“多层叠置独立含煤层气系统”形成的沉积控制因素

沈玉林; 秦勇; 郭英海; 易同生; 邵玉宝; 金洪波

doi:10.3799/dqkx.2012.064

“多层叠置独立含煤层气系统”形成的沉积控制因素

doi: 10.3799/dqkx.2012.064

沈玉林^{1, 2,},
秦勇^{1, 2},
郭英海^{1, 2},
易同生³,
邵玉宝¹,
金洪波¹

1.
中国矿业大学资源学院, 江苏徐州 221116
2.
中国矿业大学煤层气资源与成藏过程教育部重点实验室, 江苏徐州 221008
3.
贵州省煤田地质局, 贵州贵阳 550006

基金项目:

国家自然科学基金青年基金项目 41102100

国家自然科学基金重点项目 40730422

中央高校基本科研业务费专项资金课题 2010QNA52

详细信息

作者简介:
沈玉林(1981-), 男, 讲师, 博士后, 主要从事沉积学研究.E-mail: yulinsh@sohu.com

中图分类号: P618.11
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- 被引次数: 0
出版历程
- 收稿日期: 2011-10-20
- 网络出版日期: 2021-11-09
- 刊出日期: 2012-05-01

Sedimentary Controlling Factor of Unattached Multiple Superimposed Coalbed-Methane System Formation

SHEN Yu-lin^{1, 2
,},
QIN Yong^{1, 2},
GUO Ying-hai^{1, 2},
YI Tong-sheng³,
SHAO Yu-bao¹,
JIN Hong-bo¹

1.
School of Resources and Earth Science, China University of Mining and Technology, Xuzhou 221116, China
2.
Key Laboratory of CBM Resource and Reservoir-Generating Process of Ministry of Education, China University of Mining and Technology, Xuzhou 221008, China
3.
Guizhou Bureau of Coal Geology, Guiyang 550006, China

摘要

摘要: 基于黔西地区晚二叠世含煤地层的实测资料, 初步探讨了"多层叠置独立含煤层气系统"形成的沉积控制因素.研究表明, 含煤地层的沉积条件奠定了"多层叠置独立含煤层气系统"的物质及物性基础, 层序地层格架特点限定了含气单元间含气性的连通性.最大海泛面附近的菱铁质泥岩等低渗透岩层控制了垂向次级含气单元间的含气性相对独立, 且煤层含气量与海平面升降之间存在一定的相关性, 即最大海侵面附近煤层含气量相对较低, 此界面似乎可作为含煤层气系统内独立含气单元的成藏边界; 层序界面沟通了含气单元间的含气联系, 使得靠近层序界面附近的煤层具有相似的含气性特征.
- 煤层气 /
- 层序地层 /
- 低渗透岩层 /
- 最大海侵面 /
- 含气系统
Abstract: Based on the measured data of Late Permian coal-bearing strata in western Guizhou Province, the sedimentary controlling factor of "unattached multiple superimposed coalbed-methane system" formation is preliminarily discussed in this paper. It shows that the depositional conditions of coal-bearing strata have laid the material physical properties foundation for "unattached multiple superimposed coalbed-methane system". The characteristics of sequence stratigraphic framework limit gas connectivity between gas units. The siderite mudstone with low-permeability, which is distributed near the maximum flooding surface, makes the vertical sub-strata of gas between the gas-bearing units relatively independent. There is correlation between coalbed methane contents and the sea level. Coalbed methane contents near to the maximum flooding surface are relatively low. The interface can be regarded as a stand-alone boundary for gas-forming units in the coalbed-methane system. The sequence boundary connects the gas units, making the coal seams near to sequence boundary with the similar gas bearing characteristics.
- coalbed methane /
- sequence stratigraphy /
- low permeability rock /
- maximum flooding surfaces /
- coalbed methane bearing system

HTML全文

图 1 黔西地区晚二叠世沉积相及层序地层分析柱状图

Fig. 1. Sedimentary facies and sequence stratigraphy column of upper Permian in western Gouzhou Province

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图 2 黔西地区晚二叠世沉积体系展布

Fig. 2. Sedimentary system distribution of upper Permian in western Gouzhou Province

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图 3 层序格架内煤层含气性垂向非连续性特征

Fig. 3. Coalbed-methane vertical non-continuous in sequence stratigraphy framework

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图 4 海相沉积铁矿床铁矿物相分带示意(据姚凤良和郑明华，1983)

Fig. 4. Iron mineral phase zonation in marine sedimentary iron

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图 5 分划性隔水阻气层在层序格架内分布示意

Fig. 5. Distribution of partitional gas impermeable rock in sequence stratigraphy framework

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表 1 ZZ1001孔岩石孔隙度测试结果

Table 1. Porosity test results of well ZZ1001

样品编号	岩性	层位	埋深(m)	块体密度(g/cm³)	体积密度(g/cm³)	蜡封法孔隙度(%)	压汞孔隙度(%)
1	碳质泥岩	3煤底板	115.21~117.20	2.46	2.64	6.818 181 818	3.195 7
2	泥质粉砂岩	5煤顶板	125.21~121.91	2.60	2.80	7.142 857 143	3.779 8
3	石灰岩	K₃下	130.91~132.41	2.76	2.82	2.127 659 574	0.890 7
4	菱铁岩	6煤顶板	136.71~139.71	3.12	3.20	2.50	2.169 7
5	砂质泥岩	K₅					5.561 3
6	泥岩		157.21~159.81	2.69	2.81	4.270 462 633	5.906 8
7	泥岩		157.21~159.81	2.61	2.76	5.434 782 609	5.5390
8	泥岩	13煤顶板	208.21~210.81	2.57	2.70	4.814 814 815	3.013 5
9	泥岩	14煤顶板	212.21~214.11	2.99	3.10	3.548 387 097	2.996 9
10	泥岩	22煤顶板	281.21~282.91	2.24	2.43	7.818 930 041	5.730 5
11	泥岩	22煤顶板	282.91~284.21	2.5	2.70	7.407 407 407	5.910 1
12	石灰岩	K₇	290.27~293.01	2.68	2.77	3.249 097 473	1.095 5
13	粉砂岩	25煤顶板	299.01~	2.76	2.91	5.154 639 175	3.590 4
14	泥岩	26煤顶板	314.2~317.21	2.59	2.74	5.474 452 555	3.419 3
15	泥质粉砂岩	27煤顶板	320.21~323.21	2.61	2.84	8.098 591 549	3.485 9
16	细砂岩	30煤顶板	344.21~347.01	2.68	2.81	4.626 334 52	2.537 2
17	泥岩	30煤顶板	347.01~350.01	2.54	2.70	5.925 925 926	2.155 7
18	石灰岩	K₁₁	364.71~367.71	2.88	2.96	2.702 702 703	2.621 1
注：据杨兆彪，2011.

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