In recent years, hydraulic fracturing and horizontal drilling have been applied to extract crude oil from tight reservoirs, including the Bakken formation. There is growing interest in understanding the greenhouse gas (GHG) emissions associated with the development of tight oil. We conducted a life cycle assessment of Bakken crude using data from operations throughout the supply chain, includin...

In this paper we present a review of the application of two types of magnetic sensors-fluxgate magnetometers and nuclear magnetic resonance (NMR) sensors-in the oil/gas industry. These magnetic sensors play a critical role in drilling wells safely, accurately and efficiently into a target reservoir zone by providing directional data of the well and acquiring information about the surrounding ge...

We present new instruments for solving the "best site selection" problem in a sequential setting, and we propose a comparison with classical non-sequential methods based on the Value of Information. The main motivation is selection of drilling sites in an oil and gas field, when there are several correlated prospects. We discuss the properties and the methods required for designing our optimal ...

There is concern that offshore oil platforms off Southern California may be contributing to environmental contaminants accumulated by marine fishes. To examine this possibility, 18 kelp bass (Paralabrax clathratus Girard, 1854), 80 kelp rockfish (Sebastes atrovirens Jordan and Gilbert, 1880), and 98 Pacific sanddab (Citharichthys sordidus Girard, 1854) were collected from five offshore oil plat...

Rheology is one of the key drilling fluid properties for controlling sag. Yet, the current understanding of the sag-rheology relationship is limited to a few general guidelines for reducing sag in the field. This paper reviews current understanding of sag and describes the initial stage of work aimed at finding a correlation between fluid rheology and sag performance under laboratory conditions...

SEM-EDS based automated mineralogy is widely used in the geological industries in order to study mineral deposits, for mine planning and for oil and gas reservoir analysis. It is also being increasingly used in academic settings to study phase distributions and the compositions of bulk samples. Several solutions integrating SEM and EDS hardware with dedicated software are available on the marke...

Recent resource assessment studies of eastern Kentucky oil shales have establlshed that this resource is a potential economic synthetic fuel feedstock (1). Extensive geochemical characterization of this resource has been carr ied out by the Institute for Mining and Mlnerals Research (University of Kentucky) with support f rom the Commonwealth of Kentucky Energy Cabinet, the U. S. Department of ...

The primary use of technical computing in the oil and gas industries is for seismic imaging of the earth’s subsurface, driven by the business need for making wellinformed drilling decisions during petroleum exploration and production. Since each oil/gas well in exploration areas costs several tens of millions of dollars, producing high-quality seismic images in a reasonable time can significant...

Problems such as well loss and collapses in deep shale gas drilling are most often due to the development of cracks formation, resulting significant leaks fluid, sticking burrowing tools, other engineering accidents. In addition, horizontal sections wells very long issues friction, rock transport, formation contamination loom large. As a result, performance fluids directly affects efficiency, a...

The recent development of tight oil reservoirs has led to an increase in oil production in the past several years due to the progress in horizontal drilling and hydraulic fracturing. However, the expected oil recovery factor from these reservoirs is still very low. CO2-based enhanced oil recovery is a suitable solution to improve the recovery. One challenge of the estimation of the recovery is ...