Revisit of Well Function Approximation and An Easy Graphical Curve Matching Technique for Theis' Solution

Ground Water ◽  
2003 ◽  
Vol 41 (3) ◽  
pp. 387-390 ◽  
Author(s):  
Pham Huy Giao
Keyword(s):  
Function Approximation ◽  
Curve Matching ◽  
Matching Technique ◽  
Theis Solution ◽  
Well Function

scholarly journals Comparative Hydrological and Geoelectrical Study on the Quaternary Aquifer in the Deltas of Wadi Badaa and Ghweiba, El Ain El Sukhna Area, Northwest Suez Gulf, Egypt

2010 ◽  
Vol 2010 ◽  
pp. 1-15 ◽  
Author(s):  
M. M. El Osta ◽  
A. El. El Sheikh ◽  
M. S. Barseem
Keyword(s):  
Pumping Test ◽  
Curve Matching ◽  
Study Region ◽  
Quaternary Aquifer ◽  
Transverse Resistance ◽  
Priority Map ◽  
Water Wells ◽  
Matching Technique ◽  
Promising Area ◽  
Western Portion

El Ain El Sukhna area was selected in the last ten years to initiate many governmental and investmental programs. The different activities in that area depend mainly on the groundwater of the Quaternary aquifer, which forms the main water bearing strata. In the present work, twenty one geoelctrical soundings using the Schlumberger configuration are carried out at selected sites especially in missing parts from wells to delineate the groundwater setting in such sites. Eight of them are conducted in the close vicinity of water wells, where lithologs and pumping test data of these wells are available to relate hydrologic and geoelctric measurements. The pumping tests data are analyzed by using AQTESOLV program and the geolectrical sounding data were interpreted by partial curve matching technique to obtain the initial parameters. The results indicated that, the transmissivity is found to be closely related with transverse resistance and the hydraulic conductivity with average transverse resistivity, while the salinity is inversely related with resistivity. Finally, priority map for drilling water wells is constructed to make the results more illustrative and useful for decision maker. The promising area for drilling is located at the western portion of the study region.

Characterizing Natural-Fracture Permeability From Mud-Loss Data

SPE Journal ◽  
2010 ◽  
Vol 16 (01) ◽  
pp. 111-114 ◽  
Author(s):  
Jinsong Huang ◽  
D. V. Griffiths ◽  
Sau-Wai Wong
Keyword(s):  
Direct Method ◽  
Transient State ◽  
Natural Fracture ◽  
Curve Matching ◽  
Fracture Permeability ◽  
Type Curves ◽  
Cubic Equation ◽  
Matching Technique ◽  
Mud Loss ◽  
Insight Into

Summary Liétard et al. (1999, 2002) have provided important insight into the mechanism and prediction of transient-state radial mud invasion in the near-wellbore region. They provided type curves describing mud-loss volume vs. time that allow the hydraulic width of natural fractures to be estimated through a curve-matching technique. This paper describes a simpler and more direct method for estimating the hydraulic width by the solution of a cubic equation, with input parameters given by the well radius rw, the overpressure ratio Δp/τy, and the maximum mud loss volume (Vm)max.

FIDDLE. Simultaneous Indexing and Structure Solution from Powder Diffraction Data using a Genetic Algorithm and Correlation Functions

2019 ◽  
Author(s):  
Carmen Guguta ◽  
Jan M.M. Smits ◽  
Rene de Gelder
Keyword(s):  
Genetic Algorithm ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Correlation Functions ◽  
Cross Correlation ◽  
Simultaneous Optimization ◽  
Powder Diffraction Data ◽  
Structure Solution ◽  
Matching Technique

A method for the determination of crystal structures from powder diffraction data is presented that circumvents the difficulties associated with separate indexing. For the simultaneous optimization of the parameters that describe a crystal structure a genetic algorithm is used together with a pattern matching technique based on auto and cross correlation functions.<br>

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