大北高陡构造地应力测井解释及致密砂岩储层有效性评价  

Explanation of Earth Stress Logging and Effectiveness Evaluation of Tight-Sand Reservoir in Dabei Area with Steep Structure

作　　者：范文同[1] 郑新华[1] 袁仕俊[1] 王华伟[1] 田隆梅[1] 赵新建[1] 

机构地区：[1]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《工程地球物理学报》2014年第1期66-70,共5页Chinese Journal of Engineering Geophysics

基　　金：国家科技重大专项(编号:2008ZX05020-005)资助

摘　　要：塔里木油田库车前陆盆地地层高陡、地层异常高温高压、地应力分布复杂,储层具有基质孔隙度低、孔隙结构复杂、裂缝发育等典型非常规致密砂岩特征。现有研究资料表明,该区地应力大小和方向与储层有效性关系密切。利用常规测井和声电成像测井资料,基于岩石力学实验,结合压裂、地层测试等实测数据,建立了适合于大北地区致密砂岩储层的地应力计算模型,并提取储层有效性评价指标,为工区从地应力角度评价低孔低渗裂缝性致密砂岩储层有效性提供了重要的判据。Kuqa foreland basin in Tarim oilfield has some typical abnormal tight--sand char- acteristics, such as the steep structure, abnormal high temperature and pressure, complex earth stress, low porosity, complex pore structure and micro fractures. The study before has revealed that the orientation and intensity of the earth stress have a close relationship with the effectiveness of reservoirs. Using normal, electric and acoustic imaging logging data, based on the rock mechanics experiments, combining fracture and test data, the stress model of tight--sand reservoirs in DaBei area is established and the effective evalua- tion index is obtained. Result of this study provides an efficient way to evaluate effectively fractured tight--sand reservoirs with low porosity and low permeability.

关 键 词：库车前陆盆地 测井地应力解释 裂缝性致密砂岩 储层有效性 

分 类 号：P631[天文地球—地质矿产勘探]