Abstract
Well pattern infilling is a form of productivity construction in old oil fields. The economy of new drillings determines the infilling feasibility and the increased quantity of recoverable reserves. Therefore, a new potential evaluation method for well pattern infilling is proposed, which considers the well pattern infilling as productivity construction project while taking the economic standard as feasible criterion for infilling. Firstly, the rules and main factors for increasing the recoverable reserves of new drilling wells are analyzed. Secondly, infilling wells with different scales are considered as a series of productivity construction projects, for which the oil production curves and the parameters of economic evaluation are determined. Thirdly, the economy of these projects is evaluated under different oil prices, and the scale of drilling and increasing recoverable reservoir is optimized according to the evaluation results under the given economic standard. On that basis, a relationship is established. The new method has been shown to be more practical, accurate, and suitable for strategic planning research and oil reservoir management work.
Copyright 2018, Shaanxi Petroleum Society.
This paper was prepared for presentation at the 2018 International Field Exploration and Development Conference in Xi’an, China, 18–20 September, 2018.
This paper was selected for presentation by the IFEDC Committee following the 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 Committee and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Committee, its members. Papers presented at the Conference are subject to publication review by Professional Committee of Petroleum Engineering of Shaanxi Petroleum Society. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of Shaanxi Petroleum Society 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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Abbreviations
- E R :
-
recovery factor, %
- E D :
-
displacement efficiency, %
- f :
-
well density, wells/km2
- b :
-
well pattern coefficient
- E Rf :
-
recovery factor of the well pattern with the well density of f, %
- E Rcw :
-
recovery factor in the case of the current well density, %
- f cw :
-
current well density, wells/km2
- N :
-
oil initially in place, 100,000,000 tons
- S :
-
oil-bearing area, km2
- q(f i ) :
-
the initial daily production per well in the case of the production capacity building project sequence i, t/d
- r n :
-
injector/producer ratio, dimensionless
- n :
-
total quantity of wells
- C r :
-
production capacity contribution ratio, %
- A r :
-
production realization rate, %
- D j :
-
decline rate, %
- NPV:
-
net present value, RMB yuan
- IRR:
-
internal rate of return, %
- i c :
-
benchmark yield, %
- i :
-
sequence number of the production capacity building project
- j :
-
production lifecycle of the project, year
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Acknowledgements
This paper is supported by the national science and technology major project “Domestic oil and gas development and strategy research (2016ZX05016-006).”
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Feng, J. et al. (2020). A Novel Method to Evaluate the Well Pattern Infilling Potential for Water-Flooding Reservoirs. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2018. IFEDC 2018. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-7127-1_59
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