基于波形指示模拟的致密砂岩储层预测

杜佳; 刘彦成; 白洁玢; 张迎春; 林利明; 师素珍

doi:10.19509/j.cnki.dzkq.2022.0155

基于波形指示模拟的致密砂岩储层预测

doi: 10.19509/j.cnki.dzkq.2022.0155

1.
中联煤层气有限责任公司, 北京 100015
2a.
中国矿业大学(北京)地球科学与测绘工程学院，北京 100083
2b.
中国矿业大学(北京)煤炭资源与安全开采国家重点实验室，北京 100083

基金项目:

中央高校基本科研业务费专项资金 2022JCCXMT01

煤炭资源与安全国家重点实验室开放基金项目 SKLCRSM19ZZ02

煤炭资源与安全开采国家重点实验室—北京高等学校卓越青年科学家计划项目2020年联合基金项目 BJJWZYJH01201911413037

中海石油(中国)有限公司重大科技专项“中联公司上产60亿方关键技术研究” CNOOC-KJ 135 ZDXM 40

详细信息

作者简介:
杜佳(1983—)，女，工程师，主要从事非常规天然气勘探开发研究工作。E-mail：dujia3@cnooc.com.cn

通讯作者:
师素珍(1983—)，女，副教授，主要从事地震勘探研究工作。E-mail: ssz@cumbt.edu.cn

中图分类号: P631.4
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- 文章访问数: 522
- PDF下载量: 54
- 被引次数: 0
出版历程
- 收稿日期: 2022-03-07
- 网络出版日期: 2022-11-10

Prediction of tight sandstone reservoirs based on waveform indication simulation

1.
China United Coalbed Methane Corporation Ltd., Beijing 100015, China
2a.
School of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China
2b.
State Key Laboratory for Coal Resources and Safety Mining, China University of Mining and Technology(Beijing), Beijing 100083, China

摘要

摘要:
随着勘探开发的不断深入，地质目标逐渐由常规储层转向非常规储层。鄂尔多斯盆地东北缘砂岩储层纵向叠置、厚度薄、横向变化快，传统的反演技术无法满足薄储层精细预测的要求。波形指示模拟基于波形相控的思路，利用地震波形代替变差函数分析储层的分布特征，可以实现非阻抗参数模拟，是一种高精度反演技术。综合地质、地震和测井资料，基于自然伽马曲线，对鄂尔多斯盆地东缘MG区块进行了波形指示模拟，刻画出目的层砂岩储层的分布规律。结果表明，波形指示模拟具有较高的横、纵向分辨率，反演结果与钻井吻合度较好，与地震波形相关性强，能够反映储层的空间变化情况，且比较符合研究区的地质沉积规律。因此，波形指示模拟作为一种更高效的反演方法，为薄层、薄互储层的精细研究提供了有力支撑，有助于最大程度地实现对气藏资源的开发和利用。
- 波形指示模拟 /
- 相控 /
- 敏感曲线 /
- 储层预测 /
- 致密砂岩
Abstract:
With the deepening exploratory development, geological targets are gradually shifting from conventional reservoirs to unconventional ones. The sandstone reservoirs in the northeast margin of the Ordos Basin are stacked vertically and change quickly horizontally with thin thicknesses. Therefore, traditional inversion technology cannot satisfy the requirements of precise prediction of thin reservoirs. To solve this problem, this paper integrated geological, seismic and logging data based on the GR curve. A wave form simulation of the MG block in the eastern margin of Ordos Basin was conducted, and the distribution of sandstone reservoirs in the target bed was depicted. The results showed that the waveform indication simulation profiles had a high resolution both horizontally and vertically. They were also in line with the drilling well and strongly correlated with the seismic waveform, which could reflect the spatial variation in the reservoir and accord with the law of geological deposition in the study area. Therefore, as a more efficient inversion method, waveform indication simulation provided a strong support for the refined study of thin inter-bedded reservoirs and helped to maximize the development and utilization of gas resources.
- waveform indication simulation /
- waveform facies-control /
- sensitive curve /
- reservoir prediction /
- tight sandstone

HTML全文

图 1 波形特征分析示意图

Figure 1. Schematic diagram of waveform character analysis

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图 2 波形指示反演频率成分分析

Figure 2. Frequency component analysis of waveform indication inversion

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图 3 波形指示反演流程图

Figure 3. Flow chart of waveform indication inversion

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图 4 研究区位置图

Figure 4. Location map of the study area

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图 5 M2井地球物理响应特征

Figure 5. Geophysical characteristics of Well M2

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图 6 波阻抗曲线直方图

Figure 6. Histogram of wave impedance curve

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图 7 自然伽马曲线直方图

Figure 7. Histogram of the gamma ray curve

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图 8 波形指示模拟剖面

Figure 8. Profile of waveform indication simulation

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图 9 波形指示模拟叠合地震波形充填剖面

Figure 9. Profile of waveform indication simulating superimposed seismic waveform filling profile

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图 10 太1段(a)、太2段(b)反演平面图

Figure 10. Inversion slice of the first (a) and second (b) Member of Taiyuan Formation

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图 11 砂岩厚度统计图

Figure 11. Statistical map of sandstone thickness

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表 1 地震波形指示反演和模拟的区别

Table 1. Difference between inversion and simulation of seismic waveform indication

	波形指示反演	波形指示模拟
输入曲线	波阻抗曲线	敏感曲线
地震数据作用	波形指示储层结构、提供中频段相对阻抗	波形指示储层结构
输出结果	波阻抗体	敏感曲线数据体
适用性	波阻抗曲线可以区分砂泥岩	波阻抗无法区分砂泥岩，敏感曲线能够区分砂泥岩
主要用途	反映沉积特征、砂岩分布	预测储层敏感参数分布

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表 2 太原组砂岩预测符合情况

Table 2. Sandstone prediction consistency of the Taiyuan Formation

井名	太1段符合情况	太2段符合情况
M1	√	√
M2	√	×
M3	×	√
M4	√	×
M5	√	√
M6	√	√
M7	√	√
M8	×	√
M9	√	√
M10	√	√
M11	×	√
M12	√	√
M13	√	√
M14	×	√
M15	√	×
M16	√	√
M17	×	√
M18	√	√

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