Evaluation of fracture asymmetry of finite-conductivity fractured wells

Journal Article · Fri May 01 00:00:00 EDT 1992 · SPE (Society of Petroleum Engineers) Production Engineering; (United States)

DOI:https://doi.org/10.2118/20583-PA· OSTI ID:5288834

Rodriguez, F; Cinco-Ley, H; Samaniego, F ^[1]

---

1. Univ. National de Mexico (MX)

This paper presents a graphical technique to evaluate asymmetry of hydraulically fractured wells. This technique is based on a new analytical solution for the pressure behavior of a finite-conductivity, asymmetrically fractured well during the pseudolinear flow period and the known bilinear flow solution. A semianalytical solution for transient flow toward finite-conductivity, asymmetrically fractured wells producing at constant rate is also presented. This solution was used with the analytical solution to analyze the pseudolinear flow pressure behavior. An expression relating dimensionless fracture conductivity, C{sub fD}, and asymmetry factor, a, with a parameter calculated from analysis of well-test data, {beta}{sub a}, was developed by combining the pseudolinear and bilinear flow solutions; a graph of a vs. {beta}{sub a} with C{sub fD} as a parameter is then constructed. The parameters {beta}{sub a} and C{sub fD} are calculated as follows: {beta}{sub a} = 0.309 m{sup 2}{sub bf}/(b{sub Lf}m{sub Lf}) and C{sub fD} = 2.944 m{sub Lf}m/m{sup 2}{sub bf}, with m{sub bf} as the slope of the bilinear {Delta}p-vs-t{sup 1/4} straight line, m{sub Lf} and b{sub Lf} as the slope and intercept of the pseudolinear {Delta}p-vs-t{sup 1/2} straight line, respectively, and m as the slope of the semilog {Delta}p-vs.-log t straight line obtained during the pseudoradial flow period. Correlations developed apply indistinctly to oil and gas wells. Published field data were reanalyzed with the technique presented here and asymmetry was detected.

• OSTI ID: 5288834
• Journal Information: SPE (Society of Petroleum Engineers) Production Engineering; (United States), Journal Name: SPE (Society of Petroleum Engineers) Production Engineering; (United States) Vol. 7:2; ISSN SPENE; ISSN 0885-9221
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ANALYTICAL SOLUTION
ASYMMETRY
CALCULATION METHODS
CORRELATIONS
DATA ANALYSIS
EVALUATION
FLUID FLOW
FLUIDS
FRACTURED RESERVOIRS
FRACTURING
FRACTURING FLUIDS
HYDRAULIC FRACTURING
NATURAL GAS WELLS
OIL WELLS
PERFORMANCE TESTING
RESERVOIR PRESSURE
RESERVOIR ROCK
STIMULATION
TESTING
WELL STIMULATION
WELLS