Pushing the Envelope of HT Drilling Fluids: Development and Field Applications of a Novel Non-Aqueous Drilling Fluid in the Gulf of Thailand

Charnvit, Kerati; Kongto, Abhijart; Huadi, Fransiskus; Sharma, Sunil K.; Simon, Gerard A.; Estes, Brent; Trotter, Neil

doi:10.2118/158680-ms

Cited by 3 publications

(1 citation statement)

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“…Charnvit et al [117] suggest the following criteria to be considered when applying emulsifiers to HPHT applications: (1) it must withstand high temperature, (2) must provide low viscosity, (3) has stable emulsion (low and flat gel structure), and (4) must contribute to HPHT filtration control and temperature stability of the system.…”

Section: Emulsifiers Selection For Hpht Applicationmentioning

confidence: 99%

Nanomaterial-Based Drilling Fluids for Exploitation of Unconventional Reservoirs: A Review

et al. 2020

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The world’s energy demand is steadily increasing where it has now become difficult for conventional hydrocarbon reservoir to meet levels of demand. Therefore, oil and gas companies are seeking novel ways to exploit and unlock the potential of unconventional resources. These resources include tight gas reservoirs, tight sandstone oil, oil and gas shales reservoirs, and high pressure high temperature (HPHT) wells. Drilling of HPHT wells and shale reservoirs has become more widespread in the global petroleum and natural gas industry. There is a current need to extend robust techniques beyond costly drilling and completion jobs, with the potential for exponential expansion. Drilling fluids and their additives are being customized in order to cater for HPHT well drilling issues. Certain conventional additives, e.g., filtrate loss additives, viscosifier additives, shale inhibitor, and shale stabilizer additives are not suitable in the HPHT environment, where they are consequently inappropriate for shale drilling. A better understanding of the selection of drilling fluids and additives for hydrocarbon water-sensitive reservoirs within HPHT environments can be achieved by identifying the challenges in conventional drilling fluids technology and their replacement with eco-friendly, cheaper, and multi-functional valuable products. In this regard, several laboratory-scale literatures have reported that nanomaterial has improved the properties of drilling fluids in the HPHT environment. This review critically evaluates nanomaterial utilization for improvement of rheological properties, filtrate loss, viscosity, and clay- and shale-inhibition at increasing temperature and pressures during the exploitation of hydrocarbons. The performance and potential of nanomaterials, which influence the nature of drilling fluid and its multi-benefits, is rarely reviewed in technical literature of water-based drilling fluid systems. Moreover, this review presented case studies of two HPHT fields and one HPHT basin, and compared their drilling fluid program for optimum selection of drilling fluid in HPHT environment.

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Section: Emulsifiers Selection For Hpht Applicationmentioning

confidence: 99%

Nanomaterial-Based Drilling Fluids for Exploitation of Unconventional Reservoirs: A Review

et al. 2020

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Application of multifunctional wellbore cleaning fluid in the removal of residual drilling fluids in ultra-deep wells: Research progress and prospects

Song,

Guo,

et al. 2024

Geoenergy Science and Engineering

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New Generation Ultra-High Temperature Synthetic-Based Drilling Fluid; Development and Best Practices for Extreme Conditions and ECD Management

Marinescu

Young

Iskander

2014

Abu Dhabi International Petroleum Exhibition and Conference

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In the last years the quest for hydrocarbons findings moved into extreme drilling condition, such as ultra-deep waters, ultra-high temperatures and drilling fluids densities. Adding to these the very narrow density windows (reservoirs with very low differential fracture pressure - pore pressure), both operators and drilling fluids service companies faces increased challenges to deliver the well for production. It is common that for such applications the bottom-hole static temperature is over 180°C/356°F, even reaching temperatures in excess of 250°C/482°F in some fields, acid gases (CO2, H2S) are also present, so the list of challenges is formidable. In this paper, the authors details the common challenges for such extreme conditions wells and best practices, present a new generation synthetic-based fluid capable to withstand temperatures in excess of 500°F/260°C, as well as a unique hydraulics engineering calculations software which enable real time equivalent-circulation density (ECD) calculations. The design and development of the mew ultra-high temperature mud system is presented and its components. At the core of the system it is a new amine-free emulsifier, which is stable to temperature above 300°C/572°F. In addition, the authors will present the extensive lab work required to optimize the formulation for high densities and extreme high temperatures, detailing also the critical fluids engineering guidelines for drilling in such harsh conditions. Using laboratory, field, and computer data, the authors will demonstrate the effectiveness of the new fluid in delivering optimum drilling in extreme HTHP conditions. Also, it is illustrated how the rheology is maintained at minimum level with a micron-size weighting material, and the engineering software used for pre-planning and while drilling to accurately calculate the ECD and maintain it within the required range.

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Pushing the Envelope of HT Drilling Fluids: Development and Field Applications of a Novel Non-Aqueous Drilling Fluid in the Gulf of Thailand

Cited by 3 publications

References 1 publication

Nanomaterial-Based Drilling Fluids for Exploitation of Unconventional Reservoirs: A Review

Nanomaterial-Based Drilling Fluids for Exploitation of Unconventional Reservoirs: A Review

Application of multifunctional wellbore cleaning fluid in the removal of residual drilling fluids in ultra-deep wells: Research progress and prospects

New Generation Ultra-High Temperature Synthetic-Based Drilling Fluid; Development and Best Practices for Extreme Conditions and ECD Management

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