Abstract
Due to high viscosity, strong heterogeneity and wide development of interbeds, the development of super heavy oil category III reservoir is very difficult. The main development technology SAGD is affected by interlayer and process conditions, some well groups have some problems, such as low production level of horizontal section, uneven development of steam chamber and slow lateral expansion. SAGD technology of vertical well auxiliary is to improve SAGD development effect by making use of SAGD adjacent vertical well, forming thermal connection between vertical well steam huff and puff and SAGD well group, continuous steam injection of vertical well and expansion of steam chamber scale. Vertical well assisted SAGD can improve the development of steam chamber and increase oil production rate. The selection conditions of auxiliary vertical wells are demonstrated by numerical simulation technology, and the perforation parameters, steam huff puff stage and steam drive stage of vertical wells are optimized considering the interlayer distribution. Finally, it is verified in the actual model. With the aid of vertical wells, the average daily oil production of single well group is increased by 5 t/d, the oil steam ratio is increased by 0.021, and the recovery factor is increased by 6.3%, which effectively improves the development effect. The research results provide technical support for SAGD efficient development assisted by vertical wells in class III super heavy oil reservoirs.
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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Wang, Q., He, Wj., Gao, L., Gao, Y. (2024). SAGD Enhanced Oil Recovery Technology of Vertical Well Assisted Double Horizontal Well in Super Heavy Oil Category-III Reservoir. 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/10.1007/978-981-97-0264-0_93
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