The organic matter abundance of sedimentary rock is low, and there is basically no effective source rock.
沉积岩的有机质丰度低，基本无有效生油岩发育。
Exploration degree of Tarim Basin, however, is not high, so effective source rock distribution cannot be precisely defined only by geochemical index of the well sites.
而塔里木盆地勘探程度不高，仅凭井点的地化指标，是不能准确圈定有效烃源岩分布的。
Second, source rock evaluation instead of effective source rocks evaluation, which results in overvalued thickness and quality of effective source rock and abundance of organic matter.
第二是以源岩评价代替对有效烃源岩的评价，致使有效烃源岩厚度、有机质丰度以及有效烃源岩品质评价过高。
The effective reservoir of deep basin gas must have densified before the mass generation and expulsion of hydrocarbons from source rock, so do the "sweet points".
深盆气的有效储集层必须在烃源岩大量生、排烃之前就致密化，“甜点”也应在烃源岩大量生、排烃之前形成。
The distribution of effective hydrocarbon source rock is determined by combining geochemical data and logging data.
综合地球化学和测并资料确定了中上奥陶统有效烃源岩的大致分布范围。
Sequence stratigraphy provides an effective framework for basin-fill analysis and reservoir prediction, but little attention has been paid to its significance in source rock evaluation and prediction.
层序地层学为沉积盆地的充填史分析和储层预测提供了有效的格架，但其在源岩评价和预测中的意义未能引起充分的重视。
Detailed analyses of crude oils and source rock extracts indicate that there are two sets of effective hydrocarbon source rocks in eastern Pearl River Mouth Basin.
详细的原油和烃源岩抽提物分析表明，珠江口盆地东部地区存在两套有效的烃源岩。
Detailed analyses of crude oils and source rock extracts indicate that there are two sets of effective hydrocarbon source rocks in eastern Pearl River Mouth Basin.
详细的原油和烃源岩抽提物分析表明，珠江口盆地东部地区存在两套有效的烃源岩。
应用推荐