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Prediction of wellbore trajectory considering bottomhole assembly and drill-bit dynamics

Journal Article · · SPE (Society of Petroleum Engineers) Drill. Eng.; (United States)
DOI:https://doi.org/10.2118/16172-PA· OSTI ID:5903544
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This paper presents a numerical dynamical model to predict wellbore trajectory in both the vertical and horizontal planes. The model is three-dimensional (3D) and consists of the idealization of the bottomhole assembly (BHA) into a number of finite elements. Inertia properties are included to predict the transient dynamic behavior of the assembly drilling. To ensure the correct boundary condition at the bit/rock interface, two rock/bit interaction models, one for a roller-cone bit and one for a polycrystalline-diamond-compact (PDC) bit, are developed. The time average of the rock/bit interaction force components is used to obtain an indication about the directional tendencies of the BHA. Examples of the rock/bit interaction forces for roller-cone and PDC bits and examples of the motion of a holding assembly for both bit types are given. The effects of hole inclination, weight on bit (WOB), rotary speed, and bit/stabilizer clearance are presented for an example of a building, holding, and dropping assembly. The deviation tendencies, as predicted by the model for several building and holding assemblies, are compared with field case data.
Research Organization:
Univ. of Tulsa, OK (US)
OSTI ID:
5903544
Journal Information:
SPE (Society of Petroleum Engineers) Drill. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Drill. Eng.; (United States) Vol. 4:2; ISSN SDENE
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
020300 -- Petroleum-- Drilling & Production
99 GENERAL AND MISCELLANEOUS
990230 -- Mathematics & Mathematical Models-- (1987-1989)
BOREHOLES
BOUNDARY CONDITIONS
CAVITIES
COMPARATIVE EVALUATIONS
DIRECTIONAL DRILLING
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DYNAMICS
EQUIPMENT
EVALUATION
FIELD TESTS
FINITE ELEMENT METHOD
HORIZONTAL INTEGRATION
INTERFACES
MATHEMATICAL MODELS
MECHANICS
NUMERICAL SOLUTION
ROCKS
TESTING
THREE-DIMENSIONAL CALCULATIONS
TRAJECTORIES
VERTICAL INTEGRATION