潘庄区块煤层气井层间干扰数值模拟研究
|
摘要
以沁水盆地南部潘庄区块W01井为研究对象,运用Comet3数值模拟软件拟合了3#、15#煤层的实际排采数据,反演了煤储层的渗透率、含气量等煤储层参数,引入干扰系数的概念,采用控制单一变量的方法,讨论了储层参数对层间干扰系数的敏感性,并通过模拟单采、合采条件下煤层气产量及储层压力的变化,探讨了煤层气井排采过程中层间干扰的形成机制。研究表明:合层排采时,层间干扰程度随着煤层气井开发呈现先减小后增大再减小的特点;渗透率、孔隙度、朗氏体积是层间干扰的主要影响因素,原始储层压力的影响较小。
Based on No. W01 well in Panzhuang Block of Qinshui Basin as a study object,a Comet3 numerical simulation software was applied to fit the actual drainage data of No. 3 and No. 5 seams and inverse the penetration rate,gas content and other parameters of the coal seam. With the introduction of the interference coefficient conception,a single variation control method was applied to discuss the coal seam parameters affected to the sensitivity of the interference coefficients between seams. With the simulation on the variations of the coal bed methane production and the seam pressure under the signal seam mining and the combined mining,the paper discussed the formation mechanism of the interferences between the seams during the coal drainage process of the coal bed methane well. The study showed that during the multi seam combined drainage, the interference degree would be firstly decreased, then increased and late decreased with the development of the coal bed methane well. The penetration rate,porosity and Langmuir volume were the main influence factors of the interferences between the seams. The in- situ reservoir pressure would have less influence to the interferences.
Based on No. W01 well in Panzhuang Block of Qinshui Basin as a study object,a Comet3 numerical simulation software was applied to fit the actual drainage data of No. 3 and No. 5 seams and inverse the penetration rate,gas content and other parameters of the coal seam. With the introduction of the interference coefficient conception,a single variation control method was applied to discuss the coal seam parameters affected to the sensitivity of the interference coefficients between seams. With the simulation on the variations of the coal bed methane production and the seam pressure under the signal seam mining and the combined mining,the paper discussed the formation mechanism of the interferences between the seams during the coal drainage process of the coal bed methane well. The study showed that during the multi seam combined drainage, the interference degree would be firstly decreased, then increased and late decreased with the development of the coal bed methane well. The penetration rate,porosity and Langmuir volume were the main influence factors of the interferences between the seams. The in- situ reservoir pressure would have less influence to the interferences.
引文
[1]倪小明,苏现波,李广生.樊庄地区3#和15#煤层合层排采的可行性研究[J].天然气地球科学,2010,21(1):144-149.
[2]张先敏,同登科.沁水盆地产层组合对煤层气井产能的产能[J].煤炭学报,2007,32(3):272-275.
[3]谢学恒,刘小龙,陈贞龙,等.延川南地区2号和10号煤层分压合采的可行性研究[J].油气藏评价与开发,2011,1(3):65-69.
[4]李国彪,李国富.煤层气井单层与合层排采异同点及主控因素[J].煤炭学报,2012,37(8):1354-1358.
[5]倪小明,陈鹏,朱明阳.煤层气垂直井产能主控地质因素分析[J].煤炭科学技术,2010,38(7):109-113.
[6]桑浩田,桑树勋,周效志,等.沁水盆地南部煤层气井生产历史拟合与井网优化研究[J].山东科技大学学报(自然科学版),2011,30(4):58-65.
[7]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.
[8]鲜波,熊钰,石国新,等.薄层油藏合采层间干扰分析与技术对策研究[J].特种油气藏,2007,14(3):51-54.
[9]熊燕莉,冯曦,杨雅和,等.多层合采气井动态特征及开发效果分析[J].天然气勘探与开发,2005,28(1):21-24.
[10]胡勇,李熙喆,万玉金,等.高低压双层合采产气特征[J].天然气工业,2009,29(2):89-91.
[11]吴晓东,师俊峰,席长丰.煤层渗透率敏感性及其对煤层气开发效果的影响[J].天然气工业,2008,28(7):27-29.
[12]陈振宏,陈艳鹏,杨焦生,等.高煤阶煤层气储层动态渗透率特征及其对煤层气产量的影响[J].石油学报,2010,31(6):965-974.
[13]汪吉林,秦勇,等.多因素叠加作用下煤储层渗透率的动态变化规律[J].煤炭学报,2012,37(8):1348-1353.
[2]张先敏,同登科.沁水盆地产层组合对煤层气井产能的产能[J].煤炭学报,2007,32(3):272-275.
[3]谢学恒,刘小龙,陈贞龙,等.延川南地区2号和10号煤层分压合采的可行性研究[J].油气藏评价与开发,2011,1(3):65-69.
[4]李国彪,李国富.煤层气井单层与合层排采异同点及主控因素[J].煤炭学报,2012,37(8):1354-1358.
[5]倪小明,陈鹏,朱明阳.煤层气垂直井产能主控地质因素分析[J].煤炭科学技术,2010,38(7):109-113.
[6]桑浩田,桑树勋,周效志,等.沁水盆地南部煤层气井生产历史拟合与井网优化研究[J].山东科技大学学报(自然科学版),2011,30(4):58-65.
[7]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.
[8]鲜波,熊钰,石国新,等.薄层油藏合采层间干扰分析与技术对策研究[J].特种油气藏,2007,14(3):51-54.
[9]熊燕莉,冯曦,杨雅和,等.多层合采气井动态特征及开发效果分析[J].天然气勘探与开发,2005,28(1):21-24.
[10]胡勇,李熙喆,万玉金,等.高低压双层合采产气特征[J].天然气工业,2009,29(2):89-91.
[11]吴晓东,师俊峰,席长丰.煤层渗透率敏感性及其对煤层气开发效果的影响[J].天然气工业,2008,28(7):27-29.
[12]陈振宏,陈艳鹏,杨焦生,等.高煤阶煤层气储层动态渗透率特征及其对煤层气产量的影响[J].石油学报,2010,31(6):965-974.
[13]汪吉林,秦勇,等.多因素叠加作用下煤储层渗透率的动态变化规律[J].煤炭学报,2012,37(8):1348-1353.