Applications of Emerging Well Testing Technology in South Texas Gas Reservoirs

1989 ◽  
Author(s):  
T.A. Juranek ◽  
M.S. Pearcy
Keyword(s):  
South Texas ◽  
Well Testing ◽  
Gas Reservoirs ◽  
Testing Technology

Minifracture Analyses and Stimulation Treatment Results for C02-Energized Fracturing Fluids in South Texas Gas Reservoirs

1990 ◽  
Author(s):  
T.A. Juranek ◽  
M.T. Llewellyn ◽  
G.P. Drescher ◽  
H.C. Tan ◽  
J.M. McGowen
Keyword(s):  
South Texas ◽  
Treatment Results ◽  
Gas Reservoirs ◽  
Fracturing Fluids

Analytical Treatment of Pressure-Transient Solutions for Gas Wells With Wellbore Storage and Skin Effects by the Green's Functions Method

SPE Journal ◽  
2016 ◽  
Vol 21 (05) ◽  
pp. 1858-1869 ◽  
Author(s):  
Emilio P. Sousa ◽  
Abelardo B. Barreto ◽  
Alvaro M. Peres
Keyword(s):  
Green's Functions ◽  
Green’S Functions ◽  
Approximate Solutions ◽  
Test Problems ◽  
Well Testing ◽  
Well Test ◽  
Gas Reservoirs ◽  
Analytical Treatment ◽  
Wellbore Storage ◽  
Diffusivity Equation

Summary Even when written in terms of a pseudopressure function, the diffusivity equation for flow of gases through porous media is, rigorously speaking, nonlinear because the viscosity-compressibility product is pseudopressure-dependent. However, several techniques and analysis procedures neglect such nonlinearity. A new methodology for constructing solutions for gas reservoirs through the Green's functions (GF) technique was recently proposed in the literature. Such methodology handles the viscosity-compressibility product variation rigorously, and it was applied to solve several gas-well test problems successfully. However, wellbore storage and skin effects were not considered yet by this new approach. In this work, the GF technique is applied to obtain a new solution for an infinite, homogeneous, isotropic gas reservoir being produced through a single vertical well represented by a line-source with wellbore storage and skin. The solution, however, does not consider non-Darcy flow effects. Even though the wellbore storage introduces a new nonlinearity to an already nonlinear problem, this work presents two accurate approximate solutions compared with the results from a commercial numerical well-testing simulator. This work also shows that the wellbore pseudopressure dimensionless solution is a function of the correlating groups CDexp(2S) and tD/CD, exactly similar to the way that wellbore dimensionless liquid solutions are. Liquid and gas dimensionless solutions under these correlating groups are not equal, though.

Well Testing of Tight Gas Reservoirs

2006 ◽  
Author(s):  
Juan P. Garcia ◽  
Mehran Pooladi-Darvish ◽  
Frank Brunner ◽  
Marty Santo ◽  
Louis Mattar
Keyword(s):  
Well Testing ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs

Methodology of Effective Lateral Placement for Underbalanced Coiled Tubing Drilling Wells

2021 ◽  
Author(s):  
Azly Abdul Aziz ◽  
Ferney Moreno Sierra ◽  
Nawaf Aldossary
Keyword(s):  
Depositional Environments ◽  
Productivity Index ◽  
Well Testing ◽  
Multiple Sources ◽  
Gas Reservoirs ◽  
Past Performance ◽  
Placement Decisions ◽  
Coiled Tubing ◽  
In Series ◽  
Pressure Transient Test

Abstract This paper describes a methodology that has been developed to maximize lateral placement in productive reservoir intervals during underbalanced coiled tubing drilling (UBCTD) operations. UBCTD has emerged as an effective and economically viable development solution for exploiting reserves in mature gas reservoirs. In some cases, it can be a suitable solution to develop reserves in more geologically complex and heterogonous reservoirs over the conventional drilling and stimulation techniques. The methodology integrates big surface and subsurface data from multiple sources in multiple formats in real to near real-time that are normally acquired during UBCTD drilling operations. The multiple sources of data include subsurface geology, wellsite biosteering, reservoir influx, well testing and drilling, and can provide important information about the reservoirs encountered. With the aid of data analytics and an advanced visualization tool, the data is translated into in series of engineering plots that enable easier identification of productive intervals and more informed as well as efficient lateral placement decisions. This methodology has proven superior to the conventional instantaneous Productivity Index (PI) approach that is commonly used for UBCTD lateral placement. The methodology has been tested with good success in a number of recently drilled UBCTD wells in geologically complex depositional environments across carbonates and clastic reservoirs. Post flowback and pressure transient test analyses have shown significant improvement in the well deliver abilities and effective lateral lengths. Past performance from wells drilled using the PI method will be compared with wells drilled with this method.

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