A THREE-SEGMENT HYDRAULIC MODEL FOR ANNULAR CUTTINGS TRANSPORT WITH FOAM IN HORIZONTAL DRILLING  

作　　者：CHENG Rong-chao WANG Rui-he 

机构地区：[1]College of Petroleum Engineering, China University of Petroleum（East China）, Dongying 257061, China

出　　处：《Journal of Hydrodynamics》2008年第1期67-73,共7页水动力学研究与进展B辑（英文版）

基　　金：the National High Technology Research and Development Program of China (863 Program, Grant No. 2006AA06Z218); the National Natural Science Foundation of China (Grant No. 50574062).

摘　　要：Through mechanical analysis, an improved hydraulic model for annular cuttings transport with foam was established for horizontal drilling. Based on the two critical inclination angles, the entire well was divided into three segments. The Bagnold stress, generalized power law rheological model and modified hindered particle settling velocity in foam fluid were adopted in the model to improve the simulation accuracy. The proposed model allows more precise prediction of cuttings transport property in the whole range of well inclination angle. Model performance was examined via case study and experimental data. Simulation results given by the propulsion iteration and trial-and-error method agree well with in-situ horizontal well drilling practice for the case study, and the comparison between the model prediction and Capo’s experimental data shows satisfactory agreement.Through mechanical analysis, an improved hydraulic model for annular cuttings transport with foam was established for horizontal drilling. Based on the two critical inclination angles, the entire well was divided into three segments. The Bagnold stress, generalized power law rheological model and modified hindered particle settling velocity in foam fluid were adopted in the model to improve the simulation accuracy. The proposed model allows more precise prediction of cuttings transport property in the whole range of well inclination angle. Model performance was examined via case study and experimental data. Simulation results given by the propulsion iteration and trial-and-error method agree well with in-situ horizontal well drilling practice for the case study, and the comparison between the model prediction and Capo’s experimental data shows satisfactory agreement.

关 键 词：horizontal well foam fluid drilled cuttings hydraulic model well inclination angle 

分 类 号：TV13[水利工程—水力学及河流动力学]