Drilling in time: geosteering a well using real‐time borehole seismic measurements: a case history from the Gulf of Mexico

2005 ◽  
Author(s):  
Chris Durrand ◽  
Tony Skeryanc ◽  
Charles Deri ◽  
Andy Hawthorn
Keyword(s):  
Gulf Of Mexico ◽  
Real Time ◽  
Case History ◽  
Borehole Seismic ◽  
Seismic Measurements

Pushing the Limits in Offshore Mexico

2021 ◽  
Author(s):  
Hector Hugo Vizcarra Marin ◽  
Alex Ngan ◽  
Roberto Pineda ◽  
Juan Carlos Gomez ◽  
Jose Antonio Becerra
Keyword(s):  
Gulf Of Mexico ◽  
Real Time ◽  
Lessons Learned ◽  
Clear Understanding ◽  
Directional Drilling ◽  
Case Histories ◽  
Control Plan ◽  
Drilling Performance ◽  
Drilling Parameters ◽  
Drilling Engineering

Abstract Given the increased demands on the production of hydrocarbons and cost-effectiveness for the Operator's development wells, the industry is challenged to continually explore new technology and methodology to improve drilling performance and operational efficiency. In this paper, two recent case histories showcase the technology, drilling engineering, and real-time optimization that resulted in record drilling times. The wells are located on shallow water in the Gulf of Mexico, with numerous drilling challenges, which typically resulted in significant Non-Productive Time (NPT). Through close collaboration with the Operator, early planning with a clear understanding of offset wells challenges, well plan that minimize drilling in the Upper Cretaceous "Brecha" Formation were formulated. The well plan was also designed to reduce the risk of stuck pipe while meeting the requirements to penetrate the geological targets laterally to increase the area of contact in the reservoir section. This project encapsulates the successful application of the latest Push-the-Bit Rotary Steerable System (RSS) with borehole enlargement technology through a proven drilling engineering process to optimize the drilling bottomhole assembly, bit selection, drilling parameters, and real-time monitoring & optimization The records drilling times in the two case histories can be replicated and further improved. A list of lessons learned and recommendations for the future wells are discussed. These include the well trajectory planning, directional drilling BHA optimization, directional control plan, drilling parameters to optimize hole cleaning, and downhole shocks & vibrations management during drilling and underreaming operation to increase the drilling performance ultimately. Also, it includes a proposed drilling blueprint to continually push the limit of incremental drilling performance through the use of RSS with hydraulics drilling reamers through the Jurassic-age formations in shallow waters, Gulf of Mexico.

Collisional Orogeny in the Scandinavian Caledonides (COSC): Some preliminary results from drilling of the 2.276 km deep COSC-2 borehole, central Sweden

2021 ◽  
Author(s):  
Christopher Juhlin ◽  
Bjarne Almqvist ◽  
Mark Anderson ◽  
Mark Dopson ◽  
Iwona Klonowska ◽  
...  
Keyword(s):  
High Amplitude ◽  
Granitic Rocks ◽  
Magnetic Data ◽  
Precambrian Basement ◽  
Tectonic Model ◽  
Core Recovery ◽  
Alum Shale ◽  
Borehole Seismic ◽  
Seismic Reflectors ◽  
Seismic Measurements

<p>COSC investigations and drilling activities are focused in the Åre-Mörsil area (Sweden) of central Scandinavia. COSC-2 was drilled with nearly 100% core recovery in 2020 to 2.276 km depth with drilling ongoing from mid-April to early August. Drilling targets for COSC-2 included (1) the highly conductive Alum shale, (2) the Caledonian décollement, the major detachment that separates the Caledonian allochthons from the autochthonous basement of the Fennoscandian Shield, and (3) the strong seismic reflectors in the Precambrian basement.</p><p>Combined seismic, magnetotelluric (MT) and magnetic data were used to site the COSC-2 borehole about 20 km east-southeast of COSC-1. Based on these data it was predicted that the uppermost, tectonic occurrence of Cambrian Alum shale would be penetrated at about 800 m, the main décollement in Alum shale at its stratigraphic level at about 1200 m and the uppermost high amplitude basement reflector at about 1600 m. Paleozoic turbidites and greywackes were expected to be drilled down to 800 m depth. Below this depth, Ordovician limestone and shale with imbricates of Alum shale were interpreted to be present. Directly below the main décollement, magnetite rich Precambrian basement was expected to be encountered with a composition similar to that of magnetic granitic rocks found east of the Caledonian Front. The actual depths of the main contacts turned out to agree very well with the predictions based on the geophysical data. However, the geology below the uppermost occurrence of Alum shale is quite different from the expected model. Alum shale was only clearly encountered as a highly deformed, about 30 m thick unit, starting at about 790 m. Between about 820 and 1200 m, preliminary interpretations are that the rocks mainly consist of Neo-Proterozoic to Early Cambrian tuffs. Further below, Precambrian porphyries are present. The high amplitude reflections within the Precambrian sequence appear to be generated by dolerite sheets with the uppermost top penetrated at about 1600 m. Several deformed sheets of dolerite may be present down to about 1930 m. Below this depth the rocks are again porphyries.</p><p>A preliminary conclusion concerning the tectonic model is that the main décollement is at about 800 m and not at 1200 m. Also the thickness of the lowermost Cambrian/uppermost Neoproterozoic sediments on top of the basement is much greater than expected (hundreds of meters instead of tens of meters) and likely to have been thickened tectonically. Detailed studies are required to assess the actual importance of the “main décollement” and the degree, type and age of deformation in its footwall. We can also conclude that the Precambrian basement is very similar to the Dala porphyries succession that are typically present farther south.</p><p>An extensive set of downhole logging data was acquired directly after drilling. Borehole seismic measurements in 2021 will help to define and correlate seismic boundaries with lithology and structures in the core. Unfortunately, work for describing the geology of the drill core in detail is still on hold due to Covid-19.</p>

No Drilling Surprises Process And The Value Of The Real Time Update, A Case History In Camisea / Peru

2003 ◽  
Author(s):  
M. Frydman ◽  
J. Palacio ◽  
D. Lee ◽  
G. Pidcock ◽  
R. Delgado ◽  
...  
Keyword(s):  
Real Time ◽  
Case History ◽  
The Real ◽  
Time Update

Deepwater Sand Control Technologies Applied for Oil Reserve Estimations: Gulf of Mexico Case History

2015 ◽  
Author(s):  
A. Cuessy-Vázquez ◽  
O. Dávila ◽  
J. A. Martínez ◽  
J. G. Zepeda
Keyword(s):  
Gulf Of Mexico ◽  
Case History ◽  
Sand Control ◽  
Control Technologies

Benefits of Real Time Pressure Monitoring from Surface Read out Devices Case History- Zino Hub

2018 ◽  
Author(s):  
Dennar Linda ◽  
Nanpan Monday ◽  
Aderibigbe Olatubosun ◽  
Emelle Chima ◽  
Ekerendu Onyinyechi ◽  
...  
Keyword(s):  
Real Time ◽  
Case History ◽  
Time Pressure ◽  
Pressure Monitoring

Case History: Successful Wellbore Strengthening Approach in a Depleted and Highly Unconsolidated Sand in Deepwater Gulf of Mexico

2010 ◽  
Vol 25 (04) ◽  
pp. 500-508 ◽  
Author(s):  
J. Darryl Fett ◽  
Frederic Martin ◽  
Claude Dardeau ◽  
Joel Rignol ◽  
Saddok Benaissa ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Case History ◽  
Unconsolidated Sand ◽  
Wellbore Strengthening

Inversion ofPPandPSmulticomponent seismic volumes: A case history from the Gulf of Mexico

2002 ◽  
Author(s):  
Steve Knapp ◽  
Seitel Data ◽  
Tony Medley ◽  
Behtaz Compani ◽  
Richard Uden ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Case History ◽  
Seismic Volumes
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