Rotating Jet Technology Improves Stimulation Fluid Placement to Effectively Treat Horizontal and Gravel Packed Wells – Lab model tests and global results are reviewed

摘要

Effective placement of stimulation fluids on horizontal, longinterval and/or gravel-packed wells is critical for cost-efficientproduction enhancement. Successful case history work in1999 1, using precision rotary jetting technology (R-Jet) on theend of coiled tubing (CT), demonstrated to the oil and gasindustry that fluid placement is a key factor in removing nearwellboredamage and optimizing well stimulation treatments.This paper will review continued efforts relating toprecision rotary jet technology including extensive laboratorytests using a full-scale gravel pack (GP) model. Tests werevideotaped for further visual study. Established guidelinesapplying lab results, computer modeling, and field validationprovide a well-engineered, non-damaging (low nozzlepressure) treatment for optimum stimulation performance.Proper damage identification coupled with skillful stimulationfluid design are important steps to a successful job and will behighlighted in the global R-Jet case histories.The data clearly shows that a highly effective method ofplacing stimulation fluids into a completion, such as sandcontrol screens or slotted liners, is to use CT-conveyed, rotaryspeed-controlled, forward-angled radial jets. This techniqueyields 360º coverage of the treatment area, is more efficientthan traditional bullheading and CT methods and allowsreduced treatment volumes to be considered. It applies to awide selection of completions including horizontal wellswhich can now be successfully stimulated at reasonable costs.