朝阳沟阶地扶杨油层微观孔隙结构及渗流机理分析

赵军; 闫文雯; 徐通; 白雪晶; 张洪谋; 马继升; 杨威; 杨裕庆; 赵强; 薛东安; 李卓; 李思涵; 丛琳

doi:10.19509/j.cnki.dzkq.2022.0111

朝阳沟阶地扶杨油层微观孔隙结构及渗流机理分析

doi: 10.19509/j.cnki.dzkq.2022.0111

赵军^{1, 2,},
闫文雯²,
徐通²,
白雪晶³,
张洪谋²,
马继升²,
杨威²,
杨裕庆²,
赵强²,
薛东安²,
李卓²,
李思涵^2, ,,
丛琳⁴

1.
中国石油大港油田有限责任公司勘探开发研究院, 天津 300280
2.
中国石油大庆油田有限责任公司第十采油厂, 黑龙江大庆 163312
3.
中国石油大庆油田有限责任公司勘探开发研究院, 黑龙江大庆 163712
4.
东北石油大学, 黑龙江大庆 163318

基金项目:

黑龙江省自然科学基金优秀青年项目 YQ2019D002

详细信息

作者简介:
赵军(1988— ), 男, 工程师, 主要从事油气勘探目标评价工作。E-mail: 1255210168@qq.com

通讯作者:
李思涵(1972— ), 女, 高级工程师, 主要从事精细油藏描述工作。E-mail: 478118085@qq.com

中图分类号: P618.13
计量
- 文章访问数: 423
- PDF下载量: 18
- 被引次数: 0
出版历程
- 收稿日期: 2021-01-08

Analysis of microscopic pore structure and seepage mechanism of the Fuyang Oil Reservoir in Chaoyanggou Terrace

1.
Exploration and Development Research Institution of Dagang Oilfield Company Ltd, Tianjin 300280, China
2.
No. 10 Oil Production Plant, PetroChina Daqing Oilfield, Daqing Heilongjiang 163312, China
3.
Exploration and Development Research Institution of Daqing Oilfield Company Ltd, Daqing Heilongjiang 163712, China
4.
Northeast Petroleum University, Daqing Heilongjiang 163318, China

摘要

摘要:
基于扶余油层和杨大城子油层典型河道砂岩岩心样品，利用CT扫描物理实验和数字岩心重建技术，开展低渗透砂岩微观孔隙结构表征及渗流机理分析。通过矿物组分定量分析和扫描电镜拼图成像技术，识别出岩心矿物种类及其含量，划分出粒间孔、粒内孔和填隙物内孔共3种孔隙类型。针对总孔隙空间进行等效半径分布曲线计算，呈现明显的双峰结构，峰值主要集中在约50 μm和约1μm。利用重构的数字岩心模型模拟油水两相渗流，模拟结果显示，扶余油层油水共渗区较宽，残余油饱和度为30%~45%；杨大城子油层油水共渗区较窄，残余油饱和度为40%~55%。在毛管力和亲水性的作用下，水相优先进入小孔道，小孔道先于大孔道形成水锁，相较于扶余油层，杨大城子油层的喉道半径小，数量多，更易形成水锁，残余油饱和度较高。
- 扶余油层 /
- 杨大城子油层 /
- 数字岩心 /
- 孔隙结构 /
- 渗流机理 /
- 朝阳沟阶地
Abstract:
Based on the core samples of the typical channel sandstone from Fuyu and Yangdachengzi Reservoir, CT scanning physical experiments and digital core reconstruction technology were used to characterize the microscopic pore structure and analyze the seepage mechanism of low-permeability sandstone. By means of quantitative analysis of mineral composition and scanning electron microscopy, the types and contents of core minerals were identified, and three pore types were classified: intergranular pores, intragranular pores and interstitial pores. The equivalent radius distribution curve of the total pore space was calculated, showing an obvious bimodal structure, and the peak values were mainly approximately 50 μm and 1 μm. The reconstructed digital core model was used to simulate oil-water two-phase seepage. The simulation results showed that the oil-water coseepage zone of Fuyu Reservoir was wide and the residual oil saturation was approximately 30%-45% in the process of oilfield development. The residual oil saturation of Yangdachengzi Reservoir was approximately 40%-55%. Under the action of capillary force and hydrophilicity, the water phase preferably entered the small pore channel, and the small pore channel formed the water lock before the large pore channel. Compared with the Fuyu Reservoir, the throat radius of Yangdachengzi Reservoir was smaller, and the number was greater, which made it easier to form a water lock, and the residual oil saturation was higher.
- Fuyu reservoir /
- Yangdachengzi reservoir /
- digital core technology /
- pore structure /
- percolation mechanism /
- Chaoyanggou Terrace

HTML全文

图 1 松辽盆地北部白垩系沉积地层简表(据文献[13-14]修改)

Figure 1. Cretaceous sedimentary strata of the northern Songliao Basin

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图 2 松辽盆地北部构造区划图(据文献[17]修改)

Figure 2. Tectonic zoning of the northern Songliao Basin

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图 3 F22号岩石样品柱塞及柱塞子样Micro-CT扫描成果图

A.柱塞X-Y方向剖面；B.柱塞X-Z方向剖面；C.柱塞三维扫描图像; D.柱塞子样X-Y方向剖面；E.柱塞子样X-Z方向剖面；F.柱塞子样三维扫描图像

Figure 3. Micro-CT scanning results of the plunger and plunger sample of No. F22 rock sample

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图 4 5块岩石样品三维孔隙结构模型

Figure 4. Three-dimensional pore structure model of five rock samples

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图 5 5块岩石样品定量矿物组分扫描结果

Figure 5. Scanning results of the quantitative mineral composition of five rock samples

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图 6 5块岩石样品矿物类别含量(a)和黏土矿物体积分数(b)分布图

Figure 6. Distribution diagram of mineral category content (a) and clay mineral content (b) of five rock samples

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图 7 5块岩石样品绿泥石膜扫描电镜图

Figure 7. Scanning electron microscopy of chlorite film of five rock samples

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图 8 5块岩石样品伊利石填充孔隙扫描电镜图

Figure 8. Scanning electron microscopy of illite-filled pores of five rock samples

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图 9 2块岩石样品高岭石填充孔隙扫描电镜图

Figure 9. Scanning electron microscopy of the pore filled with kaolinite of two rock samples

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图 10 5块岩石样品粒间孔分布特征图

A1~A5.碎屑颗粒粒间孔；B1~B5.岩屑颗粒粒间孔；C1~C5.剩余颗粒粒间孔；D1~D5.溶蚀颗粒粒间孔

Figure 10. Distribution characteristics of intergranular pores of five rock samples

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图 11 5块岩石样品长石粒内溶蚀孔分布特征图

Figure 11. Distribution characteristics of dissolution pores in feldspar grains of five rock samples

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图 12 5块岩石样品等效半径分布曲线(a)和连通孔隙空间孔喉半径分布曲线(b)

Figure 12. Equivalent radius distribution curve (a) and pore throat radius distribution curve of connected pore space (b) of five rock samples

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图 13 黏土矿物聚焦离子束扫描成果

a~c.聚焦离子束扫描图像；d~f.聚焦离子束孔隙网络模型

Figure 13. Focus ion beam scanning results of clay minerals

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图 14 5块岩石样品油水相渗过程模拟曲线

Figure 14. Simulation curves of oil-water phase permeability of five rock samples

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表 1 实验样品编号及物性信息表

Table 1. No. of test sample and physical property information

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