TOPICS OF INTEREST
New Closed Blender Reduces Footprint, Gasification of CO2 in Waterless Fracturing
Carbon dioxide (CO2) waterless fracturing uses liquid CO2 to replace water as the fracturing fluid in reservoir stimulation. The continuity and reliability of the blender are key factors determining performance of the operation.
New Acidizing Method Improves Stimulation in Deep, High-Temperature Offshore Well
The complete paper discusses a method of stimulating deep, high-temperature offshore wells by combining an efficient single-phase retarded acid (SPRA) system and an engineered, degradable, large-sized particulate and fiber-laden diverter (LPFD).
Intervention Work Flow Improves Injection Coverage in Tight Carbonate Reservoirs
The complete paper discusses an advanced matrix-stimulation work flow that brings reliability and flexibility to the acidizing of tight carbonate water injectors and has delivered injectivity improvements tight carbonate onshore reservoirs in the Middle East.
Modified Inverse-Injectivity Method for Stimulation Evaluation Proves Effective
In the complete paper, the inverse-injectivity method of evaluating matrix-stimulation performance is modified and validated with real data of two matrix-acidizing operations in a gas-condensate field.
Several well-stimulation products and techniques have been seen to benefit well productivity from recent field trials and implementations in carbonate reservoirs, including simpler acid fluid systems, integrated work flows, and coiled-tubing bottomhole assemblies.
Multilateral Offshore Well Completed With Multistage Proppant Fracturing
The complete paper discusses the successful execution of the first offshore multilateral well completed for multistage high-pressure proppant stimulation, according to the authors, in the Black Sea offshore Romania.
Intelligent Completion Installations Instrumental in Brazilian Presalt Development
The complete paper presents a discussion of the use of intelligent well completion in Santos Basin Presalt Cluster wells.
Aggressive Stimulation Design Yields Better Returns
The authors examine methods of adopting an aggressive approach to optimizing stimulation design to lower the break-even level of operations and evaluate the results.
Seismic and Seismochemical Stimulation Increases Well Injectivity and Productivity
This paper discusses the potential of seismic and seismochemical well simulation in particular within the scope of this recent technology.
Chemical-Diversion Agents Can Aid Acid Fracturing in Openhole Horizontal Wells
This paper presents a newly designed triaxial fracturing system and describes a series of experiments that verified the validity of tool-free chemical diversion for multistage fracturing of openhole horizontal wells.
Factory-Model Approach Improves Performance of Coiled-Tubing Drillout
This paper presents a factory-model approach to improving CT drillout performance that has been used successfully for more than 3 years and has become standard practice.
The fourth industrial revolution is taking the oil and gas business by storm. Many companies have increased resources for big-data analytics and machine learning. Though no one sees physical oilfield services as in decline, development in these areas may take a back seat to artificial intelligence.
Real-Time Formation-Face-Pressure Analysis Improves Acid-Fracturing Operations
This paper contains a detailed discussion of methods and a software tool that has been developed to generate information that predicts formation-face pressures in real time with the help of live bottomhole-pressure data.
New Steamflooding Techniques Pay Off in Mukhaizna Field
This paper covers the staged field-development methodology, including analysis and evaluation of various development concepts, that enabled the company to optimize both completion design and artificial-lift selection, reducing downtime and lowering operating costs by nearly 50%.
Completions: Squeezing Out More Recovery
Completion engineers feel pressure to maximize production per acre and minimize the downsides of fracturing in tight spaces. Terry Palisch, talks about promoting knowledge sharing as part of JPT’s tech director report.
Seismic Stimulation: An Eco-Friendly, Effective EOR Alternative
Seismic stimulation, achievable with the implementation of a single tool, requires significantly lower investments than gas, thermal, and chemical injection methods, with minimal environmental impact.
Experimental Investigation of Fracturing With Propellant in a Large Sandstone Block
This paper describes an experimental study with a new propellant and aims to understand the pattern of fracture creation with these propellants.
Engineering Approach To Designing Fluid Diverters: Jamming and Plugging
Fluids introduced into a reservoir for stimulation typically take the path of least resistance and, therefore, frequently go into areas with open flow paths. In many cases, those areas are not the targets of stimulation.
Advances in Dendritic Acidizing Reveal Light at the End of the Tunnel
The evolution of horizontal drilling and multistage completions has changed matrix stimulation from the “more acid, better result” belief to effective lateral distribution and deeper penetration with less acid.
Chemical Stimulation at a Heavy-Oil Field: Key Considerations, Work Flow, and Results
This paper presents the planning and execution of a matrix-stimulation pilot project in the heavy-oil Chichimene Field in Colombia.
Cyclic Steam Stimulation Results in High Water Retention for Kuwaiti Heavy-Oil Field
Cyclic steam stimulation (CSS) is one of the principal enhanced-oil-recovery methods for heavy oil. CSS was performed in some of the wells of a heavy-oil field in Kuwait. Multiple cycles were applied in these wells. However, the total water produced in each cycle was much less than expected.
Coiled Tubing With Real-Time-Measurement Tools Helps Overcome Stimulation Problems
The treatment in a deepwater, frac-packed well with fiber-optic-equipped coiled tubing (CT) and a rotating, hydraulic high-pressure jetting tool achieved successful stimulation of a 500-ft-long frac-packed zone after several previous failures using different techniques.
Novel Coiled-Tubing Perforation Technique and Stimulation in Carbonate Gas Well
This paper discusses a novel approach to abrasive perforating, including the first-ever use of an acid-soluble abrasive material and ending with CT-jetting-assisted nitrified stimulation.
Monitoring of Matrix Acidizing by Use of Resistivity Measurements
This paper describes the testing of a novel concept based on resistivity measurements to monitor acid-stimulation operations.
Tight formations are candidates for hydraulic fracturing as the default. However, the solubility of carbonate by various chemicals provides opportunities to extend the well drainage radius effectively without the intensive equipment, material, and infrastructure demand of hydraulic fracturing.
Removing Fines-Migration Formation Damage in the Putumayo Basin in Colombia
This paper summarizes a wide variety of sandstone-acid-stimulation case histories, highlighting aspects such as mechanical conditions and operational practices.
CO2-Energized-Acid Treatment Reduces Freshwater Use, Boosts Well Performance
Carbon dioxide (CO2) with 30% foam quality (FQ) has been introduced for the first time during acid fracturing treatments in a tight, sour, high-pressure/high-temperature carbonate gas reservoir in Saudi Arabia.
Sandstone-Acidizing System Eliminates Need for Preflush and Post-Flush Stages
This paper presents experimental and field-case studies with a sandstone-acidizing treatment designed to retard the hydrofluoric acid reaction rate and enable single-stage treatment.
No-Damage Stimulation By Use of Residual-Free Diverting Fluids
This paper studied three residual-free fluid systems for acid treatments and fracturing in order to develop no-damage or reduced-damage and highly effective stimulation techniques for long-interval wells.
While there is increased scrutiny from regulatory and community stakeholders on the chemicals used in operations, complex and technically challenging reservoirs must be developed to replace reserves. Matrix stimulation remains a critical technology for delivering barrels at minimum cost.
Monitoring Acid-Stimulation Treatments With Slickline Distributed-Temperature Sensing
Mechanical-diversion techniques can ensure acid injection into the various intervals of naturally fractured reservoirs.
Use of Weak-Acid and Nonacid Alternatives in Acidizing Horizontal Wells
An operator developing tight carbonate reservoirs found that conventional acid stimulation with 15% hydrochloric acid (HCl) in horizontal wells did not provide expected results.
The technical contributions highlighted this year focus on matrix stimulation of carbonate and unconventional reservoirs.
Visualization of Acid Treatments With 3D Nuclear-Magnetic-Resonance Imaging
Core-flow tests are usually conducted to test and model stimulation treatments at laboratory scale, to predict the performance of such treatments in carbonate reservoirs.
Rethinking Proppant: From Liquid to Solid
At the SPE Hydraulic Fracturing Technology Conference, one of the most innovative ideas discussed was a liquid proppant designed to turn into strong spherical balls to keep a fracture open.
Pushing the Limits of Deepwater Stimulation
The lower tertiary formation found in the pre-salt layers of the Gulf of Mexico has become a proving ground for extending what is possible when completing multistage fracturing in ultradeepwater wells.
Placement of Stimulating Fluids in Multilayered Carbonate Reservoirs
This paper presents an alternative approach to designing and executing matrix-stimulation treatments in multilayered carbonate reservoirs.
Self-Diverting Acid for Effective Carbonate Stimulation Offshore Brazil
This work describes the positive results experienced when a self-diverting acid system based on a viscoelastic-surfactant (VES) technology was introduced for carbonate-reservoir stimulation offshore Brazil.
Acidizing a Sandstone Formation Successfully in the Gulf of Cambay
This paper describes a matrix-acidizing campaign executed successfully in the Gulf of Cambay on the west coast of India.
Matrix stimulation encompasses pumping processes used to improve the connection between the wellbore and the reservoir. They are effective in a wide range of lithologies and have been successful in most types of completions: cased and openhole, horizontal and vertical, simple and complex, injectors
Development of a Volumetric Horizontal-Well-Stimulation Model
The elliptical (conical) damage profile associated with horizontal wells is well-known, but review of industry-wide applications by different operators shows no corresponding uniform correlation between the damage profile and actual treatment volumes that have been applied.
New Methods and Workflows Boost Effectiveness of Multizone Stimulation
Novel multizone stimulation technologies have enabled the development of tight resources that previously could not be developed economically and have enabled optimization of production resources distributed over thick gross intervals.
Optimization of Limited-Entry Matrix Acid Stimulations in the Danish Central Graben
In the Danish central graben, tight chalk reservoirs have been developed successfully through drilling, completion, and stimulation of long horizontal wells.
A New Strategy Explores Tight Oil/Gas Reservoirs: Fit-for-Purpose Acid Fracturing
As oil companies have moved to more-marginal reservoir targets, application of conventional techniques has often yielded disappointing results, and tighter zones are often abandoned for more-promising target intervals.
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