致密砂砾岩成储界限及分级评价标准——以松辽盆地徐家围子断陷白垩系沙河子组为例

王军杰; 卢双舫; 林子智; 周能武; 张鹏飞; 黄宏胜; 郅琪; 李柏知

doi:10.11781/sysydz202403553

致密砂砾岩成储界限及分级评价标准——以松辽盆地徐家围子断陷白垩系沙河子组为例

doi: 10.11781/sysydz202403553

王军杰^{1, 2,},
卢双舫^{1, 2, ,},
林子智³,
周能武¹,
张鹏飞⁴,
黄宏胜³,
郅琪³,
李柏知³

1.
东北石油大学三亚海洋油气研究院, 海南三亚 572025
2.
东北石油大学陆相页岩油气成藏及高效开发教育部重点实验室, 黑龙江大庆 163318
3.
中国石油大学(华东) 地球科学与技术学院, 山东青岛 266580
4.
山东科技大学地球科学与工程学院, 山东青岛 266590

基金项目:

国家自然科学基金项目 42272156

山东省自然科学基金项目 ZR2020QD036

详细信息

作者简介:
王军杰(1999—)，男，博士生，从事页岩油气地质评价研究。E-mail: wjj19990125@163.com

通讯作者:
卢双舫(1962—)，男，博士，教授，从事非常规油气地质和油气地球化学研究。E-mail: lushuangfang@nepu.edu.cn

中图分类号: TE122.24
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- 文章访问数: 567
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- 被引次数: 0
出版历程
- 收稿日期: 2023-06-05
- 修回日期: 2024-03-29
- 刊出日期: 2024-05-28

Reservoir limits and grading evaluation criteria of tight glutenite: a case study of Cretaceous Shahezi Formation in Xujiaweizi Fault Depression, Songliao Basin

1.
Sanya Offshore Oil & Gas Research Institute, Northeast Petroleum University, Sanya, Hainan 572025, China
2.
Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
3.
School of Geoscience, China University of Petroleum (East China), Qingdao, Shandong 266580, China
4.
College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China

摘要

摘要: 徐家围子断陷下白垩统沙河子组砂砾岩储层是松辽盆地深部重要的致密气藏储层，其孔渗关系复杂，给成储界限的厘定和储层分级评价带来挑战。针对沙河子组砂砾岩储层，采用水膜厚度法、充注动力法、试气产能法和力学平衡法厘定了理论下限、成藏下限、有效渗流下限和成储上限，根据不同成岩作用主控因素下的孔渗关系确定成储界限物性值。在此基础上，结合储层微观孔隙结构差异划分储层类型，建立致密储层分级评价标准，并利用测井资料将分级评价标准进行应用，为研究区致密气甜点区优选提供依据。将沙河子组砂砾岩分为常规储层、Ⅰ—Ⅳ级致密砂砾岩储层和非储层，成储界限与分级评价结果具有很好的匹配关系。其中，常规储层孔隙度大于9%，渗透率大于0.05×10^-3 μm²；Ⅰ级致密储层孔隙度为8%~9%，渗透率为(0.01~0.05)×10^-3 μm²；Ⅱ级致密储层孔隙度为5%~8%，渗透率为(0.001~0.01)×10^-3 μm²；Ⅲ级致密储层孔隙度为3.5%~5%，渗透率为(0.2 ~1)×10^-6 μm²；Ⅳ级致密储层孔隙度为2%~3.5%，渗透率为(0.05~0.2)×10^-6 μm²；非储层的孔隙度小于2%，渗透率小于0.05×10^-6 μm²。致密砂砾岩气产量受控于致密储层类型；Ⅰ级、Ⅱ级致密储层是致密气高产的有利层段；徐家围子断陷北部安达—宋站地区有利储层厚度较大，为致密气勘探开发甜点区。
- 致密砂砾岩气 /
- 成储界限 /
- 分级评价 /
- 甜点评价 /
- 徐家围子断陷 /
- 沙河子组 /
- 松辽盆地
Abstract: The Lower Cretaceous Shahezi Formation glutenite reservoirs in the Xujiaweizi Fault Depression are important tight gas reservoirs in the deep strata of the Songliao Basin. Their complex porosity and permeability relationships pose challenges to determining reservoir boundaries and evaluating reservoir grades. For the Shahezi Formation glutenite reservoirs, the water film thickness method, charge dynamics method, gas testing productivity method, and buoyancy balance method were used to determine theoretical lower limits, gas accumulation lower limits, effective flow lower limits, and reservoir-forming upper limits. The petrophysical values of the reservoir boundaries were determined based on the porosity and permeability relationships under different diagenetic controlling factors. On this basis, reservoir types were classified according to differences in microscopic pore structures, and a grading evaluation standard for tight reservoirs was established. This standard was then applied using logging data to provide a basis for selecting sweet spots in the tight gas exploration areas. The Shahezi Formation glutenite was divided into conventional reservoirs, Class Ⅰ-Ⅳ tight glutenite reservoirs, and non-reservoirs. The reservoir boundaries and classification evaluation results were well matched. Conventional reservoirs had porosity greater than 9% and permeability greater than 0.05×10^-3 μm². Class Ⅰ tight reservoirs had porosity of 8%-9% and permeability of (0.01-0.05)×10^-3 μm². Class Ⅱ tight reservoirs had porosity of 5%-8% and permeability of (0.001-0.01)×10^-3 μm². Class Ⅲ tight reservoirs had porosity of 3.5%-5% and permeability of (0.2-1)×10^-3 μm². Class Ⅳ tight reservoirs had porosity of 2%-3.5% and permeability of (0.05-0.2)×10^-6 μm². Non-reservoirs had porosity less than 2% and permeability less than 0.05×10^-6 μm². The gas production of tight glutenite was controlled by the reservoir type. Class Ⅰ and Class Ⅱ tight reservoirs were favorable high-yield layers. The thickness of favorable reservoirs in the Anda-Songzhan area of the northern Xujiaweizi Fault Depression was large, making it a sweet spot for tight gas exploration and development.
- tight glutenite gas /
- reservoir limit /
- grading evaluation /
- sweet spot evaluation /
- Xujiaweizi Fault Depression /
- Shahezi Formation /
- Songliao Basin
注释:

1) 所有作者声明不存在利益冲突。

1) 利益冲突声明/Conflict of Interests

2) 作者贡献/Authors’Contributions

2) 王军杰、卢双舫参与实验设计和论文写作；王军杰、林子智、周能武、张鹏飞完成实验操作；黄宏胜、郅琪、李柏知参与数据整理与绘图。所有作者均阅读并同意最终稿件的提交。

HTML全文

图 1 松辽盆地徐家围子断陷地质概况及白垩系沙河子组岩性剖面

据参考文献[26-27]修改。

Figure 1. Geological overview of Xujiaweizi Fault Depression in Songliao Basin and lithologic profile of Cretaceous Shahezi Formation

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图 2 松辽盆地徐家围子断陷白垩系沙河子组致密砂砾岩孔喉比分布

Figure 2. Ratio distribution of pore radius to throat radius of tight glutenite in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 3 松辽盆地徐家围子断陷白垩系沙河子组浮力、毛细管阻力与喉道半径关系

Figure 3. Relationship between buoyancy, capillary pressure, and throat radius in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 4 水膜厚度法厘定松辽盆地徐家围子断陷白垩系沙河子组致密气理论下限

Figure 4. Theoretical lower limit of tight gas determined by water film thickness method in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 5 充注动力法厘定松辽盆地徐家围子断陷白垩系沙河子组致密气成藏下限

Figure 5. Gas accumulation lower limit determined by the charging power method in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 6 试气产能法厘定松辽盆地徐家围子断陷白垩系沙河子组致密气有效渗流下限

Figure 6. Effective flow lower limit of tight gas determined by gas productivity method in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 7 松辽盆地徐家围子断陷白垩系沙河子组致密砂砾岩成储界限厘定

Figure 7. Determination of limits in tight glutenite reservoirs in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 8 松辽盆地徐家围子断陷白垩系沙河子组致密砂砾岩镜下特征

Figure 8. Microscopic characteristics of tight glutenite in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 9 松辽盆地徐家围子断陷白垩系沙河子组致密砂砾岩不同类型致密储层高压压汞曲线

Figure 9. High-pressure mercury injection curves in different types of tight glutenite reservoirs in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 10 松辽盆地徐家围子断陷白垩系沙河子组致密砂砾岩不同类型致密储层孔隙结构差异

Figure 10. Differences of pore structure in different types of tight glutenite reservoirs in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 11 松辽盆地徐家围子断陷白垩系沙河子组不同类型储层孔隙度—渗透率交会图

Figure 11. Porosity and permeability distribution of different types of reservoirs in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 12 松辽盆地徐家围子断陷白垩系沙河子组致密砂砾岩孔隙度与密度关系

Figure 12. Relationship between porosity and density of tight glutenite in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 13 松辽盆地徐家围子断陷白垩系沙河子组部分井储层分级评价结果及试气结果

Figure 13. Results of reservoir grading evaluation and gas test of some wells in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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图 14 松辽盆地徐家围子断陷白垩系沙河子组各类致密砂砾岩储层厚度分布

Figure 14. Thickness distribution of tight glutenite reservoirs in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

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表 1 松辽盆地徐家围子断陷白垩系沙河子组致密砂砾岩分级评价标准及成储界限

Table 1. Grading evaluation criteria and reservoir limits of tight glutenite in Cretaceous Shahezi Formation of Xujiaweizi Fault Depression in Songliao Basin

储层分级	孔隙度/%	渗透率/10^-6 μm²	界限
常规储层	>9	>50	储层上限
Ⅰ级储层	8~9	10~50	储层上限
Ⅱ级储层	5~8	1~10	有效渗流下限成藏下限理论下限
Ⅲ级储层	3.5~5	0.2~1
Ⅳ级储层	2~3.5	0.05~0.2
非储层	< 2	< 0.05

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