What kinds of exploration methods does the exploration team use when doing oil exploration?

As one of the most abundant fossil energy sources on earth, petroleum plays an irreplaceable role in our daily life. Today, Shandong Yikuang Drilling Technology Co.,Ltd. will introduce oil exploration methods.

Mining methods are also very different from coal due to its deeper burial. So, how should we locate where there is oil? China has a vast territory. Faced with such a vast unknown area, cost-saving and time-saving discoveries, the common desire of every oil company-geophysical exploration methods can achieve this goal. The main prospecting methods are gravity prospecting, magnetic prospecting and seismic prospecting.

1. Magnetic detector.

The earth is a huge magnetic field, and in most areas without mineral resources, the magnetic field will not change significantly. Where minerals appear, the magnetic field will be disturbed, resulting in magnetic anomaly areas, so magnetic anomalies can reflect the enrichment of minerals to a certain extent.

Magnetic surveys are usually done on a helicopter, and the crew needs to set up magnetometers in the work area and fly in a reticulated path. The mesh interval only needs to be adjusted according to the budget and the characteristics of the survey area itself. Currently, magnetometric measurements can be done on satellites. In drawn magnetometry maps, faults can be reflected by sudden changes in the direction of isolines on the map, and sometimes magnetic maps can also be used to distinguish basin bases (igneous or metamorphic rocks).

2. Gravity exploration.

The basic principles of gravity prospecting and magnetic prospecting can be compared. They both look for anomalous areas, but one relies on magnetic anomalies and the other relies on gravitational anomalies. In gravity prospecting, terrain and latitude interfere with gravity. We need to correct the gravity results to select gravity anomaly regions.

Gravity prospecting and magnetic prospecting are only the basis of early exploration, and the cost is very low, but they are not accurate by themselves. Its main purpose is to define the distribution of sedimentary basins and their internal structures, which is important for demonstrating the large-scale sedimentary construction of sedimentary basins. If the two are combined with each other, it will help the positioning of mineral resources. In addition, the disadvantage of gravity and magnetic measurements is also obvious, because small-level geological changes cannot be distinguished well. For example, it is basically impossible to distinguish between small-scale, high-density and low-density minerals.

3. Seismic exploration.

Compared with the former two, the seismic exploration scope is smaller and finer. Therefore, earthquakes play the most important role in geophysical exploration. Seismic exploration is to obtain seismic wave signals to reflect underground information by manufacturing artificial earthquakes. While seismic exploration is a far cry from earthquakes in natural disasters, it also requires the use of small seismic sources to stimulate small earthquakes. It costs more than the magnetic method and needs to be done by the exploration team. Before exploration, the exploration team needs to lay out seismic lines, including seismic sources and many receivers to stimulate and receive seismic signals. Thereafter, the seismic signal is propagated underground through the seismic source. Here it is necessary to introduce how the receiver receives the seismic signal. According to the principle of physics, we know that when a wave encounters a medium change, reflection and refraction will occur. Similarly, strata of different periods underground can also be regarded as different media, and reflection signals can occur on the contact interface of two strata, and receive signals through seismic receivers. Therefore, we know that when a wave encounters a change in the medium, there will be reflections and reflected signals.

Gravity, magnetic and seismic techniques are currently the most widely used early exploration techniques, which can respond more comprehensively to stratigraphic information. Especially in seismic exploration, its development has produced more and more measurement methods. With the development of information technology, seismic signal processing technology will become more and more advanced, and the resolution will be higher and higher, which can reflect more detailed underground conditions. Provides very useful assistance to geologists looking for oil.

The above are the exploration methods summarized for you when the exploration team does oil exploration. I hope it will be helpful to you. If you have any questions, please feel free to contact us. Shandong Yikuang Drilling Technology Co., Ltd. is a large-scale company in Shandong Province Its leading products are: water well drilling rigs, environmental sampling drilling rigs, core drilling rigs, pneumatic water well drilling rigs, geological exploration drilling rigs, drill pipes, drill bits and accessories. The company has been committed to the professional production of water well drilling rigs and down-the-hole drilling rigs, and the sales and maintenance of drilling tools and air compressors for more than 20 years.

We welcome customers from all over the world to visit our factory for guidance. Follow the official website of Shandong Yikuang Drilling Technology Co., Ltd., and take you to learn more about oil exploration.