Source rocks are rich in organic and inorganic matter. Organic acids are commonly found in sedimentary organic matter, are common components of immature-low mature oil and source rocks extraction.
烃源岩是一种富含有机质和各种无机矿物的集合体，而有机酸普遍存在于沉积有机质中，是未熟-低熟原油和烃源岩抽提物的常见组分。
Crude oils found in the major Chinese offshore petroliferous basins can be classified into four categories based on their maturity, i. e. immature, low mature, mature and high mature oil.
中国近海海域主要含油气盆地目前找到的原油，依成熟程度可分为未成熟、低成熟、成熟和高成熟原油四大类。
Oils currently discovered in the lower Oligocene reservoirs in Gas Hure are mainly low mature oil, with rare immature and mature oils.
尕斯库勒渐新统下部油藏中，目前找到的原油主要为低熟油，未熟油与成熟油发现不多。
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