松辽盆地北部古中央隆起带白垩系登娄库组沉积相及天然气富集有利地区

松辽盆地北部古中央隆起带登娄库组是天然气的重要产出层段之一，现有多口钻井产工业气流，区内登娄库组可分为四段，主要为河流相、浅湖砂坝及滨浅湖沉积。隆起区为河流沉积区，边缘为滨浅湖及河流交替沉积。砂岩中孔隙以次生粒间溶孔为主，发育程度与岩性和次生浊沸石的选择性溶蚀有关，研究表明，登娄库组三段是区内最有利的储集层段，最有利于聚集的地区为靠近气源区的古中央隆起带东部。

SEDIMENTARY FACES AND FAVORABLE AREAS FOR GAS ACCUMULATEON OF THE CRETACEOUS,DENGLOUKUFORMATION IN THE CENTRAL PALEO-UPLIFT ZONE,NORTHERN SONGLIAO BASIN

The Dengloku Formation is one of the mojor section,which contains abundent natural gas,in the central paleo-uplift zone of the northern Songliao Basin. Natural gas has been obtained in some wells.the Denglouku Formation can be divided into four members.The sedimentary facies are mainly fluvial facies,shallow lacustrine and coastal facies. The fluvial deposits occur in the cenrtral part of the paleouplift zone ,the coast and shallow lacustrine deposits develop on the both sides of the paleo-uplift zone. The secondary porosity develop in sandstone. It is controlled by the lithology and the selective dissolution of laumonite.The most favorable reservoir develops in the third member of the Denglouku Formation.The east part of the central paleo-uplift zone is the best area of gas accumulation.It is next to the source area.