High Resolution Dynamic Modelling to Revitalize a Mature Oil Field in a Low Oil Price Scenario

Author(s):  
D. G. Perez ◽  
G. A. Pedersen ◽  
R. E. Lehu ◽  
A. Thompson ◽  
E. Morettini
2005 ◽  
Author(s):  
Marzena M. Olewczynska ◽  
Jurgen Grotsch ◽  
Jamal Al Jundi ◽  
Shankar Rao

2021 ◽  
Author(s):  
Mohamed Elkhawaga ◽  
Wael A. Elghaney ◽  
Rajarajan Naidu ◽  
Assef Hussen ◽  
Ramy Rafaat ◽  
...  

Abstract Optimizing the number of casing strings has a direct impact on cost of drilling a well. The objective of the case study presented in this paper is the demonstration of reducing cost through integration of data. This paper shows the impact of high-resolution 3D geomechanical modeling on well cost optimization for the GS327 Oil field. The field is located in the Sothern Gulf of Suez basin and has been developed by 20 wells The conventional casing design in the field included three sections. In this mature field, especially with the challenge of reducing production cost, it is imperative to look for opportunites to optimize cost in drilling new wells to sustain ptoduction. 3D geomechanics is crucial for such cases in order to optimize the cost per barrel at the same time help to drill new wells safely. An old wellbore stability study did not support the decision-maker to merge any hole sections. However, there was not geomechanics-related problems recorded during the drilling the drilling of different mud weights. In this study, a 3D geomechanical model was developed and the new mud weight calculations positively affected the casing design for two new wells. The cost optimization will be useful for any future wells to be drilled in this area. This study documents how a 3D geomechanical model helped in the successful delivery of objectives (guided by an understanding of pore pressure and rock properties) through revision of mud weight window calculations that helped in optimizing the casing design and eliminate the need for an intermediate casing. This study reveals that the new calculated pore pressure in the GS327 field is predominantly hydrostatic with a minor decline in the reservoir pressure. In addition, rock strength of the shale is moderately high and nearly homogeneous, which helped in achieving a new casing design for the last two drilled wells in the field.


2021 ◽  
Author(s):  
Oghenerume Ogolo ◽  
Petrus Nzerem ◽  
Ikechukwu Okafor ◽  
Raji Abubakar ◽  
Mohamed Mahmoud ◽  
...  

Abstract Globally, there are two types of petroleum fiscal system; the concessionary and the contractual petroleum fiscal system. The main differences between the two types of petroleum fiscal system is the ownership of the resources and some distinct fiscal terms. The contractual petroleum fiscal system specifies a cost recovery option and profit oil split unlike the concessionary petroleum fiscal system that allows the contractor to recoup his capital before payment of tax. This tends to increase the risk associated with the host government revenue as investment in the production of hydrocarbon is filled with uncertainties. There is a need to redesign the concessionary petroleum fiscal to enable it reduce the risk associated with the host government revenue by making the host government to earn revenue early from petroleum investment. This research therefore evaluated a hybrid petroleum fiscal system for investment in the exploration and production of hydrocarbon. The concessionary petroleum fiscal system was adjusted to include a cost recovery option. Petroleum economic model for investment in a typical onshore oil field was built using spreadsheet modelling technique with the fiscal terms in the hybrid petroleum fiscal system embedded in it. The cost recovery option and oil price in the model were varied between 0-100% and $20-$100 per barrel. The NCF, IRR and payout period of the investment were determined. It was observed that the lower the cost recovery option, the higher the host government revenue. From the profitability analysis of the investment in the hybrid petroleum fiscal system, it was observed that when the price of oil was $100/bbl, the NCF of the host government was $9146 and $8426.3 for 0% and 80% cost recovery option. The lower the cost recovery option, the higher the payout period and the lower the internal rate of return. Though lower cost recovery increased the host government revenue more but it may make the hybrid petroleum fiscal system unattractive for investment in periods of low oil price. Hence a higher cost recovery option was recommended for the use of this type of petroleum fiscal system.


2005 ◽  
Author(s):  
Marzena M. Olewczynska ◽  
Jurgen Grotsch ◽  
Jamal Al Jundi ◽  
Shankar Rao

Author(s):  
Jaime Nu´n˜ez Farfa´n ◽  
Diego Cruz Roque ◽  
Pro´coro Barrera Nabor ◽  
Wilbert Koh Cambranis

In order to define the zones at risk by the shallow gas and natural seeps of hydrocarbons in the Campeche Sound, a 3D geophysical study of 4 areas has been carried out in the region of the Cantarell oil field [1]. The results of this high resolution survey were correlated with previous explorations and it was possible to define the migration route and evolution of the shallow gas accumulations. The volume increase of the accumulations detected can not be explained by the lack of precision of the instruments and is more likely connected to the exploitation of the reservoir. The faults that transport the hydrocarbons from the reservoir to shallow strata define an area that contains several important platforms likely to be affected by the gas migration process. This geophysical survey was also used to define the location of three geotechnical borings for studying the degradation on the properties of the soils due to the presence of hydrocarbons that support the platforms.


1999 ◽  
Author(s):  
Paul Wood ◽  
Svend Pettersson ◽  
Brunei Shell ◽  
David Gibson ◽  
Wilson Rowe
Keyword(s):  

2018 ◽  
Author(s):  
Hongfu Shi ◽  
Xianbo Luo ◽  
Yifan He ◽  
Cunliang Chen ◽  
Bo Re
Keyword(s):  

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