Analysis of Rate Dependence in Transient Linear Flow in Tight Gas Wells

2005 ◽  
Author(s):  
M. Ibrahim ◽  
R.A. Wattenbarger
Keyword(s):  
Rate Dependence ◽  
Tight Gas ◽  
Gas Wells ◽  
Linear Flow

Production Analysis of Linear Flow Into Fractured Tight Gas Wells

1998 ◽  
Author(s):  
Robert A. Wattenbarger ◽  
Ahmed H. El-Banbi ◽  
Mauricio E. Villegas ◽  
J. Bryan Maggard
Keyword(s):  
Tight Gas ◽  
Gas Wells ◽  
Linear Flow ◽  
Production Analysis

Some History Cases of Long-Term Linear Flow in Tight Gas Wells

2001 ◽  
Author(s):  
J.A. Arevalo-Villagran ◽  
R.A. Wattenbarger ◽  
F. Samaniego-Verduzco ◽  
T.T. Pham
Keyword(s):  
Tight Gas ◽  
Gas Wells ◽  
Linear Flow ◽  
Term Linear

scholarly journals A Novel Methodology for Production Decline Analysis in Tight Gas Reservoirs: A Case Study from Sulige Tight Gas Field

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Xiaofeng Li ◽  
Lili Liu ◽  
Jiaojiao Liu ◽  
Zhichao Li ◽  
Xiaoliang Zhao
Keyword(s):  
Flow Regime ◽  
Flow Characteristics ◽  
Empirical Method ◽  
Tight Gas ◽  
Gas Wells ◽  
Gas Reservoirs ◽  
Gas Field ◽  
Linear Flow ◽  
Graphical Technique ◽  
Straight Lines

Study shows that decline exponents of gas wells in Sulige Tight Gas Field vary during their life cycle. However, decline analysis methods with variable decline exponent have not been developed so far. To address this problem, a simple-yet-effective method is proposed. In this method, the fracture linear flow regime and the channel linear flow regime, which appear two straight lines on the coordinate axis ( 1 / q vs. t ), respectively, are used to carry out the decline analysis. Each regime has a different slope and intercept (in the form of 1 / q vs. t ), which leads to a useful graphical technique for predicting gas rate. The graphical technique is verified by matching actual gas rate and predicting future gas rate trend. Theoretically, the influence of the two slopes and intercepts in the graphical technique on the rate decline is also studied. Aiming at decline analysis for tight gas wells with variable decline exponents, this paper proposes a novel method using linear flow characteristics, which ingeniously avoids the establishment of an empirical method to deal with variable decline exponent. The method in this study can help for better understanding of decline analysis of tight gas wells in a theoretical manner.

Some History Cases of Long-Term Linear Flow in Tight Gas Wells

2006 ◽  
Vol 45 (03) ◽  
Author(s):  
J.A. Arevalo-Villagran ◽  
R.A. Wattenbarger ◽  
F. Samaniego-Verduzco
Keyword(s):  
Tight Gas ◽  
Gas Wells ◽  
Linear Flow ◽  
Term Linear

scholarly journals Energy Return on Energy Invested for Tight Gas Wells in the Appalachian Basin, United States of America

2011 ◽  
Vol 3 (10) ◽  
pp. 1986-2008 ◽  
Author(s):  
Bryan Sell ◽  
David Murphy ◽  
Charles A.S. Hall
Keyword(s):  
United States ◽  
United States Of America ◽  
Appalachian Basin ◽  
Tight Gas ◽  
Gas Wells

A New Approach for Reliable Estimation of Hydraulic Fracture Properties Using Elliptical Flow Data in Tight Gas Wells

2009 ◽  
Vol 12 (02) ◽  
pp. 254-262 ◽  
Author(s):  
Yueming Cheng ◽  
W. John Lee ◽  
Duane A. McVay
Keyword(s):  
Hydraulic Fracture ◽  
Finite Conductivity ◽  
Tight Gas ◽  
Well Test ◽  
Pressure Data ◽  
Gas Wells ◽  
New Approach ◽  
Fracture Properties ◽  
Elliptical Flow ◽  
Half Length

Summary Gas wells in low-permeability formations usually require hydraulic fracturing to be commercially viable. Pressure transient analysis in hydraulically fractured tight gas wells is commonly based on analysis of three flow regimes: bilinear, linear, and pseudoradial. Without the presence of pseudoradial flow, neither reservoir permeability nor fracture half-length can be independently estimated. In practice, as pseudoradial flow is often absent, the resulting estimation is uncertain and unreliable. On the other hand, elliptical flow, which exists between linear flow and pseudoradial flow, is of long duration (typically months to years). We can acquire much rate and pressure data during this flow regime, but no practical well test analysis technique is currently available to interpret these data. This paper presents a new approach to reliably estimate reservoir and hydraulic fracture properties from analysis of pressure data obtained during the elliptical flow period. The method is applicable to estimate fracture half-length, formation permeability, and skin factor independently for both infinite- and finite-conductivity fractures. It is iterative and features rapid convergence. The method can estimate formation permeability when pseudoradial flow does not exist. Coupled with stable deconvolution technology, which converts variable production-rate and pressure measurements into an equivalent constant-rate pressure drawdown test, this method can provide fracture-property estimates from readily available, noisy production data. We present synthetic and field examples to illustrate the procedures and demonstrate the validity and applicability of the proposed approach.

Gas Volumes in Place Estimation Method for Tight Gas Wells: Combining Formation Stress-sensitivity and Two-phase Flow

2015 ◽  
Author(s):  
Xiangji Dou ◽  
Xinwei Liao ◽  
Xiaofeng Li ◽  
Hongmei Liao ◽  
Xiangnan He ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Estimation Method ◽  
Stress Sensitivity ◽  
Phase Flow ◽  
Tight Gas ◽  
Gas Wells ◽  
Two Phase
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