APPROBATION OF FREQUENCY-RESONANCE TECHNOLOGY FOR SATELLITE AND PHOTO IMAGES PROCESSING AT SITES OF EXPLORATION WELLS DRILLING IN CABORA BASSA BASIN (ZIMBABWE)

Abstract

The results of additional experimental studies at the site of the drilled exploratory well in the Cabora Bassa basin (Zimbabwe) in January and July-August 2023 are presented. The results of reconnaissance survey of a fragment of Zimbabwe territory with a license block and a photo of the drilling site carried out in 2022 allow us to state that the probability of fluid inflows (oil, condensate, gas) receiving in industrial volumes in two designed wells within the block is close to zero! At the end of 2022, drilling operations at the Mukuyu-1 well within the block were completed. However, samples of liquid hydrocarbons from the main and parallel boreholes for final confirmation of the oil and gas capacity of the structure were not obtained! And according to the results of the well logging and the fluorescent glow of the core, the drilled structure is considered promising for the oil and gas deposits discovery, and the drilling of the 2nd well was planned. During the additional survey by direct-prospecting methods of prospective depth intervals and the core, signals from the 10th group of sedimentary (siliceous) rocks and neon gas were recorded! Signals at oil, condensate and gas frequencies was not received! The properties of neon gas allow us to state that the fluorescent glow of the core from the well is due to the presence of neon gas in it, not hydrocarbons! The results of additional instrumental measurements confirm the conclusions made earlier about the absence of hydrocarbon accumulations in industrial volumes at the Mukuyu-1 well drilling site. The results of the additional experimental studies in July-August 2023 confirm the previous conclusions: the probability of oil and gas accumulations detecting in commercial volumes within the Company's licensed block is close to zero. In the eastern part of the block, instrumental measurements confirmed the presence of a kimberlite volcano with diamonds. When processing satellite images and photographs of the Company's block in a detailed mode, the position of kimberlite complexes can be localized and a place for drilling a well determined. When performing instrumental measurements using a helium sample, the responses from this gas were recorded with a delay at the Mukuyu-2 well site. Experiments with the use of seismic sections allow us to conclude that they are informative and appropriate for frequency-resonance processing when surveying large blocks and local areas within which seismic surveys were carried out. In order to identify the most promising areas (blocks) for detailed oil and gas exploration, a reconnaissance survey project of the entire Zimbabwe territory is proposed. For the practical implementation of such a project, a satellite image of Zimbabwe territory can be divided into 150 local blocks for processing. The research materials, as well as the results of previously conducted experimental work on drilling sites, indicate the feasibility of additional use of direct-prospecting methods at the stages of selecting sites for exploratory wells laying. Once again, it can be concluded that the additional use of direct-prospecting methods at the stages of selecting sites for wells laying makes it possible to identify the most optimal zones, as well as to assess the feasibility of planned wells drilling within the prospective structure.