COILED TUBING PERFORMANCE FOR HORIZONTAL AND DEVIATED WELLS IN SELECTED NIGER DELTA RESERVOIRS

ABSTRACT

 Generally Coiled Tubing operation has been on steady increase for post drilling completion operations such as well clean-up, balance/under balance washing, stimulation, production logging and testing especially in horizontal wells. In order to establish the feasibility of CT- assisted operations, a comprehensive engineering analysis which predicts the CT mechanical performance and its penetration limit is carried out. The predictive mathematical technique procedure was applied to a typical two-dimensional horizontal well (i.e. with a Constant azimuth) along three major paths: (i) Identification of the well and Coiled Tubing mechanical data. (ii) Estimation of the CT hydraulic limit. (iii) Prediction of the limit of penetration (LOP) of CT in the horizontal well completion with a sensitive analysis of the LOP based on variable pipe frictional coefficients.