WF-T-1 Absolute Gravimeter (Hardware and Software Introduction)
(Cases)Absolute gravimeter field gravity station fixed point measurement - Xinjiang 、Absolute gravimeter field gravity station fixed point measurement-Xi'an
Product Applications - long-distance cross-medium, mineral exploration, oil and gas exploration, seismic measurement, geological surveying, navigation, signal deployment, inertial navigation
Service：Exploration of Oil and Natural Gas、Ore and petroleum exploration,Seismic Applications
Gravity exploration presupposes that there is a difference in density between the object of study and the surrounding rock.
It can be summarized in one sentence: by removing the influence of various factors unrelated to the object of study from the observed values, it is possible to obtain gravity anomalies generated solely by mineral or tectonic and other density inhomogeneities, and by interpreting the anomalies it is possible to achieve the purpose of prospecting for minerals and exploring for minerals.
Scope of application - It is mainly used to investigate the geological structure of oil and gas-bearing prospective areas, study deep tectonics and regional geological structure; and search for metal ores in conjunction with other physical exploration methods. In recent years, it has also been applied in urban engineering environment.
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•Functional Advantages：
Vacuum Drop Volume Technology Program：
1. Reduce measurement interference
2. Precision mechanical design to ensure repeatability for tens of thousands of times
3. Strictly select non-magnetic materials to eliminate the influence of magnetic field
Autonomous frequency-stabilized laser：
1.Patented light path design
2. Compact design, easy to transport
3. Continuous locking ensures continuous measurement
4. Shelf components, cost advantages
Autonomous ultra-low frequency vibration isolation:
1. Innovative use of geometric negative stiffness springs
2. Two-stage active vibration isolation, 40s ahead of performance
3. Smaller vertical dimensions for easy transportation
4. Prism without blocking, easy to adjust the light path
Interval Measurement Plate
1. Time interval measurement accuracy up to 20 ps
2. Shelf components, cost advantages
Principle Gravity anomaly caused by density of underground material
For example, the density of ore is higher than that of rock (g/cm3）
At present, gravity surveying is used for the exploration of various minerals such as oil and gas, gold, copper, iron, and non-ferrous metals.
The Work Tasks of Gravity Exploration in Mineral Prospecting
1. The task of gravity exploration is broadly divided into four stages.
2. A pre-survey is a large-scale, small-scale gravity survey carried out in an exploration gap area with the aim of obtaining information on the basic contours of the geotectonics in a relatively short period of time. (Filling information gaps)
3. A census is work carried out in an area of value for further work, with the aim of delineating regional geological formations and indicating mineralized zones with a high degree of certainty. (Indication of mineralized zones)
4. Detailed investigation is the study of the pattern and characteristics of the gravity field in the mineralized zone, suggesting the location and production of tectonic and/or ore bodies. (Discovery of target minerals)
5. Detailed testing is the detailed study of known ore bodies, reservoir gas formations and other targets to determine their production, size and other elements. (Study of known ore bodies)
Gravity exploration needs to be refined repeatedly at multiple working scales, making the work burdensome.
The working scale of gravity prospecting should generally be adapted to the task at hand and also take into account the characteristics of the gravity anomalies generated by the object of exploration. The larger the scale, the more measurement points there are per unit area, and the more detailed the study of gravity anomalies will be.
Relative gravimeter mode of operation requires round trip observations, absolute gravimeter does not require round trip
