库车坳陷依南-吐孜地区阿合组砂岩构造裂缝评价
Acta Scientiarum Naturalium Universitatis Pekinensis(2014)
Abstract
以测井资料为基础,计算构造裂缝孔隙度;然后根据构造裂缝发育会导致岩石强度降低的基本理论,定量描述岩石杨氏模量的变化对构造裂缝发育情况的影响,提出基于构造裂缝孔隙度和岩石杨氏模量两个参数所构建的“裂缝评价指标(f)”,并划分构造裂缝发育的级别,对库车坳陷依南-吐孜地区下侏罗统阿合组低孔低渗砂岩构造裂缝的发育程度进行评价.结果表明:在平面上,依南-吐孜地区下侏罗统阿合组砂岩构造裂缝在依南2井地区构造裂缝级别相对较高,构造裂缝较为发育;在垂向上,阿合组上部砂砾岩夹泥岩段构造裂缝的发育级别相对较高,构造裂缝较为发育.
MoreKey words
tectonic fractures,fracture evaluation indicator,low porosity and low permeability sandstone,Yinan-Tuzi area,Ahe formation
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