Investigation of Various ROP Models and Optimization of Drilling Parameters for PDC and Roller-cone Bits in Shadegan Oil Field

Abstract

According to the field data, there are several methods to reduce the drilling cost of future wells. One of these methods is the optimization of drilling parameters to obtain the maximum rate of penetration (ROP) in each bit run. Many parameters affect ROP like hole cleaning (including drillstring rotation speed (N), weight on bit (WOB), floundering phenomena, mud rheology), tooth wear, formation hardness (including depth and kind of formation), differential pressure (including mud weight (MW)), etc. Considering the geology and rock mechanical parameters, each part of well has different recommended parameters from the other parts. To optimize the drilling parameters, it is required that an appropriate ROP model to be selected until acceptable results are obtained. In literature, there are various applicable models to predict the ROP such as Bourgoyne and Young model, Bingham model and modified Warren model. It is desired to calculate and predict the proper model of ROP for roller-cone and PDC bits in each well by using the mentioned models and then verify the validity of each model by comparing with field data. Analyzing the drilling parameters by computer optimizationyields recommended range of parameters for each bit. The applications of present study are predicting the proper penetration rate, optimizing the drilling parameters, estimating the drilling time of well and eventually reducing the drilling cost for future wells.

Rotary steerable systems: mathematical modeling and their case study

“…Similarly, the ROP normal model ( f h (⋅) ) represents the rate of penetration with 90 degrees to the axial direction, or where F bit is the total bit force calculated by (1) applied by the RSS and the formation, and is the model parameter representing the factors like well path geometry, rock properties and so on. In the literature, there are several ROP models to calculate ROP v Eren (2011); Bataee et al (2010), for instance like Bingham model Bingham (1964), Teale model (Teale 2015) and Bourgoyne model (Bourgoyne et al 1986). In this study, Teale's model is used, given by ( 9) where is the friction coefficient, D is the bit diameter, A b is the wellbore area and E s is the specific energy of the rock.…”

A review on half a century of experience in rate of penetration management: Application of analytical, semi-analytical and empirical models

“…Using traditional ROP models is a conventional approach in ROP management studies (Bezminabadi et al, 2017). Either as an assistant model for artificial intelligence algorithms or as a basic ROP management tool, they have been used repeatedly (Bahari and Baradaran Seyed, 2007a;Rastegar et al, 2008;Bataee et al, 2010;Sui et al, 2013;Formighieri and Freitas, 2015;Kutas et al, 2015;Soares et al, 2016;Hegde et al, 2019). In this section, the history of developing different ROP models is reviewed and they are categorized in different subsections of RCB and PDC bits and also empirical correlations.…”

“…Later, Bingham (1964) modified the Maurer (1962) model to propose a new ROP model. Despite of its simplicity and neglecting the effect of hole-depth, this model was used in several ROP prediction studies (Bataee et al, 2010;Ayoub et al, 2017;. Mechem and Fullerton (1965) proposed an ROP model based on a drilling energy unit (i.e., WOB * N) which provided a basis for estimation of drilling operation costs, primary well management and ROP optimization process (Osgouei and Ozbayoǧlu, 2007).…”