The gas storages converted from deep carbonate gas reservoirs are characterized by large high and low pressure variations, stress sensitivity, and strong heterogereity. Using conventional methods to calculate its injection-production capacity will lead to large errors in production capacity. In response to the above problems, stress sensitivity is considered. The binomial productivity equation was revised in view of the influence of stress sensitivity and gas physical property changes, and on this basis, a calculation method of injection-production capacity suitable for the gas storage converted from deep carbonate gas reservoirs was established. Example calculations are carried out in conjunction with the Shapingchang Carboniferous Gas Reservoir in the Sichuan Basin, the influencing factors are analyzed, and the results show that: for type Ⅰ and Ⅱ pore-fracture collocation model reservoirs, the reasonable gas production rate of gas wells is controlled by outflow dynamics under low pressure and limited by erosion flow under high pressure, while the reasonable gas injection rate is controlled by outflow dynamics under high pressure and limited by erosion flow under low pressure; for type Ⅲ pore-fracture collocation model reservoirs, the reasonable gas injection and production rates of gas wells are mainly controlled by the outflow dynamics. The influence of stress sensitivity on the maximum gas injection rate of the gas well is 0.81%~9.69%, and the influence of the change of gas physical parameters is 5.15%~35.29%; under the existing wellbore structure conditions, when the gas injection rate is 55×104 to 70×104 m3/d, the frictional pressure loss can reaches to 10 MPa; when the inner diameter of the tubing increases from 62.0 mm to 112.0 mm, the maximum gas injection volume increases to 2.6 times. The research results can provide technical support for the calculation of the injection-production capacity of deep carbonate gas storages, and have guiding significance for the construction and operation of such gas storages.
[1] 何伶,赵伦,李建新,等.碳酸盐岩储集层复杂孔渗关系及影响因素——以滨里海盆地台地相为例[J].石油勘探与开发,2014,41(2):206-214.
HE Ling,ZHAO Lun,LI Jianxin,et al.Complex relationship between porosity and permeability of carbonate reservoirs and its controlling factors:a case of platform facies in Pre-Caspian Basin[J].Petroleum Exploration and Development,2014,41(2):206-214.
[2] 冯曦,彭先,李隆新,等.碳酸盐岩气藏储层非均质性对水侵差异化的影响[J].天然气工业,2018,38(6):67-73.
FENG Xi,PENG Xian,LI Longxin,et al.Influence of reservoir heterogeneity on water invasion differentiation in carbonate gas reservoirs[J].Natural Gas Industry,2018,38(6):67-73.
[3] 王海燕.考虑多因素影响的储气库气井注采能力优化[J].大庆石油地质与开发,2019,38(3):54-58.
WANG Haiyan.Optimization of the injection-production capacity of the gas storage well considering the influences of the multiple factors[J].Petroleum Geology & Oilfield Development in Daqing,2019,38(3):54-58.
[4] 陈显学,温海波.辽河油田双6储气库单井采气能力评价[J].新疆石油地质,2017,38(6):715-718.
CHEN Xianxue,WEN Haibo.Evaluation of single gas well production capacity of Shuang-6 gas storage in Liaohe Oilfield[J].Xinjiang Petroleum Geology,2017,38(6):715-718.
[5] 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.
[6] 胥洪成,董宏,吕建,等.水侵枯竭气藏型储气库运行初期合理配注方法[J].天然气工业,2017,37(2):92-95.
XU Hongcheng,DONG Hong,LYU Jian,et al.An approach to rational injection allocation of UGS rebuilt from watered-out depleted gas reservoirs during initial operation[J].Natural Gas Industry,2017,37(2):92-95.
[7] 陈超,庞晶,李道清,等.呼图壁储气库全周期交互注采动态评价方法[J].新疆石油地质,2016,37(6):709-714.
CHEN Chao,PANG Jing,LI Daoqing,et al.A method for full-cycle alternative injection-production performance evaluation of Hutubi underground gas storage[J].Xinjiang Petroleum Geology,2016,37(6):709-714.
[8] 向祖平,谢峰,张箭,等.异常高压低渗透气藏储层应力敏感对气井产能的影响[J].天然气工业,2009,29(6):83-85.
XIANG Zuping,XIE Feng,ZHANG Jian,et al.The influence of stress sensitivity of abnormal high pressure and low permeability gas reservoir on the deliverability of a gas well[J].Natural Gas Industry,2009,29(6):83-85.
[9] 李大奇,康毅力,游利军.碳酸盐岩储层渗透率应力敏感性实验研究[J].天然气地球科学,2014,25(3):409-412.
LI Daqi,KANG Yili,YOU Lijun.Experimental study on permeability stress sensitivity of carbonate rocks[J].Natural Gas Geoscience,2014,25(3):409-412.
[10] 闫丰明,康毅力,李松,等.裂缝-孔洞型碳酸盐岩储层应力敏感性实验研究[J].天然气地球科学,2010,21(3):489-492.
YAN Fengming,KANG Yili,LI Song,et al.Simulated experiment on stress sensitivity in fractured-vuggy reservoir[J].Natural Gas Geoscience,2010,21(3):489-492.
[11] 何琦.沙坪场气田石炭系气藏地层水特征分析[J].天然气工业,2003,23(5):87-89.
HE Qi.Formation water characteristics of Carbonic gas reservoir in Shapingchang Gasfield[J].Natural Gas Industry,2003,23(5):87-89.
[12] 王容,李隆新,何琦,等.裂缝发育碳酸盐岩气藏气井产能变化影响因素[J].断块油气田,2020,27(3):335-338.
WANG Rong,LI Longxin,HE Qi,et al.Influence factors of deliverability change for gas wells in carbonate reservoirs with natural fractures[J].Fault-Block Oil & Gas Field,2020,27(3):335-338.
[13] 高树生,刘华勋,任东,等.缝洞型碳酸盐岩储层产能方程及其影响因素分析[J].天然气工业,2015,35(9):48-53.
GAO Shusheng,LIU Huaxun,REN Dong,et al.Deliverability equation of fracture-cave carbonate reservoirs and its influential factors[J].Natural Gas Industry,2015,35(9):48-53.
[14] 朱华银,唐立根,庞宇来,等.裂缝-孔隙型储层在交变压力条件下的渗透率变化——以四川盆地东部沙坪场石炭系气藏为例[J].天然气地球科学,2021,32(6):914-922.
ZHU Huayin,TANG Ligen,PANG Yulai,et al.Permeability changes of fracture-pore type reservoir under the conditions of alternating pressure:case study of Shapingchang Carbonate gas reservoir in eastern Sichuan Basin[J].Natural Gas Geoscience,2021,32(6):914-922.
[15] 庄惠农.气藏动态描述和试井[M].北京:石油工业出版社,2009:72-74.
ZHUANG Huinong.Gas reservoir dynamic description and well testing[M].Beijing:Petroleum Industry Press,2009:72-74.
[16] 王嘉淮,罗天雨,吕毓刚,等.呼图壁地下储气库气井冲蚀产量模型及其应用[J].天然气工业,2012,32(2):57-59.
WANG Jiahuai,LUO Tianyu,LYU Yugang,et al.Research and application of the model of gas well erosion output of the Hutubi underground gas storage[J].Natural Gas Industry,2012,32(2):57-59.
[17] 李闽,郭平,谭光天.气井携液新观点[J].石油勘探与开发,2001,28(5):105-106.
LI Min,GUO Ping,TAN Guangtian.New look on removing liquids from gas wells[J].Petroleum Exploration and Development,2001,28(5):105-106.
