scholarly journals A Review of Linear Gel Fracturing Fluids

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Chavali M
Keyword(s):  
Real Time ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Final Temperature ◽  
Bottom Hole ◽  
Fracturing Fluids ◽  
Optimum Utilization ◽  
First Time ◽  
Real Time Application ◽  
Pilot Tests

Linear gel is prepared by treating bio-diesel with various water samplescollected from different water bodies. The new biodiesel based linear gel was employed in the recovery of oil wells through hydro fracturing and pilot tests were conducted for the first time. Viscosity of gel was measured at various bottom hole-circulating temperatures and it was found to vary from 32 to zero dial reading in the range of 45°C to 60°C. Gelwasobservedto break at 45°C and 60°C in 120 minutes. So, the final temperature was selected as 60°C for the application of gel for coal bed methane (CBM) wells. It was observed that higher levels of salinity in water helped in optimum utilization of gel in real time application.

scholarly journals Novel eco-friendly linear gel for oil well recovery through efficient hydrofracturing

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
R. V. V. Ramana Murthy ◽  
K. S. R. Murthy ◽  
Murthy Chavali
Keyword(s):  
Water Samples ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Oil Well ◽  
Final Temperature ◽  
Bottom Hole ◽  
Optimum Utilization ◽  
First Time ◽  
Real Time Application ◽  
Pilot Tests

The linear gel is prepared by treating bio-diesel with various water samples collected from different water bodies. The new biodiesel based linear gel was employed in the recovery of oil wells through hydrofracturing and pilot tests were conducted for the first time. The viscosity of gel was measured at various bottom hole-circulating temperatures and it was found to vary from 32 to zero dial reading in the range of 45ºC to 60ºC. The gel was observed to break at 45ºC and 60ºC in 120 min. So the final temperature was selected as 60ºC for the application of gel for coal bed methane (CBM) wells. It was observed that higher levels of salinity in water helped in optimum utilization of gel in real-time application.

scholarly journals Development of Instant Linear Gel for Coal Bed Methane Gas Operations

2021 ◽  
Vol 1 (3) ◽  
Author(s):  
Ramana Murthy RVV
Keyword(s):  
Sodium Acetate ◽  
Guar Gum ◽  
Small Concentration ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Ammonium Persulphate ◽  
Gelling Agents ◽  
Fracturing Fluids ◽  
Degradation Pattern ◽  
Suspending Agents

Previously we prepared fracturing linear gel with fossil diesel, bio-diesel and also used suspending, anti-settling agents and emulsifiers. But through this research, a novel and efficient method for the preparation of linear gel directly mixed with water, guar gum and sodium acetate together instantly. In this instead of diesel, we used water and no need to mix anti-settling agents, suspending agents, emulsifiers that resulted in 30 viscosity linear gel. Ammonium persulphate or Ammonium peroxidisulphate and enzyme-G are used for oxidation purposes to break the gel gradually at a particular static temperature. The degradation pattern observed from the breaker test showed that a reduction in gel viscosity depends on time, temperature & breaker concentration. Observations from experiments revealed that a small concentration of breakers provides rapid break compared to oxidative breakers. This article, designing of fracturing fluids describes how to use the fluid's viscosity generated by the gelling agents like guar gum for CBM operations.

scholarly journals Design and development of instant linear gel for coal bed methane gas operations

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
R. V. V. Ramana Murthy ◽  
K. S. R. Murthy ◽  
Murthy Chavali
Keyword(s):  
Guar Gum ◽  
Research Work ◽  
Small Concentration ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Fracturing Fluids ◽  
Degradation Pattern ◽  
Extensive Range ◽  
Aqueous Base ◽  
Suspending Agents

Linear gel fracturing fluids are expressed with an extensive range of materials/polymers in an aqueous base. Earlier we developed fracturing linear gel with fossil diesel, bio-diesel and also used suspending anti-settling agents and emulsifiers. Here we report on a novel and an efficient method for the preparation of linear gel direct mix with water, guar gum and sodium acetate together instantly. In this research work, we used water instead of diesel without any need to mix anti-settling agents, suspending agents, emulsifiers that resulted in 30 viscosity linear gel. Degradation pattern observed from the breaker test showed that a reduction in gel viscosity depends on time, temperature & breaker concentration. Ammonium per sulphate or Ammonium per oxidisulphate and enzyme-G were used for oxidation purpose to break the gel gradually at a particular static temperature. Observations from experiments revealed that a small concentration of breaker provides rapid break compared to oxidative breakers. This article, designing of fracturing fluids describes how to use the fluid's viscosity generated by the gelling agents like guar gum for CBM operations.

Research on and Application of Clean Fracturing Fluids in Coal-Bed Methane

2015 ◽  
Vol 1092-1093 ◽  
pp. 212-215 ◽  
Author(s):  
Yi Dan Wang ◽  
Hong Fu Fan
Keyword(s):  
Methane Production ◽  
Development Trend ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Development History ◽  
Action Mechanisms ◽  
Fracturing Fluids ◽  
Fluid Systems ◽  
History Of ◽  
The Development Trend

The development history of fracturing fluids is reviewed, the compositions and action mechanisms of the clean fracturing fluid systems used currently are analyzed, the recent research and application of the clean fracturing fluids in coal—bed methane production are summarized, and the development trend of clean fracturing fluids is presented in this paper.

Estimation of Bottom Hole Pressure BHP in Coal Bed Methane CBM Wells

2019 ◽  
Author(s):  
Jinen Vora ◽  
Pratik Patel ◽  
Santosh Bhamidipati
Keyword(s):  
Coal Bed ◽  
Coal Bed Methane ◽  
Hole Pressure ◽  
Bottom Hole Pressure ◽  
Bottom Hole

scholarly journals Novel method for optimizing the dewatering rate of a coal-bed methane well

2020 ◽  
Vol 38 (4) ◽  
pp. 1099-1117
Author(s):  
Xiuqin Lu ◽  
Zhiqi Wu ◽  
Xuefei Li ◽  
Chen Zhang ◽  
Ning Wang ◽  
...  
Keyword(s):  
Methane Production ◽  
Single Phase ◽  
Fluid Velocity ◽  
Stress Sensitivity ◽  
Initial Permeability ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Bottom Hole ◽  
Phase Water ◽  
Pressure Propagation

The reasonable dewatering rate in the single-phase water flow plays an essential role in pressure propagation and coal-bed methane production. However, current fluid velocity sensitivity experiments cannot provide an optimum dewatering rate for field coal-bed methane production. This study proposes a new method to optimize the dewatering rate for coal-bed methane wells by assuming the investigation distance reaches the well boundary when the bottom hole pressure declines to the critical desorption pressure. The effect of the stress sensitivity and fluid velocity sensitivity on pressure propagation was first simulated with COMSOL Multiphysics software. The results showed that the expansion area considering the stress sensitivity is shorter than that neglecting the stress sensitivity when the bottom hole pressure reached to the critical desorption pressure at 200 days. The expansion area with high dewatering rate will be shorter about 35 m than that with low dewatering rate at 200 days. The relationship between the maximum investigation distance and required time was established to optimize the dewatering rate by combining the pressure profile considering the influence of stress sensitivity with material balance equation. The new model indicates that the initial permeability, porosity, and cleat compressibility have an important effect on investigation distance. The simulation of these parameters’ sensitivity suggests that the bigger the ratio of initial permeability and porosity, the longer the investigation distance is, and the smaller the cleat compressibility is, the longer the expansion area is. According to this model, we need to take more than 600 days at 0.58 m/d constant dewatering rate to reach the maximum investigation distance of 0.67 mD initial permeability. This work can be conducive to choose reasonable dewatering rate in single-phase water flow for coal-bed methane well production.

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