塔中隆起顺西地区良里塔格组沉积相类型及其展布特征  

Sedimentary Facies and Distribution Characteristics of Lianglitage Formation in Shunxi Area of Tazhong Uplift

作　　者：何君毅[1,2] 蔡忠贤[1,2] 张恒[1,2] 曹自成 沙旭光 He Junyi;Cai Zhongxian;Zhang Heng;Cao Zicheng;Sha Xuguang(a. Faculty of Earth Resourcesl 1b. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences（Wuhan）, Wuhan 430074, China;Northwest Oilfield Company, SINOPEC, Urumqi 830011, China)

机构地区：[1]中国地质大学(武汉)资源学院,武汉430074 [2]中国地质大学(武汉)构造与油气资源教育部重点实验室,武汉430074 [3]中国石油化工股份有限公司西北油田分公司,乌鲁木齐830011

出　　处：《地质科技情报》2018年第2期24-34,共11页Geological Science and Technology Information

基　　金：国家重点基础研究"973"发展计划(2012CB214804);中国科学院战略先导专项(A类)(XDZ/4010302)

摘　　要：良里塔格组作为塔里木盆地塔中地区重要的含油气层引起广泛关注,沉积微相揭示了水动力特征及其沉积环境,高能相带是后期储层发育的重要物质基础,沉积微相的展布在油气勘探中具有重要意义,但顺西地区良里塔格组沉积微相的研究依然薄弱。基于大量的岩心、薄片以及钻井、三维地震资料,结合地震属性提取技术以及古地貌恢复技术,总结了研究区发育的主要岩相类型和主要沉积微相类型,建立了良里塔格组沉积相模式,对良里塔格组沉积相展布作出了全面的总结。研究结果表明:(1)顺西地区良里塔格组识别出10种岩相:亮晶砂屑灰岩、亮晶鲕粒灰岩、亮晶鲕粒球粒灰岩、亮晶生屑砂屑灰岩、生物格架灰岩、含生屑藻粘结灰岩、泥质藻粘结灰岩、生屑泥晶灰岩、砂屑泥晶灰岩和泥晶灰岩;(2)顺西地区良里塔格组划分出台内颗粒滩、台内生物丘、灰泥丘、滩间海和台内洼地5种沉积亚相;(3)基于古地貌的恢复和地层厚度的研究,证实顺西地区良里塔格组属于碳酸盐岩缓坡沉积类型,并将其缓坡类型划分为内缓坡-中缓坡-外缓坡的沉积相模式。Lianglitage Formation, an important reservoir in Tazhong area of Tarim Basin, has attracted agreat many of attentions. Its sedimentary microfacies reveals the hydrodynamic characteristics and the sed- imentary environment and has important significance in petroleum exploration. High-energy facies is an important material basis for late stage of the reservoir development and the distribution of the sedimentary microfacies. However, the study of this formation and its sedimentary microfacies of Shunxi area is still in- adequate. Based on the analysis of large numbers of cores, thin sections,drilling and 3D seismic data, com- bined with the seismic attribute extraction technique and the paleo-geomorphology restoration technique, this paper summarizes the main facies types and main sedi-mentary microfacies of this study area and builds up a model for Lianglitage Formation sedimentary facies as well as a comprehensive summary of the sedi- mentary facies of the Formation. The results show that Lianglitag Formation in Shunxi area is categorized into 10 lithofacies： sparite psammitic limestone, sparry oolitic limestone, sparry oolitic limestone chon- drules, sparry bioclastic calcarenite, biological framework rocks, containing bioclastic algal limestone, ar- gillaceous limestone, algal bioclastic micrite, micritic limestone and sand scraps micrite. Its sedimentary microfacies is divided into 5 types：particles in the beach and the intraplatform bioherm, mud mound, the sea between the beach and the intraplatform depression. The restoration of the ancient landform and the formation thickness confirms that the Lianglitage Formation in Shunxi area belongs to carbonate ramp sedi- mentary type. The gentle slope type is divided into the inner gentle slope, the middle gentle slope and the outer gentle slope.

关 键 词：良里塔格组 岩相 沉积微相 沉积相 塔中隆起顺西地区 

分 类 号：P512.2[天文地球—地质学]