Archive of Texas PTTC Workshops
Sponsored by the PTTC Texas and Central Gulf Coast Regions

Controlling Sand Production Workshop

Wednesday, March 2, 2005
8:30 a.m. –12:30 p.m.
Houston Research Center, 11611 West Little York, Houston, TX

Who Should Attend?
All petroleum professionals involved in drilling and completion of wells, especially drilling, reservoir, completion, and production engineers and development geologists.

Agenda
8:30–9:00 a.m. Registration
9:00 a.m. Welcome and Introduction

9:15–10:15 a.m. Geomechanics Applictions for Sand Control: Dr. Lewis Lacy, Core Laboratories.
This seminar presents how laboratory-based rock mechanics is used in the petroleum industry to solve field problems, calibrate logs and to increase reservoir recovery associated with sand control. Laboratory-based rock mechanics concepts and equipment are explained and related to wellbore stability applications in the petroleum industry including horizontal and deviated wellbores. There are five laboratory based techniques that will be reviewed. These tests identify the weakest parts of the formation, determine when sand control is necessary, determine the critical draw down pressures and identify when sand production is initiated, calibrates logs for sand production and provides critical data for sand control.

10:30–11:30 a.m. Sand Screens: William K. Ott, P.E., Engineering Consultant
There are various types of sand screens used for sand exclusion including conventional wire-wrapped, prepacked and premium screens. Wire-wrapped screens offer an alternative for retaining gravel in an annular ring between the screen and the formation. The main advantage of welded or wire-wrapped screens that employ stainless steel wire is that they are more erosion and corrosion resistant than slotted pipe. Prepacked screens are a modification of existing wire-wrapped screens and represent the modular gravel pack. They consist of standard screen assembly with a layer of resin-coated gravel placed around it. Premium screens include a new generation of screens developed to address perceived problems with stand-alone completions such as plugging and erosion before wells are depleted.

11:30 a.m.–12:10 p.m. Frac Packs: Mladen Ruzic, Baker Oil Tools GCR
Frac packing has been a popular sand control technique since the early 1990s and provides highly reliable completions aimed at enhancing the productivity of gravel packed wells. The technique consists of incorporating a tip-screenout hydraulic fracturing treatment as part of the gravel packing procedure, thus stimulating the well trough effective removal of NWD. Almost all frac pack treatments have been performed in cased holes utilizing crossover tools, sand control screens and viscous cross-linked polymer based gels. Numerous modifications of this well established standard have been tried, including open-hole frac packs, applications of non-polymer fluids as well as “screenless” treatments. This presentation will focus on cased hole Frac Pack approach, where two well established techniques: Hydraulic Fracturing and Gravel Packing are used simultaneously in a way where key benefits of each are recognized and correctly applied.

12:10–12:30 p.m. Sand Control Technology for Open Hole Horizontal Wells: Steve Mathis, Baker Oil Tools
This segment of the presentation will center on Sand Control Options. Included are standalone screen completions, which must address annular flow challenges. Combining packers with standalone screen will be discussed at length, leading into expandable sand screens and horizontal gravel packing advantages. Recent developments and case study information lay the groundwork for the discussion.

For more information about this and other PTTC workshops, please contact Sigrid Clift at
512-471-0320 or e-mail sigrid.clift@beg.utexas.edu.