CO<sub>2</sub>驱油及地质埋存适宜度三阶段三类三维表征与评价

王泽宇; 欧成华; 肖富润; 李航; 郭培培; 权昊森; 闫博; 彭仕轩

doi:10.19509/j.cnki.dzkq.tb20230498

CO₂驱油及地质埋存适宜度三阶段三类三维表征与评价

doi: 10.19509/j.cnki.dzkq.tb20230498

王泽宇^1a,,
欧成华^{1a, 1b, ,},
肖富润^1a,
李航^1a,
郭培培^1a,
权昊森^1a,
闫博²,
彭仕轩³

1a.
西南石油大学石油与天然气工程学院
1b.
西南石油大学油气藏地质及开发工程全国重点实验室，成都 610500
2.
中国石油吐哈油田分公司勘探开发研究院，新疆哈密 838202
3.
中国石油西南油气田分公司开发事业部，成都 610500

基金项目: 四川省科技计划项目（2024NSFSC1960）

详细信息

作者简介:
王泽宇：E-mail：3528189968@qq.com

通讯作者:
E-mail：cho-mm@163.com

中图分类号: TE357.45
计量
- 文章访问数: 90
- PDF下载量: 6
- 被引次数: 0
出版历程
- 收稿日期: 2023-08-28
- 录用日期: 2024-02-01
- 修回日期: 2024-01-17
- 网络出版日期: 2025-02-18

Three-stage, three-category, three-dimensional characterization and evaluation of CO₂ enhanced oil recovery and geological carbon storage

WANG Zeyu^{1a
,},
OU Chenghua^{1a, 1b
, ,},
XIAO Furun^1a,
LI Hang^1a,
GUO Peipei^1a,
QUAN Haosen^1a,
YAN Bo²,
PENG Shixuan³

1a.
Southwest Petroleum University Petroleum Engineering School
1b.
Southwest Petroleum University National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
2.
Research Institute of Exploration and Development, Tuha Oilfield Company, PetroChina, Hami Xinjiang 838202, China
3.
Development Departmen, Southwest Oil and Gas Field Company, PetroChina, Chengdu 610500, China

More Information

Author Bio:
E-mail：3528189968@qq.com

Corresponding author: E-mail：cho-mm@163.com

摘要

摘要:
为实现CO₂驱油及地质埋存适宜度、驱油量及埋存量表征与评价，在开发中后期油藏中充分考虑CO₂驱油及地质埋存机制的阶段性差异，提出了CO₂驱油及地质埋存适宜度的三阶段三类三维表征与评价方法。首先，开展CO₂驱油及地质埋存适宜度分阶段分类研究，包括基于5因素法的CO₂驱油-物理埋存阶段适宜度分类、基于6因素法的CO₂驱油-物理化学埋存阶段适宜度分类、基于6因素法的CO₂化学埋存阶段适宜度分类。然后，实施CO₂驱油及地质埋存适宜度三阶段三类三维表征与评价，包括基于埋存系数法的CO₂驱油量可视化分级分类评价、基于埋存系数法的CO₂埋存量可视化分级分类评价。将提出的三阶段三类三维表征与评价方法应用于中国东部某典型低孔、特低渗油藏，先后建立了适宜度三阶段三类标准、适宜度三阶段三类三维模型、每个阶段各类储集体的驱油量与埋存量三维模型，计算出实例区三阶段各类储集体CO₂驱油量648.24 t、埋存量2956.84 t，表征了各阶段各类储集体CO₂驱油及地质埋存的空间分布特征，为下一步CO₂捕获、利用和存储（CO₂ capture，utilization and storage，简称CCUS）项目精细化作业提供了技术支撑。
- CO₂驱油及地质埋存 /
- 分阶段分类评价 /
- 三维表征 /
- 驱油量 /
- 埋存量
Abstract: Objective
This study aims to propose a novel three-stage, three-category, three-dimensional characterization and evaluation method for CO₂-enhanced oil recovery (EOR) and geological carbon storage (GCS).
Methods
This method assesses the suitability, oil recovery, and storage capacity of these projects while addressing the distinct phase differences in the mechanisms of CO₂ EOR and GCS during the later stages of reservoir development. This method involves the classification of CO₂ EOR and GCS suitability into three stages: 1) physical storage suitability classification based on the five-factor method; 2) physicochemical storage suitability classification based on the six-factor method; and 3) chemical storage suitability classification based on the six-factor method. Additionally, this method provides a three-dimensional characterization and evaluation of CO₂ EOR and GCS. It includes a visualization-based classification and assessment of the CO₂ oil recovery amount and storage capacity using the storage coefficient method. The proposed evaluation framework has been applied to a representative low-porosity and ultralow-permeability reservoir in eastern China.
Results
The calculated CO₂ oil recovery and storage capacity for the sample area are 648.24 tons and 2956.84 tons, respectively. These results highlight the spatial distribution characteristics of CO₂ EOR and GCS at each stage and type. Ultimately, this three-stage, three-category, three-dimensional characterization and evaluation method offers vital technical support for refining CCUS projects and provides meaningful insights for subsequent operations.
Conclusion
The findings contribute to the scientific and rational planning and implementation of CO₂ EOR and GCS projects, facilitating the sustainable development of oil and gas fields and enhancing resource utilization efficiency.
- CO₂ enhanced oil recovery (EOR) and geological carbon storage (GCS) /
- phased classification evaluation /
- 3D characterization /
- oil recovery amount /
- storage capacity

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图 1 技术方案流程图

Figure 1. Technical solution flow chart

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图 2 实例区W1井单井柱状图

Figure 2. Single column diagram of Well W1 in the example area

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图 3 实例区CO₂驱油及地质埋存适宜度三阶段分类三维建模结果

Figure 3. Three-stage, 3D model of CO₂ EOR and GCS in the example area

下载: 全尺寸图片幻灯片

图 4 实例区CO₂驱油及地质埋存适宜度各阶段各类储集体驱油量三维建模结果（图例同图3）

Figure 4. Oil recovery quantities 3D model results of buried stock during different stages of CO₂ EOR and GCS in the example area

下载: 全尺寸图片幻灯片

图 5 实例区CO₂驱油及地质埋存适宜度各阶段各类埋存量三维建模结果（图例同图3）

Figure 5. Storage capacity 3D model results of buried stock in different stages of CO₂ EOR and GCS in the example area

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表 1 CO₂驱油及地质埋存适宜度评价指标体系

Table 1. Evaluation index system for CO₂ EOR and GCS suitability

评价指标		权重	好	较好	中等	较差	差
油藏特征（权重0.423）	油藏温度/℃	0.445	[60, 70)	[70, 80)	[80, 90)	[90, 100]	>100
	油藏温度/℃	0.445	[60, 70)	[50, 60)	[40, 50)	[30, 40)	<30
	油藏压力/MPa	0.326	[8, 10)	[10, 12)	[12, 14)	[14, 16]	>16
	油藏压力/MPa	0.326	[8, 10)	[6, 8)	[4, 6)	[2, 4)	<2
	油藏深度/m	0.229	[900, 1500)	[1500, 2000)	[2000, 2500)	[2500, 3000]	>3000
	油藏深度/m	0.229	[900, 1500)	[800, 900)	[700, 800)	[600, 700)	<600
储层特征（权重0.354）	渗透率/10⁻³ um²	0.371	≥8	[1, 8)	[0.1, 1)	[0.01, 0.1)	<0.01
	孔隙度/%	0.371	≥16	[12, 16)	[8, 12)	[2, 8)	<2
	储层厚度/m	0.258	[100, 10)	[1, 7)	[7, 4)	[4, 1]	<1或>100
流体特征（权重0.223）	原油饱和度/%	0.189	>60		[60, 40]		<40
	原油密度/（g·m⁻³）	0.351	<0.80	[0.80, 0.83)	[0.83, 0.86)	[0.86, 0.89]	>0.89
	原油黏度/（mPa·s）	0.351	<5	[5, 100)	[100, 200)	[200, 300]	>300
	地层水矿化度/（mg·L⁻¹）	0.109	>150	[100, 150]	[50, 100)	[30, 50)	<30

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表 2 实例区单井解释油层、油水同层、水层统计

Table 2. Statistics of oil, oil-water and water layers of single well in the example area

储集体类型	油层	油水同层	水层	累计
平均厚度/m	57.26	36.82	12.90	35.66
占比/%	0.53	0.34	0.13	1.00

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表 3 实例区CO₂驱油及地质埋存适宜度三阶段分类标准

Table 3. Three-stage standard of CO₂ EOR and GCS in the example area

阶段	物理埋存阶段			物理化学埋存阶段			化学埋存阶段
适宜度分类	Ⅰ类（好）	Ⅱ类（中）	Ⅲ类（差）	Ⅰ类（好）	Ⅱ类（中）	Ⅲ类（差）	Ⅰ类（好）	Ⅱ类（中）	Ⅲ类（差）
孔隙度/%	≥16	[12, 16)	[8, 12)	≥16	[12, 16)	[8, 12)	≥16	[12, 16)	[8, 12)
渗透率/10⁻³μm²	≥8	[1, 8)	[0.1, 1)	≥8	[1, 8)	[0.1, 1)	≥8	[1, 8)	[0.1, 1)
含油饱和度/%	≥90	[70, 90)	[60, 70)	[50, 60]	[40, 50)	[30, 40)	≥90	[70, 90)	[60, 70)
盖层厚度/m	Ⅰ类盖层≥1，Ⅱ类盖层≥2
埋存层厚度/m	≥2	≥1	≥0.5	≥2	≥1	≥0.5	≥2	≥1	≥0.5
原油密度/（t·m⁻³）	≤0.76	(0.76, 0.77)	≥0.77	≤0.76	(0.76, 0.77)	≥0.77
地层水矿化度/（mg·L⁻¹）				[1000, 1500]	[500, 1000)	[300, 500)	[5000, 10000]	[2000, 5000)	[1500, 2000)
温度/℃	100～140
压力/MPa	28～44
油藏深度/m	≥3000
水型	CaCl₂

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表 4 各阶段各类储集体CO₂驱油量可视化计算结果

Table 4. Calculation results of visual classification of CO₂ displacement of different stages and different classifications

阶段	CO₂驱油-物理埋存阶段			CO₂驱油-物理化学埋存阶段			合计
适宜度分类	Ⅰ类	Ⅱ类	Ⅲ类	Ⅰ类	Ⅱ类	Ⅲ类	合计
原油储量/t	1363.35	1435.10	486.34	550.12	802.60	191.35	4828.86
驱油量/t	272.67	215.27	48.63	44.01	56.18	11.48	648.24

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表 5 CO₂ 的埋存量可视化分类计算结果

Table 5. Calculation results of visual classification of CO₂ storage

阶段	CO₂驱油-物理埋存阶段			CO₂驱油-物理化学埋存阶段			CO₂化学埋存阶段			合计
适宜度分类	Ⅰ类	Ⅱ类	Ⅲ类	Ⅰ类	Ⅱ类	Ⅲ类	Ⅰ类	Ⅱ类	Ⅲ类	合计
物理埋存量/t	674.86	532.78	120.37	108.92	139.05	28.42				1604.39
化学埋存量/t				162.29	259.67	54.10	332.32	323.04	221.03	1352.45
合计/t	1328.01			752.45			876.39			2956.84

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