Advanced Fractured Well Diagnostics For Production Data Analysis

Abstract

TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractNew analysis procedures are presented for analyzing the production data of fractured wells in low permeability reservoirs to quantify estimates of the reservoir effective permeability, effective fracture halflength, and average fracture conductivity. The rate-transient based analyses reported in this paper have been used to analyze the production performance of over 200 wells in low permeability reservoirs in North America.Direct comparisons of the fracture properties resulting from conventional crosslinked fluid fractures and low viscosity base fluid ("Water-Frac") treatments in direct offset wells clearly demonstrates that more effective fractures are created in low-permeability reservoirs using the higher viscosity fracturing fluids and large proppant volumes to achieve higher conductivity fractures with greater effective halflengths than are achieved with "Water-Fracs" with little or no proppant.

Integration of microseismic and other post-fracture surveillance with production analysis: A tight gas study

“…bilinear, linear, elliptical, radial and boundary-dominated flow) is transformed onto specialty plots (using dimensional variables) in such a way that the resulting data trend is linear from which reservoir and stimulation information may be extracted. The straight-line approach has been used by Economides et al (1994), Wattenbarger et al (1998), Poe et al (1999), and Hager and Jones (2001) for analyzing transient flow; the flowing material balance (FMB) method is an example of a straight-line method that is applicable to the boundary-dominated flow regime and may be used to obtain hydrocarbon-in-place estimates (Palacio and Blasingame, 1993;Doublet et al, 1994;Mattar and McNeil, 1997;Agarwal et al, 1999;Mattar and Anderson, 2005). Very recently, a straight-line method was introduced to analyze the elliptical flow regime (Cheng et al, 2009).…”

“…Straight-line techniques for analyzing transient production data associated with vertical, hydraulically-fractured wells have also been discussed in the literature (see Economides et al, 1994;Poe et al, 1999;Hager and Jones, 2001;Cheng et al, 2009). Application of these techniques for analyzing production data associated with multi-fractured horizontal wells has only been briefly reviewed.…”

Rate-transient analysis of 2-phase (gas + water) CBM wells

“…Use of this form of rate transient analysis is not newdseveral authors have applied it to conventional or tight-gas reservoirs (Poe et al, 1999;Hager and Jones, 2001;Cheng et al, 2009). As discussed in previous works, hydraulically-fractured vertical wells (e.g.…”

“…Straight-line methods (pressure transient analysis analog): These methods include specialty plots (using dimensional variables) in which production data (corrected for variable flowing pressure) are plotted versus time or cumulative production functions that are designed to linearize the data for a specific flow regime. This approach to PDA has been used by Wattenbarger et al (1998), Poe et al (1999), Hager and Jones (2001), and Cheng et al (2009). Examples include squareroot-of-time plots which are used for linear flow analysis or quarter-root-of-time plots used for bilinear flow analysis.…”

Pressure Transient and Production Data Analysis for Hydraulic Fracture Treatment Evaluation

“…The objective now is to show how to determine the actual reservoir permeability and fracture half length and conductivity by PTA, 7,8,9,10,11 PDA, 12,13,14,15 or a combination of the two. 16 …”