致密砂岩碎屑颗粒粒度定量表征及对产能的指示意义

姚梦麟; 陶云贺; 贺洪举; 侯克均; 刘海军; 熊宇; 张冲

doi:10.19509/j.cnki.dzkq.tb20230582

致密砂岩碎屑颗粒粒度定量表征及对产能的指示意义

doi: 10.19509/j.cnki.dzkq.tb20230582

1.
川庆钻探工程有限公司对外合作和市场开发处，成都 610051
2.
中国石油集团测井有限公司西南分公司，重庆 400021
3.
中石油西南油气田开发事业部，成都 610051
4.
长江大学地球物理与石油资源学院，武汉 430100

基金项目: 国家自然科学基金项目（41404084）

详细信息

作者简介:
姚梦麟：E-mail：yaoml_dyy@cnpc.com.cn

通讯作者:
E-mail：yzlogging@163.com

中图分类号: P618.13
计量
- 文章访问数: 246
- PDF下载量: 20
- 被引次数: 0
出版历程
- 收稿日期: 2023-10-20
- 录用日期: 2024-02-26
- 修回日期: 2024-02-23
- 网络出版日期: 2024-03-29

Quantitative characterization of the clastic particle size of tight sandstone and its indicative significance for productivity

1.
CCDC External Cooperation & Department, Chengdu 610051, China
2.
Southwest Branch, China National Logging Corporation, Chongqing 400021, China
3.
PetroChina Southwest Oil & Gasfield Company, Chengdu 610051, China
4.
Geophysics and Oil Resource Institute, Yangtze University, Wuhan 430100 , China

More Information

Author Bio:
Email：yaoml_dyy@cnpc.com.cn

Corresponding author: E-mail：yzlogging@163.com

摘要

摘要:
粒度分析可以判别地层沉积环境和评价储层渗透性，对碎屑岩油气储层评价十分重要。以四川盆地天府气田沙溪庙组致密砂岩储层为研究对象，分析了碎屑岩颗粒大小和形状对储层渗透性的影响，结合粒度中值M、粒度C值、分选系数等参数，提出了一个综合表征粒度的指示参数PI，对颗粒粒度比较敏感的测井参数自然伽马、光电吸收截面指数和中子进行主成分分析，降维成一个主成分参数，建立了粒度指示参数PI与主成分参数的指数关系模型，结合测试及测井资料，分析了粒度指示参数PI与储层产能的相关关系。统计了天府气田沙溪庙组7口井8个测试气层段，并通过上述方法计算了7口井的粒度指示参数PI值，分析了测试段无阻流量与粒度指示参数PI的响应关系。结果显示：天府气田沙溪庙组测试段无阻流量与粒度指示参数PI的累加值X呈指数关系，其相关系数R²达到0.85。研究说明：对于岩性以中−细粒砂岩为主，粒级变化大，且储集空间以残余粒间孔为主的储层，粒度指示参数PI在一定程度上可以指示该种类型储层的产能大小。
- 粒度指示参数PI /
- 粒度分析 /
- 测井表征 /
- 产能 /
- 沙溪庙组 /
- 四川盆地天府气田 /
- 致密砂岩 /
- 碎屑颗粒
Abstract: Objective
Particle size analysis is important for the evaluation of clastic petroleum reservoirs because it can identify the stratigraphic depositional environment and assess the permeability of reservoirs.
Methods
Using the dense sandstone reservoir of the Shaximiao Formation in the Tianfu Gas Field in the Sichuan Basin as the research object, we first analyzed the influence of the particle size and shape on the permeability of the clastic rock reservoir. Next, we combined the median and C values of the particle size and the sorting coefficient to perform a comprehensive characterization of the particle size indicator parameter (PI). Additionally, we carried out a principal component analysis on the natural gamma-ray logging value, photoelectric absorption cross-section index, and neutron porosity, which are more sensitive to particle size. An exponential relationship model between the PI and the principal component parameter was established. Finally, the correlation between PI and reservoir production capacity was analyzed by combining the Oil test and logging data.
Results
The statistics of 8 test gas sections from 7 wells in the Shaximiao Formation of Tianfu Gas Field were collected, and the PI values of 7 wells were calculated using the above method. The response relationship between the unimpeded flow rate and the PI was analyzed in the test sections, and the results revealed that the unimpeded flow rate and the cumulative PI values in the Shaximiao Formation exhibited an exponential relationship, with a correlation coefficient of 0.85.
Conclusion
This study reveals that, for reservoirs whose lithology is dominated by medium- to fine-grained sandstone, with large variations in grain size, and with storage space dominated by residual intergranular pores, the PI can, to some extent, serve as an indicator of the production capacity of this type of reservoir.
- particle size parameter /
- particle size analysis /
- well log /
- productivity /
- Shaximiao Formation /
- Tianfu gas field in the Sichuan Basin /
- tight sandstone /
- clastic particle

HTML全文

图 1 碎屑颗粒粒度大小及分布特征曲线（永浅A井，沙溪庙组沙二段）

C. 粒度C值；M. 粒度中值；S_o. 分选系数

Figure 1. Size and distribution characteristic of debris particles

下载: 全尺寸图片幻灯片

图 2 颗粒大小和形状对储层渗透性的影响（改自文献[22]）

K_H1>K_H2>K_H3；K_V1>K_V2>K_V3；K_H 为垂向渗透率；K_V为水平渗透率

Figure 2. Influence of particle size and shape on reservoir permeability

下载: 全尺寸图片幻灯片

图 3 天府区块沙溪庙组PI与测井参数之间的皮尔逊相关图

PI. 粒度指示参数；M. M-N交会图中的M（也叫岩性指示参数）；N. M-N交会图中的N（也叫岩性指示参数）；X. 冲洗带电阻率与孔隙度平方的乘积，$X=R_{xo}\phi^2 $；AC. 声波时差；CNL. 补偿中子；DEN. 补偿密度；GR. 自然伽马；PE. 光电吸收截面指数；RT. 深侧向电阻率；RXO. 浅侧向电阻率；下同

Figure 3. Pearson correlation between PI and logging parameters of the Shaximiao Formation in the Tianfu Block

下载: 全尺寸图片幻灯片

图 4 粒度指示参数PI与主成分F₁的相关关系图

Figure 4. Correlation plot of the particle size indicator parameter PI with the principal component F₁

下载: 全尺寸图片幻灯片

图 5 沙溪庙组粒度指示参数PI测井评价效果图（永浅A井）

Core PI. 岩心粒度指示参数；1 IN=2.54 cm

Figure 5. Result of PI logging evaluation based on particle size indicator parameters in the Shaximiao Formation

下载: 全尺寸图片幻灯片

图 6 天府气田部分测试层段粒度指示参数PI响应特征

注：无阻流量为试油测试获取的产液量；黑色加粗框线为统计无阻流量值的深度段；下同

Figure 6. PI characteristics response to the particle size indicator parameters in several tested layers of the Tianfu gas field

下载: 全尺寸图片幻灯片

图 7 天府气田测试段无阻流量与粒度指示参数PI的累加值x的关系

Figure 7. Correlation between the unimpeded flow rate and the cumulative PI value, x, in the test section of the Tianfu gas field

下载: 全尺寸图片幻灯片

表 1 主成分分析结果

Table 1. Results of the principal component analysis

主成分	初始特征值			主成分相关系数			主成分矩阵
主成分	特征值	方差/%	累计方差/%	Z_GR	Z_PE	Z_CNL	Z_GR	Z_PE	Z_CNL
F₁	2.308	83.675	83.675	0.583	0.456	0.545	0.886	0.693	0.828
F₂	0.497	10.676	94.351	—	—	—	—	—	—
F₃	0.228	5.649	100	—	—	—	—	—	—

下载: 导出CSV

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