Conventional Sandstone Stimulation con't

Scale Control
Remove and Control Scale Buildup

Scale control challenges are the leading cause of declining production worldwide. They cost the petroleum industry millions of dollars each year in scale control and removal costs and in deferred production. Scale control through chemical inhibition is preferred for maintaining well productivity, but when scale forms on the wellbore, more advanced scale control techniques must be applied.

Schlumberger scale control services are not only effective at removing scale and preventing repricipitation, they are quick and nondamaging to the wellbore, tubing, or formation environment.
Jet Blaster Scale Removal
Polymer-Free Fracturing Fluids

The Schlumberger ClearFRAC family of polymer-free fracturing fluids enables a larger effective fracture half-length. The ClearFRAC fluid system also reduces friction pressure, allowing operators to save costs with reduced pumping equipment. Viscosity remains constant at a given temperature until contacted by formation fluids or added chemical breakers.

Applications include

* nitrogen and carbon dioxide (CO2) foam fracturing
* stimulation in hard-to-reach zones
* offshore operations.

The three ClearFRAC formulations each have specific applications.
CO2 Polymer-Free Fracturing Fluid

Significantly reduce operations costs with nitrogen foam fracturing treatments.
Polymer-Free Fracturing Fluid

Maximize conductivity with polymer-free fracturing.
High-Permeability, Polymer-Free Fracturing Fluid

Enhance fracture efficiency using the innovative viscoelastic surfactant (VES) system for low friction pressure and excellent proppant-carrying capacity.
Gelled-Oil Fracturing Fluid

YF GO III continuous-mix, gelled oil service

YF GO III is a patented gelled, oil-base sandstone fluid designed primarily for treating water-sensitive formations. Originally designed for continuous-mix operations, it is used successfully in both continuous and batch-mix conditions. YF GO III can gel diesel, condensates, and a wide variety of crudes as the oil base.
YF GO IV high-temperature, gelled-oil service

YF GO IV gelled-oil sandstone fluids are designed for broad use in sandstone applications where gelled oil is commonly used (i.e., water-sensitive formations). Originally designed for use only with clean, dry diesel, YF GO IV can be used with many dry, uncontaminated crude oils. The advantages of using YF GO IV include high-temperature stability, low static viscosity, and predictable rheological profiles.
HiWAY Channel Fracturing

How it works

To allow more fracture conductivity in conventional fracturing jobs, HiWAY channel fracturing fundamentally changes the way that proppant fractures generate conductivity. It engineers stable flow channels into the proppant pack that are connected from the tip of the fracture back toward the wellbore, creating the optimal connection between the reservoir and the wellbore. The productivity of the fracture is decoupled from the actual permeability of the proppant used, so rather than flowing through the proppant in the pack, hydrocarbons flow through stable channels—meaning infinite fracture conductivity.

Traditional losses in proppant pack conductivity from crushing, fines, fluid damage, multiphase flow, and non-Darcy effects are eliminated, ensuring more fluid and polymer recovery, meaning optimized production.
What it combines

A unique combination of placement and materials engineering, completions techniques, and process control equipment enables the success of HiWAY channel fracturing. The stability of the flow channels is ensured by using a proprietary fiber, which maintains the structures from surface to reservoir until the fracture has closed and the in situ stress of the rock takes over.
Where it’s used

HiWAY channel fracturing provides more fracture conductivity and optimized production for conventional consolidated rock fracturing treatments of oil and gas wells. For example, it has been successfully applied in the Rocky Mountain region of the US and the Sierras Blancas formation in Argentina for major improvements in time to sales, fluid recovery, initial production rate, and average-well estimated ultimate recovery (EUR).
Organic Clay Acid Stimulation Fluid
High-Performance Formation Cleanup Treatment

Wells in the sandstone formations common to the U.S. Gulf Coast generally have migrating fines that can plug the near-wellbore area and severely limit production. Although conventional stimulation fluids,such as hydrochloric (HCl) or mud acid, can clean up the wellbore and stimulate the sandstone, they do not penetrate deep into the formation nor stabilize fines. Conventional acids can also have adverse effects in formations with certain types of clays, like zeolite and chlorite, that are unstable in HCl acid.

OCA organic clay acid stimulation fluid penetrates deep into the sensitive formation and stabilizes clays and fines without the adverse effects of conventional acid systems.
Innovative acid system

OCA fluid is a high-performance acid system designed for sensitive sandstone sandstone formations that can present the biggest challenge to conventional acidizing treatments. Because of the damaging precipitation of secondary and tertiary reaction products, conventional mud acid has the highest chance of failure in formations with very high temperature or a high clay content that is sensitive to HCl.

OCA fluid combines a retardation effect and advanced chelation technology for stimulation deep into the reservoir with minimal precipitation. It reduces the risk of diminished production as well as secondary and tertiary mineral precipitation that can block pores. Its retarded properties allow a reduced corrosivity. OCA fluid also combats sludging problems that plague conventional acid systems and stabilizes formation fines while maintaining the integrity of the sandstone structures to promote long-term production.
Laboratory testing

Sequential spending tests that simulate deep formation penetration have demonstrated that the reaction between sandstone minerals and conventional acid systems can cause silica gel precipitation.

With conventional acids, silicon can deplete in a spent acid solution as it penetrates deep into the formation. In laboratory tests, the ratio of silicon to aluminum decreases as the acid penetrates deeper into the formation. This decrease indicates the precipitation of formation-damaging hydrated silica gel.

As OCA fluid penetrates deep into the formation, tests show increasingly higher silicon and aluminum concentrations. OCA fluid keeps all the dissolved ions in solution. The OCA fluid continues to dissolve without forming damaging secondary and tertiary hydrated silica precipitation.

Jetting scale removal service for effective one-trip wellbore cleaning.
ScaleFRAC Scale Inhibitor

Scale inhibitor service that protects wellbores and propped fractures from scale damage and related production declines.
ScaleMAT Acid-Compatible Scale Inhibitor

Acid-compatible scale inhibitor that enables scale inhibition at the same time as matrix stimulation.
ScalePROP Scale Inhibitor Proppant

Scale-inhibitor-impregnated proppant for long-term protection for fracturing proppant packs.
ScaleSOLV Carbonate Scale Dissolver

Carbonate scale dissolver to remove scale chemically without corrosion.

Monitoring Stimulation Treatments

Accurate characterization of the locations, geometry, and dimensions of a hydraulic fracture system makes optimization of reservoir performance possible.

FracCAT Fracturing Computer-Aided Treatment

Monitor, Record & Control Stimulation Treatments in Real Time

The FracCAT fracturing computer-aided treatment system comprises hardware and software for monitoring, controlling, recording and reporting all types of fracturing treatments. Its real-time displays, plots, surface schematics and wellbore animations present a clear picture of the treatment as it occurs, providing decision-makers with real-time detailed job information from the surface to the perforations.

Technology and software

Using FracCAT technology, treatment design is followed and execution is precise. Integration with the Schlumberger FracCADE design and evaluation software allows job designs to be loaded directly into the FracCAT software.

During the job, the FracCAT system tracks the design and displays actual job parameters compared to planned values. FracCAT software also uses the design to control proppant and additive concentrations in as many as three blenders at the same time. This control capability ensures that actual concentrations follow the plan. Job data are sent to the FracCADE software in real time. If the FracCADE analysis indicates a need for design changes, the changes can be imported directly into the FracCAT software without interrupting the treatment. The FracCAT system works in conjunction with a local area network (LAN) environment, which enables networking of all PCs at the wellsite and also provides a connection to the Internet through satellite or cellular telephone technology. The Internet connectivity provides the ability to transmit real-time data from the remote wellsite to anywhere in the world for real-time analysis.

FracCAT controls make deviations from the schedule, such as extending a proppant stage or starting flush early, as simple as a single mouse-click.

Hardware

FracCAT hardware includes the latest high-performance PC systems. Innovations such as space-saving flat-panel displays and multiple monitors provide best-in-class presentation of data. All these features inside an ergonomically designed control cabin offer the ultimate job control environment and make the FracCAT system the premier tool for fracturing treatments.

Offshore vessels

We bring stimulation services to the world's high seas. BIGORANGE XVIII is purpose-built for environmentally safe North Sea operations. Rapidly deployed DeepSTIM vessels in the Gulf of Mexico are reliable in severe weather, remaining offshore for long periods. Galaxie is an advanced, versatile well stimulation vessel.
BIGORANGE XVIII Stimulation Vessel

Purpose-built stimulation vessel designed for North Sea operations.
DeepSTIM Stimulation Vessel

Advanced, versatile stimulation fleet equipped with dynamic positioning systems.
DeepSTIM Pronto Offshore Stimulation Equipment

Modular, portable, flexible system designed for offshore supply vessels.
FlexSTIM Offshore Stimulation System

Flexible, high-capacity, rapid stimulation system.