Foam Acid Treatment - The Key to Stimulation of Carbonate Reservoirs in Depleted Oil Fields of the Samara Region (Russian)

2017 ◽  
Author(s):  
Alexander Letichevskiy ◽  
Alexey Nikitin ◽  
Alexey Parfenov ◽  
Vitaliy Makarenko ◽  
Ilya Lavrov ◽  
...  
Keyword(s):  
Acid Treatment ◽  
Carbonate Reservoirs ◽  
Oil Fields ◽  
Stimulation Of

Foam Acid Treatment - The Key to Stimulation of Carbonate Reservoirs in Depleted Oil Fields of the Samara Region

2017 ◽  
Author(s):  
Alexander Letichevskiy ◽  
Alexey Nikitin ◽  
Alexey Parfenov ◽  
Vitaliy Makarenko ◽  
Ilya Lavrov ◽  
...  
Keyword(s):  
Acid Treatment ◽  
Carbonate Reservoirs ◽  
Oil Fields ◽  
Stimulation Of

scholarly journals Forecasting Efficiency of Acid Impact on the Basis of Construction of Mathematical Models Taking into Account the Technology and Used Composition

2021 ◽  
Vol 132 (1) ◽  
pp. 30-35
Author(s):  
V. A. Novikov ◽  
Keyword(s):  
Mathematical Models ◽  
Acid Treatment ◽  
Mutual Influence ◽  
Oil Field ◽  
Carbonate Reservoirs ◽  
Technical Measure ◽  
Main Factors ◽  
Multidimensional Models ◽  
Perm Region ◽  
Stimulation Of

Acid treatment is one of the most studied methods of stimulation of inflow in carbonate reservoirs. Nevertheless, enterprises are faced with the problem of reducing the planned production rates of wells after such events, which is due to geological and technological reasons. Taking them into account when planning impact and predicting effectiveness is possible by analyzing actual production materials using mathematical statistics methods. In this paper, using the example of a oil field in the southern part of Perm region, the main factors that influence the efficiency of acid treatments are identified, a number of multidimensional models are obtained that take into account their mutual influence and allow determining the result of a geological and technical measure.

Effective Stimulation of Carbonate Reservoirs around the World by Creating Multiple Drainage Holes

2008 ◽  
Author(s):  
Ricardo Salomao Aboud ◽  
Jose Daniel Diaz ◽  
Alfredo Mendez ◽  
Leonard John Kalfayan ◽  
Lance Nigel Portman ◽  
...  
Keyword(s):  
Carbonate Reservoirs ◽  
The World ◽  
Stimulation Of

Effective Stimulation of Very Thick, Layered Carbonate Reservoirs Without the Use of Mechanical Isolation

2009 ◽  
Author(s):  
Chris E. Shuchart ◽  
Shalawn Jackson ◽  
Janette Mendez-Santiago ◽  
Nancy Hyangsil Choi ◽  
John K. Montgomery ◽  
...  
Keyword(s):  
Carbonate Reservoirs ◽  
Mechanical Isolation ◽  
Stimulation Of

The New Flow Control Devices Autonomously Controlling the Performance of Matrix Acid Stimulation Operations in Carbonate Reservoirs

2021 ◽  
Author(s):  
Mojtaba Moradi ◽  
Michael R Konopczynski
Keyword(s):  
Flow Control ◽  
Dynamic Change ◽  
Injection Rate ◽  
Control Flow ◽  
Carbonate Reservoir ◽  
Operating Conditions ◽  
Carbonate Reservoirs ◽  
High Permeability ◽  
The Impact ◽  
Stimulation Of

Abstract Matrix acidizing is a common but complex stimulation treatment that could significantly improve production/injection rate, particularly in carbonate reservoirs. However, the desired improvement in all zones of the well by such operation may not be achieved due to existing and/or developing reservoir heterogeneity. This paper describes how a new flow control device (FCD) previously used to control water injection in long horizontal wells can also be used to improve the conformance of acid stimulation in carbonate reservoirs. Acid stimulation of a carbonate reservoir is a positive feedback process. Acid preferentially takes the least resistant path, an area with higher permeability or low skin. Once acid reacts with the formation, the injectivity in that zone increases, resulting in further preferential injection in the stimulated zone. Over-treating a high permeability zone results in poor distribution of acid to low permeability zones. Mechanical, chemical or foam diversions have been used to improve stimulation conformance along the wellbore, however, they may fail in carbonate reservoirs with natural fractures where fracture injectivity dominates the stimulation process. A new FCD has been developed to autonomously control flow and provide mechanical diversion during matrix stimulation. Once a predefined upper limit flowrate is reached at a zone, the valve autonomously closes. This eliminates the impact of thief zone on acid injection conformance and maintains a prescribed acid distribution. Like other FCDs, this device is installed in several compartments in the wells. The device has two operating conditions, one, as a passive outflow control valve, and two, as a barrier when the flow rate through the valve exceeds a designed limit, analogous to an electrical circuit breaker. Once a zone has been sufficiently stimulated by the acid and the injection rate in that zone exceeds the device trip point, the device in that zone closes and restricts further stimulation. Acid can then flow to and stimulate other zones This process can be repeated later in well life to re-stimulate zones. This performance enables the operators to minimise the impacts of high permeability zones on the acid conformance and to autonomously react to a dynamic change in reservoirs properties, specifically the growth of wormholes. The device can be installed as part of lower completions in both injection and production wells. It can be retrofitted in existing completions or be used in a retrievable completion. This technology allows repeat stimulation of carbonate reservoirs, providing mechanical diversion without the need for coiled tubing or other complex intervention. This paper will briefly present an overview of the device performance, flow loop testing and some results from numerical modelling. The paper also discusses the completion design workflow in carbonates reservoirs.

Determining the structural discontinuities in fractured carbonate reservoirs using FMS and VSP logs in the one of oil fields on West of Zagros

2016 ◽  
Vol GeoKurdistan II (Special issue) ◽  
pp. 437-443
Author(s):  
Abdullah Moradi ◽  
◽  
Bijan Maleki ◽  
Nazir Anvar Mafakheri ◽  
◽  
...  
Keyword(s):  
Carbonate Reservoirs ◽  
Oil Fields ◽  
Fractured Carbonate ◽  
The One
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