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CASE STUDY

Halliburton Technology Helps Identify Dual-String Casing Integrity

Single-trip logging run avoids expensive workover And minimizes rig time

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Opportunity

Mature Fields

Opportunity
Specific Challenge

Identify corrosion and casing integrity in a single run

REGION - LAND OPERATIONS, DENMARK REGION - LAND OPERATIONS, DENMARK

Denmark

REGION - LAND OPERATIONS, DENMARK

Challenge

  • Customer had been unable to evaluate the casing integrity of a second string (133 ⁄8 in.) in its gas storage caverns

Solution

  • Deploy the Halliburton Mono conductor Electromagnetic Pipe Xaminer® (EPX™ V) tool in combination with the Multifinger Imaging Tool (MIT) to assess the 95 ⁄8- and 133 ⁄8-in. casing integrity and casing corrosion 

Result

  • Able to provide assurance that well integrity was sufficient to prevent any requirement for workover or tubing replacements

Overview 

Halliburton had carried out several casing integrity measurements over the past two years for an underground gas storage company in Denmark. As the main wireline provider, Halliburton had successfully used Xaminer® Electromagnetic Corrosion Tool (XECT) and Multifinger Imaging Tool (MIT) technology to verify casing integrity. This provided acceptable evaluation in 95 ⁄8-in. casing, but would require two separate runs. With the introduction of the new Electromagnetic Pipe Xaminer® V (EPX™ V) tool, Halliburton is able to evaluate up to five strings of casing, including in this instance 133 ⁄8-in. casing. With its combinability with MIT technology, a detailed investigation of the casing was achieved in one run.

Challenge

Previously, the customer had been unable to evaluate the casing integrity of a second string (133 ⁄8 in.) in its gas storage caverns. The ability to complete everything in one day was a critical requirement. With pressure-control equipment rig ups and two to three runs of wireline, casing integrity checks can often take more than one day to be completed. 

Solution

Halliburton proposed the use of the EPX V/MIT tool string to log the internal condition of the 95 ⁄8-in. casing and provide the overall condition of 95 ⁄8-in. and 133 ⁄8-in. casing in one run. This new tool combination would allow single-trip deployment where previous deployments had entailed two trips and were unable to evaluate the 133 ⁄8-in. casing. Additionally, the tool’s slim housing (111⁄16-in. OD) permits through-tubing access, offering an extended range of operation for quantitative analysis of up to five tubulars from 23 ⁄8 to 24 in. OD pipe.

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