Case Study: Boots & Coots Successfully Controls Well Release in Remote Field

Team solves challenging logistics to control gas release prior to well abandonment Challenge – The operator contacted Boots & Coots after a gas leak through one leg of the completion string was reported. Well control specialists were immediately mobilized to the location, and they performed the initial site inspection while simultaneously organizing a well control response plan for the incident. The main obstacle for organizing and executing any...

Tech Paper: Wellbore Placement in the Middle Bakken Formation Using an Azimuthal Gamma-Ray Measurement

Identify shearing or faulting early using an azimuthally sensitive natural gamma-ray tool The Bakken formation is a large, unconventional resource located in North Dakota. Horizontal wells are drilled from pads at tight spacings, and placement within the target formation is critical to ultimate recovery rates. Geologic placement is established by evaluating the natural gamma-ray tool response and comparing it to a representative gamma-ray log from a...

Case Study: SentinelCem™ Cement Cures Losses in Iraq Wells

Cement treatment saves operators millions of dollars annually Challenge – For years, operators drilling in the Rumaila, Zubair, and West Qurna fields in southern Iraq have routinely experienced severe and even total circulation losses at depths of 450–750 meters (1,476–2,461 feet). Underlying these fields is the karstified dolomite of the Dammam Formation, which has geological characteristics that include caverns, vugs, and large fractures. Encountering these voids...

Tech Paper: First Successful Cuttings Reinjection CRI Operation in Ecuador: An Alternative to Help Minimize the Environmental Impact in a Protected Area

Fully integrated process represents permanent drilling solution in environmentally sensitive areas This paper discusses a technology for waste management and disposal through cuttings reinjection (CRI). The fully integrated process was successfully applied in the Ecuador Apaika-Nenke field, which is an area with significant oil potential located in the heart of a protected biodiverse zone. The advantage of the applied process, from candidate selection screening to the...

Case Study: Operator Achieves More Reservoir Insight Using a New Azimuthal Gamma Ray Service

Azimuthal gamma-ray images uncover stratigraphic features in a seemingly featureless unconventional reservoir Challenge – Unconventional resources are often costly to produce as a result of the need for hydraulic fracturing. In order for these shale plays to be considered economical, drilling costs must be kept to a minimum, and many operators drill and geosteer wells with only average gamma-ray measurements obtained from a logging-while-drilling (LWD) tool....

Tech Paper: Mapping the Bakken with Azimuthal Gamma Ray

New, cost-effective measurement allows for better unconventional well placement in difficult-to-interpret situations This paper defines current geosteering practices in the Middle Bakken formation using conventional gamma-ray detectors and discusses the use of a new azimuthally sensitive gamma-ray sensor for more accurate well placement in the target formation. Two wells were drilled in the Middle Bakken formation using both a conventional gamma-ray detector and a new azimuthally sensitive...

Case Study: PetroGuard® Openhole Shunt System Ensures Gravel-Pack Success for TOTAL’s Four-Well Batch Completion

Shunt contributed to 100 percent pack efficiency despite challenging openhole conditions CHALLENGE – TOTAL performed several internal studies to determine the most appropriate lower completion solution for its wells. It was identified early on that the four-well campaign required openhole gravel packs to successfully retain and control the formation sands. Additionally, hydraulic simulations were performed and sensitivities were used to assess the potential to successfully execute...

Case Study: Well Construction Performance Shaves More Than Eight Days Off of Plan in Rumaila Field

Solution optimizes drilling time while lowering costs CHALLENGE – Halliburton was challenged to design, drill, and deliver wells in the Rumaila field – and to do this safely, efficiently, on time, and within the allocated budget. The geology in the field presented significant obstacles, including losses within naturally vuggy or fractured formations, challenges of drilling through highly reactive shale sequences with borehole instability issues, and depleted...

Tech Paper: Numerical Maximization of the Secondary Polymer Flooding Value in a Mature, Offshore, Heavy Oil Reservoir

Methodology helps improve the chances of finding the maximum net present value solution Successfully implementing polymer flooding and maximizing benefits requires selecting best options of variables such as polymer concentration and slug, and number and location of new wells. Option-decisions combined generate thousands of scenarios. Therefore, even using smart algorithm optimizers to efficiently find the maximum of a business objective mathematical function can be a very...

Case Study: Operator Successfully Runs 5 ¾-inch Slim-Hole Drilling Operation with Geo-Pilot® RSS System

Innovative solution drills one of the longest slim sections (5,500 feet) on Norwegian Continental Shelf CHALLENGE – In the previous operation of this ERD well, an expandable liner had been set to address formation instability. This expandable liner created a challenge, since the liner’s internal diameter was only 5.795 inches, which is extremely narrow. The wellbore’s narrow opening required a slim-version drill bit and the rotary...