深洼区岩性油气藏成藏机理研究与思考

Reservoir-Form ing Mechanism of the Lithological Pools in Deep Subdepression

( 1 石油大学地球资源与信息学院, 东营; 2 胜利油田有限公司地质科学研究院)

( 1. Faculty of Earth R esource and
M essage, China University of Petro leum, Dongy ing
257061, 2. Geologica l Scientif ic R esearch Institute,
ShengliO ilf ie ld Co. Ltd. , SINOPEC, D ongying 257015,
China

Based on ana lyzing the g enesis types and reservo irform
ing course of litholog ica l trap in the deep subdepress ion
in the downfaulted basin, reservo ir- fo rm ing m echanism of
litho log ical poo l is subtle passage and episod ic rep lacem ent.
The Derived results is tha t litho log ical traps arem in iature o i-l
gas gathering and transferr ing sta tions in course of
hydrocarbon m ig ra tion and accumu la tion, the hydro ca rbon of
num erous litho locg ical pools is episodically gathe red by the
fau lts, form ing large and m edium size tectonic poo ls. At the
sam e time, the fo rm ation w ater o f litho log ica l traps, such as
the sand lens, is e jected continua lly. It resu lts in that the o il
and gas is annular ly distributed outside the basin during the
ea rly stage and inside the basin dur ing the la te stag e. The
effort bene fits the exp lo ra tion o f the subtle reservo irs in the
dow nfau lted basins.