塔里木盆地轮南油田2、3井区三叠系沉积微相研究  

Triassic sedimentary microfacies in the second and third well fields in the Lunnan Oil Field,Tarim Basin

作　　者：汪忠德[1] 王新海[1] 王锦芳[2] 何幼斌[1] 胡治华[1] 方海飞[1] 刘洪[1] 

机构地区：[1]长江大学地球科学学院油气资源与勘探技术教育部重点实验室,湖北荆州434023 [2]中国石油勘探开发研究院,北京100083

出　　处：《沉积与特提斯地质》2008年第3期66-74,共9页Sedimentary Geology and Tethyan Geology

基　　金：中国石油天然气股份有限公司科技风险创新研究项目"河道砂体形成及分布的物理模拟与数值模拟研究"(07-06D-01-04-02-05)

摘　　要：三叠系作为塔里木盆地的主要含油气层系已逐渐被近几年来的油气勘探实践所证实。本文采取综合研究的技术思路和方法,通过取心分析、测井划相,结合开发动态资料,精细刻划各单油砂体在平面及空间上的微相展布。研究表明轮南油田三叠系砂岩,以含砾中粗粒砂岩为主,粒度较粗,重力流沉积特征较突出,以河湖相为主的碎屑岩沉积,其烃源岩主要发育于深湖-半深湖、浅湖和三角洲亚相,从大的韵律到小的层理都显示粒序递变的构造特征,为重力流悬浮搬运沉积的主要标志,存在辫状分支河道微相砂体,分支河道侧缘微相砂体和分支间湾微相砂体三种类型。中上三叠统粗碎屑岩,以及泥岩、粉砂岩,是以半深湖、浅湖至滨岸相环境为主的沉积,自下而上沉积环境分别发育有扇三角洲平原亚相、扇三角洲前缘亚相和前扇三角洲亚相。The Triassic strata occur as the main oil reservoirs in the Tarim Basin. The planar and spatial distribution of sedimentary microfacies in individual oil reservoirs of reservoir sandstones is explored on the basis of the analysis of cores and well logs, in combination with the petroleum exploration in recent years. The Triassic sandstones in the Lunnan Oil Field are composed of gravelly medium- to coarse-grained sandstones with coarser grain sizes, indicating typical gravity flow deposits, and fluvial- and lacustrine-dominated clastic deposits. The source rocks are developed in the deep lake and bathyal lake, shallow lake and delta subfacies, and typical of the gravity flow deposits by suspension transport. Three types of sandstones have been recognized, including braided distributary channel microfacies, distributary channel flank microfacies and interdistributary way mierofacies sandstones. The Middle and Upper Triassic coarse-grained clastic rocks, mudstone and sihstone are assigned to the bathyal lake, shallow lake and littoral deposits in the fan-delta plain, fan-delta front and prodelta subfacies from the base upwards.

关 键 词：塔里木盆地 轮南2 3井区 三叠系 沉积微相 

分 类 号：TE121.3[石油与天然气工程—油气勘探]