贝尔凹陷南屯组湖底扇特征及有利储集相带  

Characteristics and Favorable Reservoir Facies Belt of Sublacutrine Fan of Nantun Formation in Beier Sag, Hailaer Basin

作　　者：徐显生[1] 王建新[2] 杨婷[3] 王文第 张雷 王哲[3] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [3]中国石油大学资源与信息学院,北京102249 [4]中国石油青海油田分公司勘探开发研究院,甘肃敦煌736202 [5]中国石油煤层气有限责任公司,北京100013

出　　处：《新疆石油地质》2010年第4期361-364,共4页Xinjiang Petroleum Geology

基　　金：国家973项目(2006CB701400)

摘　　要：根据岩心、测井和粒度分析等资料,将海拉尔盆地贝尔凹陷西北部下白垩统南屯组湖底扇进一步划分为内扇、中扇和外扇3个亚相以及6个微相。由于紧邻湖底扇的半深湖-深湖相泥岩既是烃源岩,又是良好的盖层,所以湖底扇中砾岩及砂岩易形成岩性圈闭,其中以中扇辫状沟道微相砂体发育带储集条件最佳,属中孔中低渗储集层,为勘探的有利相带。The Nantun formation of Lower Cretaceous in northwestern Beier sag in Harlaer basin develops typical sublacutrine fan deposit. According to the core, well logs and grain-size analysis data, the sublacutrine fan located in the back slope and near paleohigh can be divided into three subfacies of inner, middle and outer fans and six microfacies in this region. The great height difference of geography formed by the regulatory, faulting activity in the back slope allows this area to develop large scale alluvial fan-fan delta-sublacutrine fan deposit system by the way from provenance to lacustrine basin. The mudstone in the semi-deep lacustrine-deep lacustrine near the sublacutrine fan is not only source rock, but also preferable cap rock. So the conglomerate and sandstone in the fan is favorable to form lithologic trap. The sand-body developing belt of braided channel microfacies in middle fan is the mid-porosity and mid-low permeability reservoir facies belt and favorable for petroleum exploration.

关 键 词：贝尔凹陷 南屯组 湖底扇 沉积特征 沉积模式 有利储集相带 

分 类 号：TE112.221[石油与天然气工程—油气勘探]