塔里木盆地石炭系巴楚组有一生屑灰岩段碳酸盐岩烃源岩,主要为台地边缘—台缘斜坡相沉积,厚度40m 左右。烃源岩中干酪根主要为Ⅱ型,其次为Ⅲ型;腐泥组含量较高,一般大于50％,主要由碎屑类脂体、藻类体、孢子体和角质体组成;钻井揭示的 TOC 值为0.10％～1.27％。已在麦盖提斜坡上倾部分曲1井和曲3井中获得来源于该碳酸盐岩烃源岩的工业性原油。与源自下古生界烃源岩的原油相比,该油源的原油具有下述特征:Pr/Ph 值偏高,反“L”型分布的规则甾烷,三环萜烷/藿皖值较低,较高含量的四环萜皖,偏重的全油和族组分碳同位素值等。 Carboniferous source rocks of the Carboniferous Bachu Formation in the Tarim Basin consist of a bioclastic limestone, mainly consisting of the marginal-platform margin of the platform margin with a thickness of about 40 m. The kerogen is mainly type Ⅱ, followed by type Ⅲ. The sapropelite is relatively high, usually more than 50%, and is mainly composed of clastic lipid bodies, algal bodies, sporophytes and keratoplasts. The TOC The value is 0.10% ~ 1.27%. Industrial crude oils derived from this carbonate source rock have been obtained in the upper Devonian Quid-1 and Qu-3 wells on the Mageti slope. Compared with the crude oil derived from the Lower Paleozoic source rocks, the crude oil of the oil source has the following characteristics: regular sterane, tricyclic terpane / hopan with high Pr / Ph value and anti-“L” Lower value, higher content of tetracyclic terpene Anhui, partial emphasis on the whole oil and carbon isotope composition values.