... collapse issue. With more data available, the condition of the well can be easily understood in the future. geology investigation cement condition information casing and cementing cement data 8-inch liner drilling report geologist cement integrity isolation dual layer cement evaluation...

... Abstract An operation in Malaysia successfully implemented coiled tubing (CT) expandable steel patches to isolate upper depleted zones so that lower gas zones could be produced. This serves to prove the technique as a method that can be used in top-down gas production isolate & perforate...

... efficiency upstream oil & gas well logging redefining well abandonment strategy frequency spectrum amplitude vendor ray abandonment schematic steel barrier cement bond logging isolation requirement log analysis execution deployment greater cost cement integrity assessment Introduction...

...Introduction Plug and abandonment for the operator in Brunei Darussalam involves having a permanent isolation at the caprock (typically a shale formation) placed at a depth where the formation has a rock strength and ability to withstand the maximum anticipated pressure for long term isolation...

... of the well fails to provide the required isolation. Cemented sections are important barrier systems where failure of isolation can cause numerous issues such as emission to surface, undesired water production, depletion of gas drive mechanism, loss of production to the neighboring zones, contamination...

... placement efficiency. The zones were also distanced from one another, requiring zonal isolation (i.e., mechanical isolation, such as bridge plugs, was not an option) as treatments were deployed. While there was a major challenge in terms of mobilization planning to complete this well during the peak...

... Abstract Following the successful proof of concept of the closed system dual casing perforate, wash and cement for environmental plug application in 2018 (SPE-193989-MS), the same system was optimized for 2 subsea wells to isolate a gas sand behind 2 casings (9-5/8" × 13-3/8" × 16" open hole...

... & Gas mechanism zonal isolation coal seam gas water level CSG Operator gauge reservoir selection criteria operator society of petroleum engineers isolation application cable case study ground water movement gauge packer CSG reservoir installation completion installation and operations...

... to proper cement isolation behind casing. In a deepwater development campaign offshore Malaysia, cement isolation behind the 9-5/8" production casing serves as critical barrier to ensure well integrity throughout the production lifecycle. To achieve this, the authors have deployed a structured approach...

... annular pressure drilling Simulation drilling fluid management & disposal circulation drilling fluids and materials isolation well control Upstream Oil & Gas cementation MPC water injector well hydrocarbon zone ECD stage collar unconventional technique overcome narrow...

... undesirable. Depending upon the nature of the zone, one effective solution to this issue is chemical isolation. This paper undertakes this issue, discussing a case study of a successful zonal isolation operation using an organically crosslinked polymer sealant in a fractured zone with a gravel pack and screen...

... in an injector well. A low concentration, low viscosity delayed crosslinker gel system employing partially hydrolyzed polyacrylamide (PHPA) exhibiting 12-14% degree of hydrolysis level with chromium acetate as crosslinker offering delayed gelation time was used to selectively isolate one of the payzones. A non...

... to a previously producing well in a challenging application. The paper will also include relevant notes on operational time optimization derived from the field implementation as well as pre and post-treatment production information. The paper describes details on overcoming the challenge of effectively isolating...

... with risk base analysis. isolation Upstream Oil & Gas Preservation operation xmas tree non productive asset project management inspection maintenance strategic planning and management platform maintain integrity gt preservation society of petroleum engineers execution gts-h...

... petrophysical property of coal should be factored into the design to meet the basic tenets of primary cementing (i.e., zonal isolation and casing support). This paper presents cement design considerations, case histories, and best practices developed during the course of seven years of cementing operations...

... completion design. Swell packer is one of the technology that widely used in open-hole completion strategy with combination of others completion accessories. Coupling the swell packer with open-hole completion application, it makes multiple zonal pressure isolation in the following open-hole completion...

... bridge plug release Detecting and counting shots of perforation clusters Detecting landing of the isolation ball Determining by analysis of reflected waves any isolation ball failures Detecting a leak in casing and determine its measured depth Detecting restriction and determining its...

... Abstract Well integrity has an utmost importance for upstream operations that has resulted in many studies to improve zonal isolation. Few papers comprehensively investigated the elements involved in cementing service delivery that are conducive to both well integrity and zonal isolation...

... Abstract Challenging wellbore conditions in an offshore well in the Northern Territory, Australia led an Operator and Cementing Service Company to pursue a sophisticated approach to achieve zonal isolation on the critical 9–5/8-in. casing cement job. Some of the specific well challenges prior...

... conditions. Placement and isolation techniques were challenging, particularly with the existence of multiple zones of interest. Therefore, coiled tubing (CT) well intervention methods were selected for best placement without resorting to a more expensive workover option. The results of the treatment were...