A New Model to Predict Fractured Horizontal Well Production

2006 ◽  
Author(s):  
J. Guo ◽  
F. Zeng ◽  
J. Zhao ◽  
Y. Xu
Keyword(s):  
Horizontal Well ◽  
New Model ◽  
Well Production ◽  
Fractured Horizontal Well

scholarly journals Production Rate Analysis of Fractured Horizontal Well considering Multitransport Mechanisms in Shale Gas Reservoir

Geofluids ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-17 ◽  
Author(s):  
Qi-guo Liu ◽  
Wei-hong Wang ◽  
Hua Liu ◽  
Guangdong Zhang ◽  
Long-xin Li ◽  
...  
Keyword(s):  
Production Rate ◽  
Shale Gas ◽  
Horizontal Well ◽  
Production Performance ◽  
Natural Fractures ◽  
Gas Reservoir ◽  
Isothermal Adsorption ◽  
Well Production ◽  
Shale Gas Reservoir ◽  
Fractured Horizontal Well

Shale gas reservoir has been aggressively exploited around the world, which has complex pore structure with multiple transport mechanisms according to the reservoir characteristics. In this paper, a new comprehensive mathematical model is established to analyze the production performance of multiple fractured horizontal well (MFHW) in box-shaped shale gas reservoir considering multiscaled flow mechanisms (ad/desorption and Fick diffusion). In the model, the adsorbed gas is assumed not directly diffused into the natural macrofractures but into the macropores of matrix first and then flows into the natural fractures. The ad/desorption phenomenon of shale gas on the matrix particles is described by a combination of the Langmuir’s isothermal adsorption equation, continuity equation, gas state equation, and the motion equation in matrix system. On the basis of the Green’s function theory, the point source solution is derived under the assumption that gas flow from macropores into natural fractures follows transient interporosity and absorbed gas diffused into macropores from nanopores follows unsteady-state diffusion. The production rate expression of a MFHW producing at constant bottomhole pressure is obtained by using Duhamel’s principle. Moreover, the curves of well production rate and cumulative production vs. time are plotted by Stehfest numerical inversion algorithm and also the effects of influential factors on well production performance are analyzed. The results derived in this paper have significance to the guidance of shale gas reservoir development.

A New Model for Predicting Productivity and Application for Fractured Horizontal Wells

2012 ◽  
Vol 524-527 ◽  
pp. 1310-1313
Author(s):  
Zhi Hong Zhao ◽  
Jian Chun Guo ◽  
Fan Hui Zeng
Keyword(s):  
Horizontal Well ◽  
North China ◽  
Physical Property ◽  
Horizontal Wells ◽  
Azimuth Angle ◽  
Production Well ◽  
New Model ◽  
Fracture Length ◽  
Fractured Horizontal Well ◽  
Fractured Horizontal Wells

Due to the differences of stress and physical property in the pay zone, the fractured horizontal well may be different in length and azimuth angle. Furthermore, because of the mutual disturbance among fractures, the accurate prediction of production of fractured horizontal wells become more complicated. This paper presents a new model to predict the production of the fractured horizontal wells by considering the effects of fracture number, fracture length, fracture interval, fracture symmetry, azimuth angle and conductivity. Compared with the numerical simulation, this model needs less parameter and calculating time, and is easy to be applied to the designs of segmentation fracturing in horizontal wells. The model in this paper has been applied to the optimizing designs of hydraulic fracturing for two horizontal wells in North China oilfield and the predicted results agree with the actual production well.

Assessment of Production Interference Level Due to Fracture Hits Using Diagnostic Charts

SPE Journal ◽  
2020 ◽  
Vol 25 (06) ◽  
pp. 2837-2852 ◽  
Author(s):  
Xi Yang ◽  
Wei Yu ◽  
Kan Wu ◽  
Ruud Weijermars
Keyword(s):  
Horizontal Well ◽  
Well Testing ◽  
Square Root ◽  
Eagle Ford ◽  
Flow Models ◽  
Well Production ◽  
Interference Level ◽  
Dimensionless Pressure ◽  
Fractured Horizontal Well ◽  
Bottomhole Pressure

Summary The objective of this study is to develop a new method that leads to diagnostic charts that quantify the pressure response between two interfering wells. Analytical linear flow models for single hydraulic fracture are used to develop a fracture hit model, which is next verified with a numerical model for validity. An analytical two-fracture model is then developed to simulate flowing bottomhole pressure (BHP) of a shut-in well, which interferes with the other well through a fracture hit, during well-testing for a short-term period. From the insight of two-fracture analytical model, a dimensionless pressure scalar, which is proportional to square root of time, is proposed to summarize the interference level between two wells. Utilizing such proportionality between the defined dimensionless pressure scalar and square root of time, a diagnostic chart for quick assessment of the production interference level between wells is developed. Such diagnostic chart is also applied to interference caused by multifracture hits that a multistage fractured horizontal well with history match performed from the Eagle Ford formation is considered as a parent well for production interference quantification. A new identical horizontal well, which is just fractured but is not in production, is assumed parallel to the pre-existing well. The result shows that when the percentage of fracture connection increases, the slope of dimensionless pressure scalar vs. square root of time increases proportionally to the percentage of fracture connection. Because the slope of dimensionless pressure scalar vs. square root of time is between 0 and 1, it can be used to quantify the well production interference level under different situations.

A new model for predicting critical gas velocity ofliquid loading in horizontal well

2018 ◽  
Vol 35 (6) ◽  
pp. 551
Author(s):  
Yonghui LIU ◽  
Xianting AI ◽  
Chengcheng LUO ◽  
Fengwei LIU ◽  
Pengbo WU
Keyword(s):  
Horizontal Well ◽  
Gas Velocity ◽  
New Model
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