测井约束随机优化地震反演预测百21井区薄层砂体  

Prediction of Thin Sandbodies in Bai-21 Well Area Using Logging Constrained Stochastic Optimization Seismic Inversion

作　　者：黄宣皓[1] 尚建林[2] 王林生[2] 刘林[2] 王晓萍[2] 刘谨铭[2] 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]中国石油新疆油田分公司百口泉采油厂,新疆克拉玛依834000

出　　处：《新疆石油地质》2013年第3期341-344,共4页Xinjiang Petroleum Geology

摘　　要：准噶尔盆地西北缘百口泉油田百21井区侏罗系八道湾组三段为曲流河沉积,其泥岩夹薄层砂体横向变化快,预测难度大。高分辨率测井约束随机优化地震反演技术利用了测井与地震数据的地质统计规律,采用随机优化理论实现对地震数据进行储集层波阻抗及其他物性的反演,无需复杂的建模过程,而且是通过解正问题来解反问题,因而使得约束比较容易实现。鉴于研究区砂泥岩波阻抗有部分区域重叠,而校正后的自然电位能很好地区分砂泥岩,因此应用该方法对目的层进行了波阻抗反演和自然电位反演,2次反演结合共同预测研究区内储集层分布情况,效果较好。Faking prediction of member-3 mudstone with thin layer sand of Jurassic Badaowan formation in Bai-21 well area in Baikouquan oilfield in northwestern margin of Junggar basin as an example, the application of high-resolution logging constrained stochastic optimiza- tion seismic inversion technology to such a reservoir prediction is discussed, and good results are analyzed, As a further development of con- ventional seismie inversion, this techno｜ogy takes advantage of the geostatistical law of the logging anti seismic data and realizes the inver- sion of wave impedance and other physical properties using stochastic optimization theol.~＇, without complex modeling process. At the same time, this technology answered inverse problem by solving positive questions, thus making the constraint be relatively easy to achieve. In view of the partial overlap of sand-shale wave impedance in the study area and the corrected self-potential property that ean do well in dis- linguishing the sandstone from mudstone, the wave impedance inversion and the self-potential inversion are all used for the target zone, in order to more properly predict the reservoir distribution in this area.

关 键 词：百口泉油田 百21井区 薄砂体 高分辨率 测井约束反演 储集层预测 

分 类 号：P631.445.4[天文地球—地质矿产勘探]