黔南坳陷二叠纪玄武质火山活动对含煤泥页岩储层的影响

李欣诚; 侯宇光; 陈振宏; 何生; 梁雅琪; 刘宇坤; 宋颖睿; 余锐

doi:10.11781/sysydz202104620

黔南坳陷二叠纪玄武质火山活动对含煤泥页岩储层的影响

doi: 10.11781/sysydz202104620

1.
中国地质大学(武汉) 构造与油气资源教育部重点实验室，武汉 430074
2.
中国石油天然气集团有限公司勘探开发研究院，北京 100083
3.
湖北省地质实验测试中心，武汉 430034
4.
中国科学院地质与地球物理研究所，中国科学院油气资源研究重点实验室，北京 100029

基金项目:

国家重点研发计划 2017YFE0106300

国家自然科学基金项目 41772143

中国地质调查局项目 DD20190561-1

国家科技重大专项子课题 2016ZX05034002-003

详细信息

作者简介:
李欣诚(1996—)，男，硕士研究生，从事页岩油气富集机理方面研究。E-mail: 821670843@qq.com

通讯作者:
侯宇光(1979—)，男，博士，副教授，博士生导师，从事油气成藏、非常规油气地质方面研究。E-mail: sporthyg@126.com

中图分类号: TE122.221
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出版历程
- 收稿日期: 2020-04-12
- 修回日期: 2021-05-14
- 刊出日期: 2021-07-28

Influence of Permian basaltic volcanic activity on coal-bearing shale reservoirs, Southern Guizhou Depression

1.
Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences (Wuhan), Wuhan, Hubei 430074, China
2.
PetroChina Exploration and Development Research Institute, Beijing 100083, China
3.
Hubei Geological Research Laboratory, Wuhan, Hubei 430034, China
4.
Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

摘要

摘要: 为了研究火山活动对泥页岩储层的影响，以黔南坳陷二叠纪峨眉山玄武岩对龙潭组泥页岩储层的影响为例，通过总有机碳含量、XRD、镜质体反射率以及低温氮气及二氧化碳吸附等方法，研究了火山活动对含煤泥页岩生烃、矿物成分以及储层孔隙结构等方面的影响。研究表明：火山活动对含煤泥页岩的生烃、矿物组成和孔隙结构存在明显的影响；火山活动显著促进了泥页岩的有机质成熟演化，使其迅速进入到了过成熟阶段(R_o从2.0%增加到2.88%)，加快了烃源岩的生排烃效率；随着与岩浆岩距离的减小，石英和碳酸盐矿物含量增加，黏土矿物含量减小，伊利石和绿泥石含量呈现规律变化，指示了泥页岩成岩演化也受到了一定的影响；火山活动带来的热源对泥页岩储层孔隙的形成演化产生了重要的影响，随着距离岩浆岩越近，含煤泥页岩储层中的微孔占比逐渐增高，介孔和宏孔含量呈下降趋势，推测火山活动的热作用促进了有机质孔隙的生成，同时也影响了无机孔隙的发育。
- 成熟度 /
- 矿物组成 /
- 孔隙结构 /
- 泥页岩储层 /
- 火山活动 /
- 二叠纪 /
- 黔南坳陷
Abstract: To investigate the influences of volcanic activities on shale reservoirs, a case study was carried out on the Permian Mount Emei basalt and coal-bearing shale of Longtan Formation in the Southern Guizhou Depression. Based on the analytical results of total organic carbon content, XRD, vitrinite reflectance and cryogenic nitrogen and carbon dioxide adsorptions, the effects of volcanic activities on the hydrocarbon generation, mineral composition and reservoir microstructure of coal-bearing shale were discussed. The results showed that volcanic activities had obvious effects on the hydrocarbon generation, mineral composition and pore structure of coal-bearing shale. They significantly promoted the evolution and maturation of organic matters in shale, which quickly entered the over-mature stage (R_o% increased from 2.0% to 2.88%), and accelerated the hydrocarbon generation and expulsion efficiency. With the decrease of the distance to the basalt, the contents of clastic minerals and carbonate minerals increased, the content of clay minerals decreased, and the contents of illite and chlorite changed regularly, which indicated that the evolution of shale diagenesis had also been affected to a certain extent. The heat brought by volcanic activities had an important influence on the pores of reservoirs. As it got closer to basalt, the proportion of micropores increased while the content of mesopores and macropores decreased. It was speculated that the thermal effects of volcanic activities promoted the formation of organic pores and also affected the development of inorganic pores.
- maturity /
- mineral composition /
- pore structure /
- shale reservoir /
- volcanic activity /
- Permian /
- Southern Guizhou Depression

HTML全文

图 1 峨眉山玄武岩及研究区分布(a)、黔南坳陷区域构造单元划分(b)、AS-1井岩性柱状图及样品位置(c)

Figure 1. Mount Emei basalt and location of research area (a), regional structural units of Southern Guizhou Depression (b), lithologic histogram and sampling location of well AS-1(c)

下载: 全尺寸图片幻灯片

图 2 黔南坳陷AS-1井二叠系龙潭组含煤泥页岩全岩及黏土矿物含量

Figure 2. Whole rock (a) and clay mineral (b) contents of coal-bearing shale in Permian Longtan Formation, well AS-1, Southern Guizhou Depression

下载: 全尺寸图片幻灯片

图 3 黔南坳陷AS-1井二叠系龙潭组二氧化碳吸附等温曲线

Figure 3. Isotherm curves of carbon dioxide adsorption of Permian Longtan Formation, well AS-1, Southern Guizhou Depression

下载: 全尺寸图片幻灯片

图 4 黔南坳陷AS-1井二叠系龙潭组氮气吸附—脱附等温曲线

Figure 4. Isotherm curves of nitrogen adsorption and desorption of Permian Longtan Formation, well AS-1, Southern Guizhou Depression

下载: 全尺寸图片幻灯片

图 5 黔南坳陷AS-1井二叠系龙潭组孔隙体积(a)、比表面积(b)与平均孔隙直径的关系

Figure 5. Correlations between average pore diameter and pore volume (a) and specific surface area (b) of Permian Longtan Formation, well AS-1, Southern Guizhou Depression

下载: 全尺寸图片幻灯片

图 6 黔南坳陷AS-1井二叠系龙潭组含煤泥页岩样品实验数据分布

Figure 6. Experimental data distribution of coal-bearing shale in Permian Longtan Formation, well AS-1, Southern Guizhou Depression

下载: 全尺寸图片幻灯片

表 1 黔南坳陷AS-1井二叠系龙潭组含煤泥页岩样品N₂和CO₂气体吸附测试结果

Table 1. Test results of N₂ and CO₂ adsorptions of coal-bearing shale in Permian Longtan Formation, well AS-1, Southern Guizhou Depression

样品编号	体积/(cm³·g^-1)			比表面积/(m²·g^-1)
样品编号	微孔	介孔	宏孔	微孔	介孔	宏孔
AS-Y03	0.056	0.002	0.008	190.268	0.410	0.261
AS-Y05	0.055	0.002	0.007	182.937	0.279	0.217
AS-Y07	0.037	0.002	0.007	125.215	0.223	0.221
AS-Y09	0.049	0.002	0.009	165.33	0.305	0.293
AS-Y11	0.055	0.001	0.006	184.311	0.276	0.184
AS-Y12	0.061	0.001	0.004	207.66	0.225	0.124
AS-Y13	0.060	0.001	0.002	209.959	0.142	0.055
AS-Y14	0.059	0.001	0.002	203.882	0.135	0.079
AS-Y16	0.061	0.002	0.001	212.138	0.161	0.083
AS-Y19	0.059	0.001	0.003	204.052	0.222	0.090

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