利用地震资料判断断层封闭性的方法探讨
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摘要
在深入研究断层封闭性及其主要影响因素的基础上 ,根据对断裂带中岩性影响因素的分析 ,定量描述了断裂带填充物中泥质所占百分含量的大小与其断层位移和被错断泥岩厚度之间的函数关系 ,并提出了根据断裂带填充物中泥质含量的大小来判断断层封闭性的标准。因勘探程度较低地区断层位移和被错断泥岩厚度难以确定 ,所以 ,提出利用地震资料求取断层位移和被错断泥岩厚度 ,再利用断层填充物中泥质含量的大小判断断层封闭性的方法 ,并将其应用于松辽盆地黑鱼泡凹陷嫩一、二段内几条主要断层封闭性的研究中。结果表明 ,该方法不仅可以研究断层封闭性 ,而且还可以将断层封闭性研究扩展到整个平面上。
On the basis of deep research on fault sealing property and its main influence factors, the functional relation of mud content in fault infills with fault displacement and faulted mudstone thickness is described quantitatively through the analysis of lithology influence factors in fracture belt. And the standard of judging fault sealing property using mud content in fracture infills is also presented. As the fault displacement and faulted mudstone thickness are difficult to determine in low exploration degree areas, therefore we use seismic data to derive these values and then judging fault sealing preperty according to mud content in fault infills. This method has been applied to the study of sealing property of several major faults in the Heiyupao sag of Songliao Basin. The result shows that the method can be used to study the fault sealing property, and this kind of study can be extended to the whole area.
On the basis of deep research on fault sealing property and its main influence factors, the functional relation of mud content in fault infills with fault displacement and faulted mudstone thickness is described quantitatively through the analysis of lithology influence factors in fracture belt. And the standard of judging fault sealing property using mud content in fracture infills is also presented. As the fault displacement and faulted mudstone thickness are difficult to determine in low exploration degree areas, therefore we use seismic data to derive these values and then judging fault sealing preperty according to mud content in fault infills. This method has been applied to the study of sealing property of several major faults in the Heiyupao sag of Songliao Basin. The result shows that the method can be used to study the fault sealing property, and this kind of study can be extended to the whole area.
引文
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2 WeaberKJ ,DaubkoraE .PetroleumgeologyoftheNigerdelta .Proc 9thWorldPetrolCongress ,1975,2 6 4 3～ 2 6 53
3 DowneyMW .Evaluatingsealsforhydrocarbonaccumulations .AAPGBuletin ,1984 ,6 8(11) :1752～176 3
4 熊永旭 ,先容有 ,董秀芹 ,等 .破裂面的性质与油气渗滤关系探讨 .石油地质文集 (构造 3) ,北京 :地质出版社 ,1978,16 4～ 16 8
5 李德荣 ,杨书安 .试论不同力学性质的断裂构造的富水部位及富水性 .地质科学 ,1975,(3) :2 0 0～2 2 9
6 曹瑞成 ,陈章明 .早期勘探区断层封闭性评价方法 .石油学报 ,1992 ,13(1) :13～ 2 2
7 吕延防 ,陈章明 ,陈发荣 .非线性映射分析判断断层封闭性 .石油学报 ,1996 ,16 (2 ) :36～ 4 1
8 GibsonRG .Fault zonesealsinsiliciclasticstrataoftheColumbusBasin ,offshoreTrinidad .AAPGBul letin .1994 ,78(9) :1372～ 1385
9 刘泽容 ,张晋仁 .油藏评价和预测 .北京 :石油工业出版社 ,1993,5～ 15
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