Wellbore instability is one of the major problems that hamper the drilling speed in Halfaya Oilfield. Comprehensive analysis of geological and engineering data indicates that Halfaya Oilfield features fractured shale in the Nahr Umr Formation. Complex accidents such as wellbore collapse and sticking emerged frequently in this formation. Tests and theoretical analysis revealed that wellbore inst...

Bioassays for carcinogenicity of various primary processing products (crude oils or tars) and commercial products obtained from Estorian oil shale have been carried out since 1951. The products (undiluted or diluted) were painted twice weekly 50 times on the interscapular area of the skin of random-bred or CC57Br mice. The products processed at high temperatures have a higher carcinogenic activ...

The oil shale resources are very abundant with its reserve three times as much as world’s proven oil reserve. However, by the limitations of traditional technology and mining methods, the development of oil shale technology is restricted to a great extent. Now researchers are studying the in-situ retorting technology through heating the underground oil shale directly. Then the released oil and ...

We quantify the effect of a significant technological innovation, shale oil development, on asset prices. Using stock price changes on major news announcement days allows us to link aggregate stock price changes to shale development activity as well as other oil supply shocks. We exploit cross-sectional variation in industry portfolio returns on announcement days to construct a shale mimicking ...

SUMMARY Poland has some of Europe's most favorable infrastructure and public support for shale development. The Baltic Basin in northern Poland remains the most prospective region with a relatively simple structural setting. The Podlasie and Lublin basins also have potential but are structurally complex, with closely spaced faults which may limit horizontal shale drilling. A fourth area, the Fo...

Oil Shale One alternative source of energy is the extraction of the organic components of oil shale to yield oil and gas. shale deposits occur throughout the United States.. The release of the energy yielding organic fraction from oil shale has been brought about by retorting the oil shale at temperatures above 500° C and distillating the organic material. in the form of spent oil shale ash. A ...

In shale, liquid hydrocarbons are accumulated mainly in nanometer-scale pores or fractures, so the pore types and PSDs (pore size distributions) play a major role in the shale oil occurrence (free or absorbed state), amount of oil, and flow features. The pore types and PSDs of marine shale have been well studied; however, research on lacustrine shale is rare, especially for shale in the oil gen...

Concern has been raised in the scientific literature about the environmental implications of extracting natural gas from deep shale formations, and published studies suggest that shale gas development may affect local groundwater quality. The potential for surface water quality degradation has been discussed in prior work, although no empirical analysis of this issue has been published. The pot...

This study considers the flux of radioactivity in flowback fluid from shale gas development in three areas: the Carboniferous, Bowland Shale, UK; the Silurian Shale, Poland; and the Carboniferous Barnett Shale, USA. The radioactive flux from these basins was estimated, given estimates of the number of wells developed or to be developed, the flowback volume per well and the concentration of K (p...