Therefore, it is vital to avoid gas channeling in the cementing operation.
因此，固井过程中有效地防止气窜的发生尤为重要。
But the cementing operation is very difficult because of the complicated formation pressure system.
而调整井具有地层压力系统复杂的特点，给固井施工带来很大难度。
But the cementing operation is very difficult because of the complicated formation pressure system.
而调整井具有地层压力系统复杂的特点，给固井施工带来很大难度。
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