考虑多因素影响的储气库气井注采能力优化
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摘要
气井注采能力是储气库设计的一个关键参数,影响因素较多、确定难度大,针对这一问题,研究建立了采出过程"气藏—井筒—地面"一体化采出模型,考虑气藏储层供给能力和水锥影响、井筒冲蚀和临界携液、地面最小出口压力制约、管线摩阻损失,综合确定直井和水平井采出能力;注入过程建立"地面—井筒—气藏"一体化注入模型,考虑地面压缩机出口压力制约、管线摩阻损失、井筒冲蚀、气藏储层密封上限压力,综合确定直井和水平井注入能力。结果表明,该研究成果现场应用于A储气库,确定了水平井合理注采能力,为储气库气井合理配产配注奠定了基础。
The injection-production capacities of gas wells are a key parameter in the design of the gas storage, which influencing factors are rather more and they are difficult to determine. In the light of this problem, an integrated producing model of "gas reservoir-wellbore-surface" was studied and established in the production process. Considering the reservoir supplying capacity and water-coning influence, the wellbore erosion and critical liquid-carrying rate and furthermore the surface minimal outlet pressure and the frictional loss of the pipelines, the production capacities of the vertical and horizontal wells were determined synthetically; the integrated injecting model of "surface-wellbore-gas reservoir" was established in the injection process. Considering the pressure restriction of the surface compressor outlet, the pipeline friction loss, the wellbore erosion and the upper limit pressure of the reservoir sealing, the injection capacities of the vertical and horizontal wells were determined comprehensively. The results were applied on the spot in Gas Storage A and the reasonable injection-production capacities of the horizontal wells were determined, thus the foundation was laid for the rational production and injection allocations of the gas wells in the gas storage.
The injection-production capacities of gas wells are a key parameter in the design of the gas storage, which influencing factors are rather more and they are difficult to determine. In the light of this problem, an integrated producing model of "gas reservoir-wellbore-surface" was studied and established in the production process. Considering the reservoir supplying capacity and water-coning influence, the wellbore erosion and critical liquid-carrying rate and furthermore the surface minimal outlet pressure and the frictional loss of the pipelines, the production capacities of the vertical and horizontal wells were determined synthetically; the integrated injecting model of "surface-wellbore-gas reservoir" was established in the injection process. Considering the pressure restriction of the surface compressor outlet, the pipeline friction loss, the wellbore erosion and the upper limit pressure of the reservoir sealing, the injection capacities of the vertical and horizontal wells were determined comprehensively. The results were applied on the spot in Gas Storage A and the reasonable injection-production capacities of the horizontal wells were determined, thus the foundation was laid for the rational production and injection allocations of the gas wells in the gas storage.
引文
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[13]舒萍,高涛,朱思南.火山岩气藏改建地下储气库注采能力[J].大庆石油地质与开发,2015,34(6):48-53.SHU Ping,GAO Tao,ZHU Sinan.Injection and production capacities for the volcanic gas reservoir converted into underground gas storage[J].Petroleum Geology & Oilfield Development in Daqing,2015,34(6):48-53.
[2]闫林,周雪峰,高涛,等.徐深气田兴城开发区火山岩储层发育控制因素分析[J].大庆石油地质与开发,2007,26(2):9-13.YAN Lin,ZHOU Xuefeng,GAO Tao,et al.Study on control factors for forming volcanic reservoir in Xingcheng Development Area of Xushen Gas Field[J].Petroleum Geology & Oilfield Development in Daqing,2007,26(2):9-13.
[3]孔垂显,邱子刚,秦军,等.准噶尔盆地西北缘石炭系火山岩储层特征研究[J].特种油气藏,2017,24(6):28-32.KONG Chuixian,QIU Zigang,QIN Jun,et al.Study on the characteristics of Carboniferous volcanic reservoir along the northwestern margin of Junggar Basin[J].Special Oil & Gas Reservoirs,2017,24(6):28-32.
[4]于士泉.大庆深层气藏复杂结构井开发实践与认识[J].大庆石油地质与开发,2018,37(3):49-53.YU Shiquan.Development practice and understandings of the complex structure wells in Daqing deep gas reservoir[J].Petroleum Geology & Oilfield Development in Daqing,2018,37(3):49-53.
[5]王建国,耿师江,庞彦明,等.火山岩岩性测井识别方法以及对储层物性的控制作用[J].大庆石油地质与开发,2008,27(2):136-139.WANG Jianguo,GENG Shijiang,PANG Yanming,et al.Volcanite lithology log identification method and the control of volcanite to reservoir property[J].Petroleum Geology & Oilfield Development in Daqing,2008,27(2):136-139.
[6]周立宏,李洪香,杨朋,等.沧东中生界火山岩特征与油气成藏模式[J].特种油气藏,2017,24(3):9-14.ZHOU Lihong,LI Hongxiang,YANG Peng,et al.Geologic characteristics and hydrocarbon accumulation model of Mesozoic volcanic rocks in Cangdong Area[J].Special Oil & Gas Reservoirs,2017,24(3):9-14.
[7]舒萍,纪学雁,丁日新,等.徐深气田火山岩储层的裂缝特征研究[J].大庆石油地质与开发,2008,27(1):13-17.SHU Ping,JI Xueyan,DING Rixin,et al.Study on fracture features of volcanic reservoirs in Xushen Gas Field[J].Petroleum Geology & Oilfield Development in Daqing,2008,27(1):13-17.
[8]高涛,王高文,石硕坤.徐深气田D区块气井积液诊断及水体规模[J].大庆石油地质与开发,2017,36(6):48-53.GAO Tao,WANG Gaowen,SHI Shuokun.Liquid loading diagnosis and aquifer size of the gas well in Block D of Xushen Gas Field[J].Petroleum Geology & Oilfield Development in Daqing,2017,36(6):48-53.
[9]Huret W.Water influx into a reservoir and its application to the equation of volumetric balance[R].SPE 943057,1943.
[10]TUMER R G.Analysis and prediction of minimum flow rate for the continuous removal liquids from gas wells[J].JPT,1969,21(11):1475-1482.
[11]VAN-EVERDINGEN A F,Hurst W.The application of the Laplace transformation to flow problems in reservoirs[R].SPE 949305,1949.
[12]刘双全,吴晓东,吴革生,等.气井井筒携液临界流速和流量的动态分布研究[J].天然气工业,2007,27(2):104-106.LIU Shuangquan,WU Xiaodong,WU Gesheng,et al.A study on dynamic distribution of the liquid-carrying critical velocities and flow rates along the wellbore of gas wells[J].Natural Gas Industry,2007,27(2):104-106.
[13]舒萍,高涛,朱思南.火山岩气藏改建地下储气库注采能力[J].大庆石油地质与开发,2015,34(6):48-53.SHU Ping,GAO Tao,ZHU Sinan.Injection and production capacities for the volcanic gas reservoir converted into underground gas storage[J].Petroleum Geology & Oilfield Development in Daqing,2015,34(6):48-53.