Abstract
Through the drilling risk factors analysis and drilling design optimization of high-efficiency wells in Daqing placanticline, the safety and efficiency of drilling construction of high-efficiency wells have ensured. Combined with the characteristics of Daqing placanticline reservoir, development status and drilling situation, the main risk types and hazards affecting the drilling safety of high-efficiency wells in placantic reservoirs are analyzed, and the formation pressure characteristics, formation abnormal high pressure types and pressure prediction analysis methods of high-efficiency wells are summarized. In the process of drilling design, aiming at the main risk and the abnormal high pressure of formation, the reasonable drilling fluid density is designed, the matching drilling fluid system is selected, and the drilling control and shut-in program is optimized according to the development layer system and the spatial relationship between the production well and the design well trajectory. Practice had proved that the optimization of shut-in program was scientific and feasible, and there was no complicated drilling situation, which ensured the safety and efficiency of drilling construction, and reduced the influence of drilling shut-in on production. The risk analysis and optimization method provide technical experience for the design optimization and drilling safety of efficient wells in the middle and late stages of oilfield development.
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Liu, Sr. (2022). Analysis of Drilling Risks and Design Optimizations of High Efficiency Wells in Daqing Placanticline. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2021. IFEDC 2021. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-2149-0_358
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DOI: https://doi.org/10.1007/978-981-19-2149-0_358
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