CAJ | 학술논문

塔里木盆地原油酸值总体不高,一般低于3 mg/g,三叠系、侏罗系原油酸值相对较高,一般在0.96～1.12 mg/g,但也只有部分地区原油刚达到高酸原油级别(酸值为1.0～5.0 mg/g),石炭系、奥陶系原油酸值较低,大部分在0.5 mg/g以下.塔里木盆地原油属于混合型中、低酸原油,有机酸主要来自于原油的生物降解,少量为原生的有机酸.奥陶系碳酸盐岩油藏原油曾经历严重降解,但产生的大量有机酸在随后的酸-岩反应中被消耗,呈高降解低酸值特征,侏罗系、三叠系、石炭系原油酸值的形成主要与地层水活动造成的晚期降解有关.图9表1参33
탑리목분지원유산치총체불고,일반저우3 mg/g,삼첩계、주라계원유산치상대교고,일반재0.96～1.12 mg/g,단야지유부분지구원유강체도고산원유급별(산치위1.0～5.0 mg/g),석탄계、오도계원유산치교저,대부분재0.5 mg/g이하.탑리목분지원유속우혼합형중、저산원유,유궤산주요래자우원유적생물강해,소량위원생적유궤산.오도계탄산염암유장원유증경력엄중강해,단산생적대량유궤산재수후적산-암반응중피소모,정고강해저산치특정,주라계、삼첩계、석탄계원유산치적형성주요여지층수활동조성적만기강해유관.도9표1삼33
Crude oil in Tarim Basin belongs to mixed-type low and medium-acidity oil. Organic acids in the oil come mainly from biodegradation of the oil, and secondly from original organic acids. The oil has a lower acid number, below 3 mg/g in general, and the oil of Triassic and Jurassic reservoirs in the Lunnan area has a relatively high acid number, about 0. 96-1.12 mg/g, only some local oil reaches the level of the high-acidity oil (1.0-5.0 mg/g) ; the oil in Ordovieian and Carboniferous reservoirs has a lower acid number, mostly below 0.5 mg/g. The oil in Ordovician carbonate reservoirs experienced intense degradation, but the followed acid-rock reaction consumed almost all the early organic acids and depressed the oil acidity. The Jurassic, Trassic and Carboniferous oil acidity is related to the late-biodegradation due to active formation water.