W地区珠海组岩石物理特征及应用研究  

STUDY AND APPLICATION OF ROCK PHYSICAL PROPERTIES THE ZHUHAI FORMATION IN W DISTRICT

作　　者：朱江梅[1,2] 方中于[1,2] 李勇[1] 黄丽娜[2] 李佳胜[1] 

机构地区：[1]成都理工大学地球物理学院,四川成都610059 [2]中海油能源发展股份有限公司钻采院地球物理研究所,广东湛江524027

出　　处：《矿物岩石》2014年第2期113-120,共8页Mineralogy and Petrology

基　　金：中海油能源发展科技项目"海上多方位角地震资料处理方法研究"(项目号:HFKJ-CJK1107)

摘　　要：岩石物理学是研究岩石所表现出的各种不同物理性质及其相互关系和变化规律。在W盆地珠海组岩石物性研究中,采用参数交汇法,利用四口井(W9-3-1、W9-1-1、W9-1-2和W9-6-1)所测定的纵横波速度、密度、Vp/Vs、λρ和μρ等参数进行多井交汇处理,形成了表征珠海组地质特征的敏感参数:相对高的横波速度、低密度、低λρ高μρ,建立起识别珠海组有利岩性和有利储层的岩石物性参数模式。珠海组岩性预测是由砂泥岩区分、岩性边界及在井控下地震反演属性体的地震岩性预测组成。在珠海组岩性预测中,密度与λρ交汇和Vp/Vs与λρ交汇分别最有效地区分出珠海组二段和三段的砂岩泥岩及圈定出岩性边界,并建立测井岩性与地震岩性之间的映射关系,提高了地震岩性预测的可靠性。珠海组储层预测是由有利储层与非储层的区分、储层边界的圈定及井控下地震反演属性体的地震储层预测组成。在珠海组储预测中,密度与λρ和Vp/Vs与λρ交汇分别最有地将地珠海组二段和三段最有利储层和非储区分开来及圈定出储层边界,并建立测井储层与地震储层之间的映射关系,实现了测井储层"标定"地震储层。利用岩石物性参数建立有利岩性和有利储层的识别模式,定量解释了地震反演结果,精细刻画了储层,提高了预测效果,并扩展了岩性物性参数的应用,促进了岩石物性研究的发展。Rock physical property of rock density,P-velocity,S-velocity, velocity ratio,λρ and μρ from 4 drilling wells of Zhuhai Formation in the W Basin are studied. It reveals that the S-velocity and /xp are high, while density and μρ are low. These features of parameters can be useful in recognizing potential lithological characters and potential reservoir. The lithological prediction for Zhuhal Formation includes sand and shale discrimination,lithologic boundary demarcation and seismic lithologic predication of seismic inversion attribute volume. The cross plot of density and λρ successfully distinguished sand rock out off mud rock, draw lithologic boundary in the second and third section of Zhuhai Formation, and mapped relationships between logging lithologic feature and seismic lithologic feature. Thus dependability of seismic lithologicaI predication can be enhanced. The reservoir prediction for Zhuhai Formation consists of the determination between potential reservoir and non-reservoir, the reservoir boundary demarcation and seismic lithologic predication of seismic inversion attribute volume. In the reservoir predication, the cross plot of density and λρ had successfully distinguished potential reservoir out off non-reservoir,draw reservoir boundary in the second and third section of Zhuhai Formation, and mapped relationships between well logging reservoir feature and seismic reservoir feature. Thus, logging reservoir can successfully calibrate the seismic reservoir. The recognition pattern for potential rock and reservoir on the basis of rock physical properties, has thrown lights on seismic inversion interpretation quantitatively, and improved accuracy for reservoir description and predication. Also, it broadens the application of lithological physical parameters, and advanced developments of rock physical property research.

关 键 词：珠海组 岩石物性参数 交汇法 储层 岩性 

分 类 号：P584[天文地球—岩石学]