Invert Emulsion Fluids for Drilling Through Narrow Hydraulic Windows

Gunnar, Fimreite; Arne, Asko; Jarrod, Massam; Knut, Taugbol; Omland, Tor; Svanes, Kåre; Wenche, Kroken; Espen, Andreassen; Arild, Saasen

doi:10.2523/87128-ms

Cited by 3 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The system was used to drill two wells offshore Norway. Performance data from offset wells will be presented that show ECD and torque values were significantly lower than comparable wells and no instances of particle settlement were observed [6].…”

Section: Introductionmentioning

confidence: 99%

Research and Application of Micronized Barite Drilling Fluid in HPHT Wells of the Western South China Sea

Cheng¹

2016

OGCE

View full text Add to dashboard Cite

When drilling wells in high temperature and high pressure (HTHP) fields, the drilling fluid properties are of utmost importance. If the viscosity of high density drilling fluid is too low, it will lead to barite sag and poor cuttings carrying capacity. However, lost circulation will occur due to high surge pressure and Equivalent Circulating Density (ECD) caused by high viscosity. High density drilling fluid performance is largely dependent on the use of the weighting material. The contradiction between rheological properties and barite sag of API Barite High Density Drilling Fluid (HABF) is great in the condition of HTHP. This article describes a novel weighting material that has resulted in a tenfold reduction in the particle size of API barite. With this micronized barite, the contradiction of high density drilling fluid can be solved. The rheology, sag stability and lubricity of high density drilling fluid weighted by micronized barite and API barite is investigated in the laboratory. And the mechanism of micronized barite to improve the performance of high density drilling fluid is discussed by using size distribution, surface charge, and microscopic shape method. Micronized Barite High Density Drilling fluid (HMBF) was first applied in two HTHP exploration wells with good gas show recently, which are in Western South China Sea. HMBF exhibited good rheological properties, sag stability and lubricity in the drilling process. Drilling task was successfully completed, without complicated situation.

show abstract

Section: Introductionmentioning

confidence: 99%

Research and Application of Micronized Barite Drilling Fluid in HPHT Wells of the Western South China Sea

Cheng¹

2016

OGCE

View full text Add to dashboard Cite

show abstract

Novel, Solids-Free, Oil-Based Drill-In Fluid Additive for High-Density Applications

Nielsen,

Baker,

Thompson

et al. 2024

SPE International Conference and Exhibition on Formation Damage Control

View full text Add to dashboard Cite

Reservoir Drill-In Fluids-(RDF's) minimize damage in Open-Hole completions from mud filtrate and the invasion of the near-well bore by insoluble solids. Solids are well-known to pose an undesirable risk to the completion process and the reservoir itself. This paper presents the development of a novel, oil-based additive for RDF's that provides density up to 16.5 PPG equivalent, with no solids in its neat form. As industry has begun to develop deeper, hotter wells, the need for fluids up to and including 16.5 PPG has increased. These fluids are generally purpose-designed for individual wells, after extensive testing and qualification to optimize non-damaging properties, while meeting drilling and completion criteria. These fluids commonly take two forms: (1) water-based, and (2) oil-external emulsion, based on reservoir properties, drilling difficulty, and environmental concerns. Historically, the low specific gravity of the base oils used in oil-based RDF's puts them at a disadvantage in meeting density targets above 13 PPG, while also maintaining drilling properties. Using novel chemistry to address this problem, we executed an extensive amount of formulation, testing, and evaluation of candidate molecules to address the need for a liquid weighting agent. The results from this development process include rheological, high-pressure high-temperature (HPHT) fluid loss, and other performance data. This novel chemistry has the potential to make a significant contribution to drilling performance and completion integrity, by delivering solids-free density to RDF formulations above 13 PPG.

show abstract

Barite-Sag Management: Challenges, Strategies, Opportunities

Scott

Zamora²,

Aldea³

2004

IADC/SPE Drilling Conference

View full text Add to dashboard Cite

fax 01-972-952-9435. AbstractBarite sag continues to be a recurring, potentially serious problem on many directional wells. Despite concerted efforts by the drilling industry and early progress, recent continued improvements in sag mitigation have been limited. Sag is a particular problem on HTHP wells and in deepwater wells where ECD management is required. These wells pose difficult drilling conditions where drilling practices may offset sag-management advancements.The sag "magic bullet" has thus far been elusive. This is understandable since sag is affected by many parameters and their interactions are difficult to quantify. While the importance of mud rheology is well known, attempts to find the key rheological parameter have not been completely successful. Furthermore, lack of industry standards to measure and report barite sag has limited the availability of usable field data. Sound engineering strategies and guidelines have helped, but clearly more developments are needed.The primary objectives of this paper are to (a) examine key barite-sag challenges, (b) characterize current best practices, and (c) discuss strategies, opportunities, and active programs for step improvements. Recent barite-sag case histories from the Gulf of Mexico, West Africa, and Atlantic Canada are included to set the proper perspectives.

show abstract

Invert Emulsion Fluids for Drilling Through Narrow Hydraulic Windows

Cited by 3 publications

References 7 publications

Research and Application of Micronized Barite Drilling Fluid in HPHT Wells of the Western South China Sea

Research and Application of Micronized Barite Drilling Fluid in HPHT Wells of the Western South China Sea

Novel, Solids-Free, Oil-Based Drill-In Fluid Additive for High-Density Applications

Barite-Sag Management: Challenges, Strategies, Opportunities

Contact Info

Product

Resources

About