原油及族组分生成动力  

Kinetics of Crude Oil and Its Group-Type Generation

作　　者：魏志福[1,2] 王永莉[1,2] 邹艳荣[3] 彭平安[3] 

机构地区：[1]甘肃省油气资源研究重点实验室 [2]中国科学院油气资源研究重点实验室,兰州730000 [3]中国科学院广州地球化学研究所有机地球化学重点实验室,广州510640

出　　处：《新疆石油地质》2014年第6期646-651,共6页Xinjiang Petroleum Geology

基　　金：中国科学院战略性先导科技专项(XDB10030404);甘肃省科技计划(1309RTSA041)

摘　　要：利用黄金管-高压釜限定体系,对采自东营凹陷牛15井(沙三下亚段)和王120井(沙四上亚段)的烃源岩所制备的干酪根样品在50 MPa的恒定压力下,以2℃/h和20℃/h的升温速率分别进行程序升温热解,热解后的产物通过索氏抽提后经微型柱色谱分离为饱和烃、芳烃、非烃和沥青质。借助Kinetics2000软件获取总烃及族组分的生成动力学参数,结合东营凹陷南坡新生代烃源岩的埋藏史和热史,开展了原油及族组分生成动力学研究。结果表明,东营凹陷沙三下亚段和沙四上亚段烃源岩进入生烃门限的地质时间分别为4.26×106a和24.85×106a,沙三下亚段烃源岩目前处于主要生油阶段,而沙四下亚段烃源岩处于生油的后期阶段。现阶段,东营凹陷沙三下亚段烃源岩生成的饱和烃、芳烃、非烃和沥青质的累计产率分别为222.03 mg/g,71.30 mg/g,62.37 mg/g和50.04 mg/g;而沙四上亚段烃源岩生成的饱和烃、芳烃、非烃和沥青质的累计产率分别为282.94 mg/g,98.98 mg/g,66.79 mg/g和53.82 mg/g.Pyrolysis of two kerogens isolated from Niu-15 well （E3s3） and Wang-120 well （E2s14） source rocks in the Dongying sag of Bohai Bay basin was performed in a confined system under pressure of 50 MPa at temperature of 2℃/h and 20℃/h.The generated products were extracted with solvent and separated using micro-column chromatography into group-type fractions like saturates,aromatics,resin and asphaltene.Kinetics 2000 software was employed to fit the kinetic parameters,including the total hydrocarbons and group composition produced from the two kerogen samples.The generation kinetics study of crude oil and its group-type fractions from the kerogens shows that the oil thresholds that the E3s3 and the E2s41 source rocks were generated at about 4.26 × 106 a and 24.85× 106 a,respectively,and the E3s3 source rocks are still in the main phase of hydrocarbon generation,while the E2s14 source rocks in the late phase.At present,the yields of saturates,aromatics,resin and asphaltene from the E3s3 source rocks are 222.03 mg/g,71.30 mg/g,62.37 mg/g and 50.04 mg/g,while those from the E2s14 source rocks are 280.94 mg/g,95.98 mg/g,66.79 mg/g and 53.82 mg/g,respectively.

关 键 词：生烃动力学 烃源岩 干酪根 族组分 东营凹陷 

分 类 号：TE112.11[石油与天然气工程—油气勘探]