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Recent Advances in Downhole Fiber Optics Modeling & Analytics: Case Studies
January 5, 2021 at 7:00:00 a.m.
In recent years, the upstream oil and gas industry has witnessed significant breakthroughs in developing and deploying permanent, on-demand, and distributed temperature (DTS) and acoustic (DAS) fiber-optic monitoring systems to optimize well completions and enhance production. Beyond steady advances in hardware, challenges associated with the analysis of distributed optical data are being addressed to enable delivery of value-driven answer solutions and services. Such solutions are often nontrivial and must be driven by scientific workflows in which data-driven models, advanced analytics and most importantly, physics-based models are applied at the right scale to correlate the data to downhole events.
Shaletech: Improving unconventional reservoir performance with geoscience-based development strategies
January 26, 2021 at 7:00:00 a.m.
As efficiencies plateau in North American shale basins, operators require new strategies to lower costs/bbl that go beyond drilling and completion. New technology and workflows can help operators shorten the learning curve to maximize unconventional reservoir performance, early in the project life cycle.
Against the Grain: Three Proppant Delivery Approaches That Buck the Status Quo
January 1, 2021 at 7:00:00 a.m.
Pumping proppant down a wellbore is the easy part.
Ensuring that the precious material does its job is another matter.
A trio of field studies recently presented at the 2020 SPE Annual Technical Conference and Exhibition (ATCE) highlight in different ways how emerging technology and old-fashioned problem solving are moving the industry needle on proppant and conductivity control.
These examples include the adoption of unconventional completion techniques in a conventional oil field in Russia and work to validate the use of small amounts of ceramic proppant in North Dakota’s tight-oil formations. Both studies seek to counter widely held assumptions about proppant conductivity.
A third study details a recently developed chemical coating that Permian Basin producers are applying “on the fly” to sand before it is pumped downhole. The new adhesive material has found a niche in helping operators mitigate the amount of sand that returns to surface during flowback, a sectorwide issue that drives up completion costs and later may spell trouble for artificial lift systems.
Novel Geophone Array Measures Exact Location of Fluid Movement Behind Casing
January 1, 2021 at 7:00:00 a.m.
Historically, acoustic wellbore monitoring is among the primary methods of detecting fluid movement behind the casing. However, analysis of the complex acoustic environment in the wellbore can be challenging. A standard hydrophone noise tool is unable to measure flow directions (vertical and horizontal) and cannot detect low flow, low-pressure sporadic events, or multiple sources. The complete paper discusses a geophone array, including four, three-component geophones deployed by wireline, that provides a solution for this problem by creating a 3D map of the acoustic environment.
Fracturing With Height Control Extends the Life of Mature Reservoirs in the Pannonian Basin
January 1, 2021 at 7:00:00 a.m.
Hydraulic proppant fracturing is an effective tool in mature, low-permeability reservoirs found in the Pannonian Basin. However, for wells already producing with high water cut, even a small fracture extension into a water-bearing zone offsets the gains in hydrocarbon production. Fracture-geometry-control (FGC) techniques limit increases in water cut. The complete paper describes the first implementation of a solution to control fracture height for conventional wells in the Pannonian Basin. An integrated engineering approach was applied, including a new proppant-transport model to predict fracture geometry improvement using the FGC solution.
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