功率超声影响的煤中甲烷气促解规律实验研究
EXPERIMENTAL STUDY OF PROMOTING METHANE DESORPTION LAW IN COAL CONSIDERING POWER ULTRASOUND EFFECT
查看参考文献15篇
|
文摘
|
功率超声激励促解煤层甲烷气是一种不受储层地质条件和气源特性限制,具有普遍应用价值的增采技术。通过CT观测实验,对超声波作用下煤样不同尺度裂隙发展规律进行深入分析,从微观上揭示功率超声促解机制。在对比促解实验测定结果的基础上,研究功率超声作用煤样解吸量变化规律。研究结果表明:CT观测实验很好地证明了超声的机械震碎作用;在功率超声激励作用下,煤样裂隙条数显著增多,贯通裂隙增多且单条裂纹最大宽度显著增大;超声波作用后煤中甲烷气的解吸量有显著提高,建立超声声强参数影响的煤中甲烷气解吸量随解吸时间变化的修正公式。由修正公式拟合结果可知:煤中甲烷气饱和吸附后的解吸量α和α_1均随孔隙压力的增加而增大,相同孔隙压力下的甲烷气饱和吸附解吸量α_1大于无超声作用时的解吸量α,其原因在于在功率超声的声场强度影响下,煤质点的动能和位能增加,煤表面甚至基质内部吸附的甲烷更容易脱附变成游离态,从而达到煤层甲烷气促解作用。 |
|
其他语种文摘
|
Power ultrasonic incentive promoting desorption of methane in coal seam is a kind of general applicable value technology,which is out of limit controlled by reservoir geologic conditions and source gas characteristics. Through CT observation and promoting desorption experiment,the rule of coal samples different scales fracture development is analyzed considering ultrasonic effect,from microscopy to reveal the power ultrasonic promoting desorption mechanism. In contrast to the experimental determination of promoting desorption results,the rule of gas desorption quantity in coal sample changing with time by power ultrasonic action is studied. Research results show that:CT observation is the good proof that the ultrasonic mechanical shatter role. In the power ultrasonic incentive effect,the number of coal sample fracture significantly increased;transfixion crack increased and a single crack maximum width increased significantly;methane desorption quantity of coal has increased dramatically by ultrasonic incentive;the modifier formula of ultrasound promoting methane desorption quantity changing with time in the coal is established. The fitting correction formula show that:gas desorption quantity α and α_1 increased with increasing pore pressure after saturated adsorption;the methane saturated adsorption desorption quantity α_1 is greater than the desorption quantity α without ultrasonic incentive in same pore pressure;the reason is that in the influence of power ultrasonic field strength,coal point of kinetic energy and potential energy increase,the coal surface even matrix internal adsorption of methane easier to stripping into determination of free,so as to achieve coal seam methane promoting desorption effect. |
|
来源
|
岩石力学与工程学报
,2013,32(1):65-71 【核心库】
|
|
关键词
|
气田开发与开采
;
超声激励
;
尺度效应
;
CT
;
促解
|
|
地址
|
1.
辽宁工程技术大学力学与工程学院, 辽宁, 阜新, 123000
2.
中国科学院力学研究所, 北京, 100190
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1000-6915 |
|
学科
|
石油、天然气工业 |
|
基金
|
国家973计划
;
国家自然科学基金青年科学基金
;
2011年辽宁省教育厅科学研究一般项目
|
|
文献收藏号
|
CSCD:4892235
|
参考文献 共
15
共1页
|
|
1.
姜永东. 声场促进煤中甲烷解吸的机理研究.
煤炭学报,2010,35(10):1649-1653
|
被引
12
次
|
|
|
|
|
2.
王松.
含瓦斯煤体振动增透技术试验研究[硕士学位论文],2010
|
被引
1
次
|
|
|
|
|
3.
姜永东. 声震法促进煤中甲烷气解吸规律的实验及机理.
煤炭学报,2008,33(6):675-680
|
被引
24
次
|
|
|
|
|
4.
潘一山. 煤层中气水两相运移的NMRI试验研究.
地球物理学报,2008,51(5):1620-1626
|
被引
11
次
|
|
|
|
|
5.
Withjack E M.
Computed tomography for rock property determination and fluid-flow visualization. SPE 16951,1988
|
被引
1
次
|
|
|
|
|
6.
Bernard T.
Imaging of sand production in a horizontal sand pack by X-ray computed tomography. SPE 30248,1996
|
被引
1
次
|
|
|
|
|
7.
Kawakata H. The observations of faulting in Westerly granite under triaxial compression by X-ray CT scan.
International Journal of Rock Mechanics and Mining Sciences,1997,34(3/4):151-162
|
被引
17
次
|
|
|
|
|
8.
Goodwin A K. The use of X-ray computer tomography to investigate particulate interactions within opencast coal mine backfills.
Engineering Geology,2003,70(2):331-341
|
被引
6
次
|
|
|
|
|
9.
Sun W. Application of X-CT scanned image technique in the research of micro-pore texture and percolation mechanism in ultra-permeable oil field.
Acta Geologica Sinica,2006,80(5):775-778
|
被引
2
次
|
|
|
|
|
10.
Nguyen Q P.
Determination of gas trapping with foam using X-flay computed tomography and effluent analysis. SPE94764,2008
|
被引
1
次
|
|
|
|
|
11.
仵彦卿. 单轴条件下砂岩三维破裂过程的CT观测.
工程地质学报,2002,10(1):93-97
|
被引
7
次
|
|
|
|
|
12.
丁卫华. CT技术应用于岩石实验动态观测的新进展.
冰川冻土,2000,9(3):218-222
|
被引
11
次
|
|
|
|
|
13.
杨更社. 岩石细观损伤力学特性及本构关系的CT识别.
煤炭学报,2000,25(12):102-106
|
被引
5
次
|
|
|
|
|
14.
杨更社. 三轴受力状态下岩石损伤扩展力学特性研究.
西安科技学院学报,2000,20(6):101-104
|
被引
1
次
|
|
|
|
|
15.
任建喜. 岩石破坏全过程的CT细观损伤演化机理动态分析.
西安公路交通大学学报,2000,20(4):12-15
|
被引
8
次
|
|
|
|
|
了解气象卫星更多信息，请访问