In:
Journal of Innovation and Social Science Research, Century Science Publishing Co, Vol. 8, No. 8 ( 2021-08-30), p. 49-51
Abstract:
As exploration progresses, complex block formations and mid-deep formations have become the main target areas in Bohai oil fields. In this context, well leaks and well wall instability due to special lithology are becoming more and more likely to occur, and have become the most common complications affecting the safety of drilling operations and production timing in the Bohai Sea. Geological risk prediction can give engineering hints at the design stage, so that the engineering is in a position to prepare for the risks, but because the risk prediction given on conventional seismic profiles is relatively rough, the practical application deviates greatly and cannot be closely integrated with the actual operation. In this paper, we analyze the data of leaking wells in the Bohai exploration wells, summarize the leaking well tectonic background and stratigraphy, and divide the leak-prone tectonic zone. By extracting suitable seismic attributes such as variance and waveform, fine prediction of weak (fractured) well sections is realized, and a set of fine identification techniques is formed to "avoid", "prevent" and "plug" well leaks. "avoid", "prevent" and "plug" well leakage. This technology has been applied in several exploration wells in the Bohai Sea, and it has played a good effect and is of great significance to promote.
Type of Medium:
Online Resource
ISSN:
2591-6890
DOI:
10.53469/jissr.2021.08(08).12
Language:
Unknown
Publisher:
Century Science Publishing Co
Publication Date:
2021
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