical properties and sorting standards of Fuyu tight oil reservoirs are determined,and moreover the distribution laws and exploratory countermeasures are further clarified.

关 键 词：松辽盆地北部 扶余油层 致密油 基本特征 勘探对策 

分 类 号：TE122[石油与天然气工程—油气勘探]