江汉盆地潜江凹陷古近系潜江组盐间可动页岩油赋存空间多尺度表征

孙中良; 王芙蓉; 韩元佳; 侯宇光; 何生; 罗京; 郑有恒; 吴世强

doi:10.11781/sysydz202004586

江汉盆地潜江凹陷古近系潜江组盐间可动页岩油赋存空间多尺度表征

doi: 10.11781/sysydz202004586

1.
中国地质大学构造与油气资源教育部重点实验室, 武汉 430074
2.
中国石化江汉油田分公司勘探开发研究院, 武汉 430223

基金项目:

国家科技重大专项 2017ZX05049-005

国家自然科学基金项目 41772143

国家自然科学基金项目 41830431

详细信息

作者简介:
孙中良(1993-), 男, 硕士研究生, 从事非常规油气地质研究。E-mail: 995974375@qq.com

通讯作者:
王芙蓉(1979-), 女, 博士, 副教授, 从事储层沉积和成岩作用等研究。E-mail: wfr777@163.com

中图分类号: TE135
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- 被引次数: 0
出版历程
- 收稿日期: 2020-01-18
- 修回日期: 2020-05-20
- 刊出日期: 2020-07-28

Multi-scale characterization of the spatial distribution of movable hydrocarbon in intersalt shale of Qianjiang Formation, Qianjiang Sag, Jianghan Basin

1.
Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geoscience, Wuhan, Hubei 430074, China
2.
Research Institute of Exploration and Development, SINOPEC Jianghan Oilfield Branch Company, Wuhan, Hubei 430223, China

摘要

摘要: 为更精细地刻画可动页岩油赋存的孔隙空间特征，通过对比抽提前后样品在低温氮气吸附实验的吸附量变化、高压压汞实验的进汞量变化以及场发射扫描电镜中的孔径变化特征，来表征可动页岩油赋存的孔隙空间。研究表明，江汉盆地潜江凹陷古近系潜江组Eq₃⁴-10韵律可动页岩油主要赋存在微、纳米级的白云石晶间孔、粒间孔以及黏土矿物层间孔中，纹层状发育的页岩可动页岩油较为富集。以孔径80 nm为界拼接低温氮吸附和高压压汞测试孔径，结果表明，可动页岩油主要赋存在孔径小于200 nm的范围内，微米级孔隙内也有赋存，90~200 nm孔径范围内可动页岩油赋存相对较多。黏土矿物含量较低的样品，在孔径小于等于5 nm的范围内抽提出可动页岩油。孔隙度越高，平均孔径越大，可动页岩油越富集。
- 可动页岩油 /
- 多尺度 /
- 赋存空间 /
- 潜江组 /
- 潜江凹陷 /
- 江汉盆地
Abstract: Pore space containing mobile shale oil was more precisely characterized by comparing the change of adsorption volume of low-temperature nitrogen experiments and the change of mercury intake volume in high-pressure mercury injection experiments and the change of pore diameter using field emission scanning electron microscopy. The Eq₃⁴-10 rhythmic mobile hydrocarbon mainly occurs in dolomitic intercrystalline/intergranular pores and clay mineral interbedded pores, and movable hydrocarbon is relatively rich in lamellar shale. Low temperature nitrogen adsorption and high-pressure mercury injection measurements of pore size were spliced with pore size of 80 nm, and the results showed that movable hydrocarbon mainly occurs in the range of pore size less than 200 nm, and also occurs in the micron sized pores. Relatively more movable shale oil occurs in pores from 90 nm to 200 nm. The samples with low clay mineral content can yield movable hydrocarbon within the pores of ≤5 nm. The higher the porosity, the larger the average pore size, and the richer the movable shale oil.
- movable shale oil /
- multi-scale /
- occurrence spatial /
- Qianjiang Formation /
- Qianjiang Sag /
- Jianghan Basin

HTML全文

图 1 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律有利区分布及取样位置^[28]

Figure 1. Advantageous reservoir distribution and sampling location of Eq₃⁴-10 rhythm of Qianjiang Formation

下载: 全尺寸图片幻灯片

图 2 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩油样品孔隙特征及可动页岩油赋存空间

Figure 2. Pore characteristics and movable hydrocarbon occurrence space of shale samples of Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 3 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩样品抽提前后比孔容分布特征

Figure 3. Specific pore volume distribution characteristics before and after extraction of shale samples in Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 4 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩样品抽提前后不同孔径进汞量分布曲线

Figure 4. Distribution curves of mercury in different pore sizes of shale samples of Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 5 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩样品抽提前后孔隙分布特征

A₁、A₂未抽提；B₁、B₂已抽提

Figure 5. Pore distribution before and after extraction of shale samples of Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 6 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩样品S₁与抽提前后孔体积差值的相关性

Figure 6. Correlation between S₁ and specific pore volume difference before and after extraction of shale samples of the Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 7 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩样品不同孔径下比孔容分布

Figure 7. Specific pore volume distribution of shale samples of Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 8 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩样品抽提前后进汞量分布

Figure 8. Distribution characteristics of mercury injection content before and after extraction of shale samples of Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 9 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩样品可动页岩油分布孔径特征

Figure 9. Pore size characteristics of movable hydrocarbon distribution in shale samples of Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 10 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩样品抽提前后的孔径分布

Figure 10. Characteristics of percentage change of pore diameter distribution before and after extraction in shale samples of Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 11 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩样品中可动页岩油与各影响因素的关系

Figure 11. Relationship between movable shale oil and influencing factors in shale samples of Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

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表 1 江汉盆地潜江凹陷潜江组页岩样品地化特征及矿物组成

Table 1. Geochemical characteristics and mineral composition of shale samples from Qianjiang Formation in Qianjiang Sag, Jianghan Basin

样品号	深度/m	岩性	S₁/(mg·g^-1)	w(TOC)/%	矿物成分/%
样品号	深度/m	岩性	S₁/(mg·g^-1)	w(TOC)/%	黏土	石英	长石	方解石	白云石	黄铁矿	石盐	硬石膏	透闪石	石膏
BYY2-21	2 814.45	褐色灰质泥岩	4.24	1.83	9.13	13.87	21.37	36.25	15.17	1.94	2.27	-	-	-
BYY2-28	2 814.67	深灰色云质页岩	7.25	2.40	-	7.09	7.68	13.50	64.42	4.28	3.03	-	-	-
BYY2-90	2 817.11	褐色页岩	9.85	2.44	19.96	8.60	28.35	5.17	29.71	2.68	1.95	3.59	-	-
BYY2-101	2 817.51	深灰色页岩	7.91	2.05	19.64	8.4	30.39	13.49	22.13	1.68	0.85	-	3.43	-
BYY2-161	2 820.23	褐色云质泥岩	7.18	1.15	15.50	9.52	20.54	1.60	44.38	1.70	2.22	2.11	-	2.43

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表 2 江汉盆地潜江凹陷潜江组Eq₃⁴-10韵律页岩样品抽提物族组分含量

Table 2. Component content of extract group in shale samples of Eq₃⁴-10 rhythm of Qianjiang Formation in Qianjiang Sag, Jianghan Basin

样品号	饱和烃	芳香烃	胶质	沥青质
BYY2-21	0.42	0.23	0.12	0.23
BYY2-28	0.37	0.19	0.11	0.33
BYY2-90	0.46	0.23	0.13	0.18
BYY2-101	0.39	0.21	0.13	0.27
BYY2-161	0.36	0.24	0.16	0.24

下载: 导出CSV

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