First Acid-Fracturing Using New Fluid Technology Unlocks the Production Potential of Tight Carbonate, Mauddud Reservoir in North Kuwait

2015 ◽  
Author(s):  
Badriya Al-Enezi ◽  
Elred Anthony ◽  
Sabry Abd El-Aziz ◽  
Mohamed Abdel-Basset ◽  
Ahmed Mokhtar ◽  
...  
Keyword(s):  
Production Potential ◽  
Acid Fracturing ◽  
Tight Carbonate

An Integrated Experimental Method to Investigate Tool-Less Temporary-Plugging Multistage Acid Fracturing of Horizontal Well by Using Self-Degradable Diverters

SPE Journal ◽  
2020 ◽  
Vol 25 (03) ◽  
pp. 1204-1219 ◽  
Author(s):  
Lufeng Zhang ◽  
Fujian Zhou ◽  
Jianye Mou ◽  
Wei Feng ◽  
Zhun Li ◽  
...  
Keyword(s):  
Fracture Surface ◽  
Evaluation System ◽  
Horizontal Well ◽  
Single Type ◽  
Fracture Width ◽  
Acid Fracturing ◽  
Integrated Method ◽  
Tight Carbonate ◽  
Operation Cost ◽  
Insight Into

Summary Tool-less temporary-plugging multistage acid fracturing of horizontal well is a necessary technology to unlock the production potential and enable commercial productivity for tight carbonate reservoirs. However, this technique has not been investigated experimentally yet, and the plugging behavior of diverters within acid-etched fracture is still unclear. In this paper, we propose an integrated method to experimentally study tool-less multistage fracturing with diverters. First, we introduce an innovative 3D printing method to reproduce the roughness of acid-etched fracture surface and design an acid-etched fracture temporary plugging evaluation system to satisfy the requirements of temporary plugging experiments. Then, we conduct a series of plugging experiments to optimize the diverter's formula for creating a tight plugging zone within an acid-etched fracture under different fracture widths. On the basis of the description of the fracture surface, we further analyze the formation process and mechanism of temporary plugging. Finally, we further verify through laboratory experiments using a modified true tri-axial fracturing system the feasibility of using a single type of diverter and combined diverters to achieve tool-less temporary plugging staged fracturing of horizontal well. The experimental results show the following findings: (1) Pure fibers can realize temporary plugging at lower fracture width (≤2 mm). (2) To achieve temporary plugging, the diameter of particulates should not be less than half of the fracture width under the condition of larger fracture width (≥4 mm). (3) The fracture surface morphology affects the formation time of temporary plugging, but does not affect whether temporary plugging is formed or not. (4) Using a steel plate with a smooth fracture surface to conduct optimization experiments will increase the dosage of diverters, thus increasing the operation cost. (5) Pure particulates cannot achieve favorable plugging effect. This study provides an insight into multistage acid fracturing.

First Acid Fracturing Unlocks the Production Potential of Tight Tuba Carbonate Reservoir, North Kuwait

2015 ◽  
Author(s):  
A. AL-Hassan ◽  
E. Anthony ◽  
S. Abd El-Aziz ◽  
M. Abdel-Basset ◽  
A. Mokhtar ◽  
...  
Keyword(s):  
Carbonate Reservoir ◽  
Production Potential ◽  
Acid Fracturing

scholarly journals Optimization of acid fracturing for a tight carbonate reservoir

Petroleum ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 70-79 ◽  
Author(s):  
Aymen Al-Ameri ◽  
Talal Gamadi
Keyword(s):  
Carbonate Reservoir ◽  
Acid Fracturing ◽  
Tight Carbonate

Acid Fracturing Tight Gas Carbonates Reservoirs Using CO2 to Assist Stimulation Fluids: An Alternative to Less Water Consumption while Maintaining Productivity

2015 ◽  
Author(s):  
Mauricio Sanchez ◽  
Justin Tate Abel ◽  
Muhammad Idris ◽  
Eduardo Soriano ◽  
Alfredo Lopez ◽  
...  
Keyword(s):  
Water Consumption ◽  
Physical And Mechanical Properties ◽  
Point Of View ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Tight Sandstone ◽  
Acid Fracturing ◽  
Fracturing Fluids ◽  
Tight Carbonate ◽  
Carbon Dioxide Co2

Abstract Conventional hydraulic fracture stimulation techniques have been widely used to enhance production from tight gas reservoirs. Since the initial use of this method to increase production rates, the industry has witnessed continued advancement in terms of fracturing theory, fluids, and techniques. The use of carbon dioxide (CO2) since the early 1960s has continued to be a significant part of these advances. CO2 has been used for many years as an energy source to aid fluid recovery of well stimulation fluids. This technology predominantly has been used to stimulate tight sandstone reservoirs. There are very limited applications for low permeable tight carbonate reservoirs because of complexities associated with the physical and mechanical properties of carbonate rocks and its interaction with fracturing fluid. Nevertheless, the advantages of using assisted CO2 stimulation fluids as the elimination of potential formation damage normally associated with fracturing fluids and very rapid cleanup are still present. This paper outlines one of the first acid fracturing jobs assisted with CO2 conducted on a tight gas well reservoir in Saudi Arabia. It describes in a simple manner the screening methodology and key parameters considered during selection of a well candidate and the design process, which was based on petrophysical, mechanical, and chemistry properties of the formation and the respective interaction with treatment fluids. Moreover, primary operational procedures and guidelines are discussed, highlighting a safety risk assessment point of view. Implementing this technique in a more generalized manner in the field can help save considerable operational time and costs. CO2 used to energized fracturing fluids can increase the productivity of the well while using less water and less acid than conventional acid fracturing, which is of primary importance in such a harsh environment, requiring less water consumption.

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