基于不同岩性的总有机碳分段预测方法——以东营凹陷始新统沙河街组三段下亚段为例

赵琳洁; 陆建林; 王保华; 李浩; 宋振响; 张彦霞

doi:10.11781/sysydz202104721

基于不同岩性的总有机碳分段预测方法——以东营凹陷始新统沙河街组三段下亚段为例

doi: 10.11781/sysydz202104721

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“油气战略选区评价与决策支持技术” P21086-1

国家科技重大专项 2017ZX05049001-006

详细信息

作者简介:
赵琳洁(1992-), 女, 硕士, 助理工程师, 从事石油地质研究。E-mail: zhaolj.syky@sinopec.com

中图分类号: TE122.115
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- 被引次数: 0
出版历程
- 收稿日期: 2020-04-28
- 修回日期: 2021-06-04
- 刊出日期: 2021-07-28

Segmented prediction of TOC based on lithology: a case study of the lower sub-member of the third member of the Eocene Shahejie Formation, Dongying Sag, Bohai Bay Basin

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

摘要

摘要: 陆相泥页岩具有非均质性强的特征，矿物组分、总有机碳含量（TOC）等参数的分布预测是陆相页岩油气资源评价与选区研究的基础。为获取陆相页岩地层上述关键参数纵向分布特征，克服测试实验周期长、成本高、取样难等现实问题，开展了相应关键参数测井预测方法研究。以渤海湾盆地东营凹陷始新统沙河街组三段下亚段为例，结合XRD实测数据以及测录井等资料，具体针对不同岩性选取不同TOC预测模型，建立了不同岩性的TOC识别模板。运用所构建的模型对Fy1井沙三下亚段的岩性、TOC进行典型预测，分段预测TOC方法得到的预测值与实测值之间的相关系数较高，约为0.84，表明该方法可行性较强，可为开展陆相页岩油资源评价及目标评价提供有效的技术支撑。
- 有机碳含量 /
- 泥页岩 /
- 沙三下亚段 /
- 沙河街组 /
- 始新统 /
- 东营凹陷 /
- 渤海湾盆地
Abstract: The continental mud shale has a strong heterogeneity, and the prediction of its mineral composition, TOC (total organic carbon content) and other parameters is critical for the evaluation and optimization of continental shale oil and gas abundance. To obtain the vertical distribution characteristics of these key parameters of the continental shale formation, and to ovoid the practical problems such as time-consuming experiments, high cost, and sampling difficulty etc., a research of the logging prediction method for key parameters was carried out. The lower sub-member of the third member of the Eocene Shahejie Formation (Es₃) in the Dongying Sag of the Bohai Bay Basin was employed as an example, XRD measurements and logging were carried out based on which, various TOC prediction models were selected for different lithologies, and some TOC identification templates of different lithologies were established.The constructed model was then used to perform typical predictions on the lithology and TOC of the lower sub-member of the Shahejie Formation in well Fy1.The correlation coefficient between the predicted values obtained by the segmented prediction method for TOC and the measured values appeared to be relatively high (about 0.84), indicating that the method developed here is highly feasible and can provide effective technical support for the evaluation and target optimization of continental shale oil resources.
- organic carbon content /
- shale /
- the lower submember of the third member of Shahejie Formation /
- Eocene /
- Shahejie Formation /
- Dongying Sag /
- Bohai Bay Basin

HTML全文

图 1 渤海湾盆地东营凹陷始新统沙河街组三段下亚段细粒沉积岩岩相分布

据参考文献[15]。

Figure 1. Lithofacies of lamellar fine-grained sedimentary rocks in the lower sub-member of Es₃, Dongying Sag, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 2 渤海湾盆地东营凹陷始新统沙河街组三段下亚段岩性三角图

Figure 2. Lithology triangular chart of the lower sub-member of Es₃, Dongying Sag, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 3 渤海湾盆地东营凹陷始新统沙河街组三段下亚段预测岩性三角图

Figure 3. Prediction of lithology of the lower sub-member of Es₃, Dongying Sag, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 4 渤海湾盆地东营凹陷始新统沙河街组三段下亚段主要岩性不同方法TOC的预测值与实测值交会图

Figure 4. Predicted and measured values of TOC with different methods, lower sub-member of Es₃, Dongying Sag, Bohai Bay

下载: 全尺寸图片幻灯片

图 5 渤海湾盆地东营凹陷始新统沙河街组三段下亚段黏土岩中AC、DEN曲线与TOC实测值交会图

Figure 5. AC, DEN and measured TOC values in clay rocks, lower sub-member of Es₃, Dongying Sag, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 6 渤海湾盆地东营凹陷始新统沙河街组三段下亚段不同预测方法预测TOC与实际值交会图

Figure 6. Measured and predicted TOC values with different methods, lower sub-member of Es₃, Dongying Sag, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 7 渤海湾盆地东营凹陷Fy1井始新统沙河街组三段下亚段柱状图

Figure 7. Histogram of lower sub-member of Es₃, well Fy1, Dongying Sag, Bohai Bay Basin

下载: 全尺寸图片幻灯片

表 1 渤海湾盆地东营凹陷不同岩性的测井响应特征

Table 1. Logging responses of different lithologies, Dongying Sag, Bohai Bay Basin

岩性	测井响应特征	GR/API范围(峰值)	AC/(μs·ft^-1)范围(峰值)	NPHI/%范围(峰值)
粉砂岩	低GR、低AC、低NPHI	46.49~68.08(59.13)	77.54~95.03(83.55)	0.16~0.26(0.19)
黏土岩	高GR、高AC、高NPHI	58.08~73.65(64.34)	79.46~97.98(92.92)	0.17~0.25(0.22)
碳酸盐岩(灰岩)	低GR、中AC、低NPHI	37.81~79.67(59.02)	66.62~113.57(86.15)	0.12~0.33(0.19)
混合细粒岩	中GR、中AC、中NPHI	36.99~87.06(60.17)	66.04~111.01(88.91)	0.12~0.33(0.20)

下载: 导出CSV

表 2 渤海湾盆地东营凹陷始新统沙河街组三段下亚段不同岩性TOC预测模型

Table 2. Prediction models of TOC of different lithologies, lower sub-member of Es₃, Dongying Sag, Bohai Bay Basin

岩性	TOC预测方法	预测模型及参数
混合细粒岩	密度曲线法	$ \omega(\mathrm{TOC})=a_1 D E N+b_1$
灰岩	密度曲线法	$ \omega(\mathrm{TOC})=a_2 D E N+b_2$
粉砂岩	ΔlogR法	$ \Delta \lg R=\lg \left(\frac{R}{2.213}\right)+0.02(\Delta t-75.013)$
粉砂岩	ΔlogR法	$ \omega(\mathrm{TOC})=10^{(2.297-0.1688 \mathrm{LOM})} \Delta \lg R+c_3$
泥岩	多元回归法	$ \omega(\mathrm{TOC})=a_4 D E N+b_4 A C+c_4 G R+d_4$
注：DEN为密度曲线；R为电阻率曲线；Δt为声波时差曲线；LOM为成熟度指数；a₁、a₂、a₄、b₄、c₄为斜率；b₁、b₂、c₃、d₄为截距。

下载: 导出CSV

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