川东杂卤石的地球物理响应特征及地震勘探技术

探讨杂卤石定量预测的技术方法流程.四川盆地三叠系是杂卤石矿的主要产出层段,但因埋藏深(1～4 km)、厚度薄(单层厚度1 m),勘探难度大.针对杂卤石的特征,从地震勘探角度出发,采用层拉平技术、“印模法”、地震多属性分析技术、井震协同反演技术相结合,进行各种地震勘探技术研究,总结出一套适用于杂卤石定量预测的技术方法流程.杂卤石的成因、运移以及与断层的关系复杂,通过采用高分辨率AFE技术对其进行叠后裂缝预测,认为川东地区杂卤石与裂缝有关.

Characteristics geophysical response of polyhalite and its seismic exploration technology in east Sichuan Basin,China

Triassic in Sichuan Basin is the main production formation of polyhalite,which generally has a buried depth of 1～4 km,and a single layer thickness of 1 m.This paper discusses the geophysical technical method of quantitative prediction of polyhalite.However,seismic characteristics of polyhalite in the basin are not well studied at present.So,the exploration of polyhalite in this area is extremely challenging.Various seismic exploration technologies,such as layer flattening technique,impression method,seismic attribute technology and seismic motion inversion technology,are studied in consideration of the particular physical properties of polyhalite.A technique process of polyhalite quantitative prediction is proposed in the paper so as to provide theoretical and technical support for Triassic polyhalite exploration and development in Sichuan Basin.Since the genesis and the migration of polyhalite has a complex relation with fault,high resolution AFE technique is used for the prediction of fractures.It proves that the polyhalite in the region is related to fractures.