Integrity study of the CCUS wellbore in buried hill,Balixi,Jizhong
In 2020,China proposed the"dual carbon"goal,carbon dioxide oil driving and storage(CCUS)technology can achieve the purpose of carbon emission reduction while im-proving oil recovery,which is the best way to realize carbon benefit reduction under the cur-rent economic and technological conditions.The Balixi CCUS project in Jizhong is the first CCUS project in China for buried hill bottom water reservoirs,with high requirements for wellbore integrity.This paper combines the geological conditions of the block to optimize the wellbore structure in terms of completion method and borehole size.By simulating the geo-logical conditions,indoor corrosion experiments of five types of tubing,N80,P110,3Cr,9Cr,and 13Cr,are conducted,and the casing is optimized according to the corrosion law.Improve the quality of cementing through the optimization of cement paste system and cementing process.Finally,through the combination of well structure,casing selection and cementing,the integrity of wellbore will be improved to ensure the smooth progress of the CCUS project.
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维普
