压裂致密油藏产能递减分析方法
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摘要
致密油储层自然渗透率低,孔隙结构细小、流体流动难度大,一般采用压裂井衰竭开发方式。压裂后储层将形成裂缝、基质两种渗流介质。在综合考虑介质类型及不同介质渗流能力基础上,结合物质平衡方程及产能方程,建立了压裂致密油储层的产量递减模型。实例分析表明,产量递减模型与生产动态数据吻合度较高;而常规Arps递减由于没有考虑基质与裂缝的差异性,递减曲线与生产动态数据吻合度相对较低。因此,该方法可以用于压裂致密油藏产能递减规律的分析。
Tight oil reservoirs have the characteristics of low natural permeability and micro pore structure resulting in the resistance in fluid percolation and the difficulty in waterflooding,and depletion drive development with fracturing are frequently adopted. The fractured tight oil reservoirs will form fracture and matrix two reservoir medium with two percolation systems respectively. Considering that the reservoir percolation characteristics completely differ from the single medium reservoir,based on the comprehensive consideration of the medium type and the percolation capacity of different medium,the production decline model of the fractured tight oil reservoirs was deduced theoretically through combining the material balance equation and the productivity equation. The case analysis shows that the method is in good agreement with the production dynamic data. Conventional Arps decline does not take into account the difference between matrix and fracture,and the consistency between decline curve and production dynamic data is relatively low. Therefore,this method can be used to analyze the productivity decline rule of fractured tight reservoirs.
Tight oil reservoirs have the characteristics of low natural permeability and micro pore structure resulting in the resistance in fluid percolation and the difficulty in waterflooding,and depletion drive development with fracturing are frequently adopted. The fractured tight oil reservoirs will form fracture and matrix two reservoir medium with two percolation systems respectively. Considering that the reservoir percolation characteristics completely differ from the single medium reservoir,based on the comprehensive consideration of the medium type and the percolation capacity of different medium,the production decline model of the fractured tight oil reservoirs was deduced theoretically through combining the material balance equation and the productivity equation. The case analysis shows that the method is in good agreement with the production dynamic data. Conventional Arps decline does not take into account the difference between matrix and fracture,and the consistency between decline curve and production dynamic data is relatively low. Therefore,this method can be used to analyze the productivity decline rule of fractured tight reservoirs.
引文
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10夏建华.现代油气井产能分析理论和方法研究[D].北京:中国地质大学(北京),2006Xia Jianhua.Art of modern productivity analysis for oil&gas wells[D].Beijing:China University of Geosciences(Beijing),2006
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14俞启泰.Arps递减指数n<0或n≥1怎么办[J].新疆石油地质,2000,21(5):408-411Yu Qitai.How to handle it when Arps n<0 or n≥1[J].Xinjiang Petrolieum Geology,2000,21(5):408-411
15谢军,李平,侯康柱.利用二元回归曲线拟合法和筛选法分析产能递减规律[J].石油工业计算机应用,2005,13(3):39-44Xie Jun,Li Ping,Hou Kangzhu.Analyzing the rule of productive capacity digressions by using fitting method of binary regression curves and screening method[J].Computer Applications of Petroleum,2005,13(3):39-44
16国艳.气井产能递减规律的研究[J].科学技术与工程,2011,33(11):8310-8313Guo Yan.The research status about gas well production and the law of diminishing[J].Science Technology and Engineering,2011,33(11):8310-8313
17熊健,马强,肖峰,等.基于渗流特征的低渗气藏压裂井产能递减规律研究[J].科学技术与工程,2013,13(6):1592-1597Xiong Jian,Ma Qiang,Xiao Feng,et al.Analysis on production decline law in fracturing well in the low-permeability gas reservoir with percolation characteristics[J].Science Technology and Engineering,2013,13(6):1592-1597
18白玉湖,徐兵祥,陈桂华,等.不确定性页岩油气产量递减预测方法[J].天然气勘探与开发,2016,39(3):45-49Bai Yuhu,Xu Bingxiang,Chen Guihua,et al.Uncertain production decline forecasting method of shale oil and gas[J].Natural Gas Exploration and Development,2016,39(3):45-49
19杨兆中,陈倩,李小刚.致密油藏水平井分段多簇压裂产能预测方法[J].特种油气藏,2017,24(4):73-77Yang Zhaozhong,Chen Qian,Li Xiaogang.A method to predict productivity of multi-stage multi-cluster fractured horizontal wells in tight oil reservoirs[J].Special Oil and Gas Reservoirs,2017,24(4):73-77
20项俊辉,殷代印,王东琪.基于复合相渗的特低渗透油藏递减率新模型[J].数学的实践与认识,2018,48(9):138-143Xiang Junhui,Yin Daiyin,Wang Dongqi.A new model of decline rate for ultra-low permeability reservoirs based on composite relative permeability[J].Mathematics in Practice and Theory,2018,48(9):138-143
21姜汉桥,姚军,姜瑞忠.油藏工程原理与方法[M].东营:中国石油大学出版社,2006Jiang Hanqiao,Yao Jun,Jiang Ruizhong.Principle and method of reservoir engineering[M].Dongying:China University of Petroleum Press,2006
22李剑辉,朱维耀,岳明,等.水平井压裂单缝和多分支缝中携砂液流动规律数值模拟[J].科学技术与工程,2018,18(22):38-46Li Jianhui,Zhu Weiyao,Yue Ming,et al.Numerical simulation of proppant-laden fluid flow in single fracture and branch fractures of horizontal well[J].Science Technology and Engineering,2018,18(22):38-46
23高承泰.具有补给区的物质平衡法及其对定容气藏的应用[J].石油勘探与开发,1993,20(5):53-61Gao Chengtai.The material balance equation with a supplying region and its use in gas reservoir[J].Petroleum Exploration and Development,1993,20(5):53-61
2孙赞东,贾承造,李相方,等.非常规油气勘探与开发[M].北京:石油工业出版社,2011Sun Zandong,Jia Chengzao,Li Xiangfang,et al.Unconvertional oil&gas exploration and development[M].Beijing:Petroleum Industry Press,2011
3贾承造,邹才能,李建忠,等.中国致密油评价标准、主要类型、基本特征及资源前景[J].石油学报,2012,33(3):343-350Jia Chengzao,Zou Caineng,Li Jianzhong,et al.Assessment criteia,main types,basic features and resource prospects of the tight oil in China[J].Acta Petrolei Sinica,2012,33(3):343-350
4梁涛,常毓文,郭晓飞,等.巴肯致密油藏单井产能参数影响程度排序[J].石油勘探与开发,2013,40(3):357-362Liang Tao,Chang Yuwen,Guo Xiaofei,et al.Influence factors of single well’s productivity in the Bakken tight oil reservoir[J].Petroleum Exploration and Development,2013,40(3):357-362
5林森虎,邹才能,袁选俊,等.美国致密油开发现状及启示[J].岩性油气藏,2011,23(4):25-30Lin Senhu,Zou Caineng,Yuan Xuanjun,et al.Status of tight oil exploitation in the United States and its implication[J].Lithologic Reservoirs,2011,23(4):25-30
6吴承美,郭智能,唐伏平,等.吉木萨尔凹陷二叠系芦草沟组致密油初期开采特征[J].新疆石油地质,2014,35(5):570-573Wu Chengmei,Guo Zhineng,Tang Fuping,et al.Early exploitation characteristics of Lucaogou tight oil of permian in Jimusaer Sag,Junggar Basin[J].Xinjiang Petroleum Geology,2014,35(5):570-573
7赖令彬.页岩气动态储量评价方法研究[D].北京:中国石油勘探开发研究院,2015Lai Lingbin.Esearch of evaluation method for the shale gas dynamic reserves[D].Beijing:China Petroleum Exploration and Development Research Institute,2015
8李道品.低渗透砂岩油田开发[M].北京:石油工业出版社,1997:125-170Li Daopin.The development of the low permeability sandstone oil field[M].Beijing:Petroleum Industry Press,1997:125-170
9胡素明.低渗气藏动态储量评价方法研究[D].北京:中国石油大学(北京),2012Hu Suming.Calculation methods research of dynamic reserves for the low permeability gas reserves[D].Beijing:China University of Petroleum(Beijing),2012
10夏建华.现代油气井产能分析理论和方法研究[D].北京:中国地质大学(北京),2006Xia Jianhua.Art of modern productivity analysis for oil&gas wells[D].Beijing:China University of Geosciences(Beijing),2006
11陈元千.双曲线递减的简化及确定可采储量的截距法[J].天然气工业,1994,14(4):32-36Chen Yuanqian.Simplification of hyperbolic decline and the intercept method of determining recoverable reserves[J].Natural Gas Industry,1994,14(4):32-36
12计秉玉.产量递减方程的渗流理论基础[J].石油学报,1995,16(3):86-91Ji Bingyu.The fundamentals of seepage flow theory used on the production decline equations[J].Acta Petrolei Sinica,1995,16(3):86-91
13俞启泰.一种新型递减曲线[J].石油勘探与开发,1999,26(3):72-75Yu Qitai.A new decline curve[J].Petroleum Exploration and Development,1999,26(3):72-75
14俞启泰.Arps递减指数n<0或n≥1怎么办[J].新疆石油地质,2000,21(5):408-411Yu Qitai.How to handle it when Arps n<0 or n≥1[J].Xinjiang Petrolieum Geology,2000,21(5):408-411
15谢军,李平,侯康柱.利用二元回归曲线拟合法和筛选法分析产能递减规律[J].石油工业计算机应用,2005,13(3):39-44Xie Jun,Li Ping,Hou Kangzhu.Analyzing the rule of productive capacity digressions by using fitting method of binary regression curves and screening method[J].Computer Applications of Petroleum,2005,13(3):39-44
16国艳.气井产能递减规律的研究[J].科学技术与工程,2011,33(11):8310-8313Guo Yan.The research status about gas well production and the law of diminishing[J].Science Technology and Engineering,2011,33(11):8310-8313
17熊健,马强,肖峰,等.基于渗流特征的低渗气藏压裂井产能递减规律研究[J].科学技术与工程,2013,13(6):1592-1597Xiong Jian,Ma Qiang,Xiao Feng,et al.Analysis on production decline law in fracturing well in the low-permeability gas reservoir with percolation characteristics[J].Science Technology and Engineering,2013,13(6):1592-1597
18白玉湖,徐兵祥,陈桂华,等.不确定性页岩油气产量递减预测方法[J].天然气勘探与开发,2016,39(3):45-49Bai Yuhu,Xu Bingxiang,Chen Guihua,et al.Uncertain production decline forecasting method of shale oil and gas[J].Natural Gas Exploration and Development,2016,39(3):45-49
19杨兆中,陈倩,李小刚.致密油藏水平井分段多簇压裂产能预测方法[J].特种油气藏,2017,24(4):73-77Yang Zhaozhong,Chen Qian,Li Xiaogang.A method to predict productivity of multi-stage multi-cluster fractured horizontal wells in tight oil reservoirs[J].Special Oil and Gas Reservoirs,2017,24(4):73-77
20项俊辉,殷代印,王东琪.基于复合相渗的特低渗透油藏递减率新模型[J].数学的实践与认识,2018,48(9):138-143Xiang Junhui,Yin Daiyin,Wang Dongqi.A new model of decline rate for ultra-low permeability reservoirs based on composite relative permeability[J].Mathematics in Practice and Theory,2018,48(9):138-143
21姜汉桥,姚军,姜瑞忠.油藏工程原理与方法[M].东营:中国石油大学出版社,2006Jiang Hanqiao,Yao Jun,Jiang Ruizhong.Principle and method of reservoir engineering[M].Dongying:China University of Petroleum Press,2006
22李剑辉,朱维耀,岳明,等.水平井压裂单缝和多分支缝中携砂液流动规律数值模拟[J].科学技术与工程,2018,18(22):38-46Li Jianhui,Zhu Weiyao,Yue Ming,et al.Numerical simulation of proppant-laden fluid flow in single fracture and branch fractures of horizontal well[J].Science Technology and Engineering,2018,18(22):38-46
23高承泰.具有补给区的物质平衡法及其对定容气藏的应用[J].石油勘探与开发,1993,20(5):53-61Gao Chengtai.The material balance equation with a supplying region and its use in gas reservoir[J].Petroleum Exploration and Development,1993,20(5):53-61