煤层气井排采动态典型指标分析方法体系
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摘要
挖掘和揭示煤层气井排采动态资料背后蕴含的丰富的地质和工程信息,为井位部署和排采工作制度优化服务,是煤层气井排采动态分析的目的。以鄂尔多斯盆地某煤层气田35口井的实际排采动态资料为基础,提出从众多复杂排采动态曲线中挖掘初始见气时间、初始累计产水量、初始降液幅度、初始排水速度、典型日产水量、典型日产气量、典型米产水指数和典型米产气指数共8个排采动态典型指标,通过典型指标之间及其与地质因素和工程因素之间的关系分析,认为地解压差是影响初期排采动态的主要因素;在气水同产阶段,原始压力水头是影响产水量的主要因素,而煤层厚度、含气量和渗透率是影响产气量的主要因素;从排采动态曲线反映的排采效果看,研究区初始排水速度应控制在0.9 m/d。
The purpose of analysis on drainage and production dynamic curves of CBM well is to excavate and reveal the intrinsic abundant geological and engineering information for optimizing well deployment,and drainage and production. Based on the drainage and production data from 35 wells at a CBM field in Erdos Basin,authors proposed from the complex drainage and production dynamic curves to extract eight typical dynamic indexes including initial gas breakthrough time,initial cumulative water production,initial water level descending amplitude,initial water drainage speed,typical water production rate,typical gas production rate,typical water and gas production indexes. Through the analysis of relationships between these typical dynamic indexes,geological and engineering factors,it is found out that the main influencing factor during initial water drainage stage is the difference between the original formation pressure and the critical desorption pressure. At gas and water two phases producing stage,the original pressure head is the main factor influencing the typical water production rate,while the coal seam thickness,gas content and permeability are the main factors influencing the typical gas production rate. The study also demonstrates that it is suitable to control the initial water drainage speed at 0. 9 m/d in the study area in terms of the drainage effect demonstrated by the later production dynamic curves.
The purpose of analysis on drainage and production dynamic curves of CBM well is to excavate and reveal the intrinsic abundant geological and engineering information for optimizing well deployment,and drainage and production. Based on the drainage and production data from 35 wells at a CBM field in Erdos Basin,authors proposed from the complex drainage and production dynamic curves to extract eight typical dynamic indexes including initial gas breakthrough time,initial cumulative water production,initial water level descending amplitude,initial water drainage speed,typical water production rate,typical gas production rate,typical water and gas production indexes. Through the analysis of relationships between these typical dynamic indexes,geological and engineering factors,it is found out that the main influencing factor during initial water drainage stage is the difference between the original formation pressure and the critical desorption pressure. At gas and water two phases producing stage,the original pressure head is the main factor influencing the typical water production rate,while the coal seam thickness,gas content and permeability are the main factors influencing the typical gas production rate. The study also demonstrates that it is suitable to control the initial water drainage speed at 0. 9 m/d in the study area in terms of the drainage effect demonstrated by the later production dynamic curves.
引文
[1]赵庆波.煤层气地质与勘探开发技术[M].北京:石油工业出版社,1999:57-61.
[2]王红岩,刘洪林,赵庆波,等.煤层气富集成藏规律[M].北京:石油工业出版社,2005:5-7.
[3]刘洪林,李景明,宁宁,等.我国煤层气勘探开发现状、前景及产业化发展建议[J].天然气技术,2007,1(4):9-13.Liu Honglin,Li Jingming,Ning Ning,et al.Current status and prospect of china’s coal bed gas exploration and suggestions on accelerating its industrialized development[J].Natural Gas Technology,2007,1(4):9-13.
[4]翟光明,何文渊.煤层气是天然气的现实接替能源[J].天然气工业,2004,24(5):1-3.Zhai Guangming,He Wenyuan.Conventional natural gas’actual succeeding resources——coalbed methane[J].Natural Gas Industry,2004,24(5):1-3.
[5]接铭训,林建浩,胡爱梅.中国煤层气产业发展问题探讨及相关建议[J].中国煤层气,2007,4(1):4-6.Jie Mingxun,Lin Jianhao,Hu Aimei.Discussions on issues of developing china’s CBM industry and corresponding proposals[J].China Coalbed Methane,2007,4(1):4-6.
[6]高瑞祺,赵政璋.中国油气新区勘探[M].北京:石油工业出版社,2001:263-271.
[7]Palmer I D,Metcalfe R S,Yee D,等.煤层甲烷储层评价及生产技术[M].秦勇,曾勇,译.徐州:中国矿业大学出版社,1996.
[8]赵庆波,孙粉锦,李五忠.煤层气勘探开发地质理论与实践[M].北京:石油工业出版社,2011:5-71.
[9]唐书恒,朱卫平,李忠城,等.柳林区块煤层气井产出水特征及动态变化规律[A].叶建平,傅小康,李五忠.2011年煤层气学术研讨会论文集中国煤层气技术进展[C].北京:地质出版社,2011:336-342.
[10]翟雨阳,胡爱梅,王芝银,等.韩城地区煤层气井合理动液面高度控制方法探讨[A].叶建平,傅小康,李五忠.2011年煤层气学术研讨会论文集中国煤层气技术进展[C].北京:地质出版社,2011:359-363.
[11]吕玉民,汤达祯,许浩,等.煤层气藏开发初期单相水排采特征及其指示意义[A].叶建平,傅小康,李五忠.2011年煤层气学术研讨会论文集中国煤层气技术进展[C].北京:地质出版社,2011:376-382.
[12]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.Deng Ze,Kang Yongshang,Liu Honglin,et al.Dynamic variation character of coalbed methane reservoir permeability during depletion[J].Journal of China Coal Society,2009,34(7):947-951.
[13]张群,冯三利,杨锡禄.试论我国煤层气的基本储层特点及开发策略[J].煤炭学报,2001,26(3):230-235.Zhang Qun,Feng Sanli,Yang Xilu.Basic reservoir characteristics and development strategy of coalbed methane resource in China[J].Journal of China Coal Society,2001,26(3):230-235.
[14]周志成,王念喜,段春生.煤层水在煤层气勘探开发中的作用[J].天然气工业,1999,19(4):23-25.Zhou Zhicheng,Wang Nianxi,Duan Chunsheng.Action coalbed water in the exploration and development of coalbed gas[J].Natural Gas Industry,1999,19(4):23-25.
[15]高洪烈.论煤层气与地下水[J].中国煤田地质,1998,10(4):45-48.Gao Honglie.Discussion of coalbed methane and ground water[J].Coal Geology of China,1998,10(4):45-48.
[16]马凤山,李尚儒,蔡祖煌.煤层气开发的水文地质问题[J].水文地质工程地质,1998(3):20-22.Ma Fengshan,Li Shangru,Cai Zuhuang.Hydrogeological problems in coalbed gas exploitation[J].Hydrogeology and Engineering Geology,1998(3):20-22.
[17]陈润,秦勇,杨兆彪,等.煤层气吸附及其地质意义[J].煤炭科学技术,2009,37(8):103-107.Chen Run,Qin Yong,Yang Zhaobiao,et al.Adsorption of coal bed methane and its geological significance[J].Coal Science and Technology,2009,37(8):103-107.
[18]牛雪.煤层气吸附解吸性能评价及渗流实验研究[D].北京:中国石油大学(北京),2010.
[19]李小彦,司胜利.我国煤储层煤层气解吸特征[J].煤田地质与勘探,2004,32(3):27-29.Li Xiaoyan,Si Shengli.Coalbed gas desorption characteristics of coal reservoir in China[J].Coal Geology&Exploration,2004,32(3):27-29.
[20]倪小明,王延斌,接铭训,等.煤层气井排采初期合理排采强度的确定方法[J].西南石油大学学报,2007,29(6):101-104.Ni Xiaoming,Wang Yanbin,Jie Mingxun,et al.Reasonable production intensity of coal-bed methane wells in initial production[J].Journal of Southwest Petroleum Unversity,2007,29(6):101-104.
①韩军,康永尚,等.韩城煤层气田区域水动力场及其对煤层气富集和开发动态控制作用研究(国家科技重大专项项目38内部报告),2011。
[2]王红岩,刘洪林,赵庆波,等.煤层气富集成藏规律[M].北京:石油工业出版社,2005:5-7.
[3]刘洪林,李景明,宁宁,等.我国煤层气勘探开发现状、前景及产业化发展建议[J].天然气技术,2007,1(4):9-13.Liu Honglin,Li Jingming,Ning Ning,et al.Current status and prospect of china’s coal bed gas exploration and suggestions on accelerating its industrialized development[J].Natural Gas Technology,2007,1(4):9-13.
[4]翟光明,何文渊.煤层气是天然气的现实接替能源[J].天然气工业,2004,24(5):1-3.Zhai Guangming,He Wenyuan.Conventional natural gas’actual succeeding resources——coalbed methane[J].Natural Gas Industry,2004,24(5):1-3.
[5]接铭训,林建浩,胡爱梅.中国煤层气产业发展问题探讨及相关建议[J].中国煤层气,2007,4(1):4-6.Jie Mingxun,Lin Jianhao,Hu Aimei.Discussions on issues of developing china’s CBM industry and corresponding proposals[J].China Coalbed Methane,2007,4(1):4-6.
[6]高瑞祺,赵政璋.中国油气新区勘探[M].北京:石油工业出版社,2001:263-271.
[7]Palmer I D,Metcalfe R S,Yee D,等.煤层甲烷储层评价及生产技术[M].秦勇,曾勇,译.徐州:中国矿业大学出版社,1996.
[8]赵庆波,孙粉锦,李五忠.煤层气勘探开发地质理论与实践[M].北京:石油工业出版社,2011:5-71.
[9]唐书恒,朱卫平,李忠城,等.柳林区块煤层气井产出水特征及动态变化规律[A].叶建平,傅小康,李五忠.2011年煤层气学术研讨会论文集中国煤层气技术进展[C].北京:地质出版社,2011:336-342.
[10]翟雨阳,胡爱梅,王芝银,等.韩城地区煤层气井合理动液面高度控制方法探讨[A].叶建平,傅小康,李五忠.2011年煤层气学术研讨会论文集中国煤层气技术进展[C].北京:地质出版社,2011:359-363.
[11]吕玉民,汤达祯,许浩,等.煤层气藏开发初期单相水排采特征及其指示意义[A].叶建平,傅小康,李五忠.2011年煤层气学术研讨会论文集中国煤层气技术进展[C].北京:地质出版社,2011:376-382.
[12]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.Deng Ze,Kang Yongshang,Liu Honglin,et al.Dynamic variation character of coalbed methane reservoir permeability during depletion[J].Journal of China Coal Society,2009,34(7):947-951.
[13]张群,冯三利,杨锡禄.试论我国煤层气的基本储层特点及开发策略[J].煤炭学报,2001,26(3):230-235.Zhang Qun,Feng Sanli,Yang Xilu.Basic reservoir characteristics and development strategy of coalbed methane resource in China[J].Journal of China Coal Society,2001,26(3):230-235.
[14]周志成,王念喜,段春生.煤层水在煤层气勘探开发中的作用[J].天然气工业,1999,19(4):23-25.Zhou Zhicheng,Wang Nianxi,Duan Chunsheng.Action coalbed water in the exploration and development of coalbed gas[J].Natural Gas Industry,1999,19(4):23-25.
[15]高洪烈.论煤层气与地下水[J].中国煤田地质,1998,10(4):45-48.Gao Honglie.Discussion of coalbed methane and ground water[J].Coal Geology of China,1998,10(4):45-48.
[16]马凤山,李尚儒,蔡祖煌.煤层气开发的水文地质问题[J].水文地质工程地质,1998(3):20-22.Ma Fengshan,Li Shangru,Cai Zuhuang.Hydrogeological problems in coalbed gas exploitation[J].Hydrogeology and Engineering Geology,1998(3):20-22.
[17]陈润,秦勇,杨兆彪,等.煤层气吸附及其地质意义[J].煤炭科学技术,2009,37(8):103-107.Chen Run,Qin Yong,Yang Zhaobiao,et al.Adsorption of coal bed methane and its geological significance[J].Coal Science and Technology,2009,37(8):103-107.
[18]牛雪.煤层气吸附解吸性能评价及渗流实验研究[D].北京:中国石油大学(北京),2010.
[19]李小彦,司胜利.我国煤储层煤层气解吸特征[J].煤田地质与勘探,2004,32(3):27-29.Li Xiaoyan,Si Shengli.Coalbed gas desorption characteristics of coal reservoir in China[J].Coal Geology&Exploration,2004,32(3):27-29.
[20]倪小明,王延斌,接铭训,等.煤层气井排采初期合理排采强度的确定方法[J].西南石油大学学报,2007,29(6):101-104.Ni Xiaoming,Wang Yanbin,Jie Mingxun,et al.Reasonable production intensity of coal-bed methane wells in initial production[J].Journal of Southwest Petroleum Unversity,2007,29(6):101-104.
①韩军,康永尚,等.韩城煤层气田区域水动力场及其对煤层气富集和开发动态控制作用研究(国家科技重大专项项目38内部报告),2011。