东濮凹陷卫城 文明寨地区原油地球化学特征

Investigation on geochemistry character istics of
crude oil from W e icheng-W enm ingzha i area in Dongpu
Depression

1 中国石油大学地球资源与信息学院, 山东东营257061; 2 中原油田分公司勘探开发科学研究院, 河南濮阳457001

( 1. College of G eo - Resources
and Informat ion, China University of P etroleum,
Dongy ing 257061; 2. Exploration & D eve lopment
R esearch Institute of Zhongyuan O ilf ield Company,
SINOPEC, Puyang 457001, China),

The g roup com po sition of oi,l chrom atogram and m ass
spectrum o f alipha tic we re analysed on the samp les o f source
rocks and crude o il fromW e icheng- W enm ingzha i area in the
Dongpu Depression. The resu lts dem onstrated tha t there w ere
three types o f o il in the area. The imma ture o i,l d istr ibu ted in
the M em be r 1, M em be r 2 and M em be r 3 of Shahejie
Fo rma tion was cha racte rized by h igh content o f C27 steranes
and gamm ance rane, and its hydrocarbon source m atte r w as
m a inly from the import of hydrophilic b io logy and formed in
the m idd le- sa lt w ater lake. The few er sam ple o f imm ature
o il in theM ember 1 o f Shahe jie Form a tion was charac terized
by high content o f C29 steranes and low content of
gamm ancerane, and its hydro carbon sourcem atterw as ma in ly
from the im po rt o f altitude plant and fo rm ed in the tiny salt
w ater lake. The fewe r sam ple o f ma ture o il in theM ember 3
and M em be r 4 of Shahe jie Form ation was charac terized by
h igh content o f C27 steranes and gamm ance rane, and its
hydrocarbon source m atte r w as m a inly from the im po rt of
hydroph ilic biology and form ed in the h igh- sa lt w ater lake