川西须二气藏具有其自身的特点，新851井为川西须二气藏气井，具有高温、高压、高产且含CO2的特征，由于多种原因导致被迫封井。
New 851 well is a T3x2 gas well in the west of Sichuan basin, having the characteristics of high temperature, high pressure, high output and CO2-bearing.
因此，有效解决高压、高产气井勘探开发过程中的井控理论和井控技术难题已显得十分重要。
Therefore, it is of great important to solve the existing major safe technical difficulties in the process of exploration and development of high pressure and high gas rate Wells.
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