塔里木盆地群苦恰克地区泥盆系东河塘组下段储层特征及控制因素  

CHARACTERISTIC AND CONTROL FACTOR OF THE LOWER DONGHETANG GROUP RESERVOIR OF THE DEVONIAN IN QUNKUQIAKE AREA , THE TARIM BASIN

作　　者：张惠良[1] 张荣虎[1] 李勇[2] 王月华[2] 朱国华[1] 李玉文[1] 沈扬[1] 张春莲[2] 

机构地区：[1]中国石油勘探开发研究院杭州地质研究所,浙江杭州310023 [2]中国石油塔里木油田分公司,新疆库尔勒841000

出　　处：《新疆地质》2006年第4期412-417,I0016,共7页Xinjiang Geology

摘　　要：从储层的微观特征入手,通过对岩石的铸体薄片、扫描电镜、物性等资料分析，结合区域地质特征研究认为：群苦恰克地区东河塘组下段为一套临滨-前滨相砂岩，以细粒石英砂岩、极细．细粒岩屑石英砂岩为主，结构成熟度及成分成熟度高，储集空间组合以残余原生粒间孔＋粒内溶蚀孔为主．储层孔隙度一般为4％-14％,平均7．92％，渗透率一般小于0．110^3-1．0×10^-3 μm^2，平均为2．41×10^-3 μm^2，总体属于Ⅳ-Ⅲ类储层，但在局部井区（群6、群4）存在相对优质的Ⅱ类储层．成岩压实、胶结作用是储层物性的主控因素，压实减孔一般19％-25％，平均达22．3％．胶结减孔量达3％-6％，致密胶结段可达9％-13％．相对优质储层的发育是多种地质因素共同影响作用的结果，其中刚性石英碎屑颗粒（70％-94％）的抗压实作用是基础．早期烃类流体注入及中弱程度的胶结作用是重要因素，粘土矿物薄膜的发育是关键．Commencing from microcosmic characteristic of the reservoir, according to cast liquid photo, scan electron microscope, quality etc., combining the geology characteristic in the district, the research thinks that the reservoir rock of the lower Donghetang group of the Devonian in Qiongkuqiake area is deposited in a shore face-foreshore ,which is chiefly fine quartz sandstone, very fine-fine the lithic quartz sandstone with high configuration and component maturity degree, and that the pore is most primary porosity retained and corrosion porosity of grain. The reservoir belongs to the Ⅳ-Ⅲ,whose porosity is most of 4- 14%（mean of 7.92%） and permeability is most of 〈0.1-10×10^-3μm^2（mean of 2.41 × 10^-3 μm^2）, but exists Ⅱ of the comparative good-quality in the partial well area（qun 6,qun4）. Compaction, cementation are the main control factors of the reservoir. The porosity has reduced 19-25% （mean of 22.3%） by compaction, and 3-6% （9-13% in compact reservoir ） by cementation. The comparative good-quality develops with the collective influence and mutual effect of various geological factors, and the anti-compaction of the rigid quartz grain （70-94%） is a foundation, the hydrocarbon fluid infusion in early days and cementation with medium-weak degree are important factors, growth of clay mineral membrane is a key.

关 键 词：塔里木盆地 群苦恰克 泥盆系 东河塘组 储层 控制因素 

分 类 号：P618.13[天文地球—矿床学]