构造和沉积对页岩油富集的控制作用——以松辽盆地中央坳陷区青一段为例  

Controlling effects of the structure and deposition on the shale oil enrichment:Taking Formation qn1 in the Central Depression of Songliao Basin as an instance

作　　者：付晓飞 石海东 蒙启安 柳波[2,3] 梁江平 贺君玲 冉清昌[3,4] 巩磊 贾茹 FU Xiaofei;SHI Haidong;MENG Qi’an;LIU Bo;LIANG Jiangping;HE Junling;RAN Qingchang;GONG Lei;JIA Ru(Heilongjiang Institute of Technology,Haerbin 150050,China;Institute of Unconventional Oil&Gas,Northeast Petroleum University,Daqing 163318,China;Heilongjiang Provincial Key Laboratory of Shale Oil&Tight Oil Accumulation,Daqing 163712,China;Exploration and Development Research Institute of Daqing Oilfield Co Ltd,Daqing 163712,China;PetroChina Jilin Oilfield Company,Songyuan 138000,China)

机构地区：[1]黑龙江工程学院,黑龙江哈尔滨150050 [2]东北石油大学非常规油气研究院,黑龙江大庆163318 [3]黑龙江省致密油和泥岩油成藏研究重点实验室,黑龙江大庆163712 [4]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [5]吉林油田公司勘探公司,吉林松原138000

出　　处：《大庆石油地质与开发》2020年第3期56-71,共16页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家“十三五”科技重大专项“断裂带内部构型及剩余油分布研究”(2016zx05054);国家自然科学基金面上项目“陆相页岩油储层孔隙结构非均质性成因及其对烃类赋存相态的影响”(41972156);黑龙江省自然科学研究团队项目“复杂断裂带成因机制及断块油气藏有效性综合评价研究”(TD2019D001)。

摘　　要：在前人构造演化史和沉积背景研究基础上,分析松辽盆地青一段页岩油形成的影响因素,建立了构造和沉积对页岩油类型和分布控制模式,为页岩油勘探选区提供依据。针对中央坳陷区3个重点凹陷青一段页岩和泥岩的地球化学、岩石学和岩相、孔隙结构、地层压力等方面,进行了综合分析。研究表明:构造演化影响烃源岩成熟度,控制页岩油的富集;齐家—古龙凹陷、长岭凹陷和三肇凹陷青一段页岩油成藏条件存在差异;齐家—古龙凹陷西部物源区是Ⅰ类页岩油的重要聚集区,北部物源区难以形成规模化的页岩油聚集,长岭凹陷南部的西南保康水系可形成大规模的Ⅱ类页岩油,3个凹陷深湖—半深湖区普遍分布Ⅲ类页岩油;不同凹陷尽管页岩油类型不同,但资源潜力都很大,页岩油是松辽盆地下一步重点勘探领域。Based on the previous studies on the structural evolution history and sedimentary background,the influencing factors on the generation of the shale oil in Formation qn 1 in Songliao Basin were analyzed,and moreover the controlling models of the structure and deposition over the shale oil type and distribution were established,these researches have provided the evidences for the selection of the shale-oil exploration area.In the light of the shale and mudstone geochemistry,petrology and lithofacies,pore structure and formation pressure in Formation qn 1 of three key sags in the Central Depression,the comprehensive analysis was conducted.The studies show that the tectonic evolution affects the maturity of source rock and controls the enrichment of shale oil;there are differences in the conditions of the shale oil accumulation in Formation qn 1 of Qijia-Gulong Sag,Changling Sag and Sanzhao Sag.The western provenance area of Qijia-Gulong Sag is the important reservoir of ClassⅠshale oil,while it is difficult to form a large-scale shale oil accumulation in the northern provenance area,a large-scale ClassⅡshale oil can be accumulated in Southwest Baokang river system in the south of Changling Sag,ClassⅢshale oil is generally distributed in the deep and semi-deep lacustrine facieses of the three sags.Although different sags have different types of the shale oil,they all have a great resources potential.Therefore,the shale oil is the next key exploration field in Songliao Basin.

关 键 词：构造 沉积 断裂 裂缝 页岩油 有机质 岩相 资源潜力 

分 类 号：TE121.1[石油与天然气工程—油气勘探]