low permeability and difficult recovery
低渗透率，难以开采
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The main characteristics of Gunan 131 fault block oil reservoir in Gudao oilfield are deep burial, low permeability, difficult water injection, low recovery percent and low recovery efficiency.
孤岛油田孤南131断块油藏的主要特征是埋藏深、渗透率低、注水困难、采出程度低、采收率低。
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