南襄盆地泌阳凹陷油气成藏体系及资源潜力

Hydrocarbon Accumulation System and Its R esource
Potent ial in Biyang Depression of Nanxiang Basin

余功铭1, 2 王德发1 张绍华2 曾庆才1

Yu Gongming  ,Wang Defa, Zhang Shaohua
et al

1 中国地质大学, 北京100083; 2 河南石油勘探局勘探开发研究院, 河南南阳473132

1. China University of Geosciences,
Beijing 100083; 2. Research Institute of Exploration and
Deve lopment, H enan Oilfield Company, SINOPEC,
Nanyang 473132, China

Sou rce rocks are deve loped in H etaoyuan Form ation o f
B iyang depress ion, where organ icm a tter abundance is high,
the po tential of hydrocarbon genesis is h igh, m ost o f them a jo r
sou rce rocks a re m ature and r ich hydrocarbon resources are
form ed. Bo th in the sou th and north, the fan de lta system s
ex tends m ostly into the o il source area, m any sets o f crossover
and superposed assem blag es o f source, reservo ir and cap
rocks are form ed vertica lly. The hydro ca rbon transferr ing
system arem a in ly com posed o f sandbod ies and fau lt system,
the d ifferences betw een the pore structura l distribution w ith in
the sandbodies result in an advantageous hydrocarbon
m igrating pa th. So far, the exploration and exploita tion o f the
o il and gas m a inly concentrate on the above H 3 in B iyang
Depression. As it has been ser iously explored and deve loped,
to find r ich o il and gas traps becom es m ore and m ore
d ifficu lt. In o rder to increase the o il reserves and stabilize the
y ie lds, the exp lo ra tion v ision should be expanded and theexploration field shou ld be en larged. The nex t step
exploration fo r B iyang Depression shou ld focus on the o il and
gas o f the deeper layer and the sha llowe r layer. The deeper
layer sy stem includes the low er H 3 and Dacangfang
Fo rma tion. The sha llowe r layer system inc ludes the H 2, H 1
and the uncon fo rm ity top o f L iaozhuang Forma tion.