准噶尔盆地夏子街油田夏9井区三叠系沉积相类型与特征  

Sedimentary Facies Types and Depositional Characteristics of Triassic in the 9th Area of Xiazijie Oilfield

作　　者：曹少芳[1] 陈元勇[1] 余诚林[2] 肖明国[1] 曹少勇[3] 

机构地区：[1]长江大学地球科学学院,湖北荆州434023 [2]石油大学(华东),山东东营257061 [3]中石化中原油田,河南濮阳457321

出　　处：《内蒙古石油化工》2008年第1期138-140,共3页Inner Mongolia Petrochemical Industry

摘　　要：夏9井区三叠系油藏由于对及沉积体系、储层分布认识不清,注水开发效果差,采出程度很低。本文从现代沉积学理论出发,充分利用岩心、钻井、测井等资料,深入研究了夏9井区三叠系的沉积特征,从中识别出多种沉积相类型:冲积扇相、、湖泊相和扇三角洲相。其中扇三角洲相是三叠系主要沉积类型,扇三角洲相以其粗粒且分选差的岩性、紫红—灰—灰绿色的泥岩、兼具牵引流和重力流沉积,发育交错层理、平行层理及砾石叠瓦状排列为典型识别特征。论文从扇三角洲的分布、识别依据及其沉积微相特征等方面论述了夏9井区扇三角洲的特点,从而为下步老井挖潜及滚动开发指明了方向。Water flooding efficiency was poor and recovery factor was low in triassic oil reservoir of the 9th area cause sedimentary system and reservoir distribution were unclearly understood. Based on modern sedimentological theory ,the article researched the depositional characteristics of Triassic oil reservoir in the 9th area deeply and identified several sedimentary facies types ：alluvial fan facies, fan delta facies and lacustrine facies by fully applying the core,drilling and logging data, of which the fan delta facies is the most important facies of Triassic, the fan delta sedimentary assembled can be identified six microfacies： mudrockflow, braided channel, diffusion, debris flow, subaqueous distributary channel, subaqueous interdistributary channel microfacies. Fan delta facies can be identified distinctly by its coarse grain and poor sorting sediments and crimson-dark gray-gray green mudstone,deposit assemblage of gravity flow and traction current, developing cross bedding, parallel bedding and imbricate arrangement gravels. The article expounds Characteristics of Fan Delta sediments in the 9th Area of Xiazijie Oilfield from its distribution, recognition symbols and characteristics of microfacies and ect,so that it provides basis for progressive exploration developing and old producer reviewing.

关 键 词：扇三角洲 沉积特点 三叠系 夏子街油田 

分 类 号：P618.130.2[天文地球—矿床学] TE331[天文地球—地质学]