塔中北斜坡鹰山组碳酸盐岩沉积微相特征与演化  

Microfacies Characteristics and Depositional Evolution of the Lower Ordovician Yingshan Formation in North Slope of Tazhong Area,Tarim Basin

作　　者：任凭[1] 林畅松[1,2] 韩剑发[3] 李浩[1] 刘景彦[2] 王清龙[2] 

机构地区：[1]中国地质大学(北京)海洋学院,北京100083 [2]中国地质大学(北京)能源学院,北京100083 [3]塔里木油田公司勘探开发研究院,新疆库尔勒841000

出　　处：《天然气地球科学》2015年第2期241-251,共11页Natural Gas Geoscience

基　　金：国家重点基础研究发展计划"973"项目"中国西部叠合盆地深部有效碳酸盐岩储层形成机制与分布预测"(编号:2011CB201103);国家油气重大专项"塔中碳酸盐岩凝析气藏高效开发技术"(编号:2011ZX05049)联合资助

摘　　要：碳酸盐岩沉积微相不仅揭示了水动力特征及其沉积环境,也是后期储层发育的物质基础,在油气勘探中具有重要意义。通过大量薄片及岩心资料划分出塔中北斜坡鹰山组Mf1—Mf10 10种沉积微相类型,及MA1—MA4 4种沉积微相序列,其在平面上沿塔中一号断裂带呈条带状展布,靠近台地边缘附近多发育高能—中高能滩型微相序列(MA1—MA2),而台地内部能量相对下降,主要发育中低能潮坪型微相序列(MA3)低能白云质潮坪型微相序列(MA4);从鹰二段至鹰一段沉积时期,由相对低能沉积微相序列(MA3—MA4)向高能沉积微相序列(MA1—MA2)发生转化,鹰一段沉积晚期是滩体形成的主要时期,沉积环境水体能量向上逐渐增强。鹰山组顶部高能沉积微相发育多种孔隙类型,且易于发育构造裂缝并接受岩溶作用改造,是有利储层发育的物质基础。The depositional microfacies of carbonate illustrate the feature of the depositional water energy and envi- ronment. Additionally,microfacies are the fundamental of pore space development and facilitate the formation of fa- vorable reservoirs. Ten depositional microfacies （Mfl-Mfl0） and four microfacies patterns （MA1-MA4） are recog- nized in Yingshan Formation, the northern slope of central Tarim Basin, through a large number of thin-sections and cores. The microfacies patterns are distributed horizontally along with the Tazhong No. 1 fault zone. High-ener- gy to medium-to-high-energy depositional patterns developed beside the boundary of platform （i. e. MA1 and MA2）. However,the microfacies patterns in the inner platform indicate the decrease of water-energy to the central basin. Two microfacies patterns, including medium-to-low-energy tidal flat （MA3） and low-energy-dolomitic tidal flat （MA4）,have been suggested in the inner platform. Medium-to-low-energy microfacies patterns transform to medium-to-high-energy microfacies patterns from Yingshan 2nd to Yingshan 1st. During the late stage of Yingshan l st,which is the main stage for forming carbonate shoals, the depositional water energy gradually increased from the bottom to the top. The high energy microfacies which were on the top of Yingshan Formation,were the primi- tive material for favorable reservoir,because they formed several types of pores,and developed structural fractures and karstification more easily.

关 键 词：塔里木盆地 鹰山组 沉积微相 微相序列 

分 类 号：TE122.221[石油与天然气工程—油气勘探]