Pre-fracture Treatment of Coal Seams for Fracture Conductivity Enhancement in Hydro Fracturing of CBM Wells and Coal Fines Mitigation in Multilateral CBM Wells through Wettability Alteration of Coal Fines - A Laboratory Study

2012 ◽  
Author(s):  
Ajay Kumar ◽  
Nagendra Yadav ◽  
Y.R.L. Rao ◽  
C.P. Singhal ◽  
Ajit Kumar
Keyword(s):  
Laboratory Study ◽  
Wettability Alteration ◽  
Fracture Treatment ◽  
Coal Seams ◽  
Fracture Conductivity ◽  
Conductivity Enhancement ◽  
Coal Fines

Analytical Modeling of Non-Darcy Flow-Induced Conductivity Damage in Propped Hydraulic Fractures

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
M. K. Rahman ◽  
M. M. Salim ◽  
M. M. Rahman
Keyword(s):  
Flow Rate ◽  
Production Performance ◽  
Darcy Flow ◽  
Low Flow ◽  
Hydraulic Fractures ◽  
Fracture Treatment ◽  
Fracture Conductivity ◽  
Flow Effect ◽  
Low Flow Rate ◽  
Production Prediction

This paper presents a simple analytical method to model the non-Darcy flow effect on the production performance of hydraulically fractured wells by modifying the fracture conductivity. The method is suitable to conveniently incorporate the non-Darcy flow effect in a production prediction model usually used for fracture treatment design and optimization. The method is validated against published information of field productivity and production prediction by other complex methods. The method is then used to demonstrate that the non-Darcy effect is one of the major sources for the loss of fracture conductivity, even at a low flow rate well, and hence the source for discrepancy between the predicted and actual productivities. Finally, the implication of neglecting the non-Darcy effect in fracture treatment optimization is also investigated, emphasizing the need to incorporate this effect even for low flow rate wells.

Changes in reservoir properties from injection of supercritical CO2 into coal seams — A laboratory study

2010 ◽  
Vol 82 (3-4) ◽  
pp. 269-279 ◽  
Author(s):  
P. Massarotto ◽  
S.D. Golding ◽  
J.-S. Bae ◽  
R. Iyer ◽  
V. Rudolph
Keyword(s):  
Laboratory Study ◽  
Supercritical Co2 ◽  
Coal Seams ◽  
Reservoir Properties

New Treatment Method for Enhancing Propped Fracture Conductivity -- A Laboratory Study

2013 ◽  
Author(s):  
P. D. Nguyen ◽  
R. D. Rickman ◽  
J. D Weaver ◽  
T. Z. Vonk ◽  
R. A. Loghry
Keyword(s):  
Laboratory Study ◽  
Treatment Method ◽  
Fracture Conductivity ◽  
New Treatment

Laboratory and in-situ analysis of comet dust

1988 ◽  
Vol 46 ◽  
pp. 8-9
Author(s):  
D.E. Brownlee ◽  
A.L. Albee
Keyword(s):  
Electron Microscopy ◽  
Solar System ◽  
Laboratory Study ◽  
Isotopic Analysis ◽  
Building Blocks ◽  
Sem Analysis ◽  
Early Solar System ◽  
Cometary Material ◽  
Comet Dust

Comets are primitive, kilometer-sized bodies that formed in the outer regions of the solar system. Composed of ice and dust, comets are generally believed to be relic building blocks of the outer solar system that have been preserved at cryogenic temperatures since the formation of the Sun and planets. The analysis of cometary material is particularly important because the properties of cometary material provide direct information on the processes and environments that formed and influenced solid matter both in the early solar system and in the interstellar environments that preceded it.The first direct analyses of proven comet dust were made during the Soviet and European spacecraft encounters with Comet Halley in 1986. These missions carried time-of-flight mass spectrometers that measured mass spectra of individual micron and smaller particles. The Halley measurements were semi-quantitative but they showed that comet dust is a complex fine-grained mixture of silicates and organic material. A full understanding of comet dust will require detailed morphological, mineralogical, elemental and isotopic analysis at the finest possible scale. Electron microscopy and related microbeam techniques will play key roles in the analysis. The present and future of electron microscopy of comet samples involves laboratory study of micrometeorites collected in the stratosphere, in-situ SEM analysis of particles collected at a comet and laboratory study of samples collected from a comet and returned to the Earth for detailed study.

Sign in / Sign up

Export Citation Format

Share Document