Ultra–deep Resistivity Technology as a Solution for Efficient Well Placement; Geosteering and Fluid Mapping to Reduce Reservoir Uncertainty and Eliminate Pilot Hole-First Time in Offshore Abu Dhabi, UAE

2020 ◽  
Author(s):  
Hocine Amor Khemissa ◽  
Salem Ali Alkindi ◽  
Ali Saeed Al Felasi ◽  
Omar Imad Al Mutwali ◽  
Saeed Saleh Al Hajeri ◽  
...  
Keyword(s):  
Abu Dhabi ◽  
Well Placement ◽  
Pilot Hole ◽  
First Time

Deviated Drilling Through Salt Dome and Horizontalization Across Extremely Heterogeneous Formations: A Case Study in North Abu Dhabi

2021 ◽  
Author(s):  
Ygnacio Jesus Nunez ◽  
Mohamed Sameer ◽  
Fernando Ruiz ◽  
Ahmed Abdulla Al Mutawa ◽  
Eisa Daban Al Shamisi ◽  
...  
Keyword(s):  
United Arab Emirates ◽  
Power Plants ◽  
Salt Dome ◽  
Lessons Learned ◽  
Abu Dhabi ◽  
Horizontal Section ◽  
Pilot Hole ◽  
Drilling Parameters ◽  
Heterogeneous Formations ◽  
First Time

Abstract Over the last 60 years, Abu Dhabi, United Arab Emirates (UAE) has been producing oil and gas from different conventional fields. Nowadays, and as part of the State long-term strategy to achieve the nation objective of gas self-sufficiency, it has been decided to explore, appraise and develop unconventional plays in the Northern area including the construction of early production facilities to supply the gas power plants. Three wells were drilled as part of the first phase of the project; consisting of a pilot hole into an extremely heterogeneous formation; two of them were horizontalized into the targeted formations. The first well across the salt represented a tremendous challenge due to limited rig capacity generating hole stability issues that required unplanned remedial jobs. The second well was deviated across the salt as pilot hole, then side-tracked and horizontalized in the targeted reservoirs. The third well was drilled directly as horizontal lateral based on previous lessons learned validating the horizontal concept for the future field development plan. The exploration phase constituted by these three wells, were drilled and completed successfully. A detailed data gathering program was executed allowing mapping of the area validating the presence of gas. The drilling parameters, such as rate of penetration (ROP) for the horizontal section was enhanced by optimizing the drilling Bit design. The mud logging results have confirmed the extremely heterogeneous formations across this section allowing determining the most fit for purpose bottom hole assembly (BHA); obtained after a detailed optimization process. Multiple lessons learned were captured and immediately applied leading to a significant reduction on total days per well that reflected on an outstanding cost reduction including rig move optimization, incrementing the overall efficiency of the operations. This project has proven the potential of unlocking the development of this field focusing on the targeted untapped reservoirs. Key unprecedented achievements have been fulfilled during the execution of this phase of the project: 1. First time to drill across a salt dome in Abu Dhabi Emirate 2. First time that horizontalization has been applied to the targeted formations. In addition, a better understanding of the optimum drilling parameters for future phases has been obtained.

Analysing the image of Abu Dhabi and Dubai as tourism destinations – The perception of first-time visitors from Germany

2017 ◽  
Vol 19 (1) ◽  
pp. 54-64 ◽  
Author(s):  
Hanno M Martens ◽  
Dirk Reiser
Keyword(s):  
Middle East ◽  
Empirical Study ◽  
Tourism Development ◽  
Destination Image ◽  
Abu Dhabi ◽  
Environmentally Conscious ◽  
The World ◽  
Tourism Destinations ◽  
Similar Basis ◽  
First Time

The Middle East is one of the fastest growing tourism regions in the world. Especially Dubai (since the 1980s) and Abu Dhabi (since the 1990s) have invested heavily in tourism development to firstly enhance their recognition as international destinations and secondly to diversify their economies away from the oil production. Surprisingly, there is a lack of academic published articles on those two emirates’ international destination image. This paper attempts to fill this gap by studying and comparing the images of Abu Dhabi and Dubai amongst potential first-time visitors from one of their main source markets – Germany. An empirical study amongst 300 respondents from North-Rhine Westphalia, Germany, was conducted to reveal the cognitive image attributes of Dubai and Abu Dhabi for non-visitors. Despite both places having a similar basis for destination development, their images differ. Thus, Abu Dhabi and Dubai are not seen as competitors on the tourism market, instead they could even increase the mutual benefits through highlighting specific images more distinctly. Further, the research identified a missing fit between the desired tourism destination image for both destinations and the perceived destination image. This is especially significant for the aspect of sustainability, which both emirates try to promote. Potential tourists rather perceive both emirates as unsustainable and not environmentally conscious.

Horizontal Well Placement in a Thin Heterogeneous Carbonate Reservoir, Utilizing Azimuthal Sonic and Resistivity Measurements, a Case Study from Offshore Abu Dhabi

2018 ◽  
Author(s):  
Amr M. Serry ◽  
Sultan Al-Hassani ◽  
Ibrahim Al-Tamimi ◽  
Owais A. Khan ◽  
Shafiq Naseem ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Carbonate Reservoir ◽  
Abu Dhabi ◽  
Well Placement ◽  
Resistivity Measurements

Remote Reservoir Exploration in Odoptu-More Field by Delivering ERD Wells Using Multilateral Drilling Technology

2021 ◽  
Author(s):  
Anna Shakhova ◽  
Natalia Lisyutina ◽  
Irina Lebedeva ◽  
Oleg Valshin ◽  
Roman Savinov ◽  
...  
Keyword(s):  
Pilot Hole ◽  
Well Design ◽  
Engineering Team ◽  
Open Hole ◽  
Drilling Technology ◽  
Electrical Submersible Pump ◽  
Standard Set ◽  
Extended Reach Drilling ◽  
Fluid Rheology ◽  
First Time

Abstract This paper provides the results that were achieved and shares the drilling unique practices that were implemented to deliver the first complex bilateral extended reach drilling (ERD) well in Odoptu-more field (North Dome). Well design driven by geological objectives considered drilling 215.9mm main and pilot holes (PH). Well complexity was governed by the type of a profile having ERD ratio of 5.22 (main hole) / 4.60 (PH) and trajectory's 3D nature (turn in azimuth of 90 degrees) compared to previous wells in the project drilled mainly with 2D profiles. Apart from the problems connected with drilling and casing upper sections key challenges comprised kicking off in 215.9mm open hole at 5955m MD and 1512m TVD with rotary steerable system, setting cement plugs at shallow true vertical depth (TVD) at 89 degrees of inclination to abandon laterally drilled PH, delivering 168.3mm production liner to bottom with a risk of entering a lateral while running in hole. An effective collaboration between integrated engineering team and customer departments went far beyond ERD standard set of operations already existing in the project thus allowing to break its own records and to set new achievements due to integrated technological approach. The longest 444.5mm section (2975 m) was drilled in one run achieving the record daily drilling rate and rate of penetration (ROP). Cementing of 244.5mm floated liner resulted in the highest good cement bond integrity percentage ever achieved among other wells in project due to new ways of casing standoff and fluid rheology hierarchy modeling. For the first time in the project 215.9mm main horizontal hole in extreme reach ERD well has been drilled by kicking off in open hole from the pilot horizontal one with push-the-bit rotary steerable system without a kickoff plug with pilot hole being abandoned by setting cement plugs. Project-specific risk assessment conducted by team allowed successful deployment of 168.3mm liner into the main hole. Moreover, due to thorough engineering planning electrical submersible pump (ESP) was run without extending 244.5mm liner to surface by tie-back thus saving additional 7 days. Drilling first bilateral ERD well unlocked opportunities for the operator to reach, explore and develop different extended geological targets thus eliminating well construction process of additional wells on drilling upper sections.

Ultra-Deep Resistivity Mapping Tool Provided Geostopping Solution to Reduce Uncertainty and Eliminated the Need for Pilot Holes for the First Time Offshore Abu Dhabi

2021 ◽  
Author(s):  
Islam Khaled Moustafa ◽  
Freddy Alfonso Gutierrez ◽  
Ali Saeed Alfelasi ◽  
Hocine Khemissa ◽  
Omar Al Mutwali ◽  
...  
Keyword(s):  
Real Time ◽  
Water Saturation ◽  
Firing Frequency ◽  
Abu Dhabi ◽  
Target Zones ◽  
The Real ◽  
Pilot Hole ◽  
Low Resistivity ◽  
Mapping Tool ◽  
The Future

Abstract Drilling horizontal wells in the mature giant carbonate fields offshore Abu Dhabi, where high uncertainty regarding the lateral distribution of fluids results in variable water saturation, is very challenging. In order to meet the challenges and reduce uncertainty, the plan was to drill pilot holes to evaluate the resistivity of the target zones and plan horizontal sections based on the information gained. To investigate the possibility of avoiding pilot holes in the future, an ultra-deep electromagnetic (EM) tool was deployed to map the mature reservoirs, identifying formation and fluid boundaries before penetrating them, avoiding the need for pilot holes. Prewell inversion modeling was conducted to optimize the spacing and firing frequency selection and to facilitate early real-time geosteering and geostopping decisions. The plan was to run the ultra-deep resistivity mapping tool in conjunction with shallow propagation resistivity, density, and neutron porosity while drilling the 8 ½-in. landing section. The real-time ultra-deep EM inversion was run using depth of inversions up to 120 ft., to be able to detect the reservoir early and evaluate the predicted reservoir resistivity. This would allow optimization of any geostopping decision. The ultra-deep EM tool delivered accurate mapping of thin reservoir layers while drilling the 8 ½ inch section, as well as enhanced mapping of low resistivity zones up to 85 ft. True Vertical Thickness (TVT) in a challenging low resistivity environment. The real-time EM inversion enabled the prediction of resistivity values in target zones prior to entering the reservoir; values were later crosschecked against open-hole logs for validation. The results enabled identification of the optimal geostopping point in the 8 ½-in. section, enabling up to seven rig days to be saved in the future by eliminating pilot holes, in addition to eliminating the risk of setting a whipstock at high inclination with subsequent milling operations. In specific cases, this minimizes drilling risks in unknown/high reservoir pressure zones by improving early detection of a formation tops, thus improving geostopping decisions. Plans were modified for a nearby future well and the pilot-hole phase was eliminated because of the confidence provided by these results. Deployment of the ultra-deep EM tool in these mature carbonate reservoirs may reduce the uncertainty associated with fluid migration. In addition, use of the tool can facilitate precise geosteering to maintain distance from fluid boundaries in thick reservoirs. Furthermore, due to the depths of investigation possible with these tools, it will help enable the mapping of nearby reservoirs for future development. Further multi-disciplinary studies remain desirable using existing standard log data to validate the effectiveness of this concept for different fields and reservoirs.

Achieve Demanding Targets: Successful Well Placement With No Harm to the Environment. Case Study from Offshore Abu Dhabi

2016 ◽  
Author(s):  
S. M. Al-Jaberi ◽  
M. M. Amer ◽  
J. Marrauld ◽  
Y. Yuliandri ◽  
S. Al-Braik ◽  
...  
Keyword(s):  
Abu Dhabi ◽  
Well Placement
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