第38卷第1期 2017年2月
文章编号：1001-3873(2017)01-0119-08
新疆石油地质
XINJIANG PETROLEUM GEOLOGY DOI:10.7657/XJPG20170121
Vol.38.No.1 Feb.2017
西加拿大盆地二白斑组地球化学特征与页岩油
有利勘探区筛选
林候飞"，黄海平12，蒋文龙”，马立"，柴程玉
（1.中国地质大学能源学院，北京100083；2.卡尔加里大学地球科学系，阿尔伯塔卡尔加里T2N1N4；
3.中国石油新疆油田分公司博士后工作站，新疆克拉玛依834000）
商要：通过对9口井岩心样品岩石热解、气相色谱质谱、有机地球化学和X射线衔衍射分析，探讨了西加拿大盆地二白摘
班组富有机质页岩的地球化学特征以及页岩油有利勘探区。饱和烃色谱质谱分析显示：烃类以短链正构烷烃(nC nCs)为主，aaα20RCm规则留烷占优势，奥利烷相对含量较低，有机质以藻类、浮游生物为主。Pr/Ph受成熟度影响比较小，基本记录了沉积阶役及成岩作用早期的氧化还原环境。二苯并噻分/菲与姥鲛烷/植烷关系显示二白班组沉积环境-岩石相东西方向上存在较大变化，在阿尔伯塔东部为强还原环境，中西部为弱还原环境，在西部还原性增强。另一方面，由于所有实验室热解产物通常含有大量的极性、高分子化合物，使得把性碳算在内的质量平衡模型高估烃源岩的生烃潜量。针对此间期，应用死碳矫正新方法对二白斑组成熟一高成熟烃源岩原始有机碳含量、原始生烃潜量进行恢复，并探讨潜在的页岩油压裂生产有利区，认为除研究区中一西部5口并烃源岩镜质体反射率大于0.5% 外，其余井的残留油均未达到工业开采价值。
关键词：西加拿大盆地；二白斑组；烃源岩；页岩；地球化学特征；页岩油有利区
中图分类号：TE125.6
文献标识码：A
Geochemical Characteristics and Favorable Areas for ShaleProspecting in Second White
SpecksFormation,WesternCanadaBasin
LIN Houfei',HUANG Haiping2, JIANG Wenlong,MA Li', CHAI Chengyu
(1.School of Energy Resources, China University of Geosciences, Beijing 10083, China 2.Department of Geosciences, University of Calgary, T2N 1N4, Calgary, Alberta, Canada; 3.Postdoctoral Center, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China) Abstract: Based on the data analyses of rock pyrolysis, gas chromatographic mass spectrometry(GC-MS), organic geochemistry and X-ray diffraction on core samples from 9 wells, this paper discusses the geochemical characteristics and the favorable areas for shale oil explora-tion. GC-MS analysis of saturated hydrocarbon shows that the hydrocarbon is dominated by short-chain n-alkanes(nC,—nChs)with the pre-dominance of acc20RCn steranes and relatively low content of oleanane, The organic matter is dominated by algae and plankton. Maturity has a little impact on Pr/Ph, which basically records the oxidation and deoxidation environment during deposition and early diagenesis stage, The relationship between dibenzothiophene/phenanthrene and pristane/phytane indicates that the sedimentary environment-lithofa-cies of Second White Specks formation vary largely from east to west. Strong reducing environment occurs in the east of Alberta, weak re-ducing environment in the middle-west and relatively strong reducing environment in the west. On the other hand, the pyrolysis products in the lab usually contain large amount of polar, high-molecular compounds, which results in the over-estimation of hydrocarbon potential ob-tained by mass balance model counting inert carbon. A new method of dead carbon correction is used to reconstruct the original organic car-bon content and original hydrocarbon potential of matured-high matured source rocks in Second White Specks formation. The favorable ar-eas for shale oil production are discussed, and it is concluded that the vitrinite reflectance of the source rocks is greater than O0.5 in 5 wells of the middle-western part of the study area and the residual oil in other wells can't meet the commercial production requirement.
Keywords: Western Canada basin; Second White Specks formation; source rock; shale; geochemical characteristic; favorable shale oil area
西加拿大盆地上白垩统科罗拉多群二白斑组（(SecondWhiteSpecks）富有机质页岩对应赛诺曼末期全球缺氧事件及最大洪泛面，具备非常好的油气潜力"，并为上覆砂岩层Vinking，Cardium和BellyRiver 贡献了大量油气。
收稿日期：2016-08-08
修订日期：2016-11-07
基金项目：国家自然科学基金（41273062；41573035）
二白斑组烃源岩在西加拿大盆地的成熟度变化非常大，从阿尔伯塔东部至阿尔伯塔西部从未成熟到高成熟。笔者试图通过生物标志物、全岩地球化学、有机地球化学等的系统分析，探讨二白斑组干酪根类型、有机质来源、沉积古环境特征、成熟度和油气潜力
作者简介：林候飞（1989-），男，福建福州人，硕士研究生，有机地球化学，（Tel)18558607710(E-mail)2106140016@cugb.edu.cn 万方数据