PREDICTION OF RATE OF PENETRATION IN ROTARY STEERABLE SYSTEM DRILLING USING STATISTICAL APPROACH
Mohamed Mohamed Refat Ali Rageh;
Abstract
Directional and horizontal drilling have now become an essential element in oilfield development, both in onshore and offshore operations. There are several types of deflection tools; the most common of which are downhole motors (PDM) and rotary steerable system (RSS). A rotary steerable system (RSS) employs specialized downhole equipment to replace mud motors. A rotary steerable system (RSS) is able to make continuous changes in inclination and azimuth without interrupting drilling operations. It produces a cleaner and smoother wellbore while reducing drag, improving the transfer of weight on bit and increasing the rate of penetration.The RSS system offers the potential to drill safe and faster sections due to the fact that no time is wasted in orienting the toolface prior to drilling especially in extended reach drilling where tool orientation is particularly difficult.
There are many challenges to drill a directional well compared to a vertical well, such as limitation in weight on bit, hole cleaning, trajectory control, etc., this lead to difficult selection to the proper parameters to increase the rate of penetration.
Prediction of ROP is necessary for planning and cost estimation. ROP depends mainly on operational variables and formation types.
In the present study, the effective parameters on directional drilling of ten wells, drilled between 2007 and 2015 in Egypt are used to predict the rate of penetration using RSS drilling. This is accomplished using various statistical approaches including R-Squared method, SPSS statistical software, and Buckingham π theorem. Additional five directional wells from the Middle East area, drilled between 2011 and 2016, are used to verify the prediction model.
Results showed that the prediction model derived using Buckingham statistical approach is capable to predict the rate of penetration of RSS in directional wells with 85% match for the wells drilled in Egypt and 98% - 99.6% for the wells drilled in the Middle East area. Such results indicate the potential use of the proposed prediction model for evaluating the economics of RSS in drilling directional and extended reach wells.
There are many challenges to drill a directional well compared to a vertical well, such as limitation in weight on bit, hole cleaning, trajectory control, etc., this lead to difficult selection to the proper parameters to increase the rate of penetration.
Prediction of ROP is necessary for planning and cost estimation. ROP depends mainly on operational variables and formation types.
In the present study, the effective parameters on directional drilling of ten wells, drilled between 2007 and 2015 in Egypt are used to predict the rate of penetration using RSS drilling. This is accomplished using various statistical approaches including R-Squared method, SPSS statistical software, and Buckingham π theorem. Additional five directional wells from the Middle East area, drilled between 2011 and 2016, are used to verify the prediction model.
Results showed that the prediction model derived using Buckingham statistical approach is capable to predict the rate of penetration of RSS in directional wells with 85% match for the wells drilled in Egypt and 98% - 99.6% for the wells drilled in the Middle East area. Such results indicate the potential use of the proposed prediction model for evaluating the economics of RSS in drilling directional and extended reach wells.
Other data
| Title | PREDICTION OF RATE OF PENETRATION IN ROTARY STEERABLE SYSTEM DRILLING USING STATISTICAL APPROACH | Other Titles | التنبؤ بمعدل الحفرلنظام الدوارة الموجه (RSS)بإستخدام الطرق الإحصائية | Authors | Mohamed Mohamed Refat Ali Rageh | Issue Date | 2017 |
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