ANALYSIS OF CRITERIA FOR ASSESSMENT OF PERFORMANCE OF FORMATION PRESSURE MAINTENANCE SYSTEM IN FIVE DEVELOPMENT BLOCKS OF LATE-STAGE ROMASHKINSKOYE FIELD EAST-LENINOGORSKAYA AREA
Rakhmaev L.G., Nizaev R.Kh., Gutorov Yu.А.
DOI https://doi.org/10.25689/NP.2018.3.64-80
Abstract
The paper presents a novel method to assess the performance of formation pressure maintenance system in five waterflooded blocks of EastLeninogorskaya area of the mature Romashkinskoye oil field operated by NGDU AZNAKAEVSKNEFT. To this end, the authors offer to apply the value of divergence between the project and the current recovery factors (RF) for each block for a certain production period as a criterion of effectiveness of the formation pressure maintenance system. They also introduce three more coefficients as key indicators of formation pressure maintenance system performance. These are: the injected water-produced oil ratio, the produced water-injected water ratio, and the injected water-ROIP reserves ratio. The maximum divergence between the RF values was noted in Blocks Nos. 3 and 5. The authors attempt to explain the observed phenomenon by peculiar behavior of correlation-statistical relationships between the injected water-produced oil ratio, the produced water-injected water ratio, and the reservoir properties of the development targets, on the one hand, and the voidage replacement ratio for all five blocks, on the other hand. The analysis of the above relationships showed that they can be used as diagnostic criteria of effectiveness of formation pressure maintenance system in each of the five blocks under consideration.
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Authors
Rakhmaev L.G., Geologist, PhD candidate, NGDU Aznakaevskneft of PJSC TATNEFT, Aznakaevo, Republic of Tatarstan, Russia
E-mail: azn09sg@tatneft.ru
Nizaev R.Kh., Dr.Sc, Associate Professor, Head of Reservoir Simulation Laboratory, Reservoir Engineering Department, TatNIPIneft Institute - PJSC TATNEFT, Bugulma, Republic of Tatarstan, Russia
E-mail: nizaev@tatnipi.ru
Gutorov Yu.A., Dr.Sc, Deputy Director for Research, R&D Center Neftyanaya Dolina, Oktyabrsky, Republic of Bashkortostan, Russia
E-mail: gutorov70@mail.ru
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