鄂尔多斯盆地吴起—定边地区延长组下组合油源对比研究

王香增; 任来义; 张丽霞; 贺永红; 杨超; 段昕婷

doi:10.11781/sysydz201304426

鄂尔多斯盆地吴起—定边地区延长组下组合油源对比研究

doi: 10.11781/sysydz201304426

陕西延长石油(集团)有限责任公司研究院, 西安 710065

基金项目: 国家自然科学基金(41172122)项目资助。

详细信息

作者简介:
王香增(1968- ),男,教授级高级工程师,从事油气田开发及油井特种增产技术研究。E-mail:sxycpcwxz@126.com。

中图分类号: TE122.1⁺14
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出版历程
- 收稿日期: 2013-01-09
- 修回日期: 2013-05-23
- 刊出日期: 2013-07-28

Oil and source rock correlation of lower assemblage of Yanchang Formation in Wuqi and Dingbian areas, Ordos Basin

Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi'an, Shaanxi 710065, China

摘要

摘要: 通过对延长组下部地层组合中的长₇、长₉、长₁₀烃源岩及原油地化资料的对比分析认为,长₇烃源岩碳优势指数CPI为1.2,长₉和长₁₀为1.09;3套烃源岩中碳奇偶优势比均消失;长₇烃源岩中Ts相对含量高于Tm,而长₉和长₁₀烃源岩中Ts相对含量低于Tm,说明长₇烃源岩的成熟度要高于长₉和长₁₀烃源岩成熟度;规则甾烷中其ααα20R构型C₂₇、C₂₈和C₂₉甾烷的分布类型上,长₇呈现为"V"和"L"型分布,长₉呈现为近"V"字型和反"L"型分布,长₁₀主体呈反"L"型分布。长₈原油在研究区西部来源于长₇烃源岩,在东部及南部既来源于长₇又来源于长₉烃源岩;长₉原油在研究区西部来源于长₁₀烃源岩,在东部及南部既来源于长₉又来源于长₁₀烃源岩;长₁₀原油在研究区南部既来源于长₁₀又来源于长₉烃源岩。
- 下组合 /
- 延长组 /
- 烃源岩 /
- 油源对比 /
- 鄂尔多斯盆地
Abstract: The geochemical correlation of source rock and crude oil from the lower assemblage (Chang7, 9, 10, respectively) of the Yanchang Formation has indicated that, the carbon preference index (CPI) of the Chang7 source rock is 1.2, and that of the Chang9 and Chang10 source rocks is 1.09. The odd-even predominance (OEP) of carbon disappears in the Chang7, 9, 10 source rocks. In the Chang7 source rock, the relative content of Ts is higher than that of Tm, while in the Chang9 and Chang10 source rocks, the relative content of Ts is lower than that of Tm, indicating for higher maturity of the Chang7 source rock. The C₂₇, C₂₈, C₂₉ ααα20R regular steranes of the Chang7 source rock distribute in "V" and "L" shapes, and those of the Chang9 source rock in nearly "V" and anti-"L" shapes, and those of the Chang10 source rock in anti-"L" shape. Crude oil in the Chang8 strata mainly originated from the Chang7 source rock in the west of the study area, and from both the Chang7 and Chang9 source rocks in the east and south. Crude oil in the Chang9 strata mainly originated from the Chang10 source rock in the west of the study area, and from both the Chang9 and Chang10 source rocks in the east and south. Crude oil in the Chang10 strata originated from both the Chang10 and Chang9 source rocks in the south.
- lower assemblage /
- Yanchang Formation /
- source rock feature /
- oil and source correlation /
- Ordos Basin

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参考文献(16)

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