Introducing a New Logging–While–Drilling Ultrasonic Borehole Imaging Technology Using Oil–Based Mud in Mature Field, Offshore Abu Dhabi

2020 ◽  
Author(s):  
Yassar Goraya ◽  
Ali Saee Alfelasi ◽  
Hocine Khemissa ◽  
Bader Mohamed Al Dhafari ◽  
Muhammad Ashraf ◽  
...  
Keyword(s):  
Abu Dhabi ◽  
Imaging Technology ◽  
Mature Field ◽  
Logging While Drilling ◽  
Borehole Imaging

Integrated Logging While Drilling and Wireline Borehole Imaging Applications in Offshore Nile Delta Reservoirs

2010 ◽  
Author(s):  
Dedi Juandi ◽  
Saad Hassan ◽  
Mario Biagi ◽  
Alessandro Fasto ◽  
Mohamed Mohie ◽  
...  
Keyword(s):  
Nile Delta ◽  
Logging While Drilling ◽  
Borehole Imaging

Khuff and Pre-Khuff Reservoir Fracture Characterization using the Cross Dipole Shear Wave Imaging and Borehole Imaging Data Integration

2021 ◽  
Author(s):  
Pradeep Menon ◽  
Tarek Swedan ◽  
Kamran Jan ◽  
M. S. Al-Shehhi ◽  
Piyanuch Kieduppatum ◽  
...  
Keyword(s):  
Imaging Technique ◽  
Complex Structure ◽  
Natural Fracture ◽  
Abu Dhabi ◽  
Destructive Interference ◽  
Acoustic Reflection ◽  
Reflection Imaging ◽  
Induced Fractures ◽  
Borehole Imaging ◽  
Acoustic Reflection Imaging

Abstract Increasing demands for gas in UAE have led to increased focus on more tight gas reservoirs like Khuff and pre-Khuff formations, away from the conventional oil-bearing carbonate reservoirs. The case study presented is in an offshore field, Northwest of Abu Dhabi city. The structure, with an area of 50 Sq.km was first identified in 1966 and it is part of the regional N-S extending structural. The multi-discipline approach applied in this study required the integration of a suite of open-hole data over a variety of length scales. Combination of the Borehole Acoustic Reflection Imaging technique and borehole imaging logs (BHI) in 3D, provides a better understanding of the complex fracturing network and the associated formation stress orientation up to 100ft away from the wellbore. The ability to "see" away from wellbore what was previously hidden on seismic, allows unlocking further potential reserves or avoiding certain production hazards. The well has penetrated the highly economical tight clastic Pre-khuff formation and the carbonate Kuff formation, allowing the analysis over a large geological history of offshore Abu Dhabi. The coherency of all data has helped establish for the first time a baseline understanding of the role of the fractures and fault in the petrophysical properties distribution along the wellbore and the 3D structural characterization in an larger area around the wellbore (up to 100ft). The emphasize in this paper is on the Borehole Acoustic Reflection Imaging technique (DSWI), which allows the identification of both intersecting and non-intersecting of geological features with a depth of investigation up to 100 ft away from the borehole. Moreover, the combination of DSWI with BHI have been used for the anisotropy estimation away from wellbore especially in a very tight and fractured reservoir deciphering multiple fault orientation, which potentially, cancel the anisotropy estimation due to destructive interference. In addition to the presence of drilling induced fractures interfering in with the natural fracture as seen on the BHI. The detailed BHI interpretation and the petrophysical data revealed that the fracture densities and orientation vary from bottom to top interval indicating tectonic regimes affecting the field. The lithological variation due to the evolution of the depositional setting has significantly influenced the fracture distribution and their length. The presence of these induced fractures and how deep they propagate into the formation, dominates the behavior acoustic anisotropy by reaching the flexural (dipole shear) investigation zone (3 to 4ft deep). It is also interesting to see the behavior of both natural and induced fractures and their respective strike change over the different formations revealing a geomechanically complex structure.

The Synergy Between Borehole Imaging and Geosteering

2021 ◽  
Author(s):  
Chidi Ndokwu Ndokwu ◽  
Kenneth Amadi ◽  
Victor Okowi ◽  
Kingsley O. Okengwu ◽  
Jones E. Acra
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Depositional Environments ◽  
Geological Structures ◽  
Gas Well ◽  
Gas Industry ◽  
Different Types ◽  
Petrophysical Parameter ◽  
Logging While Drilling ◽  
Borehole Imaging

Abstract The quest to gain more knowledge of the subsurface and to reduce uncertainty in the interpretation of subsurface data has been an age-long effort in the oil and gas industry. To achieve this, asset owners use tools with improved resolution, utilize different types of logging tools and integrate the interpretation from these logging tools. This paper will review some projects where data from borehole imaging tools were used to support geosteering decisions and to gain more knowledge of reservoir structure. Borehole images are logs based on the circumferential measurement of a petrophysical parameter along a borehole wall. Logging-while-drilling borehole images can be used for structural, sedimentological and petrophysical analysis. These near-wellbore analyses contribute greatly to the success of most geosteering jobs. Geosteering is a process used in placing high-angled and horizontal wells in subsurface intervals of interest. It involves the use and integration of data from varied sources. This paper will show different scenarios, in different depositional environments, where borehole imaging supported the geosteering process and how geological interpretations from geosteering brought more clarity to borehole imaging analysis. Examples of these will highlight the stratigraphic relationship between geological structures and wellbore trajectory, detection of subsurface structural discontinuities, primary sedimentary structures, and the interpretation of complex geological structures. This paper will broaden our understanding of the applications of borehole imaging and how it integrates with geosteering in achieving oil and gas well objectives.

Borehole Imaging Technology Visualizes Photorealistically in Oil-Based Muds

2014 ◽  
Vol 66 (11) ◽  
pp. 36-38 ◽  
Author(s):  
Robert J. Laronga ◽  
Ehab Shalaby
Keyword(s):  
Imaging Technology ◽  
Borehole Imaging
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