沉积认识下吐鲁番—哈密盆地吉深1地区中—下侏罗统水西沟群地层对比格架的建立  

Establishment of Stratigraphic Framework on Sedimentological Interviewing of the Jurassic Shuixigou Group in Jishen-1 Area, Turpan—Hami Basin

作　　者：赵晓东[1] 杨少春[1] 陈宁宁[2] 张喜 陈国宁[1] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石化胜利油田地质科学研究院,山东东营257001 [3]中国石油吐哈油田分公司开发部,新疆鄯善838202

出　　处：《地质论评》2013年第4期656-664,共9页Geological Review

基　　金：国家科技重大专项课题(编号2011ZX05009-003);中央高校基本科研业务费专项资金资助项目(编号13CX06013A)的成果

摘　　要：根据岩芯观察结果,结合区域地质、钻井及测井资料分析表明吐鲁番—哈密盆地吉深1地区中—下侏罗统水西沟群地层为辫状河三角洲沉积。在沉积认识的基础上,结合多种地层对比方法,对勘探新区进行科学、合理的地层对比。结果表明:水西沟群发育辫状河三角洲沉积的平原和前缘亚相,各亚相体对应于"组"的级别地层单元;厘定三工河组和八道湾组的地层界限为辫状河三角洲平原与辫状河三角洲前缘的相变界面;以上、下两套辫状河三角洲平原河漫沼泽微相稳定的煤层为区域对比标志层,准确控制目的层,并利用沉积旋回和岩性对比,进一步将各亚相体划分出相当于"段"的级别的地层单元。由此建立的沉积认识的地层对比格架,能够客观反映地层沉积的变化,为下一步地质研究打下基础。Analysis based on core observation, regional geological survey, drilling as well as logging data shows that braided river delta develops in Jishen-1 area, Turpan—Hami Basin in Jurassic Shuixigou Group. On the basis of sedimentary understanding, with a variety of stratigraphic correlation methods, stratigraphic correlation was conducted in this new exploration area. The result indicates that braided river delta plain and delta front develop in this area in Shuixigou Group and each subfacies corresponds to the stratigraphic unit of formation. The interface between braided river delta plain and delta front defined as the boundary for Sangonghe Formation and Badaowan Formation. and the two stable coal beds in braided river delta plain swamp microfacies are seen as the mark layer of regional stratigraphic correlation, which can control the purpose layers accurately, combined with sedimentary cycle sequence and lithology correlation, the subfacies are further classified to the stratigraphic units of member. Stratigraphic framework based on the above mentioned sedimentological interviewing was established, which could reflect sedimentary changes of strata objectively and help guide the further geological research.

关 键 词：吐鲁番—哈密盆地 吉深1地区 水西沟群 沉积相 地层对比 

分 类 号：P631.81[天文地球—地质矿产勘探]