Abstract
Tangdong region of Dagang oilfield as a key block for high-efficiency storage enhancement, oil and gas are abnormally active, medium pressure stability during the cementation process is paradoxically outstanding against water leakage, and the quality of cementation is difficult to guarantee. For this purpose, the paper has carried out an analysis of the influencing factors of regional cementation quality, to find out the three main controlling factors that constrain the quality of cementation in this block, namely the quality of the wellbore, the formation characteristics and the cement paste performance, to propose effective technical measures for the main control factors, including the optimization of drilling engineering design in the previous period, the simulation before cementation and the on-site construction management measures. On site application of the three wells resulted in a significant improvement in the quality of solidification of the production casing and achieved an average of 88.36% of good quality cemented segment rate, of which the three segment trajectory was preferred for the TD3 well with a maximum deviation angle of 37.69°, which greatly reduced the difficulty of trajectory control, while the potassium salt polymer system and one drilling technique measure were preferred, providing good quality borehole conditions for the cemented construction and, based on the actual borehole situation, optimizing the centering guide, cement slurry column structure and the cemented construction plan. The cementation quality segment rate reached 94.05% and the block record was refreshed. The smooth implementation of the three wells not only provides a reliable basis for the subsequent wells in the Tangdong region, but also provides references and borrowing for improving the cementation quality in similar oil fields.
Copyright 2023, IFEDC Organizing Committee.
This paper was prepared for presentation at the 2023 International Field Exploration and Development Conference in Wuhan, China, 20–22 September 2023.
This paper was selected for presentation by the IFEDC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC Technical Team and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Technical Committee its members. Papers presented at the Conference are subject to publication review by Professional Team of IFEDC Technical Committee. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of IFEDC Organizing Committee is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC. Contact email: paper@ifedc.org.
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Yang, Yy. et al. (2024). Influencing Factors and Countermeasures of Cementing Quality in Tangdong Area of Dagang Oilfield. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2023. IFEDC 2023. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-97-0256-5_67
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