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鄂尔多斯盆地南部延长组有效烃源岩
邓南涛^1,2,张枝焕^1,2,鲍志东^1,2,王付斌³,梁全胜⁴,李文浩^1,2,陆骋³,赵双丰^1,2,罗梦姣^1,2
(1.中国石油大学地球科学学院,北京 102249;2.中国石油大学油气资源与探测国家重点实验室,北京 102249;3.中国石油化工股份有限公司华北分公司,河南郑州 450006;4.陕西延长石油(集团)有限责任公司研究院,陕西　西安　710075)

摘要:

在烃源岩和原油生物标志物特征精细剖析、类型划分与对比的基础上,确定鄂尔多斯盆地南部地区延长组有效烃源岩主要为长7油页岩和长7暗色泥岩,结合烃源岩的生烃潜力和测井响应特征,建立有效烃源岩的生物标志物参数、常规地球化学评价参数、测井电性参数三级识别标志,即8β(H)-升补身烷/8β(H)-补身烷<2,w(TOC)>1.6％,S₁₊S₂>4 mg/g,IH>170 mg/g,GR>120 API,Δt>260 μs/m,RT>15 Ω·m,CNL>25％,并根据地化参数与电性参数之间的相关性,采用多元回归的方法建立w(TOC)及IH的测井计算公式,从而实现从有限岩心的地球化学信息到全区全井段测井信息的衔接。

关键词: 鄂尔多斯盆地南部生物标志物地球化学特征油源对比有效烃源岩识别标志

DOI：10.3969/j.issn.1673-5005.2013.02.023

分类号::P 618

基金项目:国家重大专项(2011ZX05002-001-003); 中国石化科研专项(G13KJ-11-ZS-QT-ZJ-0005)

Geochemical features and identification marks for efficient source rocks of Yanchang formation in southern Ordos Basin

DENG Nan-tao ^1,2, ZHANG Zhi-huan ^1,2, BAO Zhi-dong^1,2, WANG Fu-bin ³, LIANG Quan-sheng⁴, LI Wen-hao ^1,2, LU Chen³, ZHAO Shuang-feng ^1,2, LUO Meng-jiao ^1,2

(1.College of Geoscience in China University of Petroleum, Beijing 102249, China;2.State Key Laboratory of Petroleum Resources and Prospecting in China University of Petroleum, Beijing 102249,China;3.China Petroleum and Chemical Company Limited, north China branch, Zhenzhou 450006, China;4.Research Institute of Shanxi Yanchang Petroleum(Group) Company Limited, Xi 'an 710075, China)

Abstract:

Based on the analysis of the precise biomarker characteristics, type classifications and comparison of crude oil and source rocks, the effective source rocks of Yanchang formation in southern Erdos Basin were considered to be oil shale and mudstone in Chang 7. The identification mark of biomarker-normal geochemical evaluation-log electrical parameters in Yanchang formation of upper Triassic in southern Erdos Basin was established according to the geochemical characteristics and logging characteristics. The parameters are as follows:8β(H)-homodrimane/8β(H)-drimanes<2, w(TOC)>1.6％, S₁₊S₂>4 mg/g, IH>170 mg/g, GR>120 API, Δt>260 μs/m, RT>15 Ω·m, CNL>27％. Logging calculation formula of w(TOC) and IH was established according to the correlation of geochemical parameters and electrical ones, which has realized the cohesion of geochemical information of limited core to the whole interval logging information.

Key words: southern Ordos Basin biomarkers geochemical characteristics oil-source correlation effective hydrocarbon source rocks identification marks