Shale oil and gas resources are abundant in Songliao Basin, shale reservoirs tend to have certain permeability anisotropy with different pore or laminar structures directions, there is no experimental analysis of reservoir sensitivity. To solve this problem, paper tests the by pulse decay method, obtains variation curve effective stress, analyzes data. The results show that basin basically 10 -...

This study demonstrates the reservoir investigation of Cretaceous Lower Goru “C” sand interval using exploratory well data from middle Indus basin Sindh. The petrophysical parameters including volume shale, effective porosity, and water saturation investigated were calculated. shale calculation results in 30–35% non-clean (shale) lithology, which is high as compared to Sawan-01 Sawan-08 wells. ...

About the Cover: Black carbon (BC) containing particles have an important role to play in climate change; directly heating through absorption of radiation, and/or indirectly cooling through the seeding of clouds. New research in this issue, using a mobile laboratory indicates that gasoline powered cars may produce more BC than previously considered. Transmission electron microscopy background i...

The purpose of this study is to characterize the relationship between organic material and thermal maturity during the process of evaluation of hydrocarbon potential. Samples studied include Miocene high volatile bituminous coal and coaly shale collected from outcrops and exploration wells in Hsinchu-Miaoli area, NW Taiwan, density centrifuge separated macerals, bituminous coal and anthracite f...

Production of low-viscosity liquids (including condensates) from tight reservoirs (such as shales) is severely restricted by the ultra low-permeability of such formations, limiting production to a very small fraction (usually less than 5 percent) of the liquids-in-place. In this study, which is part of a wider investigation, we evaluate by means of numerical simulation several possible strategi...

Channelized reservoirs often show multi-scale architectures such as large-scale channel belts, middle-scale single channels and small-scale channel infill facies. These architectural elements are defined between bounding surfaces. Along these hierarchical bounding surfaces, thin shale drapes may be present as flow barriers that compartmentalize the reservoirs. Since the distribution of shale dr...

One of the primary public concerns with new development of shale and other unconventional gas resources is potential contamination of shallow groundwater with natural gas (largely methane). Natural gas contamination of shallow groundwater can result from leaky gas production wellbores (e.g. Stein et al., 2003; Van Stempvoort et al., 2005). However, there is also concern that hydraulic fracturin...

Estimates of technically recoverable shale gas resources remain highly uncertain, even in regions with a relatively long history of shale gas production. This paper examines the reasons for these uncertainties, focussing in particular on the methods used to derive resource estimates. Such estimates can be based upon the extrapolation of previous production experience in developed areas, or from...

This paper presents a modeling approach for three-dimensional simulation of hydraulic fracturing of jointed rock. The base for a successful computer based simulation for productive use is the ability to calculate the fractured volume with sufficient accuracy and efficiency. Especially in cases three dimensional effects have to be taken into account, the common commercial software tools in oil a...

The casing deformation problems are presented over 36 wells (among 112 horizontal wells by 2016) during fracturing processes in Weiyuan-Changning shale gas play in China.1 Subsequent tools could be blocked in the wellbore.2–4 The segments with serious deformation had to be abandoned before completing fracturing operations.5 The casing deformation issues make a great influence on production of s...