柴达木盆地西部英雄岭页岩天文旋回识别与高沉积速率下的沉积充填响应特征

盛军; 薛世团; 吕思锦; 张彩燕; 杨晓菁; 李雅楠; 郭笑; 王转转

doi:10.19509/j.cnki.dzkq.tb20230492

柴达木盆地西部英雄岭页岩天文旋回识别与高沉积速率下的沉积充填响应特征

doi: 10.19509/j.cnki.dzkq.tb20230492

盛军^{1, 2a, ,},
薛世团^2b,
吕思锦^2c,
张彩燕^{1, 2a},
杨晓菁^{1, 2a},
李雅楠^{1, 2a},
郭笑^{1, 2a},
王转转^{1, 2a}

1.
青海省高原咸化湖盆油气地质重点实验室，甘肃敦煌 736202
2a.
中国石油青海油田分公司勘探开发研究院
2b.
中国石油青海油田分公司油田开发事业部
2c.
中国石油青海油田分公司采油五厂，甘肃敦煌 736200

基金项目: 中国石油勘探与生产分公司科技项目“柴达木盆地页岩油综合地质研究、技术攻关与现场试验”（2022KT0304）

详细信息

通讯作者:
E-mail：shengjunqh@petrochina.com.cn

中图分类号: P618.12
计量
- 文章访问数: 215
- PDF下载量: 24
- 被引次数: 0
出版历程
- 收稿日期: 2023-08-28
- 录用日期: 2024-05-21
- 修回日期: 2024-02-19
- 网络出版日期: 2024-07-25

Astrocycle identification and high sedimentation rates sedimentary filling response characteristics in the Yingxiongling shale of western Qaidam Basin

SHENG Jun^{1, 2a
, ,},
XUE Shituan^2b,
LÜ Sijin^2c,
ZHANG Caiyan^{1, 2a},
YANG Xiaojing^{1, 2a},
LI Yanan^{1, 2a},
GUO Xiao^{1, 2a},
WANG Zhuanzhuan^{1, 2a}

1.
Plateau Saline Lacustrine Basin Oil-Gas Geology Key Laboratory of Qinghai Province, Dunhuang Gansu 736202, China
2a.
PetroChina Qinghai Oilfield Company Exploration & Development Research Institute
2b.
PetroChina Qinghai Oilfield Company Oilfield Development Business Department
2c.
PetroChina Qinghai Oilfield Company No.5 Oil Production Plant, PetroChina Qinghai Oilfield Company, Dunhuang Gansu 736200, China

More Information

Corresponding author: E-mail：shengjunqh@petrochina.com.cn

摘要

摘要:
柴达木盆地英雄岭页岩油勘探开发潜力巨大，但目前在旋回地层学方面的工作较为薄弱。为了明确英雄岭页岩的天文旋回沉积响应特征，通过对英雄岭页岩发育的下干柴沟组上段地层开展了4口井的频谱分析，综合岩心、测井、地球化学分析等方面的成果，在该套地层中识别出多组米兰科维奇旋回，并依据404.858 ka的长偏心率周期建立了英雄岭页岩“浮动”天文标尺，明确了英雄岭页岩的沉积速率与沉积充填特征。研究表明：英雄岭页岩沉积时间约为4.86 Ma、平均沉积速率达到340.44 m/Ma，高沉积速率是英雄岭页岩的重要特征之一。基于长偏心率周期分析的总有机碳含量沉积响应特征表明柴达木盆地英雄岭页岩的有机碳富集程度受沉积速率控制明显，随着沉积速率的增大，总有机碳含量呈升高趋势，当沉积速率超过450 m/Ma时，受到碎屑稀释效应影响，总有机碳含量出现显著下降。基于单一长偏心率周期的岁差旋回周期对沉积构造响应模式分析表明，当岁差参数处于最小值时，主要发育贫有机质层状灰云岩；当岁差参数处于最大值时，主要发育富有机质纹层状灰云岩。英雄岭页岩表现出的这种明显轨道强迫响应，将有助于页岩油有利层段预测，可为今后英雄岭页岩油高效勘探开发提供一些新思路。
- 柴达木盆地 /
- 英雄岭页岩 /
- 天文旋回 /
- 高沉积速率 /
- 充填响应
Abstract: <p>The exploration and development potential of the Yingxiongling shale oil in the Qaidam Basin is significant, however, current research on cyclostratigraphy is relatively limited.</p></sec> <sec><title>Objective
To clarify the characteristics of the astronomical cycle sedimentary response of Yingxiong Ling shale,
Methods
This study conducts a spectral analysis of four wells in the upper section of the Lower Ganchaigou Formation, which was developed within the Yingxiongling shale. Based on the results of core analysis, logging, and geochemical analysis, multiple sets of Milankovitch cycles in this set of strata are identified. Based on the 404.858 ka long eccentricity period, the "floating" astronomical scale of the Yingxiongling shale is established.
Results
The sedimentation time of the Yingxiongling shale is approximately 4.86 Ma, with an average sedimentation rate of 340.44 m/Ma. This high sedimentation rate is a key characteristic of the Yingxiongling shale. The sedimentary response characteristics related to the total organic carbon content based on long eccentricity period analysis revealed that the degree of organic carbon enrichment in the Yingxiongling shale in the Qaidam Basin was controlled by the sedimentation rate. As the deposition rate increased, the total organic carbon content also increased. However, when the deposition rate exceeds 450 m/Ma, total organic carbon decreases significantly due to the dilution effect of detrital materia. Furthermore, the sedimentary structure response model developed from precession period analysis shows that when the precession parameter is at its minimum, the primary development consists of poorly organic matter-rich layered limestone. In contrast, when the precession parameter was at the maximum value, the predominant development features limestone rich in organic matter.
Conclusion
The obvious orbital forced response exhibited by the Yingxiongling shale will assist in predicting favorable sections of shale oil and provide new assist in for the efficient exploration and development of Yingxiongling shale oil in the future.
- Qaidam Basin /
- Yingxiongling shale /
- astrocycle /
- high sedimentation rate /
- filling response

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图 1 柴达木盆地英雄岭页岩油藏区域位置（a）与地层综合柱状图（b）（据文献[19]修改）

Figure 1. Comprehensive histogram of the location (a) and stratigraphy (b) of the Yingxiongling shale reservoir in the Qaidam Basin

下载: 全尺寸图片幻灯片

图 2 英雄岭构造西段Ⅴ油组沉积微相图

Figure 2. Sedimentary microfacies map of the Ⅴ Formation in the western section of the Yingxiongling structural belt

下载: 全尺寸图片幻灯片

图 3 基于La2010模型提取的古近系下干柴沟组上段轨道周期变化曲线^[31]

Figure 3. Orbital period variation curve of the Upper Member of the Lower Ganchaigou Formation in Paleogene system extracted using La2010 model

下载: 全尺寸图片幻灯片

图 4 基于La2010模型的轨道周期变化曲线Redfit频谱分析结果

Figure 4. Redfit spectrum analysis results for the orbital period change curve based on the La2010 model

下载: 全尺寸图片幻灯片

图 5 英雄岭页岩柴907井GR曲线REDFIT与FFT频谱分析结果

a. REDFIT频谱分析曲线；b. REDFIT频谱分析曲线；c. FFT频谱分析图

Figure 5. REDFIT and FFT spectral analysis results of the GR curve of Chai 907 well in Yingxiongling shale

下载: 全尺寸图片幻灯片

图 6 英雄岭页岩下干柴沟组上段天文年代标尺（1～12为旋回个数，下同）

Figure 6. Astronomical age scale of the upper section of the Lower Ganchaigou Formation within the Yingxiongling shale

下载: 全尺寸图片幻灯片

图 7 英雄岭页岩井间沉积速率对比

Figure 7. Comparison of sedimentation rates among wells in the Yingxiongling shale

下载: 全尺寸图片幻灯片

图 8 英雄岭页岩典型年纹层镜下特征

a. 柴2-4井2820.06 m；b. 柴2-4井2848.88 m；c. 狮60井3336.55 m；d. 柴906井3225.43 m；e. 柴906井3237.18 m；f. 狮60井3454.61 m

Figure 8. Typical varve of the Yingxiongling shale observed under microscopy

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图 9 英雄岭页岩典型井w（TOC）测试结果

a. w（TOC）测试结果分布图；b. w（TOC）与沉积速率交会图。A，B，C为分区代号

Figure 9. Distribution of TOC content test results for typical wells in the Yingxiongling shale

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图 10 柴908井TOC分析结果与岁差频率周期（P1～P9为岁差周期；Ⅰ～Ⅴ，Ⅶ～Ⅷ为w（TOC）分段编号）

Figure 10. TOC analysis results and precession frequency period for Chai 908 well

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图 11 柴908井岩心照片

a. 柴908井在相对高沉积速率下（727.7 m/Ma）的岩心照片（以厚层状灰云岩为主夹块状砂质条带）；b. 柴908井在相对低沉积速率下（413.26 m/Ma）的岩心照片（以纹层状灰云岩为主）

Figure 11. Core photos of Chai 908 well

下载: 全尺寸图片幻灯片

图 12 英雄岭页岩岁差旋回影响的沉积响应模式

Figure 12. Sedimentary response mode affected by the precession cycle of the Yingxiongling shale

下载: 全尺寸图片幻灯片

表 1 柴达木盆地英雄岭页岩40～30 Ma期间理论天文周期比例表

Table 1. Theoretical astronomical cycle ratio of the Yingxiongling shale in the Qaidam Basin during the 40-30 Ma period

天文周期	时间/ka	岁差/("·a⁻¹)		轴斜率			偏心率
天文周期	时间/ka	18.192	22.262	53.996	57.241	62.305	95.238	124.688	404.858
偏心率	404.858	22.255	18.186	7.498	7.073	6.498	4.251	3.247	1.000
	124.688	6.854	5.601	2.309	2.178	2.001	1.309	1.000
	95.238	5.235	4.278	1.764	1.664	1.529	1.000
轴斜率	62.305	3.425	2.799	1.154	1.088	1.000
	57.241	3.147	2.571	1.060	1.000
	53.996	2.968	2.425	1.000
岁差("·a⁻¹)	22.262	1.224	1.000
岁差("·a⁻¹)	18.192	1.000

下载: 导出CSV

表 2 英雄岭页岩油井深度序列优势旋回频率与天文理论轨道周期对照表

Table 2. Comparison of dominant cycle frequency and astronomical theoretical orbital period of depth sequence in Yingxiongling shale oil well

理论轨道周期/ka	理论轨道周期比例	柴907井			柴13井			柴10井			柴908井
理论轨道周期/ka	理论轨道周期比例	旋回地层厚度/m	旋回地层比例	误差/%	旋回地层厚度/m	旋回地层比例	误差/%	旋回地层厚度/m	旋回地层比例	误差/%	旋回地层厚度/m	旋回地层比例	误差/%
404.858	1.000	138.63	1.000	−	102.04	1.000	−	102.669	1.000	−	137.005	1.000	−
124.688	3.247	44.42	3.120	3.89	30.76	3.317	2.16	30.608	3.354	3.31	43.424	3.155	2.83
95.238	4.251	32.59	4.253	0.05	23.23	4.393	3.34	24.183	4.246	0.13	32.349	4.235	0.37
62.305	6.498	21.39	6.482	0.25	16.06	6.353	2.24	15.702	6.539	0.62	20.796	6.588	1.39
57.241	7.073	19.26	7.199	1.78	14.49	7.040	0.46	14.566	7.049	0.34	19.148	7.155	1.16
53.996	7.498	18.47	7.506	0.11	13.64	7.482	0.21	13.485	7.613	1.54	17.841	7.679	2.42
22.262	18.186	7.89	17.564	3.42	6.25	16.326	10.23	6.692	15.343	15.63	8.404	16.302	10.36

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表 3 柴达木盆地英雄岭页岩与国内其他盆地沉积速率对比

Table 3. Comparison of sedimentary rates between the Yingxiongling shale in the Qaidam Basin and other domestic basins

盆地	层段	沉积速率/（m·Ma⁻¹）	数据来源
松辽盆地	青一段	86.96	文献[47]
	青一段	85.1～99.02	文献[43]
	登二段	162	文献[48]
鄂尔多斯盆地	长7段	26.1	文献[46]
二连盆地	腾格尔组	44～145	文献[45]
珠江口盆地	珠海组	72.5～165	文献[44]
	恩平组	80～187.5
	文昌组	78.8～166.3
渤海湾盆地	沙四上亚段	105～147	文献[9]
渤海湾盆地	沙三下亚段	78.5～86.6	文献[14]

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