技术方法

煤岩中水分含量对渗透率的影响

  • 葛善良 ,
  • 王 英 ,
  • 曹 阳 ,
  • 于 雷
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  • 1.西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500; 2.中国石油浙江油田分公司西南采气厂,四川宜宾645250; 3.中国石化西南油气分公司广西采油厂,广西田东531599
马飞英(1985-),女,西南石油大学在读博士研究生,研究方向为油气田开发。 地址:(610500)四川省成都市新都区西南石油大学油气藏地质及开发工程国家重点实验室。 E-mail:xiaomahehe117@sina.com

网络出版日期: 2013-06-01

基金资助

国家重大科技专项“深煤层煤层气增产改造技术研究”(编号:2011ZX05042-002-001)资助

Influence of moisture content in coal rock on permeability

  • GE Shanliang ,
  • W ANG Ying ,
  • CAO Yang ,
  • YU Lei
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  • 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University,Chengdu 610500, China; 2. Southwest Gas Production Plant, PetroChina Zhejiang Oilfield Company,Yibin 645250, China;3. Guangxi Oil Production Plant, Southwest Oil and Gas Company, Sinopec, Tiandong 531599, China

Online published: 2013-06-01

摘要

为了探索煤岩中水分含量对渗透率的影响,对我国北方某煤层气区块 3 号和 15 号煤层的原煤煤样进行了实验。 结果表明:在相同条件下,干燥煤样、3%水分含量煤样及 6%水分含量煤样这 3 种煤样的渗透率均随孔隙压力的增大而先减小后增大,大致呈“抛物线”变化;干燥煤样的渗透率明显高于含水煤样的渗透率;随着水分含量的增加,煤样渗透率下降。 在实验和前人研究的基础上,利用不同水分含量煤样的实验数据进行了对比分析,并建立了考虑水分含量煤岩收缩/膨胀的渗透率模型,最后运用实例,将模型预测结果与现场试井渗透率数据进行了对比分析,其相对误差不大。 该研究成果对煤层气开采具有一定的指导意义。

本文引用格式

葛善良 , 王 英 , 曹 阳 , 于 雷 . 煤岩中水分含量对渗透率的影响[J]. 岩性油气藏, 2013 , 25(3) : 97 -101 . DOI: 10.3969/j.issn.1673-8926.2013.03.017

Abstract

In order to explore the influence of moisture content in coal rock on permeability, this paper made experiments on raw coal samples in a northern coal-bed methane blocks of No. 3 and No. 15 coal bed. The results show that: under the same conditions, the permeability of three kinds of coal rock of dried coal samples, 3% moisture content coal samples and 6% moisture content coal samples first decreases and then increases with the increase of pore pressure, roughly displays “parabola” change. The permeability of dried coal samples is significantly higher than that of moisture content coal samples. With the increase of moisture content, permeability of coal samples decreased. On the basis of experiments and previous studies, using comparative analysis method on experimental data of the coal samples with different moisture content, we modified the Langmuir isothermal equation and set up a permeability model considering the moisture content and coal rock contraction-expansion. Finally, contrastively analyzed the predicted results by model and site well testing permeability data of the application examples, and relative error is small, so this model has certain guiding significance for coal-bed methane mining.

参考文献

[1] 傅雪海,秦勇,韦重韬. 煤层气地质学[M].徐州:中国矿业大学出版社,2007:2-9.
[2] 李培超,孔祥言,曾清红等.煤层渗透率影响因素综述与分析[J].天然气工业,2002,22(5):45-49.
[3] 叶建平,史保生,张春才.中国煤储层渗透性及其主要影响因素[J].煤炭学报,1999,24(2):118-122.
[4] 傅雪海,秦勇,姜波等.山西沁水盆地中—南部煤储层渗透率物理模拟与数值模拟[J].地质科学,2003,38(2):221-229.
[5] 薄冬梅,赵永军,姜林.煤储层渗透率研究方法及主要影响因素[J].油气地质与采收率,2008,15(1):18-21.
[6] 张馨元,王晓东,张俊凡等.影响煤层气吸附性能因素探讨[J].中国石油和化工标准与质量,2011,85.
[7] Harpalani S,Zhao X. Changes in flow behavior of coal with ga desorption[R]. SPE 19450,1989.
[8] Palmer I,Mansoori J. How permeability depends on stress and pore pressure in coalbeds:A new model[J]. SPE Reservoir Evaluation & Engineering,1998,1(6):539-544.
[9] Shi J Q,Durucan S. Drawdown induced changes in permeability of coalbeds:A new interpretation of the reservoir response to primary recovery[J]. Transport in Porous Media,2004,56(1):1-16.
[10] Unsworth J F,Fowler C S,Heard N A. et al. Moisture in coal:1.Differentiation between forms of moisture by N.M.R. and microwave attenuation techniques[J]. Fuel,1988,67(8):1111-1119.
[11] Joubert J I,Grein C T and Bienstock D. Sorption of methane in moist coal[J]. Fuel,1973,52(3):181-185.
[12] Clarkson C R,Bustin R M. Binary gas adsorption/desorption isotherms:Effect of moisture and coal composition upon carbon dioxide selectivity over methane[J]. International Journal of Coal Geology,2000,42(4):241-271.
[13] Krooss B M,Bergen F, Gensterblum Y,et al. High-pressur methane and carbon dioxide adsorption on dry and moisture-equilibrated pennsylvania coals[J]. International Journal of Coal Geology,2002,51(2):69-92.
[14] Ozdemir E. Chemistry of the adsorption of carbon dioxide by argonne premium coals and a model to simulate CO2 sequestration in coal seams[D]. Pennsylvania:University of Pittsburgh,2004.
[15] Jahediesfanjani H,Civan F. Effect of resident water on enhanced coal gas recovery by simultaneous CO2 /N2 injection[R]. SPE 102634,2006.
[16] Thararoop P. Development of a multi-mechanistic,dual-porosity,dual-permeability numerical flow model for coal-bed methane reservoirs accounting for coal shrinkage and swelling effects [D].Pennsylvania:The Pennsylvania State University,2010.
[17] Reiss L H. The reservoir engineering aspects of fractured formations[M]. Paris:Gulf Publishing Company,1980.
[18] 刘飞.山西沁水盆地煤岩储层特征及高产富集区评价[D].成都:成都理工大学,2007:63-92.
[19] 中联煤层气有限责任公司.中国煤层气勘探开发技术研究[M].北京:石油工业出版社,2007:117-250.
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