大民屯凹陷西部斜坡带沙四段成藏条件分析

Analysis of Hydrocarbon A ccumulation Condition of the Fourth Section of Shahejie Formation in Western Slope Zone of Damintun Depression

( 1 西南石油大学, 四川成都610500; 2 辽河油田分公司, 辽宁盘锦124010 )

 Southwest Pe troleum University,
Chengdu 610500, China

Through systema tic ana lys is o f hydrocarbon accumu la tion
cond ition for the fourth section o f Shahe jie Form ation in
w esten s lope zone of Dam intun depression, it is conside red
tha t the favorab le traps o f western slops are the we ll zones of
o il and gas accum ulation. And the key cond itions of reservo ir
form ation are the d istr ibu tion o f the sand body and the
physica l property o f reservo ir beds. The source rock is ma in ly
the mud shale and the reservo ir beds are tigh t fan de lta,
alluv ia l fan and lim netic sand stone w hich is all from the
four th sec tion of Shahe jie Fo rm ation. The source- reservo irseal
assem blage is fo rm ed, wh ich is se l-f generation and sel-f
accumu lation contro lled by sedim entary and tectonic action.