摘要
在塔中地区志留系柯坪塔格组地层、沉积认识的基础上,通过详尽的岩石学研究,描述了塔中地区志留系柯坪塔格组储层的特征;应用大量实验数据分析了影响储层物性的因素,并明确了其主控因素。塔中地区柯坪塔格组砂岩成分成熟度总体较低,但在下沥青砂岩段发育有高成熟度的石英砂岩;下沥青砂岩段储层物性整体好于上沥青砂岩段。塔中地区柯坪塔格组储层物性的主控因素是储层的沉积相类型,表征形式是储层的岩石学特征(碎屑组分和粒级等),较为优质的储层基本为中—细粒以上石英砂岩(或成分接近石英砂岩)。压实作用和成岩胶结作用是影响储层物性的重要因素。进一步研究塔中地区柯坪塔格组储层沉积相特征及展布,就可以找到储层发育、分布规律,从而确定志留系勘探的有利目标区。
For Silurian Kepingtage Formation in central Tarim Basin, the reservoir characteristics were summed up by detailed stratigraphic, sedimentary and petrographic studies; moreover, some factors affecting reservoir physical property were analyzed by asolot of experimental data; and the main controlling factors were alis always characterized by a lower maturity whereas quartz sand determined. Results show that:(1)sandstone in this formation stone with a high maturity is developed at the upper bituminous sandstone;(2)the reservoir physical properties in lower bituminous sandstone are better than those in upper bituminous sandstone;(3)the main controlling factor is sedimentary facies type which can be represented by both detrital component and size grade of reservoir;(4)high-quality reservoir is roughly composed of middle-to fine-grained quartz sandstone or quasi-quartz sandstone;(5)the important factors affecting reservoir physical properties are compaction and diagenetic cementation. In the next, both sedimentary-facies characteristics and distribution of Kepingtage Formation should be studied in order to find out some principles of reservoir development and distribution, and to further determine a favorable target of Silurian exploration.
出处
《天然气技术》
2009年第4期7-11,共5页
NATURAL GAS TECHNOLOGY
基金
国家"十五"科技攻关项目(编号:2004BA616A02-04-02)
关键词
塔里木盆地
志留系
储层
成岩作用
沉积相
Tarim Basin, Silurian, reservoir, diagenesis, sedimentary facies
作者简介
王勇（1970－）．女，工程师，从事测井解释邗储层评价工作E－mail：2174854@163.com.
