综合沉积正演与多点地质统计模拟辫状河三角洲: 以塔河T区为例

贺婷婷; 谈心; 段太忠; 赵磊; 张文彪; 乔勇; 刘彦锋

doi:10.19509/j.cnki.dzkq.2021.0301

综合沉积正演与多点地质统计模拟辫状河三角洲: 以塔河T区为例

doi: 10.19509/j.cnki.dzkq.2021.0301

基金项目:

国家科技重大专项 2016ZX05033-003-002

详细信息

作者简介:
贺婷婷(1987-), 女, 高级工程师, 主要从事油气藏精细描述、地热资源勘探评价研究。E-mail: htt10502@163.com

中图分类号: P539.2
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- 文章访问数: 466
- PDF下载量: 651
- 被引次数: 0
出版历程
- 收稿日期: 2020-06-12

Integrated sedimentary forward modeling and multipoint geostatistics in braided river delta simulation: A case from block T of Tahe Oilfield

摘要

摘要: 为有效提高三角洲沉积相模拟的精度，以塔河T区为例，应用地震、岩心及测井资料，通过定量评估可容纳空间、物源供给和沉积搬运之间复杂的关系，建立该地区辫状河三角洲砂体沉积正演模型，并将此转化为多点地质统计模拟的三维训练图像，进行研究区辫状河三角洲多点地质统计模拟。研究表明：辫状河三角洲砂体分布受沉积正演模拟控制参数影响，其中砂质供应体积分数、沉积物流入比例、水流载荷量及洪水期间隔均属于强敏感性参数，对研究区三角洲砂体分布影响较大；砂岩含量沉积正演模型体现了辫状河三角洲退积式沉积过程，符合研究区沉积特征，将其转化为三维训练图像，多点地质统计模拟结果在三维空间具有受训练图像约束的特征，体现了训练图像所反映的相带接触关系，并且与钻井认识一致。所提出的这种新的获取三角洲沉积体三维训练图像的方法，综合了沉积正演模拟与多点地质统计模拟的优势，取得了一定的应用效果，对类似沉积体三维地质建模具有一定的借鉴作用。
- 沉积数值模拟 /
- 多点地质统计学 /
- 训练图像 /
- 辫状河三角洲
Abstract: In order to effectively improve the accuracy of delta sedimentary facies simulation, based on integrated analysis of seismic, core and logging data of Tahe Block T to quantitatively evaluate the complex relationship between recommendation, source supply and transportation, multi-condition constraint is used to create the sedimentary forward model of braided delta sandbody as the 3D training image of multipoint geostatistical simulation.The study shows that the sand body distribution in the braided river delta is affected by the control parameters of sedimentary forward modeling, and the percentage of sandstone supply, the ratio of sediment flow, the discharge and the flood interval are all strong sensitivity parameters, which have a great influence on the distribution of delta sand bodies in the study area; The sandstone content model embodies the retrogradation sedimentary process of the braided river delta, and conforms to the sedimentary characteristics of the study area.Then it is converted to 3D training image, and the multipoint simulation result is characterized by the training image constraints in the three-dimensional space, revealing the facies contact relationship reflected by the training image, and consistent with the drilling knowledge.This study proposes a new method for acquiring 3D training images, which combines the advantages of sedimentary forward modeling and multipoint geostatistical simulation, and has achieved certain application effect, which has a certain reference for the similar 3D geological modeling of sediments.
- sedimentary numerical simulation /
- multi-point geostatistics /
- training image /
- braided river delta

HTML全文

图 1 模拟目的段取心井短期基准面旋回划分

Figure 1. Short-term base-level cycle division of the simulation core well

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图 2 研究区沉积数值模拟路线图

Figure 2. Sedimentary numerical simulation workflow scheme of the study area

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图 3 研究区初始基底水深图

Figure 3. Bathymetry map of the study area

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图 4 物源砂岩供应体积分数敏感性模拟结果

Figure 4. Sensitivity simulation result of the percentage of sandstone supply

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图 5 水流载荷量敏感性模拟结果

Figure 5. Sensitivity simulation result of current load quantity

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图 6 短期高能期间沉积物流入比例敏感性模拟结果

Figure 6. Sensitivity simulation result of the ratio of sediment flow in short-term high enery period

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图 7 短期高能期间洪水期间隔敏感性模拟结果

Figure 7. Sensitivity simulation result of the flood interval

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图 8 沉积模拟剖面与实钻剖面岩性分布及旋回性对比

Figure 8. Comparison of lithology distribution and cyclicity between sedimentary simulation section and the actual drilling section

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图 9 研究区砂岩沉积演化平面图

Figure 9. Sandstone sedimentary evolution in the study area

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图 10 开发层位模拟与实钻旋回性对比

Figure 10. Cycle comparison of simulation and actual drilling in the development formation

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图 11 手绘和沉积模拟训练图像建模结果对比

Figure 11. Comparison of modeling results of hand-drawn and sedimentary simulation training images

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图 12 辫状河三角洲三维训练图像空间分布特征

Figure 12. Braided delta training image viewed from 3D and fence

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图 13 目的层模拟结果纵向变化

Figure 13. Vertical evolution of the object formation

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图 14 实钻与模拟结果过井剖面相对比

Figure 14. Comparison between actual drilling and simulation results through well profile analysis

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表 1 沉积模拟厚度与井点厚度对比

Table 1. Contrast of sedimentary simulation thickness and well thickness

井名	井点地层厚度/m	模拟地层厚度/m	误差/%
T2	47.47	48.31	1.74
T5	43.66	45.48	4
T8	43.27	44.94	3.72
T1	44.61	45.96	2.94
T10	47.35	48.14	1.64
T7	47.19	48.22	2.14
T11	47.51	47.79	0.59

下载: 导出CSV

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