二苯并呋喃地球化学研究进展及作为油藏充注示踪标志物的化学机理

doi:10.11743/ogg20120419

摘要/Abstract

摘要：

二苯并呋喃及其烷基取代系列(DBFs)的结构和性质与二苯并噻吩及二苯并吡咯(咔唑)化合物类似,其相对含量和总量的变化受热成熟作用和地色层分馏效应影响。基于氧原子与输导层介质氢键形成机理及二苯并呋喃分子极性理论,在石油运移过程中,二苯并呋喃同样产生与咔唑类含氮化合物类似的运移分馏效应。从化学机理上对二苯并呋喃含氧化合物作为运移示踪标志物进行了理论解释,并加入氘代二苯并呋喃为标样,求得二苯并呋喃含氧化合物的绝对含量。以塔河油田海相原油和北部湾盆地福山凹陷陆相原油为代表,对DBFs在沉积环境和成熟度判识中的应用进行了研究。根据原油中二苯并呋喃总量和咔唑类含氮化合物总量的对比,证实了二苯并呋喃含氧化合物的运移分馏效应,提出原油中二苯并呋喃类化合物的总量可作为有效的油藏充注途径示踪参数。

关键词: 二苯并呋喃, 沉积环境, 运移分馏效应, 油藏充注途径, 示踪标志物, 地球化学, 塔河油田, 福山凹陷

Abstract:

Dibenzofuran and its alky homologues(DBFs)possess the same structure and characteristics as dibenzothiophenes and carbazoles,and their relative and total abundances are constrained by thermal-maturation and migration fractionation.Based on the hydrogen bond mechanism and the polarity caused by dipoles,dibenzofuran can also produce migration fractionation effect similar to that of carbazoles during oil migration.This paper states the chemical mechanism of the migration fractionation caused by dibenzofurans during its migration process and calculates the relative abundances of dibenzofurans by using deuterium substituted dibenzofuran as internal standard.Taking oil samples from the Tahe oilfield as typical marine oil example and those from the Fu- shan depression of Beibuwan Basin as non-marine oil example,this paper studies the depositional environment and organic matter thermal maturity by using DBFs-related geochemical parameters.By comparing with the total content of carbazoles,it is concluded that the total content of DBFs can also be used as effective geochemical parameters for tracing of oil charging pathways.

Key words: dibenzofuran, depositional environment, migration fractionation, oil charging pathway, molecular tracer, geochemistry, Tahe oilfield, Fushan Depression

中图分类号:

TE122.1

张利文,李美俊,杨福林. 二苯并呋喃地球化学研究进展及作为油藏充注示踪标志物的化学机理[J]. 石油与天然气地质, 2012, 33(4): 633-639. doi: 10.11743/ogg20120419 Zhang Liwen,Li Meijun,Yang Fulin. Progress of geochemical research on dibenzofuran and its chemical mechanism as molecular tracer for oil charging pathways[J]. Oil & Gas Geology, 2012, 33(4): 633-639. doi: 10.11743/ogg20120419

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