Yongzhen Ji
Associate Researcher
SINOPEC Geophysics Research Institute
Dr. Ji is currently an associate researcher in SINOPEC Geophysics Research Institute (SGRI). He studied Geological Resources and Geological Engineering at China University of Petroleum, Beijing, and exchanged at the University of Tokyo during his doctoral program. After graduation, he has led 5 ministerial-level scientific research and innovation projects, won the SINOPEC Min Enze Award for Young Scientist Award and 3 ministerial-level prizes for his achievements. He specializes in complex reservoir prediction and fluid detection, and has assumed important roles in geophysics-engineering integration projects for unconventional resources recent years.
Participates in
TECHNICAL PROGRAMME | Primary Energy Supply
Opportunities for Oil & Gas Supply Growth - Shales, Oil Sands, New Basins Other Unconventionals
Forum 02 | Digital Poster Plaza 1
28
April
12:30
14:30
UTC+3
In SINOPEC operating plays, tight sandstone and shale reservoir are important successors for traditional hydrocarbon reservoir. These two types of unconventional reservoirs are characterized by large area, continuous distribution, Low resource endowment. Regardless the huge potential, a variety of challenges needs to be carefully reviewed during E&P strategic planning. For tight sandstone reservoir, it is apparently hard to predict sweetspot due to its inhomogenious nature which could impact its potential exploitation; the unique characteristics of shale gas make the high-precision geophysics-engineering sweetspot prediction especially important; at the same time, the natural production capacity of these two types of reservoirs is low, as a result, engineering modification is indispensable making the accuracy of microseismic-based modification monitoring needs further improvement in order to reduce costs and increase efficiency.
To address the exploration and development problems of tight sandstone reservoirs, innovative technologies such as reservoir parameter simulation based on multi-information fusion and prestack attenuation analysis were adopted to improve the prediction accuracy of gas-enriched reservoirs, and the coincidence rate was increased by 15%, resulting in an increase of over 20% of proved reserves.
In shale gas exploration, we have innovatively formed the geophysical sweetspot prediction technology series including simultaneous porosity-TOC inversion, multi-information fusion gas content identification and broadband impedance based high-quality shale thickness prediction; and the engineering sweetspot prediction technology series including prestack azimuthal anisotropy inversion, pressure prediction based on CPS model and RT method, and the coefficient of stress difference prediction. Innovative and optimized shale gas geophysics-engineering sweetspot prediction technologies increased the shale gas reservoir prediction coincidence rate by 10%.
For engineering modification monitoring, microseismic monitoring related technologies were studied. We formed a new acquisition method based on hybrid observation system for fracturing microseismic signals in deep and complex media and a weak signal enhancement processing method, realized effective monitoring of microseismic signals at depths of over 4,000 meters, and increased microseismic event detection capability by 20%. We constructed an intelligent processing flow of fracturing realizing unsupervised automatic monitoring and effectively enhanced the efficiency and automation of monitoring. The developed multidimensional and multidisciplinary integrated interpretation technology of fracturing provides a basis for estimating effectiveness of fracturing and fracturing schemes optimization.
The innovative technology and geophysics-engineering integration strategy is of great significance to improve the accuracy of tight sandstone and shale gas reservoir description and benefits the engineering modification. This abstract will share the practices of above effective and advanced mentioned technologies through the latest E&P application cases of tight sandstone and shale gas reservoir in typical basins in western China.
To address the exploration and development problems of tight sandstone reservoirs, innovative technologies such as reservoir parameter simulation based on multi-information fusion and prestack attenuation analysis were adopted to improve the prediction accuracy of gas-enriched reservoirs, and the coincidence rate was increased by 15%, resulting in an increase of over 20% of proved reserves.
In shale gas exploration, we have innovatively formed the geophysical sweetspot prediction technology series including simultaneous porosity-TOC inversion, multi-information fusion gas content identification and broadband impedance based high-quality shale thickness prediction; and the engineering sweetspot prediction technology series including prestack azimuthal anisotropy inversion, pressure prediction based on CPS model and RT method, and the coefficient of stress difference prediction. Innovative and optimized shale gas geophysics-engineering sweetspot prediction technologies increased the shale gas reservoir prediction coincidence rate by 10%.
For engineering modification monitoring, microseismic monitoring related technologies were studied. We formed a new acquisition method based on hybrid observation system for fracturing microseismic signals in deep and complex media and a weak signal enhancement processing method, realized effective monitoring of microseismic signals at depths of over 4,000 meters, and increased microseismic event detection capability by 20%. We constructed an intelligent processing flow of fracturing realizing unsupervised automatic monitoring and effectively enhanced the efficiency and automation of monitoring. The developed multidimensional and multidisciplinary integrated interpretation technology of fracturing provides a basis for estimating effectiveness of fracturing and fracturing schemes optimization.
The innovative technology and geophysics-engineering integration strategy is of great significance to improve the accuracy of tight sandstone and shale gas reservoir description and benefits the engineering modification. This abstract will share the practices of above effective and advanced mentioned technologies through the latest E&P application cases of tight sandstone and shale gas reservoir in typical basins in western China.
