沉积与特提斯地质
沉積與特提斯地質
침적여특제사지질
SEDIMENTARY GEOLOGY AND TETHYAN GEOLOGY
2009年
4期
73-78
,共6页
比如盆地%碎屑岩%储层%储层评价
比如盆地%碎屑巖%儲層%儲層評價
비여분지%쇄설암%저층%저층평개
Biru Basin%clastic rock%reservoir%reservoir assessment
比如盆地北部比如-那曲-索县地区碎屑岩储层发育于中下侏罗统希湖群、中上侏罗统拉贡塘组、下白垩统多尼组和上白垩统竞柱山组.通过储集物性和成岩作用等研究,认为比如盆地北部地区碎屑岩成岩作用较为强烈,多属于晚成岩期.储集空间类型以次生溶孔为主,孔隙结构主要为微-细孔微喉型.储层的物性主要受成岩作用、岩性和沉积相控制.竞柱山组物性较好,拉贡塘组次之,希湖群和多尼组的物性较差.
比如盆地北部比如-那麯-索縣地區碎屑巖儲層髮育于中下侏囉統希湖群、中上侏囉統拉貢塘組、下白堊統多尼組和上白堊統競柱山組.通過儲集物性和成巖作用等研究,認為比如盆地北部地區碎屑巖成巖作用較為彊烈,多屬于晚成巖期.儲集空間類型以次生溶孔為主,孔隙結構主要為微-細孔微喉型.儲層的物性主要受成巖作用、巖性和沉積相控製.競柱山組物性較好,拉貢塘組次之,希湖群和多尼組的物性較差.
비여분지북부비여-나곡-색현지구쇄설암저층발육우중하주라통희호군、중상주라통랍공당조、하백성통다니조화상백성통경주산조.통과저집물성화성암작용등연구,인위비여분지북부지구쇄설암성암작용교위강렬,다속우만성암기.저집공간류형이차생용공위주,공극결구주요위미-세공미후형.저층적물성주요수성암작용、암성화침적상공제.경주산조물성교호,랍공당조차지,희호군화다니조적물성교차.
The clastic reservoirs in the Biru-Nagqu-Sog zone in northern Biru Basin, Xizang are developed in the Lower-Middle Jurassic Xihu Group, Middle-Upper Jurassic Lagongtang Formation, Lower Cretaceous Duoni Formation and Upper Cretaceous Jingzhushan Formation. These clastic rocks are now in the late diagenetic stage. The porosity types include secondary solution openings with micropores to microthroats. The reservoir quality is better in the Jingzhushan Formation, followed by the Lagongtang Formation, whereas worse in the Xihu Group and Duoni Formation.
