Application of Reservoir Strength Characterization and Formation Failure Modeling to Analyze Sand Production Potential and Formulate Sand Control Strategies for a Series of North Sea Gas Reservoirs

1998 ◽  
Author(s):  
R.C. Burton ◽  
E.R. Davis ◽  
N. Morita
Keyword(s):  
North Sea ◽  
Control Strategies ◽  
Sand Production ◽  
Production Potential ◽  
Gas Reservoirs ◽  
Failure Modeling ◽  
Sand Control ◽  
Strength Characterization

scholarly journals A robust fuzzy logic-based model for predicting the critical total drawdown in sand production in oil and gas wells

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0250466
Author(s):  
Fahd Saeed Alakbari ◽  
Mysara Eissa Mohyaldinn ◽  
Mohammed Abdalla Ayoub ◽  
Ali Samer Muhsan ◽  
Ibnelwaleed A. Hussein
Keyword(s):  
Fuzzy Logic ◽  
Correlation Coefficient ◽  
Oil And Gas ◽  
Maximum Error ◽  
Physical Parameters ◽  
Sand Production ◽  
Gas Reservoirs ◽  
The North ◽  
Sand Control ◽  
North Adriatic Sea

Sand management is essential for enhancing the production in oil and gas reservoirs. The critical total drawdown (CTD) is used as a reliable indicator of the onset of sand production; hence, its accurate prediction is very important. There are many published CTD prediction correlations in literature. However, the accuracy of most of these models is questionable. Therefore, further improvement in CTD prediction is needed for more effective and successful sand control. This article presents a robust and accurate fuzzy logic (FL) model for predicting the CTD. Literature on 23 wells of the North Adriatic Sea was used to develop the model. The used data were split into 70% training sets and 30% testing sets. Trend analysis was conducted to verify that the developed model follows the correct physical behavior trends of the input parameters. Some statistical analyses were performed to check the model’s reliability and accuracy as compared to the published correlations. The results demonstrated that the proposed FL model substantially outperforms the current published correlations and shows higher prediction accuracy. These results were verified using the highest correlation coefficient, the lowest average absolute percent relative error (AAPRE), the lowest maximum error (max. AAPRE), the lowest standard deviation (SD), and the lowest root mean square error (RMSE). Results showed that the lowest AAPRE is 8.6%, whereas the highest correlation coefficient is 0.9947. These values of AAPRE (<10%) indicate that the FL model could predicts the CTD more accurately than other published models (>20% AAPRE). Moreover, further analysis indicated the robustness of the FL model, because it follows the trends of all physical parameters affecting the CTD.

Taming the Monster: Arresting Excessive Sand Production Problem in ARAMU037

2021 ◽  
Author(s):  
Emily Ako ◽  
Erasmus Nnanna ◽  
Odumodu Somtochukwu ◽  
Akinmade Moradeke
Keyword(s):  
North Sea ◽  
Niger Delta ◽  
Best Practice ◽  
Integrated Approach ◽  
Sand Production ◽  
Sand Control ◽  
Production Problem ◽  
Normal Production ◽  
The Way

Abstract Chemical Sand Consolidation (SCON) has been used as a means of downhole sand control in Niger Delta since the early 70s. The countries where SCON has been used include Nigeria (Niger Delta), Gabon (Gamba) and UK (North Sea). SCON provides grain-to-grain cementation and locks formation fines in place through the process of adsorption of the sand grains and subsequent polymerization of the resin at elevated well temperatures. The polymerized resin serves to consolidate the surfaces of the sand grain while retaining permeability through the pore spaces. In a typical Niger Delta asset, over 30% of the wells may be completed with SCON. A high percentage are still producing without failure since installation from1970s. Where the original SCON jobs have failed, re-consolidation has also been carried out successfully. Chemical Sand Consolidation development has evolved over the years from: Eposand 112A and B, Eposand 212A and B, Wellfix 2000, Wellfix 3000, Sandstop (resin based), Sandtrap 225, 350 & 500 (resin based) and lately Sandtrap 225,350, 500 (solvent based) and Sandtrap ABC (aqueous based). There have been mixed results experienced with the deployment of either of the latest recipes of SCON. This was due to the fact that the conventional deployment work procedure was followed with the tendency for one-size-fits-all approach to the treatment. This paper details the challenges faced with sand production in ARAMU037, the previous interventions and how an integrated approach to the design and delivery of the most recent intervention restored the way to normal production. The well has now produced for about 2 years with minimal interruption with the activity paying out in less than 6 months. The paper also recommends the best practice for remedial sand control especially for wells in mature assets.

Radiogenic and stable isotope evidence for age and origin of authigenic illites in the Rotliegend, southern North Sea

Clay Minerals ◽  
1994 ◽  
Vol 29 (4) ◽  
pp. 555-565 ◽  
Author(s):  
K. Ziegler ◽  
B. W. Sellwood ◽  
A. E. Fallick
Keyword(s):  
North Sea ◽  
Structural Evolution ◽  
Lower Permian ◽  
Gas Reservoirs ◽  
Gaseous Hydrocarbon ◽  
Oxygen Isotope Exchange ◽  
Basin Inversion ◽  
Southern North Sea ◽  
Evaporative Concentration ◽  
Isotopic Analyses

AbstractAeolian sandstones of the Lower Permian Leman Formation (Rotliegend Group) provide the best gas reservoir in the southern North Sea, but permeability is greatly reduced by the presence of authigenic fibrous illites. New radiogenic (K/Ar) and stable (oxygen and hydrogen) isotope data are presented for fibrous illite cements (<0.1 µm), so that the absolute timing and controlling diagenetic factors for their formation can be more fully evaluated. Thus, the expected quality of gas reservoirs in the southern North Sea might be better predicted. Samples have been analysed from five wells in areas with contrasting structural evolution: the Sole Pit Basin, and the Indefatigable Shelf. The K/Ar ages of between 160 and 190 Ma have been obtained from the Indefatigable Shelf illites, and between 120 and 160 Ma for those from the Sole Pit Basin, reflecting different times of basin inversion. These K/Ar ages are interpreted by reference to burial/thermal models for each well. The temperature of illite precipitation falls between 88 and 140°C. Calculated pore-fluid compositions derived from oxygen and hydrogen isotopic analyses give values of ∼ + 1 to +9‰ (SMOW) δ18O and +1 to −50‰ (SMOW) δD. The illite δD values have probably been affected by isotopic exchange and fractionation with the surrounding gaseous hydrocarbon. The δ18O values reflect the degree to which evaporative concentration had affected Zechstein marine waters which subsequently invaded the Leman Sandstone. Comparisons between δ18O and δD values in clays and in formation water for the Leman Field suggest that oxygen isotope exchange might have taken place, and that the initial K+ and radiogenic 40Ar contents within illites may have been modified.

Orienting Live Well Perforating Technique Provides Innovative Sand-Control Method in the North Sea

2001 ◽  
Vol 16 (03) ◽  
pp. 164-175 ◽  
Author(s):  
Jan Hilding Eriksen ◽  
Francesco Sanfilippo ◽  
Arne L. Kvamsdal ◽  
George Flint ◽  
Erling Kleppa
Keyword(s):  
North Sea ◽  
Control Method ◽  
The North ◽  
Sand Control ◽  
The North Sea

Building Multifrac Completion Strategies in Tight Gas Reservoirs: A North Sea Case

2020 ◽  
Author(s):  
Hernán Buijs ◽  
Clairet Guerra ◽  
Roger Sonwa ◽  
Patrick Nami ◽  
Luciano Vecchia ◽  
...  
Keyword(s):  
North Sea ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs

Shaped Memory Polymer: An Innovative Approach to Sand Control Open Hole Completion in Thin, Multilayered, Depleted Low Permeability Gas Reservoirs

2019 ◽  
Author(s):  
Jason Fuxa ◽  
Paolo Di Giampaolo ◽  
Giovanni Ferrara ◽  
Mario Di Pietro ◽  
Marco Sportelli ◽  
...  
Keyword(s):  
Innovative Approach ◽  
Low Permeability ◽  
Gas Reservoirs ◽  
Sand Control ◽  
Open Hole

Sand Production in Ultra-Weak Sandstones: Is Sand Control Absolutely Necessary?

1997 ◽  
Author(s):  
J. Tronvoll ◽  
E. Papamichos ◽  
A. Skjaerstein ◽  
F. Sanfilippo
Keyword(s):  
Sand Production ◽  
Sand Control
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