Summary In the placement process of cement slurry, treatment fluids such as spacer are pumped ahead cementitious slurry to minimize contamination by drilling fluid and ensure superior bonding casing formation. The discussed in this work can harden with time act a settable spacer. This characteristic be an advantage for well integrity if some pockets left annulus. Rheological compatibility diffe...

I this paper, we develop a practical and flexible framework for evaluating sequential exploration strategies in the case where the exploration prospects are dependent. Our interest in this problem was motivated by an oil exploration problem, and our approach begins with marginal assessments for each prospect (e.g., what is the probability that the well is wet?) and pairwise assessments of the d...

numerous parameters influence bit selection process, which considering all them is not normally feasible. existing methods use limited number of these parameters to choose a suitable bit for a specific drilling condition. one of the widely used methods is cost per foot. specific energy and drilling strength are another methods currently used for bit selection. different methods of bit selection...

In this paper we consider the problem of optimally selecting a set of k nodes in a node-weighted graph, under the requirement that the subgraph induced by the set of nodes selected is connected. This problem arises in a Norwegian oo-shore oil-drilling application. We show this problem to be NP-complete on general graphs, but provide a polynomial time algorithm to nd an optimal solution for tree...

Large amount of drilling waste associated with the expansion of the Orinoco Oil Belt (OOB), the biggest proven reserve of extra-heavy crude oil (EHCO) worldwide, is usually impregnated with EHCO and highly salinized water-based drilling fluids. Oxidative exoenzymes (OE) of the lignin-degrading enzyme system (LDS) of fungi catalyse the oxidation of a wide range of toxic pollutants. However, very...

We propose JackVR, an interactive immersive simulation prototype aiming to train domain experts to land jackup oil rigs. Jackup rigs are among the most common offshore drilling units for extracting oil, but the process of landing the rigs is mostly challenging because of the unpredictable sea and weather conditions, lack of clear vision, and the possible risk of damaging the ocean floor. We des...

In China’s unconventional oil drilling, horizontal wells are one of the main forms water-in-oil drilling fluid have been widely used due to their stable performance and excellent lubricating properties. To reduce high cost fluids at site, further pressure cuttings processing, meet requirements environmental protection, an oil-based system with a low oil-water ratio was developed. Based on resea...