海相油气地质2017，Vol.22Issue(1)：32-38,7.DOI:10.3969/j.issn.1672-9854.2017.01.004
塔里木盆地西南地区早中寒武世岩相古地理
Lithofacies Paleogeography of Early-Middle Cambrian in Southwestern Tarim Basin
摘要
Abstract
The controversy over lithofacies paleogeography of Early-Middle Cambrian affected the hydrocarbon evaluation in southwestern Tarim Basin. According to outcrops, wel and seismic data,the study of sedimentary facies and seismic facies was carried out, and the model of lithofacies paleogeography of Early-Middle Cambrian in southwestern Tarim Basin was reconstructed based on the tectonical background. Control ed by sea level change and paleogeographic pat ern, there developed some facies including shelf, open platform, restricted platform, evaporate platform and gentle slope in Lower-Middle Cambrian. In Late Sinian, low uplifts formed in southern Maigaiti Slope, and thus a paleogeographic pat ern of ocean basin-passive continental margin-intercraton depression distributed from south to north. In passive margin(south to the uplifts), gentle slope facies and shelf facies developed. In the south margin of craton depression(Maigaiti Slope), the tidal-flat facies of restricted platform and evaporate platform mainly developed with thin stratum. In the inner part of craton depression(Bachu Uplift), gypsum-salt lake developed due to hot and dry climate, and poor water circulation. Source rock developed in the residual part of passive continental margin. Reservoir-cap assemblage of gypsum-salt rock and underlying carbonate distributed in Bachu Uplift and Maigaiti Slope. Thus there are good prospects for petroleum exploration in Lower-Middle Cambrian, southwestern Tarim Basin.关键词
塔里木盆地/寒武纪/烃源岩/沉积相/古地理Key words
Cambrian/Source rock/Sedimentary facies/Paleogeography/Tarim Basin分类
能源科技引用本文复制引用
姜海健,储呈林,杨鑫,陈强路,岳勇,邵志兵..塔里木盆地西南地区早中寒武世岩相古地理[J].海相油气地质,2017,22(1):32-38,7.基金项目
本文受中石化科技部项目"巴麦地区古生界油气成藏条件与勘探方向"(编号:P10023)及中石化西北石油局项目"塔里木盆地南部奥陶纪岩相古地理研究"(编号:KY-2013-S-039)资助 （编号:P10023）
