随钻电阻率成像测井在北部湾碳酸盐岩储层中的综合应用  

Integrated Solution of LWD Resistivity Image Logging in Carbonate Reservoir in Beibu Gulf,China

作　　者：杨世夺[1,2] 雷霄 蔡军 吴红霞 

机构地区：[1]中国地质大学能源学院,北京100083 [2]中海石油有限公司湛江分公司,广东湛江524057 [3]斯伦贝谢中国公司数据与咨询服务部门,北京100015

出　　处：《测井技术》2010年第2期177-182,共6页Well Logging Technology

摘　　要：涠洲6-1油田是位于南海北部湾海域的石炭系灰岩潜山油田。利用随钻电阻率成像测井(ADN和GVR)资料对该区2口水平开发井进行了综合解释评价。根据构造分析,确定了井旁构造为一走向北东-南西向断背斜。结合裂缝走向统计结果与区域构造,分析了裂缝发育史。应用双侧向定量计算出裂缝孔隙度。运用GVR的方向性电阻率数据,结合Vm(孔洞影响因数)研究了井眼周围孔隙分布,并用孔隙频谱分析原理对原生孔隙和次生溶孔进行了评价。通过GVR电阻率图像与随钻密度测井、中子测井资料相结合,提出了测井综合解决方案,更好地确定了该区的地层岩性、地质构造、岩石物理属性及岩石力学特征。Weizhou6-1 oilfield is carboniferous buried-hill carbonate reservoir, which is located in the Beibu Gulf of the South China Sea. In 2006, 2 horizontal development wells were drilled in this oilfield to enhance the oil production. They are logged and interpreted with adnVISION （ADN） and geoVISlON （GVR） logging while drilling tools. Based on the structural analysis, the NE-SW near borehole structure could be confirmed. Combining the fracture strike statistics and local structure, the fracture development principle is analyzed. In addition, the fracture porosity is calculated using the dual laterolog resistivity algorithm. Secondary porosity is computed from the GVR images by adapting a method originally developed for using with wireline images. A Vug Multiple Effect Factor （Vm） is introduced to generate a porosity map around the borehole u- sing the azimuthal resistivity data obtained from GVR. Using this porosity map, Porosity Spec- trum Analysis is used to provide a continuous output of the primary and secondary porosity com- ponents for the whole logging interval. With the combination of GVR resistivity images and den- sity neutron data, a fully integrated solution is performed to better define the lithology, geolog- ical structure, petrophysical properties and geomechanic analysis in this oilfield.

关 键 词：随钻电阻率成像测井 碳酸盐岩裂缝 次生溶孔 

分 类 号：P631.84[天文地球—地质矿产勘探]