CAJ | 학술논문

鄂尔多斯盆地苏里格气田是我国最大的气田，但是储层岩性较为致密，已成为制约天然气勘探开发的主要因素，因此，开展储层孔隙结构特征研究对于该区天然气生产具有重要意义。通过扫描电镜、薄片鉴定、压汞、铸体薄片等分析测试方法对苏里格气田苏54区块储层微观孔隙结构进行了深入分析。结果表明：该区储层由北到南主要发育岩屑砂岩、岩屑质石英砂岩和石英砂岩；喉道半径普遍较小，孔喉分选较差，且以细孔径为主，孔喉连通性中等；孔渗普遍偏低，属低孔低渗，孔渗明显受沉积相带的控制，高孔渗区呈贯穿南北的条带状分布，与河道展布特征近似。研究表明物性高值区连片分布，东部好于西部，盒8下物性最好。
악이다사분지소리격기전시아국최대적기전，단시저층암성교위치밀，이성위제약천연기감탐개발적주요인소，인차，개전저층공극결구특정연구대우해구천연기생산구유중요의의。통과소묘전경、박편감정、압홍、주체박편등분석측시방법대소리격기전소54구괴저층미관공극결구진행료심입분석。결과표명：해구저층유북도남주요발육암설사암、암설질석영사암화석영사암；후도반경보편교소，공후분선교차，차이세공경위주，공후련통성중등；공삼보편편저，속저공저삼，공삼명현수침적상대적공제，고공삼구정관천남북적조대상분포，여하도전포특정근사。연구표명물성고치구련편분포，동부호우서부，합8하물성최호。
Sulige gas field in Ordos basin is the biggest gas field,but the lithology of reservoir bed is very compact, which is becoming the main limitative factor for exploration and exploitation of natural gas. It is significant for output of natural gas in this area to understand the characteristics of pore structure of reservoirs. The micro - pore structure of reservoirs in the 54 block of Sulige gas field are conducted by means of observation of SEM, slice identification, casting slice and mercury injec-tion. Results show that: ①litharenite, Lithic quartz sandstone and quartz sandstone successively develop from north to south in the block; ②small pore-throat radius, poor sorting, mainly to small aperture and medium connectivity;③low-porosity, low-permeability. The permeability is controlled by sedimentary band. High- permeability areas stripped distribute through north and south, which are similar to the distribution of riverways. High-physical property areas contiguously distribute, east is better than west, and the best physical property areas are in He8 .