This type of lake is often deep and has steep banks.

这种类型的湖泊往往是浸泡在深处的沙洲。

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In the deep lake sedimentary environment, the oil source is adequate with higher maturity and better type of organic matter near the concave because of the high seal of faults.

达尔其油田深湖环境有机质类型比较好，成熟度比较高，由于断层封隔性比较强，距离洼陷越近，油源越充足。

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