The accurate prediction of wellbore temperature distribution helps to accurately estimate well pressure profile and bottom-hole pressure (BHP) which is important in the under-balanced drilling (UBD) operation. In this paper effect of temperature variation due to heat transfer of drilling fluid with the formation and also oil and gas production from the reservoir into the annulus in under-balanc...

The application of sulphide scavengers is a widely adopted practice in production and processing operations in the Oil and Gas Industry. Particularly challenging is the search and development of new chemistries, which is aimed at safeguarding the health of personnel and maintaining good protection of materials under a variety of conditions whilst being environmentally acceptable. This paper inc...

We present a framework for sequential decision making in problems described by graphical models. The setting is given by dependent discrete random variables with associated costs or revenues. In our examples, the dependent variables are the potential outcomes (oil, gas or dry) when drilling a petroleum well. The goal is to develop an optimal selection strategy that incorporates a chosen utility...

Growing global operations of oil and gas (O&G) companies is leading to knowledge and content management challenges. Organizations are rethinking and redesigning their knowledge management (KM) strategies to be responsive to evolving market dynamics, such as technological innovations (like mobility, wireless communication and geographic information systems), an extension of offshore drilling, nu...

During exploration for oil and gas, a technical drilling fluid is used to lubricate the drill bit, maintain hydrostatic pressure, transmit sensor readings, remove rock cuttings and inhibit swelling of unstable clay based reactive shale formations. Increasing environmental awareness and resulting legislation has led to the search for new, improved biodegradable drilling fluid components. In the ...

Directional drilling systems generate complex curved boreholes in the earth’s crust for the exploration and harvesting of oil, gas and geothermal energy. In practice, boreholes drilled with such systems often show instability-induced borehole spiraling, which negatively affects the borehole quality and increases drag losses while drilling. This paper presents a dynamic state-feedback controller...

The recent oil and gas production boom in the contiguous United States generated tens of billions in additional royalty income for owners of oil and gas rights. We use the royalty income shock to study the local multiplier effect of unanticipated income and find that each royalty dollar received by county residents created an additional $0.50 in local income, mostly through greater wage income....

Abstract Results from cuttings transport tests in the laboratory using different field-applied oil-based drilling fluids with similar weight and varying viscosities are presented this paper. The designed for highly deviated wells, performance at relevant wellbore inclinations was investigated. experiments have been performed a flow loop that consists of 10-m-long test section 50.4 mm (2″) diame...

Africa is estimated to possess somewhere around 7 percent of the world’s proven crude oil reserves, according to the Energy Information Agency. It may have up to 24 billion barrels in total proven and unproven reserves. West Africa is generally viewed by the oil industry as one of the world’s leading deepwater offshore oil zones, with 633 fixed platforms, 13 floaters and 20 storage and offloadi...