Key engineering technologies of one-million-ton CCUS transportation-injection-extraction in Shengli Oilfield
CCUS technology is a crucial technology for achieving the goal of"dual carbon",involving process such as capture,transportation,injection,extraction and re-injection.Shengli Oilfield has developed essential engineering technologies for transportation and injection through years of exploration.To manage the phase changes of CO2 and the risks of long-distance leakage due to pressure loss and temperature variations,a safety transportation technology for long-distance CO2 pipelines was established.This technology is based on phase state control,ensuring efficient and cost-effective transportation.developed China's first casing pipeline transport pump;and built China's longest long-distance supercritical pressure CO2 pipeline,which makes up for the shortcomings of the long-distance CO2 transport in China.In order to meet the needs of high-pressure injection of large-displacement CO2 in the demonstration project,China's first high-pressure dense-phase injection pump has been developed,realizing high-pressure dense-phase injection of 40 MPa.In view of the problems of high injection pressure,high gas-to-liquid ratio,low pumping efficiency,and corrosion of CO2,the engineering process technology of injection and extraction supporting such as safe injection of gas pipeline columns for pressure-free wells,multi-functional oil recovery pipeline columns,and corrosion prevention of CO2 repulsion has been formed to realize high-efficiency,safe injection and extraction and long-lasting corrosion protection.China's first multi-field,multi-node,one-million-ton CCUS demonstration project integrating pipeline transport engineering,injection equipment,flooding and sequestration,injection-extraction process,and gathering-transmission and re-injection,has been operating well and realizing"smooth,safe,efficient and green"operation in all aspects.This summary of the one-million-ton CCUS transportation-injection-extraction process and supporting equipment in Shengli Oilfield is intended to provide reference and guidance for the construction of subsequent CCUS project.
flooding and sequestrationfull chainpipeline transportationground engineeringinjection-extraction processShengli Oilfield
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