At the present time, more than 9,000 offshore platforms are in service worldwide, operating in water depths ranging from 10 ft to greater than 5,000 ft. Topside payloads range from 5 to 50,000 tons, producing oil, gas, or both. A vast array of production systems is available today (see Figure 1). The concepts range from fixed platforms to subsea compliant and floating systems. In 1859, Col. Edwin Drake drilled and completed the first known oil well near a small town in Pennsylvania, U.S.A.
The Finn-Shurley field produces petroleum from the Upper Cretaceous Turner Sandstone of the Powder River Basin. The Turner is a member of the Carlile and is overlain by the Sage Breaks and underlain by the Pool Creek members of the Carlile. The Turner is interpreted to be a shallow marine shelf sandstone deposited along the eastern side of the Western Interior Cretaceous Seaway. Sand-shelf-bar orientation across the field is roughly east-west. Trapping occurs where sandstone beds get shalier up-dip. The field is located along the shallow east margin of the Powder River Basin south of the Clareton lineament.
Three to four coarsening upward cycles are present in the Turner in the field. Most of the production in Finn-Shurely comes from the lower two cycles. Each cycle consists of burrowed to bioturbated, heterolithic mudstones and sandstones coarsening upwards into fine-grained laminated to burrowed sandstones. Trace fossil present fall into the shelf Cruziana ichnofacies. The sandstones are largely litharenites. Porosities range from 11-17% and permeabilities range from 0.06 to 0.5 md. Source rock analysis of the Turner shales indicate Ro values averaging 0.63 and Tmax values of 433°C. Source beds for the oil and gas in the Turner are thought to be the Mowry and Niobrara formations. The low thermal maturity suggests lateral migration of oil into the stratigraphic trap.
The field extends over an area roughly circular in shape of ~65 square miles. Productive depths across the field are 4450 to 5700 ft. First production is reported as 1965 and cumulative production from ~750 vertical wells is 23.6 MMBO and 38.9 BCFG. Cumulative gas oil ratio is 1688 cu ft gas per barrel oil. Average production per well is approximately 31.5 MBO and 52 MMCFG. Horizontal drilling activity in the field area has recently commenced. Although the production is fair to marginal, the field provides an excellent example of trapping style as well as a depositional model for Turner Sandstone elsewhere in the Powder River Basin. Recent drilling in the deeper overpressured parts of the Powder River Basin has encountered excellent production from the Turner (> 1,000 bbls oil equivalent per well).
Finn-Shurley Field is part of a continuous accumulation within the Turner Sandstone in the Powder River Basin. Distinct oil-water contacts are not present in the field area. The accumulation is underpressured and regarded as unconventional.
Operators are increasingly using existing offshore infrastructure for asset life extension, and developing new marginal stranded fields rather than develop new large greenfields. Subsea processing is an enabling technology in this goal. A cybersecurity director outlines the steps needed to adopt a risk-based cybersecurity program. He cautions that in many cases, process control systems’ confidentiality is mistakenly viewed as a lower priority than IT systems’. AUVs aren’t limited to inspections and pipeline surveys.
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Noble’s first row of wells in its massive Mustang project is helping increase the operator’s DJ Basin output, and similar results are soon expected in the Delaware Basin. Devon Energy will be getting simpler and smaller by selling two no-growth assets—gas acreage in the Barnett Shale in Texas and oil sand operations in Canada. Its future is staked on growing oil production in the Permian’s Delaware Basin and three other unconventional oil plays. The Oklahoma City independent has a new-look portfolio and new operational and financial priorities. And now it has enlisted an energy research firm to leverage advanced analytics and machine learning to help get the most out of its assets.
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Is the Cloud Mature Enough for High-Performance Computing? Data volumes are growing at an exponential rate. How can high-performance computing solutions help operators manage these volumes? Will faster, stronger processors and cloud computing solutions be the answer? This paper describes interpretation results of a 4D seismic-monitoring program in a challenging Middle East carbonate reservoir.
BP and partners have sanctioned the Azeri Central East project, the next stage of development of the giant Azeri-Chirag-Deepwater Gunashli oilfield complex in the Azerbaijan sector of the Caspian Sea. The vessel will produce approximately 2.5 mtpa of LNG for the project, which is expected to deliver first gas in 2022. A newly launched JIP aims to bridge the BSEE and API frameworks and achieve industry consensus on the analysis and inspection data required to assess the feasibility of an extended service life. Current production from the phase is 400 MMcf/D and expected to peak at 700 MMcf/D. A third phase also is slated to come on stream this year.
Megaprojects have come to define many of the world’s new resource projects but they are also a testament to the awesome engineering capabilities of the oil and gas industry. Find out who took home this year’s honors. Are Deepwater Projects Due for a Revival? The oil price downturn spawned a lull in deepwater enthusiasm, but better project execution and reduced project lead times have helped operators achieve lower costs and better returns. What does the landscape for deep water look like in the near term?