低幅度构造—岩性油气藏识别技术  

Recognition of low relief structure-lithologic reservoir

作　　者：白晓寅[1] 黄玉[1] 陈永波[1] 郭娟娟[1] 谭开俊[1] 许多年[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020

出　　处：《石油地球物理勘探》2012年第2期291-297,184,共7页Oil Geophysical Prospecting

基　　金：国家973项目"非均质油气藏地球物理探测基础研究"(2007CB209604)资助

摘　　要：准噶尔盆地陆梁油田东部的陆10—陆6井区勘探程度较低,地表条件复杂,油气藏为低幅度构造—岩性复合油气藏,地层等时追踪困难,低幅度构造圈闭的落实难度大,小断裂发育,储层受煤层影响严重且非均质性强。为此,文中采用了四项有针对性的关键技术,即基于二维谱的井震沉积旋回联合标定技术解决地层等时追踪问题,多尺度断裂自动检测技术识别小断裂,基于倾角测井约束的变速成图技术解决低幅度构造识别问题,子波分解与分频反演技术去除煤层强反射干扰和非均质薄储层预测。最终发现低幅度构造和岩性圈闭8个,叠合总面积达281km2,综合评价优选上钻两口井位。经设计井实钻分析,证明了上述技术的有效性和实用性。In Junggar Basin,identification of small lithologic reservoirs,such as well Lu 10 to Lu 6 controlled by low relief structure,is a real challenge.The main problems are low relief,small faults,and difficult horizon tracking due to little well information.At the same time,heterogeneity makes reservoir identification more difficult.To solve these problems,we apply series of methods,such as joint calibration by well-log cycles and two-dimensional spectrum for horizon tracking,multi-scale fracture automatic detection for small fault identification,variable velocity mapping constraint by dip logging for low relief structure recognition,and wavelet decomposition and frequency inversion for reservoir prediction.Eventually 8 traps of low relief structure are found with a total area of 281km2.Our solution is proven effective and practical by recent well drilling.

关 键 词：低幅度构造 构造—岩性复合油气藏 谱分解 相干技术 变速成图 子波分解 分频反演 

分 类 号：P631[天文地球—地质矿产勘探]