松辽盆地南部中小断陷白垩系烃源岩成熟度综合评价——以彰武、昌图断陷为例

武英利; 朱建辉; 倪春华; 李贶

doi:10.11781/sysydz202002289

松辽盆地南部中小断陷白垩系烃源岩成熟度综合评价——以彰武、昌图断陷为例

doi: 10.11781/sysydz202002289

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

基金项目:

中国石化科技部项目 P12005

详细信息

作者简介:
武英利(1979-), 女, 高级工程师, 从事油气勘探开发综合研究。E-mail: wuyl.syky@sinopec.com

中图分类号: TE122.11
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- 被引次数: 0
出版历程
- 收稿日期: 2019-03-18
- 修回日期: 2020-01-12
- 刊出日期: 2020-03-28

Comprehensive evaluation of Cretaceous source rock maturity in medium and small fault depressions in southern Songliao Basin: a case study of Zhangwu and Changtu fault depressions

Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

摘要

摘要: 应用镜质体反射率、烃转化率、OEP、甾烷异构化、藿烷等多项指标，对松辽盆地南部彰武、昌图断陷下白垩统沙海组—九佛堂组烃源岩成熟度特征进行综合评价，刻画烃源岩随埋深变化的动态热演化过程。松南地区南、北部断陷烃源岩的生烃门限存在显著差异，导致各断陷内的烃源岩现今所处的成熟演化阶段各有不同。南部彰武断陷烃源岩生烃门限深度大约在1 000 m，总体上沙海组烃源岩处于未熟—低成熟阶段；九佛堂组烃源岩上部处于低成熟阶段，而下部则处于成熟阶段。北部昌图断陷生烃门限深度大约在1 800 m，总体上沙海组下部、九佛堂组烃源岩处于低成熟—成熟阶段。南部断陷群九佛堂组中下部为有效烃源岩发育层段；而北部断陷群除九佛堂组为有效烃源岩发育层段外，沙海组中下部也是重要的烃源层段。
- 热解 /
- 饱和烃色谱 /
- 成熟度 /
- 生烃门限 /
- 松辽盆地南部
Abstract: A comprehensive evaluation of the maturity of the source rocks in the Cretaceous Shahai and Jiufotang formations in the Zhangwu and Changtu fault depressions of the southern Songliao Basin was made using several indicators, including vitrinite reflectance, hydrocarbon conversion rate, OEP, sterane isomerization and hopanoid distribution. The dynamic evolution process of source rocks with burial depth was described. The hydrocarbon generation threshold is different between the southern and northern fault depressions, resulting in the various maturity stages of source rocks. The hydrocarbon generation threshold of source rocks in the Zhangwu Fault Depression in the south is about 1 000 m. Generally, the source rocks in the Shahai Formation are in the immature and low maturity stages. The source rocks in the upper Jiufotang Formation are in the low maturity stage, while those in the lower part are in the mature stage. The hydrocarbon generation threshold of source rocks in the Changtu Fault Depression in the north is about 1 800 m. Generally, the source rocks in the lower Shahai Formation and the Jiufotang Formation are in the low maturity and mature stages. The middle and lower parts of the Jiufotang Formation in the southern fault depressions developed effective source rocks. The Jiufotang Formation in the northern fault depressions developed effective source rocks, and the middle and lower parts of the Shahai Formation also contributed.
- pyrolysis /
- saturated hydrocarbon chromatography /
- maturity /
- hydrocarbon generation threshold /
- southern Songliao Basin

HTML全文

图 1 松南地区东南部断陷群地质简图

Figure 1. Geological sketch map of fault depressions in southeastern part of southern Songliao Basin

下载: 全尺寸图片幻灯片

图 2 松辽盆地南部彰武(a)、昌图(b)断陷烃源岩R_o与埋深关系

Figure 2. Relationship between source rock maturity and depth in Zhangwu (a) and Changtu (b) fault depressions, southern Songliao Basin

下载: 全尺寸图片幻灯片

图 3 松辽盆地南部彰武、昌图断陷原油成熟度特征

Figure 3. Crude oil maturity of Zhangwu and Changtu fault depressions, southern Songliao Basin

下载: 全尺寸图片幻灯片

图 4 松辽盆地南部彰武、昌图断陷烃源岩萜烷随埋深的变化特征

Figure 4. Terpane characteristics of source rocks changing with burial depth, Zhangwu and Changtu fault depressions, southern Songliao Basin

下载: 全尺寸图片幻灯片

图 5 松辽盆地南部彰武(a)、昌图(b)断陷烃转化率与深度的关系

Figure 5. Relationship between hydrocarbon index and depth, Zhangwu(a) and Changtu(b) fault depressions, southern Songliao Basin

下载: 全尺寸图片幻灯片

图 6 松辽盆地南部彰武、昌图断陷烃源岩烃转化率随埋深变化对比

Figure 6. Hydrocarbon conversion rate of source rocks changing with burial depth, Zhangwu and Changtu fault depressions, southern Songliao Basin

下载: 全尺寸图片幻灯片

图 7 松辽盆地南部彰武、昌图断陷饱和烃奇偶优势变化关系

Figure 7. Odd even predominance of saturated hydrocarbon, Zhangwu and Changtu fault depressions, southern Songliao Basin

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图 8 松辽盆地南部彰武、昌图断陷九佛堂组烃源岩姥鲛烷、植烷随深度变化

Figure 8. Pristane and phytane characteristics of Jiufotang source rocks changing with burial depth, Zhangwu and Changtu fault depressions, southern Songliao Basin

下载: 全尺寸图片幻灯片

图 9 松辽盆地南部彰武、昌图断陷烃源岩甾烷异构化程度随深度变化

Figure 9. Sterane isomerization degree of source rocks changing with burial depth, Zhangwu and Changtu fault depressions, southern Songliao Basin

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表 1 松辽盆地南部彰武、昌图原油异构化程度与成熟度特征

Table 1. Isomerization degree and maturity of crude oil in Zhangwu and Changtu fault depressions, southern Songliao Basin

原油样品	OEP	C₂₉甾烷20S/(20S+20R)	C₂₉甾烷20Rββ/(αα+ββ)	芳烃MPI换算的R_o，%	轻烃参数换算的R_o，%
ZW1	1.099	0.30	0.27	0.71	0.65
ZW2-1	1.048	0.38	0.28	0.76	0.68
ZW2-2	1.081	0.39	0.35	0.72	0.76
ZW2-3	1.074	0.44	0.29	0.84	0.74
ZW3	1.065	0.57	0.39	0.73	0.66
Q1	1.031	0.55	0.5	0.82	0.83

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