叠前贝叶斯同步反演技术在B区储层含气性预测中的应用  

APPLICATION OF PRE-STACK BAYESIAN INVERSION IN REGION B TO PREDICT THE GAS RESERVOIR

作　　者：贾学成 王红梅 杨建房 彭勃 张大伟 JIA Xue-cheng;Wang hong-mei;YANG Jian-fang

机构地区：[1]东方地球物理公司研究院,河北保定072750

出　　处：《新疆石油天然气》2018年第3期1-6,97,共7页Xinjiang Oil & Gas

摘　　要：研究区目的层段砂泥岩叠置难以区分,且储层横向变化快,利用常规叠后纵波阻抗反演技术已无法预测该区有利储层的分布范围。通过对已钻井气层的岩石物理分析,研究了弹性参数与岩性、物性及含油气性的关系。优选Vp/Vs作为有利储层识别的敏感参数,并开展叠前贝叶斯同步反演,并对得到的反演数据体进行交会解释,较好的预测了M层砂体的分布范围和含油气性,为气田增储上产提供了有利依据。It is difficult to predict the distribution range of the favorable reservoir by use the CSSI inversion because the impedance of sandstone and mud-stone is in the same range,and the lateral change of the reservoir is fast in the study area.Firstly,the relationship between the elastic parameters and lithology,physical properties and oil-bearing gas properties are studied by the rock physical analysis of the drilled gas reservoir.Then Vp/Vs is selected as the sensitive parameter for the identification of favorable reservoirs.For the region to carry out prestack bayesian inversion,the distribution scope of sand body and gas sand in M layer is predicted through the cross analysis of inversion results.It also provides a good basis for gas increase in oil reserve and production.

关 键 词：叠前贝叶斯同步反演 储层预测 岩石物理分析 含气砂岩 

分 类 号：P631[天文地球—地质矿产勘探]