低渗致密气藏开发动态物理模拟实验相似准则
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摘要
低渗致密气藏地质条件复杂,普遍含有孔隙水,渗流规律不清,开发动态早期难以预测。根据低渗致密气藏地质与开发特征,筛选出影响气藏开发动态的主要影响因素,并依据π定理确定了气藏开发物理模拟实验相似准数,阐述了其物理意义;以鄂尔多斯盆地低渗气藏X井为例,根据相似性准则,开展了气藏开发物理模拟实验研究,并与X井生产动态进行对比。结果表明:应用所建相似准则进行气藏开发物理模拟可以较好地预测气藏开发动态,得出的相似准则合理;关键相似准数为动力相似、运动相似和含水饱和度相似。研究成果对于低渗致密气藏有效开发具有重要的理论指导意义。
Low permeability tight gas reservoirs are characterized by the complex geological condition,widespread pore water and unclear seepage law,so it is difficult to predict the development dynamics in the early stage. According to the geology and development characteristics of the low-permeability tight gas reservoir,the major influencing factors of the reservoir development performances were screened out,and moreover the similarity criterion numerals of the physical simulating experiment for the reservoir development were determined by π theorem and furthermore their significances were stated; taking Well X located in the low-permeability gas reservoir of Ordos Basin as an example,according to the similarity criterion,the experimental study of the physical simulation for the gasreservoir development was conducted,and moreover the contrast was engaged with the production performances of the well stated above. The results show that the gas-reservoir physical simulation with the help of the established similarity criterion can well predict the development performances of the gas reservoir and the rationality of the criterion has been proven as well; the key similarity criterion numerals are the drive similarity,motion similarity and water saturation similarity. The study results possess important guiding significances in the theory of the high-efficiency development of the low-permeability tight gas reservoir.
Low permeability tight gas reservoirs are characterized by the complex geological condition,widespread pore water and unclear seepage law,so it is difficult to predict the development dynamics in the early stage. According to the geology and development characteristics of the low-permeability tight gas reservoir,the major influencing factors of the reservoir development performances were screened out,and moreover the similarity criterion numerals of the physical simulating experiment for the reservoir development were determined by π theorem and furthermore their significances were stated; taking Well X located in the low-permeability gas reservoir of Ordos Basin as an example,according to the similarity criterion,the experimental study of the physical simulation for the gasreservoir development was conducted,and moreover the contrast was engaged with the production performances of the well stated above. The results show that the gas-reservoir physical simulation with the help of the established similarity criterion can well predict the development performances of the gas reservoir and the rationality of the criterion has been proven as well; the key similarity criterion numerals are the drive similarity,motion similarity and water saturation similarity. The study results possess important guiding significances in the theory of the high-efficiency development of the low-permeability tight gas reservoir.
引文
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[2]胡勇,李熙喆,李跃刚,等.低渗致密砂岩气藏提高采收率实验研究[J].天然气地球科学, 2015, 26(11):2142-2148.HU Yong,LI Xizhe,LI Yuegang,et al. Enhanced gas recovery of the low permeability and tight sandstone gas reservoir[J]. Natural Gas Geoscience,2015,26(11):2142-2148.
[3]胡勇,郭长敏,徐轩,等.砂岩气藏岩石孔喉结构及渗流特征[J].石油实验地质,2015,37(3):390-393.HU Yong,GUO Changmin,XU Xuan,et al. Pore throat structure and flow characteristics of sandstone reservoirs[J]. Petroleum Geology&Experiment,2015,37(3):390-393.
[4]胡勇,李熙喆,卢祥国,等.砂岩气藏衰竭开采过程中含水饱和度变化规律[J].石油勘探与开发,2014,41(6):723-726.HU Yong,LI Xizhe,LU Xiangguo,et al. Varying law of water saturation in the depletion-drive development of sandstone gas reservoirs[J]. Petroleum Exploration and Development, 2014, 41(6):723-726.
[5]胡勇,李熙喆,卢祥国,等.高含水致密砂岩气藏储层与水作用机理[J].天然气地球科学, 2014, 25(7):1072-1076.HU Yong,LI Xizhe,LU Xiangguo,et al. The realization of the active mechanism between formation and water in tight sand gas reservoir with high water saturation[J]. Natural Gas Geoscience,2014,25(7):1072-1076.
[6]胡勇,李熙喆,万玉金,等.致密砂岩气渗流特征物理模拟[J].石油勘探与开发,2013,40(5):580-584.HU Yong,LI Xizhe,WAN Yujin,et al. Physical simulation on gas percolation in tight sandstone[J]. Petroleum Exploration and Development,2013,40(5):580-584.
[7]朱华银,朱维耀,罗瑞兰.低渗透气藏开发机理研究进展[J].天然气工业,2010,30(11):44-47,118-119.ZHU Huayin,ZHU Weiyao,LUO Ruilan. Research progress in the development mechanism of low-permeability gas reservoirs[J].Natural Gas Industry,2010,30(11):44-47,118-119.
[8]朱华银,胡勇,朱维耀,等.气藏开发动态物理模拟技术[J].石油钻采工艺,2010,32(增刊1):54-57.ZHU Huayin,HU Yong,ZHU Weiyao,et al. Physical simulation technology for gas reservoir development behavior analysis[J]. Oil Drilling&Production Technology,2010,32(S1):54-57.
[9]朱华银,徐轩,安来志,等.致密气藏孔隙水赋存状态与流动性实验[J].石油学报,2016,37(2):230-236.ZHU Huayin,XU Xuan,AN Laizhi,et al. An experimental on occurrence and mobility of pore water in tight gas reservoirs[J].Acta Petrolei Sinica,2016,37(2):230-236.
[10]朱华银,徐轩,高岩,等.致密砂岩孔隙内水的赋存特征及其对气体渗流的影响:以松辽盆地长岭气田登娄库组气藏为例[J].天然气工业,2014,34(10):54-58.ZHU Huayin,XU Xuan,GAO Yan,et al. Occurrence characteristics of tight sandstone pore water and its influence on gas seepage:A case study from Denglouku gas reservoir in the Changling Gas Field,Southern Songliao Basin[J]. Natural Gas Industry,2014,34(10):54-58.
[11]朱华银,付大其,卓兴家,等.低渗气藏特殊渗流机理实验研究[J].天然气勘探与开发,2009,32(3):39-41,74.ZHU Huayin,FU Daqi,ZHUO Xingjia,et al. Experimental study on special percolation mechanism of low-permeability gas reservoir[J]. Natural Gas Exploration and Development,2009,32(3):39-41,74.
[12]刘华勋,任东,高树生,等.边、底水气藏水侵机理与开发对策[J].天然气工业,2015,35(2):47-53.LIU Huaxun,REN Dong,GAO Shusheng,et al. Water influx mechanism and development strategy of gas reservoirs with edge and bottom water[J]. Natural Gas Industry,2015,35(2):47-53.
[13]叶礼友,高树生,杨洪志,等.致密砂岩气藏产水机理与开发对策[J].天然气工业,2015,35(2):41-46.YE Liyou,GAO Shusheng,YANG Hongzhi,et al. Water production mechanism and development strategy of tight sandstone gas reservoir[J]. Natural Gas Industry,2015,35(2):41-46.
[14]高树生,叶礼友,熊伟,等.大型低渗致密含水气藏渗流机理及开发对策[J].石油天然气学报,2013,35(7):93-99.GAO Shusheng,YE Liyou,XIONG Wei,et al. Seepage mechanism and strategy for development of large and low permeability and tight sandstone gas reservoirs with water content[J]. Journal of Oil and Gas Technology,2013,35(7):93-99.
[15]李熙喆,万玉金,陆家亮,等.复杂气藏开发技术[M].北京:石油工业出版社,2010.LI Xizhe,WAN Yujin,LU Jialiang,et al. Complex gas reservoir development technology[M]. Beijing:Petroleum Industry Press,2010.