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Africa (Sub-Sahara) Tullow Oil announced in mid-August that first oil has flowed from the Tweneboa, Enyenra, and Ntomme (TEN) fields offshore Ghana, which was on time and on budget for the project's development plan approved by the government in May 2013. The company expects oil output to ramp up gradually through the rest of the year toward a production facility capacity of 80,000 B/D. Tullow is the operator of the TEN fields with a 47.18% stake. Its joint-venture partners are Anadarko (17%), Kosmos Energy (17%), Ghana National Petroleum Corporation (15%), and PetroSA (3.82%). Asia Pacific Rosneft has made a discovery at the PLDD well in the Wild Orchid gas condensate field in Block 06.1 of the Nam Con Son Basin offshore Vietnam. The discovery is being evaluated for the volume of reserves and commercial attractiveness, and there is a potential synergy with the nearby Rosneft-operated Lan Tay production platform, the company said.
Africa (Sub-Sahara) San Leon Energy reported encouraging performance from its OML 18 field in Nigeria. Reperforation of an oil well increased gross field production to approximately 61,000 B/D before output was temporarily scaled back to 53,000 B/D for a shut-in, upgrade, and workover of the well. A number of other field wells will be reperforated in coming months, the company said. San Leon holds a 9.72% interest in the field, which is operated by Eroton (35%). Nigerian National Petroleum Corp. holds the remaining stake. FAR said that drilling has begun on the SNE-5 appraisal well offshore Senegal. The well and the following SNE-6 well will evaluate the upper SNE reservoir units' connectivity and deliverability by oil flow testing that will include interference tests.
In the complete paper, the authors revisit fundamental concepts of reservoir simulation in unconventional reservoirs and summarize several examples that form part of an archive of lessons learned. Proper lateral and vertical well spacing is critical for efficient development of unconventional reservoirs. Much research has focused on lateral well spacing but little on vertical spacing, which is challenging for stacked-bench plays such as the Permian Basin. Knowing which horizon crude oil flows from and in what proportions has been a major challenge for shale producers. Increasingly, they are turning to new technology to find the answer.
Norwegian operator DNO announced a two-thirds increase in production from the Peshkabir field in the Tawke license in the Kurdistan region of Iraq to 25,000 BOPD following completion of the Peshkabir-4 well-testing program. The well has been placed on production at a rate of 10,000 BOPD through temporary, capacity-constrained test facilities, with the oil being trucked to Fish Khabur for export. The Peshkabir-4 well was designed as a high-angle well to assess the central part of the structure 4 km west of the Peshkabir-3 well and drilled to a measured depth of 3525 m, including an 1150-m extended-reach reservoir section. A total of 11 zones were tested and flowed between 1,500 and 7,000 BOPD per zone. DNO operates and has a 75% interest in the Tawke license, which contains the Tawke and Peshkabir fields, with partner Genel Energy holding the remaining 25%.
JPT Technology Minute Poll: To Which of the Top Five UN Sustainability Development Goals Do You Think the Oil and Gas Industry Will Contribute the Most? The papers identified in the article cover sustainable development of oil and gas resources in various aspects. Flaring and emissions challenges have recently made news headlines around the world. The goal of this article is to engage you with this important topic by presenting a selection of recent SPE papers which address these challenges through various approaches. Operators face a dilemma in balancing the need for mud weight (MW) to remain below the fracture gradient to avoid losses, while also providing sufficient density to block influxes into the well. JPT Technology Minute Poll: Which Technology Would You Choose for Offshore Compression?
The complete paper describes the development of, and summarizes the major changes and additions to, the Environmental Management in the Oil and Gas Industry guide. During the optimization process, the Castilla field became the model of management strategies for the rest of the fields in the company portfolio.
A well was drilled into a prospective unconventional mudstone play offshore Norway. Two of five coring runs were successful while the rest yielded little to no core recovery. Subsequent investigation of the core substantiated that the coring issues largely had natural causes. Results to date are compared with previous performance in the Gulf of Thailand (GoT). Reservoirs consisting of heterogeneous carbonates and shaly sands pose formation evaluation challenges for conventional logging-while-drilling (LWD) measurements.
Africa (Sub-Sahara) BP and Kosmos Energy discovered 30 m of net gas pay in good-quality Albian reservoir in the Greater Tortue development area, offshore Senegal. The Greater Tortue Ahmeyim-1 was drilled to a TD of 4884 m in 2500 m of water on the eastern anticline within the unit development area. Other partners are SMPHM and Petrosen. Invictus Energy said results of independent estimates strongly support the possible existence of 1.3 billion BOE at its Cahorra Bassa Basin project in the Muzarabani prospective area of Zimbabwe. Estimates are for total prospective resource of 9.25 Tcf of gas plus 294 million bbl of conventional gas and condensate. Eni confirmed 650 million bbl of oil in place with its Agogo-2 appraisal well in Block 5/06, offshore Angola. The well was drilled to total depth of 3949 m in 1700 m of water, where it encountered 58 m of 31 API oil.
The complete paper reviews the results of gas hydrate engineering and production testing studies associated with northern Canada and Alaska. Automated image-processing algorithms can improve the quality and speed in classifying the morphology of heterogeneous carbonate rock. Several commercial products have produced petrophysical properties from 2D images and, to a lesser extent, from 3D images. The complete paper provides an approach using machine-learning and sequence-mining algorithms for predicting and classifying the next operation based on textual descriptions. Imagine the time when we are no longer concerned about the digital-transformation issues we face today, such as data availability, security, and many others. This would be the time when companies make the best out of digital infrastructure. This era might be here sooner than expected. The complete paper describes the hurdles that have prevented single-trip installation of upper and lower completions in the complex world of subsea and deepwater applications and examines the processes, technologies, and risk-mitigation steps that took a concept from pilot to successful deployment. Specifically targeting ingrained thinking, the selected papers demonstrate the game-changing results that can be achieved even when targeting long-established norms. They demonstrate everything that our industry should be proud of and what we strive for. With reduced new unconventional well activity, practices such as frac-hit mitigation—pressurization of parent wells during child-well fracture stimulation—have become increasingly important to reduce parent-well proppant cleanouts as well as to maximize production from both parent and child wells. Sand control has evolved over the years; however, the fundamentals of screen sizing have not changed.
Seeking to become an energy producer, the Middle Eastern country is exploring for natural gas in the Black Sea and the Eastern Mediterranean Sea. The complete paper discusses the successful execution of the first offshore multilateral well completed for multistage high-pressure proppant stimulation, according to the authors, in the Black Sea offshore Romania.