Progress and next development directions of gas storage technologies in Shengli Oilfield
Underground natural gas storage is an essential infrastructure for strategic reserves,emergency peak shaving,and na-tional energy security.It is also one of the directions for optimizing the industrial layout of mature oilfields and promoting green and low-carbon transformation and development.The geological conditions of Shengli Oilfield are complex,with shallow gas reser-voirs,small scale,scattered distribution,and abundant oil and water trap resources.However,it is difficult to evaluate the sealing property.In view of these characteristics,significant progress has been made in research related to gas storage since the"Thirteenth Five-Year Plan in 2016-2020"period.Different types of gas storage,such as loose sandstone gas reservoirs,gas cap oil reservoirs,and aquifers,have been studied and designed,and the first gas storage in abandoned water-flooded gas reservoirs in China,Y21 Gas Storage,has been built.Key technologies such as target screening and evaluation of gas storage in aquifers,injection and pro-duction operation optimization design of gas storage in aquifers,sealing evaluation of gas storage traps,and tracking evaluation of gas storage have been developed,which align with characteristics of Shengli Oilfield.At present,the construction of other types of gas storage still faces challenges such as limited data,small scale,poor efficiency,and difficulty in evaluating the dynamic sealing of traps.It is necessary to propose corresponding technical countermeasures and research directions in the site screening and evalua-tion of gas storage in oil reservoirs,the construction of gas storage in combination with scattered gas sand bodies,and the collabora-tive construction of gas storage in oil reservoirs with high water cut,to provide technical support for the large-scale construction and green development of gas storage in Shengli Oilfield.
Shengli Oilfieldgas storageaquiferloose sandstonescreening and evaluationsealing of trapinjection and produc-tion operationtracking evaluation
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