地质统计学反演在四川盆地L地区储层预测中的应用
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摘要
地质统计学反演基于地质统计学方法,综合利用地震、测井数据和地质认识,对储层的空间分布特征进行模拟,预测储层分布规律。通过四川盆地L地区气田开发实践,总结出以地质统计学反演为核心,且适用于四川盆地须家河组非均质构造～岩性复合式气藏的反演路线,在叠后约束稀疏脉冲确定性反演的基础上,由阻抗数据作为约束条件进行储层参数随机模拟,进而进行有利储层预测。结果表明,该方法具有测井数据的垂向分辨率高和地震数据的横向分辨率高的优势,对于识别非均质砂泥岩薄互型储层效果较好。
The technique of geostatistical inversion for reservoir prediction is based on geostatistics,and it combines seismic,geologic and logging data to simulate spatial distribution of reservoirs and predict the distribution of reservoirs.Through the gas field development of L area in Sichuan Basin,the paper generalizes a inversion route which is based on geostatistics inversion and is suitable for heterogeneous structural-lithological composite gas reservoir of Xujia river in Sichuan basin.It is based on the post-stack restrict sparse pulse deterministic inversion and proceed stochastic simulation of reservoir parameters which takes wave impedance data as the restriction condition and then predict beneficial reservoirs.The result shows that this method have the advantage of both high vertical resolution based on logging data and high horizontal resolution based on seismic data and is very helpful for identifying heterogeneous thin inter-bedded sand and shale reservoir.
The technique of geostatistical inversion for reservoir prediction is based on geostatistics,and it combines seismic,geologic and logging data to simulate spatial distribution of reservoirs and predict the distribution of reservoirs.Through the gas field development of L area in Sichuan Basin,the paper generalizes a inversion route which is based on geostatistics inversion and is suitable for heterogeneous structural-lithological composite gas reservoir of Xujia river in Sichuan basin.It is based on the post-stack restrict sparse pulse deterministic inversion and proceed stochastic simulation of reservoir parameters which takes wave impedance data as the restriction condition and then predict beneficial reservoirs.The result shows that this method have the advantage of both high vertical resolution based on logging data and high horizontal resolution based on seismic data and is very helpful for identifying heterogeneous thin inter-bedded sand and shale reservoir.
引文
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[2]DUBRULE O,THIBAUT M,LAMY P,et al.Haas,Geostatistical reservoir aracterization constrained by3d seismic data[J].Petroleum science,1998,(4):21.
[3]ROTHMAN D H.Geostatistical inversion of3D seismic data for thinsand delineation[J].Geophysics,1998,51(2):332.
[4]马中高.地质统计反演—一种用地震资料约束的随机油藏模拟序贯法[J].石油物探译丛,1995,2:17.
[5]朱仕军,孙建库,文中平,等.混合优化波阻抗反演方法研究[J].天然气工业,2006,26(7):46.
[6]杨振武,谢用良,唐建明.多井约束地震地层反演技术在川西致密砂岩气藏描述中的应用[J].物探化探计算技术,2000,22(1):45.
[7]谭荣彪,李瑞,李珂泂,等.井震约束反演在薄互层复杂构造地区的应用[J].物探化探计算技术,2008,30(1):24.
[8]李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1994.
[9]李庆忠.论地震约束反演的策略[J].石油地球物理勘探,1998,33(4):423.
[10]印兴耀,刘永社.储层建模中地质统计学整合地震数据的方法及研究进展[J].石油地球物理勘探,2002,37(4):423.
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