Research on well leakage risk identification technology based on geo-engineering integration in Weiyuan Block
In order to cope with the deeper faults of Maokou Formation and Longmaxi Formation in Weiyuan shale gas field,which are more developed and have complicated fracture distribution,and it is difficult to accurately identify the risk of well leakage by ordinary seismic interpretation,and to reduce the rate of well leakage accidents,the application of geo-engineering integration technology in drill-ing field was studied,and the geo-engineering integration technology of well leakage risk identification in Weiyuan was put forward,and the well seismic integration refinement modeling for the key stratums was carried out.Maximum likelihood attribute technology was se-lected to identify faults,drilling tool combinations was optimized,and on-site+remote linkage guarantee technology to avoid drilling well leakage risk formations was adopted in conjunction.The results of field operation showed that the geological integrated well leakage risk identification technology can effectively predict high-risk faults and avoid well leakage risks,and the accident complexity rate after ap-plying the geo-engineering integration technology decreased by 14 percentage points,ensuring the safety and high efficiency of the drill-ing operation,and creating a construction model of well leakage problem in Weiyuan Block,and the relevant results can provide refer-ence for similar engineering problems.
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