Improve water shutoff strategy

In a Middle Eastern field, the operator worked over and completed a well as a horizontal openhole producer. After initial production, the well started producting with water cut, which increased gradually to 24.1% of 2,400 bbl/d. For wells with this problem, the operator traditionally performed wireline logging cable–equipped CT jobs to understand the well production profile. The logistics for this type of intervention often took several months or even years, making remedial work difficult in the face of changing well conditions. Because logging results were not current, CT interventions needed to be optimized.

Combine production logging and intervention

To improve the effectiveness of its remedial work, the operator sought a Schlumberger solution because of the company’s expertise with fiber optics. ACTive PS integrated production logging service was chosen as a trial for the well. This service enables wireline production logging tools, such as FloScan Imager horizontal and deviated well production logging system, to be run by the optical telemetry of ACTive in-well live performance. With the ACTive PS system, CT intervention and real-time production logging can be performed with the same CT unit.

The operator ran the ACTive PS service with the FloScan Imager system for logging. The toolstring comprised several sensors, such as gamma ray, casing collar locator (CCL), pressure, and temperature. It reached a maximum depth of 9,848 ft, with cross sections captured at 6,820 and 9,140 ft. No crossflow was detected during shut-in, and passes were repeated to ensure data quality.

Optimize remedial operations

Using the ACTive PS system allowed the operator to gather high-quality FloScan Imager data, making it possible to schedule and perform production logging and CT remedial jobs together. The acquired data showed clear points of water entry and a multispinner flow profile, proving critical for remedial water shutoff jobs to maximize productivity and save the cost of water production.