石油 & 自然气
陆上勘探
A Prospectivity Map is defined as the final product of the integration of the data acquisition, processing and interpretation during the different stages of a project. The categorization and weighting are included, which are defined by the information obtained through different multispectral and hyperspectral interpretation techniques, structural maps, etc. A prospectivity scale of the different targets is made after the final weighting.
Due to the progress of the Geographic Information Systems during these last years, the development of prospection projects without a geolocated database became unthinkable. These Prospectivity Maps can be improved with information provided by the client, such as structural and isopach maps, seismic profiles or cubes, geochemical data, etc.
Those natural emanations of hydrocarbons can be identified through the processing and interpretation of radar and hyperspectral images. These types of images allow the differentiation and definition of the localization and the size of the surficial manifestation of hydrocarbons in a certain exploratory block.
The migration of light hydrocarbons to the surface generates a great variety of changes in the environment, which results in the establishment of anaerobic and reducing conditions, together with changes in the pH of the soil. These factors affect the growth and the state of the vegetation, which can be detected through multispectral and hyperspectral images, and then turned into a map of vegetation spectral anomalies.
The remote detection of minerals and groups of minerals is a highly useful tool in the hydrocarbons exploration. A mineral spectral anomalies map is based on the power of mineralogical discrimination that multispectral and hyperspectral images possess. These maps represent surficial alteration areas that can be caused by hydrocarbon migration.
A lineament is a straight or curvilinear structural feature of a terrain. It may also present linear or discontinuous schemes. These lineaments are useful for the definition of regional and subcontinental fractures patterns, and thus reveal the forces that have been acting over large cortical masses throughout the time.
With the implementation of remote sensing techniques, it is feasible to describe, categorize and determine the nature, origin and development of the forms of the current relief, as well as the relationship with the underlying structures. Moreover, it is possible to learn about the geological history registered in the surficial structures
This map registers the population density indirectly. For instance, the population of a region can be estimated through the count of the houses, inferring the amount of persons that compose a typical family according to a rural or urban area. There are specific methods for highly urbanized areas that are used for the big cities.