利用测井曲线判识鸳鸯湖矿区成煤环境及沉积类型  

Identification of Coal-forming Environments and Sedimentary Types in Yuanyanghu Mine Area through Logging Traces

作　　者：苗争鸣 

机构地区：[1]宁夏回族自治区煤田地质局,宁夏银川750011

出　　处：《中国煤炭地质》2009年第11期55-58,共4页Coal Geology of China

摘　　要：根据以往钻孔及其测井资料,对鸳鸯湖矿区早—中侏罗世延安期的沉积环境及沉积类型进行了划分:即垂向正层序湖泊三角洲平原相沉积与反层序的三角洲前缘相、湖湾相沉积。前者表现为浅湖泊三角洲的推进,后者表现为浅湖泊三角洲的废弃。其中三角洲平原相沉积类型包括分流河道天然堤沉积组合,决口扇泛滥平原沉积组合,以及泥炭、沼泽沉积组合;三角洲前缘相沉积类型包括河口坝沉积(近端坝、远端坝)、水下分流河道沉积、水下天然堤、分流间湾沉积。通过对比各种沉积组合在自然伽马、视电阻率等测井曲线形态上的反映特征,指出测井曲线异常形态能够反映本区的沉积旋回,并以此总结出了鸳鸯湖矿区的成煤环境、沉积旋回的划分及聚煤规律。On the basis of past boreholes and their logging data, divided sedimentary environments and types of early to middle Jurassic Yanan Age, namely vertical normal sequence lacustrine dehaie plain sediments and reverse sequenee delta front facies and lacustrine bay facies sediments. The former implies shallow lake delta advaneing, while the later abandoning. The deltaic plain facies sedimentary types include distributary channel levee, erevasse splay flood plain, peat and swamp sedimentary eombinations; delta front facies sedimentary types have debouch bar （proximal bar, distal bar）, subaqueous distributary channel, subaqueous levee and interdistributary bay sediments. Through contrast of reflection characteristics of various sedimentary combinations on natural gamma, apparent resistivity and other logging traces, pointed out the abnormal shapes of logging traces can reflect sedimentary cycles in the area, and summed up coal-forming environments, division of sedimentary cycles and coal-accumulating patterns in the Yuanyanghu mine area.

关 键 词：沉积环境 沉积相 沉积旋回 测井曲线 视电阻率测井 自然伽马测井 鸳鸯湖矿区 

分 类 号：P631.8[天文地球—地质矿产勘探]