Shell targets tight-gas plays with SCADAdrill drilling automation system

Posted on 23 July 2012

By Katie Mazerov, contributing editor

Shell’s SCADAdrill system for low-cost land wells is being tested in The Netherlands and in the Marcellus and Eagle Ford plays.

Shell’s SCADAdrill system for low-cost land wells will begin rolling out by the end of the year in tight-gas plays throughout the US if initial implementations are successful, according to Mark Anderson, manager of Drilling Mechanics Technologies for Shell. The system, which applies a Supervisory Control and Data Acquisition (SCADA) system to the drilling process, is being tested in The Netherlands and in the Marcellus and Eagle Ford plays.

Mr Anderson outlined the progress of the system in a presentation, “Drilling Automation Journey – Status Report” at the SPE Well Construction Automation workshop, 16-18 July in Vail, Colo. “With this system, a computer will control the drilling operations instead of a person on a joystick,” he said.

The concept of drilling automation has been around for decades, but only now is it coming to full fruition, he noted. Motivated by the need to increase drilling efficiency and improve safety on rigs, Shell is one of several operators testing integrated automated drilling systems.

While many of the newer-generation rigs feature automated pipe-handling systems and highly mechanized equipment, they do not necessarily have sophisticated automated control systems. “Automation is a step beyond mechanization,” Mr Anderson explained. “For example, mechanized equipment is now available to assist with tripping functions, but an individual is still controlling that machine. With mechanization, we can handle a variety of tasks; with automation, we have the control system do the same thing over and over. But whether the system is mechanized or automated, the industry is taking steps in the right direction.”

Developed in 2009, the prototype is an autonomous drilling and trajectory control system linked to the well plan. It monitors drilling parameters, determines appropriate controls that need to be communicated back to the rig and navigates the course of the wellbore. It was designed for low-cost land drilling in unconventional plays, where development involves thousands of the same kind of wells, Mr Anderson explained.

SCADAdrill allows the computer to perform simple, repetitive tasks, while the driller can monitor the operation and do higher-level activities such as preventive maintenance, crew competency, safety or planning.

Repetition key to automation

“These are land wells where there is a tremendous amount of repetition, which is a key requirement for automation. They are ideal for shale and coalbed methane fields, tight oil and gas and heavy oils, which require very high well density.” In that regard, the Eagle Ford was founds to be a suitable test ground because of the high number of wells being drilled.

Using SCADAdrill, the driller activates the system and is always in control, Mr Anderson said. Once turned on, the system starts the pumps and the rotation, then goes back to the bottom and drills a stand in rotary. When the bottom of the joint is reached, it circulates the appropriate amount of fluid and presents the tool joint at the correct height for the driller to disengage the system to allow the crew to set the slips and make the connection.

The system is being enhanced so it can eventually conduct directional drilling in a reliable and consistent way. In this mode, the system will start to drill, and when it needs to correct the actual well path to the pre-programmed, planned well path, it will automatically orient the tool face and slide the drill the required distance in the required tool face,” he explained. “When the directional run is completed, the system will automatically revert to rotary drilling.” The generic system is backward installable on any modern AC rig controlled by a programmable logic controller (PLC) but is not easily compatible with older-generation mechanical rigs.

The SCADAdrill prototype has been received with both keen interest and skepticism in the industry. “It’s important to understand that we’re not replacing humans with automatic drillers,” Mr Anderson continued. “The driller is always in control. We’re augmenting the simple, repetitive tasks the human driller does in a 12-hour shift by allowing the computer to perform these functions so the driller can monitor the operation and do higher-level activities such as preventive maintenance, crew competency, safety or planning.”

Leave a Reply

*

FEATURED MICROSITES


Recent Drilling News

  • 26 November 2014

    US EIA: Increase in energy demand requires 33 million bbl/day more oil

    The world is going to need one-third more oil between 2010 and 2040, with developing countries, such as China and India, accounting for a major portion in the increase in...

  • 25 November 2014

    Prescriptive Analytics prescribes how to complete wells to maximize production

    "Big data" is taking on a new role in industry, where companies are combining the findings from geology and geophysics with new data collected from advanced technologies...

  • 25 November 2014

    Petrobras completes drilling first appraisal well in Libra Consortium

    Petrobras recently completed drilling the first appraisal well in the Libra area, the 3-BRSA-1255 (3-RJS-731), known as NW1. Located in the Northwest portion of the Libra block, in the pre-salt layer of the...

  • 24 November 2014

    Ensign secures contracts for 2 ADR 1500S pad drill rigs in Montney area

    Ensign Energy Services has signed contracts for two of its new ADR 1500S pad drill rigs for a major operator in the Montney area of northeast British Columbia...

  • 21 November 2014

    Statoil cancels Stena Carron rig contract offshore Angola

    Statoil has decided to cancel the Stena Carron rig contract after fulfilling the work commitments in the Statoil-operated blocks 38 and 39 in the Kwanza basin offshore Angola...

  • Read more news