不同岩相泥页岩生烃能力与含油性特征——以玛湖凹陷风城组玛页1井为例  

Hydrocarbon generation capacity and oil-bearing properties of shale with different lithofacies:a case study of well Maye 1 in Fengcheng Formation,Mahu Sag

作　　者：何晋译 冷筠滢 李志明[1,2,3] 何文军 刘得光[4] 杨森[4] 李楚雄[1,2,3] HE Jinyi;LENG Junying;LI Zhiming;HE Wenjun;LIU Deguang;YANG Sen;LI Chuxiong(Wuxi Research Institute of Petroleum Geology,SINOPEC,Wuxi,Jiangsu 214126,China;State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development,Wuxi,Jiangsu 214126,China;Key Laboralory of Petroleum Accumulaion Mechanisms,SINOPEC,Wuxi,Jiangsu 214126,China;Research Institute of Petroleum Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China)

机构地区：[1]中国石化石油勘探开发研究院无锡石油地质研究所,江苏无锡214126 [2]页岩油气富集机理与高效开发全国重点实验室,江苏无锡214126 [3]中国石化油气成藏重点实验室,江苏无锡214126 [4]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：《东北石油大学学报》2025年第1期1-17,I0001,I0002,共19页Journal of Northeast Petroleum University

基　　金：国家自然科学基金项目(42090022);中国石化勘探开发研究院重点课题(YK-2023-18)。

摘　　要：以玛湖凹陷玛页1井风城组岩心为研究对象,采用全岩X线衍射、薄片观察、岩石热解和多温阶热解等方法,在岩相划分的基础上,分析不同岩相泥页岩生烃能力与含油性特征。结果表明:玛湖凹陷风城组主要发育块状长英质泥岩、块状云质泥岩、纹层状长英质泥岩、纹层状灰质泥岩、纹层状云质泥岩、树根状泥岩和雪花状泥岩7类岩相;纹层状长英质泥岩、纹层状灰质泥岩、纹层状云质泥岩、树根状泥岩和雪花状泥岩为中等—好烃源岩,块状云质泥岩为差—中等烃源岩,块状长英质泥岩烃源岩品质差。纹层状长英质泥岩、纹层状云质泥岩、树根状泥岩和雪花状泥岩含油性和可动性好,为页岩油甜点岩相;生烃能力、排烃和外来烃运移是影响泥岩含油性与可动性的主要因素。玛页1井风城组深度在4625.0~4635.0、4665.0~4685.0和4730.0~4770.0 m之间发育优势岩相,为页岩油勘探开发的有利层段。该结果为玛湖凹陷风城组页岩油下一步勘探部署与有效开发提供依据。The study on hydrocarbon generation capacity and oil-bearing properties of shale with different lithofacies is of great significance to the evaluation of high-quality source rocks.Mudstone samples from well Maye 1,Fengcheng Formation,Mahu Sag,were selected to determine the hydrocarbon generation capacity and oil-bearing properties of shale with different lithofacies through X-ray diffraction,thin section observation,rock pyrolysis and multi-temperature pyrolysis.The results show that mudstones of Fengcheng Formation in Mahu Sag can be divided into 7 types of lithofacies:massive felsic mudstone,massive dolomitic mudstone,laminated felsic mudstone,laminated calcareous mudstone,laminated dolomitic mudstone,tree-root shaped mudstone and snowflake mudstone.The laminated felsic mudstone,laminated calcareous mudstone,laminated dolomitic mudstone,tree-root shaped mudstone and snowflake mudstone are medium-good source rocks.The source rock quality of massive dolomitic mudstone is poor-medium source rock.The massive felsic mudstone is poor source rock.The laminated felsic mudstone,laminated dolomitic mudstone,tree-root shaped mudstone and snowflake mudstone are the sweet facies of shale oil with high oil content and good mobility.Hydrocarbon generation capacity,hydrocarbon expulsion and hydrocarbon migration are the main factors affecting the oil content of mudstones.The depth intervals of 4625.04635.0,4665.04685.0 and 4730.04770.0 m of well Maye 1 are favorable for shale oil exploration and development,which dominant lithofacies developed at.The research results can provide theoretical basis and technical support for further exploration and development of the shale oil in the Fengcheng Formation,Mahu Sag.

关 键 词：玛湖凹陷 风城组 玛页1井 页岩油 岩相 生烃能力 含油性 

分 类 号：TE122.2[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]