生物降解作用对芳烃生物标志物参数的影响研究  

STUDY OF BIODEGRADATION EFFECT ON AROMATIC BIOMARKER PARAMETERS

作　　者：倪春华[1] 包建平[2] 顾忆[1] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所,江苏无锡214151 [2]长江大学地球化学系,湖北荆州434023

出　　处：《石油实验地质》2008年第4期386-389,共4页Petroleum Geology & Experiment

基　　金：国家“十五”重点攻关项目(2001BA605A02-03-01)

摘　　要：在大多数情况下,生物降解作用是造成原油变稠的最主要原因。目前,生物降解作用对饱和烃生物标志物和含氮化合物及参数的影响研究较多,而对芳烃生物标志物及参数的研究较少。选取渤海湾盆地渤中凹陷4个不同降解程度的原油样品,采用GC-MS分析测试,初步探讨了自然条件下,生物降解作用对原油中一些芳烃生物标志物参数(主要是成熟度指标)的影响。结果表明:运用甲基萘比(MNR)计算降解原油的成熟度时,结果比降解前的实际值小;运用甲基菲比(MPR)计算降解原油的成熟度时,结果比降解前的实际值大;而运用三芳甾烷/单芳甾烷(TAS/MAS)计算降解原油的成熟度时,基本不失真。In most cases, biodegradation is the main factors which cause the crude oil sticky. At present, biodegradation effect on saturated hydrocarbon biomarkers, nitrogen compounds and their parameters is mostly studied, with less attention is paid to the research of aromatic biomarker parameters. Four oil samples with different degraded degrees in Bozhong Sag of the Bohai Bay Basin are selected. By using GC-MS tests, the biodegradation influences on some aromatic biomarker parameters in crude oils especially on maturity indicators under natural conditions is preliminarily discussed. The results indicate that the maturity of oil degradation calculated by using methyl naphthalene ratio （MNR） is less than that before degradation, and the maturity calculated by using methyl phenanthrene ratio （MPR） is larger than that before degradation. However, the maturity of oil degradation calculated by using triaromatic steroid/monoaromatic sterane （TAS/MAS） ratio is basically undistortion.

关 键 词：生物降解作用 芳烃生物标志物 成熟度 原油 渤海湾盆地 

分 类 号：TE135.4[石油与天然气工程—油气勘探]