The Permeability Dynamic Variation Features of Coalswith the Consideration of Moisture Content

MA Fei-ying,WANG Yong-qing,WANG Lin，JIANG Rui,WANG Hui

doi:10.11764/j.issn.1672-1926.2014.09.1477

Natural Gas Geoscience >

2014 , Vol. 25 >Issue 9: 1477 - 1482

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.09.1477

The Permeability Dynamic Variation Features of Coalswith the Consideration of Moisture Content

Expand


(1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;2.Southwest Gas Production Plant,Zhejiang Oil Field Branch Company,CNPC,Yibin 645250,China;3.BGP INC,China National Petroleum Corporation,Zhuozhou 072751,China)

Received date: 2013-09-17

Revised date: 2013-12-15

Online published: 2014-09-10

Fold

Abstract

For the accuracy test of the permeability model considering moisture content to describe the permeability dynamic variation features and the recovery degree of permeability in the drainage process,the values of rebound pressure,recovery pressure of the three kinds of permeability models,and the permeability dynamic variation process were investigated by employing the permeability model considering moisture content,P-M model and S-D model.The results show that:(1) the values of rebound pressure and recovery pressure calculated by P-M model are the smallest,while those values calculated by S-D model and the permeability model considering moisture content are close|(2) the permeability rate predicted from these three models by considering moisture content matches well with the one obtained from site well testing,which indicates the predicted values of the permeability model considering moisture content are much closer to the real values|(3) when the recovery pressure is less than 0,the permeability which decreased in the mining process cannot be restored to the initial permeability.

Key words： Moisture content; Permeability model; Rebound pressure; Recovery pressure; Dynamic changes

Cite this article

MA Fei-ying,WANG Yong-qing,WANG Lin，JIANG Rui,WANG Hui . The Permeability Dynamic Variation Features of Coalswith the Consideration of Moisture Content[J]. Natural Gas Geoscience, 2014 , 25(9) : 1477 -1482 . DOI: 10.11764/j.issn.1672-1926.2014.09.1477

References

［1］Qian Kai,Shi Zhensheng,Lin Shiguo,et al.Industrization progression and development suggestions for coalbed methane of China[J].Natural Gas Geoscience,2009,20(6):831-840.［钱凯,施振生,林世国,等.中国煤层气的产业化进程与发展建议[J].天然气地球科学,2009,20(6):831-840.］
［2］Cui Yuchao,Teng Zijun,Wang Huaihong,et al.Distribution,development and utilization of CBM from Longchang coal mine in Qianxi county,Guizhou province[J].Natural Gas Geoscience,2011,22(2):367-372.［崔玉朝,腾子军,王怀洪,等.贵州黔西龙场煤矿煤层气资源及开发利用价值[J].天然气地球科学,2011,22(2):367-372.］
［3］Deng Ze,Kang Yongshang,Liu Honglin,et al.Dynamic variation character of coal bed methane reservoir permeability during depletion[J].Journal of China Coal Society,2009,34(7):947-951.［邓泽,康永尚,刘洪林,等.开发过程中煤储层渗透率动态变化特征[J].煤炭学报,2009,34(7):947-951.］
［4］Ai Chi,Li Shuang,Li Jingran,et al.Models of dynamic permeability variation of coal seam[J].Special Oil and Gas Reservoirs,2013,20(1):71-73.［艾池,栗爽,李净然,等.煤岩储层渗透率动态变化模型[J].特种油气藏,2013,20(1):71-73.］
［5］Guo Hui,Fang Xinliang,Wang Xueying,et al.Study on permeability rate variation features of mine coal bed methane reservoir during gas drainage process of coal bed methane well[J].Coal Science and Technology,2013,41(1):82-83,88.［郭徽,房新亮,王雪颖,等.煤层气井排采时储层渗透率变化特征研究[J].煤炭科学技术,2013,41(1):82-83,88.］
［6］Sawyer W K,Paul G W,Schraufnagle R A.Development and Application of a 3D Coalbed Simulator［R］.Annual Technical Meeting,June 10-13,Calgary,Alberta.Petroleum Society of Canada.PETSOC-90-119,1990.
［7］Seidle J R,Huitt L G.Experimental Measurement of Coal Matrix Shrinkage Due to Gas Desorption and Implications for Cleat Permeability Increases［R］.International Meeting on Petroleum Engineering,14-17 November,Beijing,China.SPE 30010,1995.
［8］Palmer I,Mansoori J.How permeability depends on stress and pore pressure in coalbeds:A new model[J].SPE Reservoir Evaluation and 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］Shi J Q,Durucan S.A model for changes in coalbed permeability during primary and enhanced methane recovery[J].SPE Reservoir Evaluation and Engineering,2005,8(4):291-299.
［11］Thararoop P,Karpyn Z T,Ertekin T.Development of a coal shrinkage-swelling model accounting for water content in the micropores[J].International Journal of Mining and Mineral Engineering,2009,1(4):346-364.
［12］Zhang Yapu,He Yingfu,Yang Zhengming,et al.Experimental research on stress sensitivity of coalbed reservoir[J].Natural Gas Geoscience,2010,21(3):518-521.［张亚蒲,何应付,杨正明,等.煤层气藏应力敏感性实验研究[J].天然气地球科学,2010,21(3):518-521.］
［13］Ma Qiang.The analysis of coal permeability changes based on Matchstick strain[J].Transactions of Beijing Institute of Technology,2011,31(4):387-390.［马强.基于Matchstick应变分析煤层渗透率变化[J].北京理工大学学报,2011,31(4):387-390.］
［14］Ma Feiying,Wang Yongqing,Wang Lin,et al.Influence of moisture content in coal rock on permeability[J].Lithologic Reservoirs,2013,25(3):97-101.［马飞英,王永清,王林,等.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.］
［15］Pekot L J,Reeves S R.Modeling the effects of matrix shrinkage and differential swelling on coalbed methane recovery and carbon sequestration［C］//Proceedings of the International Coalbed Methane Symposium,2003.
［16］Wang Zhiming,Wang Zhonghua,Zhang Jian.Applicability assessment of coal reservoir permeability dynamic prediction model[J].Coal Geology of China,2010,22(10):22-25.［旺志明,王忠华,张健.煤储层渗透率动态预测模型适用性评价[J].中国煤炭地质,2010,22(10):22-25.］

Options

Outlines

模态框（Modal）标题

Abstract

Cite this article

References