Geophysical research of wells: types and application

One of the main issues in hydrogeology is considered to geophysical research wells. This is an important process. Many companies currently solve this issue by standard methods of logging or exploration. However, in some cases they can use other modern technical means.

Types of process

For a long period of work on the wells survey experts have developed different ways of logging, including geophysical and radioactive. When deciding on the choice of a particular method of exploration, and it should provide the reliability, efficiency study and the understanding of the need and the feasibility of its implementation and maintaining its profitability. Therefore, making the geophysical study of wells, traditional methods of logging are nowadays used in conjunction with innovative. Their goal is to study the slit and is detected in a water-bearing intervals. This applies to wells without protecting the shaft, and enclosed by a metal or plastic.

There are various geophysical methods of wells research, but the main ones are:

• High frequency induction;
• Gamma logging;
• Electrical; and
• Videokarta;
• Method of potentials of spontaneous polarization.

The Most effective is gamma-ray logging. It allows to divide the layer on lithographic elements and allocate aquifer and clay intervals.Now quite often, well obseived plastic tubing. They protect the structure from deformation when moving rocks. This increases the need to use such geophysical research wells, which allows to study the electrical properties of rocks erected through the barrier. However, in this case unacceptable traditional methods of logging based on the use of conduction currents. The best option would be to use methods with high frequency induction. During the technical analysis of wells used videokarta and magnetic location. Can also be used a method such as caliper logging. When applying videokarta, carrying out geophysical exploration wells, mostly used by the color video camera of the latest development. It gives a higher resolution image of the side walls of the object being validated.

Recommended

Staff evaluation: system and methods

Personnel Assessment allows you to identify how competent the employees involved in the enterprise, and it is the performance of their work – the most significant factor affecting the efficiency of the company. To clarify the impact of performa...

How to start your own business: important aspects.

Many people, tired of working for someone else, are increasingly thinking about how to start your own business. Someone wants to open a salon, someone store, and someone enough and vegetable stalls. Before you throw in the pool with his head, it is i...

Business activities. its essence and basic functions

The Entrepreneurial activity of the citizen – is undertaken at your own risk and independent activity, which aims to systematically profit through the sale of works, goods, services, use of the property. The citizen engaged in such activities, ...

Tip

If the work is carried out in carbonate rock, characterized by the tendency to cracking, very important is the proper cementing of the well. This process should be approached with special attention. Control of cementation quality is achieved with the use of acoustic scanning. This method in this case is important. Due to acoustic scan revealed defects in the casing, which can compromise the integrity of the skin, and is determined by the technical condition of the profile and the wall of the column.

Summary

All these methods help to ensure the quality of field geophysical investigations of wells. They are the most effective in this process. When this is achieved, operational issues such as lithographic study (breaking up) of rocks through which the well, assessment of technical equipment of the well, capacity of the aquifer intervals and the filtration qualities of the rocks, and to determine the quality of produced water.