高尚堡油田高3102断块沙三2+3亚段中低渗透储层可动流体赋存特征及其影响因素

陈儒贤; 侯加根

doi:10.19509/j.cnki.dzkq.tb20220184

高尚堡油田高3102断块沙三2+3亚段中低渗透储层可动流体赋存特征及其影响因素

doi: 10.19509/j.cnki.dzkq.tb20220184

陈儒贤^{a, b,},
侯加根^{a, b, ,}

a.
中国石油大学(北京)地球科学学院, 北京 102249
b.
中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249

详细信息

作者简介:
陈儒贤(1997—), 男, 助理工程师, 主要从事油气田开发地质方面的研究工作。E-mail: 1605283604@qq.com

通讯作者:
侯加根(1963—), 男, 教授, 主要从事油气田开发地质方面的研究工作。E-mail: jghou63@hotmail.com

中图分类号: P618.13
计量
- 文章访问数: 241
- PDF下载量: 21
- 被引次数: 0
出版历程
- 收稿日期: 2022-04-29
- 录用日期: 2022-09-08
- 修回日期: 2022-09-03

Occurrence characteristics and influencing factors of movable fluid in the medium- and low-permeability reservoirs of the Es₃²⁺³ submember of the Gao3102 fault block in the Gaoshangpu Oilfield

Chen Ruxian^{a, b
,},
Hou Jiagen^{a, b
, ,}

a.
College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China
b.
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China

摘要

摘要:
为了明确中低渗透储层可动流体赋存特征, 以期更好地指导油田增储上产, 以高尚堡油田高3102断块沙三2+3亚段中低渗透砂岩储层为研究对象, 基于薄片资料、全岩衍射分析、高压压汞曲线、密闭取心核磁共振资料、扫描电镜以及油水相渗曲线, 开展了不同孔隙结构储层可动流体的赋存特征及其影响因素研究。结果表明: ①不同孔隙结构储层可动流体饱和度差异较大。Ⅰ类中孔中喉型储层核磁共振T₂谱呈左低右高双峰型, 可动流体饱和度平均61.14%;Ⅱ类中小孔细喉型储层核磁共振T₂谱呈左高右高双峰型, 可动流体饱和度平均45.24%;Ⅲ类细孔微喉型储层核磁共振T₂谱呈左高右低双峰型, 可动流体饱和度平均30.45%;Ⅳ类微孔微喉型储层核磁共振T₂谱呈左高单峰型, 可动流体饱和度平均13.86%;②储层宏观物性、微观孔隙结构、黏土矿物含量以及储层润湿性共同控制可动流体赋存特征。其中微观孔隙结构是可动流体赋存的关键因素, 孔喉半径越大, 储层渗流能力越好, 黏土矿物含量越低, 储层润湿性越弱, 可动流体饱和度越高。该研究结果对高尚堡油田沙三2+3亚段储层高效注水开发提供合理科学依据。
- 高尚堡油田 /
- 沙三2+3亚段 /
- 微观孔隙结构 /
- 可动流体
Abstract: Objective
In order to clarify the occurrence characteristics of movable fluids in medium- and low-permeability reservoirs, so as to better guide the increase in oil reserves and production in the oilfield.
Methods
This study focuses on the medium- and low-permeability sandstone reservoirs in the Es₃²⁺³ submember of the Gao3102 fault block in the Gaoshangpu Oilfield. Based on thin section data, whole-rock diffraction analysis, high-pressure mercury injection curves, closed core nuclear magnetic resonance data, scanning electron microscopy, and oil-water phase permeability curves, the occurrence characteristics and influencing factors of movable fluids in reservoirs with different pore structures were conducted.
Results
The results show that (1) the movable fluid saturation of reservoirs with different pore structures varies greatly. The T₂ spectrum of the nuclear magnetic resonance of the class Ⅰ medium porosity and medium throat reservoir is bimodal with left low and right thigh, and the average saturation of movable fluid is 61.14%. The T₂ spectrum of the nuclear magnetic resonance of the class Ⅱ medium and small pore fine throat reservoir shows a double peak type with left high and right high, and the average of movable fluid saturation is 45.24%. The T₂ spectrum of the nuclear magnetic resonance of the class Ⅲ fine porous micro throat reservoir shows a double peak type of left high and right low, and the average of movable fluid saturation is 30.45%. The T₂ spectrum of the nuclear magnetic resonance of the class Ⅳ microporous micro throat reservoir shows a left high single peak, and the average saturation of movable fluid is 13.86%. (2) The macroscopic physical properties, microscopic pore structure, clay mineral content and reservoir wettability of the reservoir jointly control the occurrence characteristics of the movable fluid. Among them, the microscopic pore structure is a key factor in the occurrence of movable fluid. The larger the pore throat radius is, the better the reservoir seepage capacity, the lower the clay mineral content is, the weaker the reservoir wettability is, and the higher the movable fluid saturation is.
Conclusion
The results of this research can provide a reasonable scientific basis for high-efficiency water injection development of the Es₃²⁺³ reservoir in the Gaoshangpu Oilfield.
- Gaoshangpu Oilfield /
- Es₃²⁺³ submember /
- microscopic pore structure /
- movable fluid
注释:

(所有作者声明不存在利益冲突)

HTML全文

图 1 高3102断块构造位置图及地层综合柱状图^[25]

a.渤海湾盆地构造格局；b.高尚堡深层Es₃²⁺³亚段油藏构造图；c.高3102断块Es₃²⁺³亚段Ⅲ油组顶面构造图; d.地层划分柱状图

Figure 1. Structural location map and comprehensive histogram of the Gao 3102 fault block in the study area

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图 2 高3102断块沙三2+3亚段岩石学特征

Figure 2. Petrological characteristics of the Es₃²⁺³ submember in the Gao3102 fault block

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图 3 高3102断块沙三2+3亚段储层物性特征

Figure 3. Reservoir physical properties of the Es₃²⁺³ submember in the Gao 3102 fault block

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图 4 高尚堡油田高3102断块沙三2+3亚段储层微观孔隙特征相片

a.长石岩屑砂岩，发育粒间孔，粒间溶孔，GJ3102-8井，蓝色铸体薄片(单偏光)，3 499.04 m；b.长石岩屑砂岩，残余粒间孔为主，GJ3102-8井，蓝色铸体薄片(单偏光)，3 519.12 m；c.岩屑砂岩，发育粒内溶孔，GJ3102-8井，蓝色铸体薄片(单偏光)，3 490.76 m；d.长石砂岩，铸模孔，颗粒溶孔，GJ3102-8井，蓝色铸体薄片(单偏光)，3 513.96 m；e.绿泥石晶间微孔，GJ3102-8井，扫描电镜, 3 490.76 m；f.微裂缝，GJ3102-8井，铸体薄片(单偏)，3 429.46 m

Figure 4. Microscopic pore characteristic photos of the Es₃²⁺³ submember in the Gao3102 fault block of the Gaoshangpu Oilfield

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图 5 高尚堡油田高3102断块沙三2+3亚段储层空间类型特征

Figure 5. Reservoir space type characteristics of the Es₃²⁺³ submember in the Gao3102 fault block of the Gaoshangpu Oilfield

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图 6 高3102断块沙三2+3亚段不同孔隙结构高压压汞曲线和孔喉半径分布

S_max为最大压汞饱和度; P_d为排驱压力

Figure 6. High pressure mercury injection curves of different pore structures in the Es₃²⁺³ submember of the Gao3102 fault block

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图 7 核磁共振T₂截止值的确定

Figure 7. Determination of the cut-off value of NMR T₂

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图 8 高3102断块沙三2+3亚段不同孔隙结构储层核磁共振T₂谱图

Figure 8. NMR T₂ spectra of reservoirs with different pore structures in the Es₃²⁺³ submember of the Gao3102 fault block

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图 9 高3102断块沙三2+3亚段不同孔隙结构储层油水相对渗透率

K_ro.油相相对渗透率；K_rw.水相相对渗透率

Figure 9. Relative permeability of oil and water in reservoirs with different pore structures in the Es₃²⁺³ sub member of the Gao3102 fault block

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图 10 高3102断块沙三2+3亚段可动流体饱和度与储层物性相关性分析

Figure 10. Relationship between reservoir physical properties and movable fluid saturation of the Es₃²⁺³ sub member in the Gao3102 fault block

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图 11 高3102断块沙三2+3亚段孔可动流体饱和度与储层孔喉结构参数相关性分析

Figure 11. Relationship between pore throat structure parameters and movable fluid saturation of the Es₃²⁺³ sub member in the Gao3102 fault block

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图 12 高3102断块沙三2+3亚段可动流体饱和度与储层黏土矿物成分的相关性分析

Figure 12. Caly minerals and movable fluid saturation of the Es₃²⁺³ sub member in the Gao3102 fault block

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图 13 高3102断块沙三2+3亚段储层典型微观扫描电镜相片

a.绿泥石，微晶石英填充，GJ-314号样品; b.绿泥石，微晶石英填充，GJ-204号样品; c.方解石发橙色光，GJ-206号样品; d.伊利石及微孔，GJ-197号样品

Figure 13. Typical microscopic scanning electron microscope photos of the Es₃²⁺³ sub member reservoir in the Gao3102 fault block

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图 14 高3102断块沙三2+3亚段可动流体饱和度与储层润湿指数的相关性分析

Figure 14. Wettability index and movable fluid saturation of the reservoir of the Es₃²⁺³ submember reservoir in the Gao3102 fault block

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表 1 高3102断块沙三2+3亚段储层不同孔隙结构特征参数

Table 1. Characteristic parameters table of different pore structures in the Es₃²⁺³ submember of the Gao3102 fault block

代表样品编号	孔隙结构分类	排驱压力/MPa	平均孔喉半径/μm	最大孔喉半径/μm	均质系数	分选系数	退汞效率/%	最大进汞饱和度/%	孔隙度/%	渗透率/10^-3 μm²
GJ-45	Ⅰ类	0.010	8.446	73.640	0.115	9.155	51.57	90.79	18.30	116.00
GJ-38	Ⅰ类	0.032	6.780	65.230	0.320	5.320	39.62	80.05	16.60	101.60
GJ-393	Ⅱ类	0.049	6.640	16.840	0.480	4.849	35.12	82.91	13.90	66.30
GJ-409	Ⅱ类	0.073	3.490	10.010	0.370	3.250	41.87	74.20	16.40	35.70
GJ-314	Ⅲ类	0.301	1.540	3.389	0.236	0.588	31.50	63.34	13.68	7.59
GJ-197	Ⅲ类	0.308	0.550	2.390	0.230	1.220	33.55	52.33	14.60	2.86
GJ-204	Ⅳ类	0.550	0.246	1.442	0.180	0.321	80.20	27.03	7.50	0.85
GJ-206	Ⅳ类	2.068	0.069	0.356	0.187	0.063	21.10	20.26	7.20	2.06

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表 2 高3102断块沙三2+3亚段储层核磁共振T₂谱及渗流参数

Table 2. NMR T₂ spectrum and seepage parameters of the reservoir in the Es₃²⁺³ submember of the Gao3102 fault block

代表样品编号	样品深度/m	岩性	孔隙结构类型	T₂谱类型	可动流体饱和度/%	T₂截止值/ms	S_wx/%	K_rwm/%	W_i
GJ-45	3 431.24	粗粒岩屑长石砂岩	Ⅰ类	左低右高双峰	61.14	12.30	47.20	55.3	20.31
GJ-38	3 430.36	巨-粗粒长石岩屑砂岩	Ⅰ类	左低右高双峰	63.66	11.20	51.00	42.0	29.50
GJ-393	3 511.48	中粒岩屑长石砂岩	Ⅱ类	左高右高双峰	45.24	6.57	53.50	20.2	87.60
GJ-409	3 513.78	粗粒长石岩屑砂岩	Ⅱ类	左高右高双峰	40.04	8.10	51.70	13.1	116.92
GJ-314	3 499.04	不等粒岩屑长石砂岩	Ⅲ类	左高右低双峰	30.45	3.66	50.50	13.6	119.93
GJ-197	3 483.12	细粒岩屑长石砂岩	Ⅲ类	左高右低双峰	22.11	3.22	51.70	10.0	181.50
GJ-204	3 483.84	巨粒长石岩屑砂岩	Ⅳ类	左高单峰型	13.86	3.20	65.30	5.0	601.00
GJ-206	3 484.18	含碳酸盐砂质砾岩	Ⅳ类	左高单峰型	14.87	2.13	64.65	6.1	449.20
注：S_wx为油水相渗交点处含水饱和度；K_rwn为最大含水饱和度下水相相对渗透率；W_i为润湿指数

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表 3 高3102断块沙三2+3亚段储层典型岩心样品的黏土矿物X射线分析结果

Table 3. X-ray analysis results of clay minerals of typical core samples from the in Es₃²⁺³ sub member reservoir in the Gao3102 fault block

样品编号	孔隙结构类型	黏土矿物相对质量分数/%				伊/蒙混层比/%	黏土矿物绝对质量分数/%
样品编号	孔隙结构类型	绿泥石	伊蒙混层	高岭石	伊利石	伊/蒙混层比/%	黏土矿物绝对质量分数/%
GJ-45	Ⅰ类	53.8	13.4	28.0	4.8	54	3.8
GJ-38	Ⅰ类	42.1	21.3	27.7	8.9	55	4.4
GJ-393	Ⅱ类	51.7	21.3	20.5	6.5	51	4.9
GJ-409	Ⅱ类	65.5	12.9	18.7	2.9	50	4.0
GJ-314	Ⅲ类	66.9	14.3	16.5	2.3	68	4.8
GJ-197	Ⅲ类	56.7	16.5	20.8	6.0	55	5.8
GJ-204	Ⅳ类	43.2	27.8	23.4	5.6	54	4.7
GJ-206	Ⅳ类	22.3	53.6	15.2	8.9	78	7.5

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