CAJ | 학술논문

塔中北坡SH9井区在柯坪塔格组下段首次发现了中-轻质黑油,具有低粘度、低含硫、低凝固点、高含蜡等特征。族组分中总烃含量、饱芳比均较大,碳同位素轻,小于-31‰。正构烷烃总体为单峰、前峰型分布,正构烷烃保存相对完整,但有轻微的“鼓包”( UCM峰),具有轻微生物降解的特征；CPI值为1.04~1.05,Pr/Ph值为0.84~0.94,不具备奇偶优势,有明显的植烷优势。规则甾烷均呈“V”字形分布,C2820R甾烷相对含量小于25%,C29甾烷含量高于C27甾烷,重排甾烷、升孕甾烷和孕甾烷的相对含量较高。三环萜烷系列的丰度高于藿烷系列,并在三环萜烷中表现为C23三环萜烷的丰度优势,伽马蜡烷含量也较高。原油具有硫芴优势,三芳甲藻甾烷和甲藻甾烷欠发育；成熟度指标表征其为成熟油。认为该原油主要来源于中、上奥陶统烃源岩,中、下寒武统烃源岩贡献不明显。
탑중북파SH9정구재가평탑격조하단수차발현료중-경질흑유,구유저점도、저함류、저응고점、고함사등특정。족조분중총경함량、포방비균교대,탄동위소경,소우-31‰。정구완경총체위단봉、전봉형분포,정구완경보존상대완정,단유경미적“고포”( UCM봉),구유경미생물강해적특정；CPI치위1.04~1.05,Pr/Ph치위0.84~0.94,불구비기우우세,유명현적식완우세。규칙치완균정“V”자형분포,C2820R치완상대함량소우25%,C29치완함량고우C27치완,중배치완、승잉치완화잉치완적상대함량교고。삼배첩완계렬적봉도고우곽완계렬,병재삼배첩완중표현위C23삼배첩완적봉도우세,가마사완함량야교고。원유구유류물우세,삼방갑조치완화갑조치완흠발육；성숙도지표표정기위성숙유。인위해원유주요래원우중、상오도통경원암,중、하한무통경원암공헌불명현。
In the lower Kalpintag Formation in SH9 well area in the northern slope of the middle Tarim Basin, medium-light black oil has been discovered for the first time and is characterized by low viscosity, low sulphur content, low pour point and high wax content. The total hydrocarbon content and the saturated/aromatic hydro-carbon ratio are high, while the carbon isotope is light, usually less than-31‰. Normal alkane totally shows the features of single peak and front peak types. The preservation of normal alkane is relatively complete with slight“drum kits” (UCM peak), showing slight degradation characteristics. The CPI value is 1. 04 ~1. 05 and the Pr/Ph value is 0. 84~0. 94. Normal alkane has no odd-even predominance and has apparent phytane advan-tage. Regular sterane shows “V” type distribution. The relative content of C2820R sterane is less than 25% and the content of C29 sterane is higher than that of C27 sterane. The relative contents of rearranged sterane, ascend-ing pregnane and pregnane is relatively higher. The abundance of tricyclic terpane series is higher than that of hopane series, and the C23 tricyclic terpane has abundance advantage in tricyclic terpane. The content of gam-macerane is also higher. In the crude oil, sulfur fluorine is rich while triaromatic dinosterane and dinosterane are lack. Maturity parameter shows that the oil is mature. The Middle and Upper Ordovician serve as the main sources while the Middle and Lower Cambrian contribute little.