Consolidation for Screenless completions and Proppant-Flowback Control in Hot Wells

摘要

This paper describes the evaluation and field application of a propant-consolidation system (as a resin-coated proppant(RCP) is otherwise known) that was developed for treating high-temperature wells (i.e., >=175deg F). Propant treated with the new high-temperature liquid coating will be called HTL-RCP for the purposes of this paper. The HTL-RCP system is unique in that it is a single-liquid treatment that is used to coat proppants on-the-fly during a treatment on location without the need for specialized metering equipment. The coating promotes adhesion between proppant grains to such an extent that even if the well is flowed back immediately after a treatment, it still cures to give a high-strength consolidation. This paper presents the results of field tests, the evaluation of treatments for proppantflowback control in tight formations, the application of screenless completions in high-permeability formations, consolidation tests, and breaker-compatibility studies, all of which were conducted under simulated treatment and downhole conditions. The paper describes the development of rock-mechanical testing that was performed to help the prediction of long-term consolidation properites under production conditions of closure stress, cycling, and high bottomhole temperatures (BHTs).