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This paper describes the analysis of sidetracks drilled in an open hole by an annular ledge formation method with a downhole motor in multilateral wells. Combined with advances in whipstock and milling technologies, digital technologies are enabling operators to plan and conduct sidetracking operations with improved flexibility, precision, and efficiency.
This paper describes the analysis of sidetracks drilled in an open hole by an annular ledge formation method with a downhole motor in multilateral wells. This paper shows how high-frequency, real-time drilling data from wired drillpipe has helped optimization of drilling performance and achievement of additional improvements in the New Mexico Delaware Basin. This paper presents dynamic simulations, prototype testing, and field-test results of a BHA component that isolates the upper part of the BHA from HFTO. This paper examines multiple factors that can affect the severity of stick/slip and measures their actual effect. A new rotary-steerable system (RSS) was designed to give geometrically greater dogleg-severity (DLS) capability while still being able to withstand the increased bending stresses.
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. This paper details the design and execution of what the authors say they believe is the first successful frac-pack operation in a previously gravel-packed well. The evolution of hydraulic fracturing is a long and circuitous one that deserves examination. Engineering and completions leaders from Liberty Oilfield Services did just that, authoring a paper that encapsulates the high points in the development of the groundbreaking completions practice. Producers in Texas have claimed an economic victory with their transition to local sands that they once avoided using in horizontal wells due to their low-quality.
The amount of uncertainty related to directional drilling makes accurate drilling challenging, leaving much to human know-how and interpretation. Additionally, few path-planning methods in the literature consider the directional steering tool being used. This paper examines multiple factors that can affect the severity of stick/slip and measures their actual effect. The advent of the rotary-steerable system (RSS) introduced an efficient way to drill both current and future wells. However, current tools still fail to replace positive displacement motors (PDMs).
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.
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?
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.
The Dutch major said it has filed an application for drilling operations in the North Slope as part of an effort to help attract buyers to 18 leases it purchased rights to in 2012. The area has a potential for up to 11.8 million bbl of recoverable oil reserves. The program aims to keep oil flowing in the Trans-Alaska Pipeline System, which has seen dwindling throughput since 1988. Although polymer flooding has become a promising enhanced oil recovery (EOR) technique, no field tests have been performed to date in Alaska’s underdeveloped heavy-oil reservoirs. Most of ConocoPhillips’ oil and gas production by the end of the next decade will come from its unconventional operations.