Wireline logging in a complex well profile, such as extended reach drilling (ERD) wells, presents many challenges for conveyance and data quality. Traditional pipe conveyed logging (PCL) or coiled tubing (CT) are prohibitive in terms of rig time, operational complexity and cost. Alternatively, tractor conveyance is limited by the available force in long laterals. Tools and accessories create higher friction and might jeopardize tool position in the horizontal section. Consequently, both data quality and reaching total depth are compromised. This paper details an innovative deployment technique using oriented wheels to address these challenges. The new centralizing system, comprised of bespoke wheeled carriages, takes a holistic approach to tool conveyance, reducing drag while ensuring optimum sensor orientation. Tool position is achieved through management of tool center of gravity, relative to the wheel axes. The idea of "centralizing by decentralizing" uses the wheeled carriages instead of bow spring centralizers. An eccentered counterweight is included to ensure the proper orientation of the logging sensors. In addition to improving data quality with proper centralization, the wheels minimize friction and the required force to push the toolstring when combined with a tractor. This enables the toolstring to safely and efficiently reach the well bottom and avoid multiple attempts and associated downhole failures. In the planning phase, calibrated software simulation parameters for this technique help to predict free-fall depth and required tractoring force. The wheeled carriages were deployed in an ERD well for cement evaluation across a 9-5/8" casing and could reach a world record of 85° by gravity. The reduced friction and optimized tool position resulted in higher tractor force margins; and so a net gain in the overall tractoring distance. Also, the low drag and surface tension enabled a sufficient pull capacity with a minimum drive combination. For data acquisition, this deployment enabled a minimum eccentricity, resulting in better cement evaluation data quality and reduced uncertainty related to interpretation. In addition to these benefits, a tangible and direct savings of rig time has improved safety, operational efficiency and well delivery KPIs. Oriented wheels with tractors were deployed in other challenging environments and showed consistent and reliable results. This innovative technique can be deployed in both open-hole and cased-hole with fitted design depending on the borehole size, well profile and complexity of the toolstring configuration.

More wells are being completed with fiberglass casings to overcome the challenge of corrosion to the carbon steel casings. Fiberglass casing is expected to increase the longevity of the wells. The wells completed with fiberglass still require the operators to confirm that the casing is in good condition and also the annular cement sheath is able to provide mechanical support and zonal isolation. The evaluation poses a challenge as the properties of the fiberglass are very different to that of the carbon steel casing. Some studies were performed in 2018 to test the ultrasonic physics in fiberglass, this paper will describe the challenges and how we have now developed an innovative data acquisition, processing and interpretation workflow to properly evaluate both the fiberglass casing condition and as well the annular cement condition. It was observed through surface experiments that the conventional ultrasonic technique applicable to carbon steel pipes has been proven to be invalid in fiberglass casings because the velocity and acoustic impedance of fiberglass are much lower than steel; therefore, there is no resonance in fiberglass. A new interpretation workflow was developed and applied to raw data to build specific parameters proper to the fiberglass samples to determine the acoustic properties: acoustic impedance, attenuation factor and velocity. It is for the first time that data has been acquired in a very large fiberglass casing. Fiberglass casings were run in water well, and wireline acoustic logs were successfully acquired for cement and corrosion evaluation across 19-inch. OD Glass Reinforced Epoxy pipes. The interpretation workflow was applied to raw field data and a comprehensive cement map and corrosion answer products were obtained with an acceptable quality control level. The paper will review the data from three wells. This innovative data acquisition, processing, and interpretation workflow can be deployed in wells for decision making prior to completion and production. The new method also opens up future opportunities for the evaluation of non-carbon steel pipes, and with knowledge of mechanical and acoustic properties, the method can be adapted to perform a full evaluation. This method is expected to provide valuable information for wells planned to be completed with fiberglass casing.

More wells are being completed with fiberglass casings to overcome the challenge of corrosion of the carbon steel casings. Fiberglass casing is expected to increase the longevity of the wells. The wells completed with fiberglass still require the operators to confirm that the casing is in good condition and also the annular cement sheath is able to provide mechanical support and zonal isolation. The evaluation poses a challenge as the properties of the fiberglass casing are very different from those of the carbon steel casing. Studies were performed in 2018 to test the ultrasonic physics in fiberglass, and this paper describes the challenges and how we developed an innovative data acquisition, processing, and interpretation workflow to properly evaluate both the fiberglass casing condition and the annular cement condition. It was observed through surface experiments that the conventional ultrasonic technique applicable to carbon steel casing is not valid for fiberglass casing because the velocity and acoustic impedance of fiberglass are much lower than they are for steel; therefore, there is no resonance in fiberglass. A new interpretation workflow was developed and applied to raw data to build specific parameters for the fiberglass samples to determine the acoustic properties: acoustic impedance, attenuation factor, and velocity. It is for the first time that data have been acquired in a very large fiberglass casing. Fiberglass casings were run in a water well, and wireline acoustic logs were successfully acquired for cement and corrosion evaluation across 18-in. and 10-in. fiberglass casings. The interpretation workflow was applied to raw field data, and a comprehensive cement map and corrosion answer products were obtained with an acceptable quality control level. The paper will review the data from three wells. This innovative data acquisition, processing, and interpretation workflow can be deployed in wells for decision making prior to completion and production. The new method also opens up future opportunities for the evaluation of noncarbon steel casings, and, with knowledge of mechanical and acoustic properties, the method can be adapted to perform a full evaluation. This method is expected to provide valuable information for wells planned to be completed with fiberglass casing.

Water Shut-Off (WSO) solutions are in constant improvement. This paper shares the experience of integrating PLT, CTU, and packer Real-time technologies together in multidisciplinary team and integrated workflows to minimize the uncertainty and maximize the success rate of Rig-less WSO in horizontal open-hole wells completed with passive Inflow Control Devices (ICD) as first time ever in Kuwait, to extend the natural flow life which in turn reduces oil production deferment waiting for slot in busy rig work-over schedule.Water conformance represents common challenge in oilfield industry which increases with the field maturity especially in water flood and active water drive reservoirs. Water production has significant impact on production economics, facilities, adding more challenges to the development of such oilfields.Sabriyah field, most challenging oilfield in North Kuwait, produces from Lower Burgan (LB) Cretaceous Sandstone reservoir which experiences water conformance issues due to water flood and active water drive respectively.Strategy of drilling horizontal open-hole wells completed with passive ICDs in LB reservoir was adapted early 2012 as trial to delay water breakthrough via achieving higher productivity over conventional vertical wells and in turn be able to produce same average production rate at much less and balanced drawdown. However, some wells have shown increased water cut (WC), which constrained their natural flow capability and hence need for rig work-over for WSO and/or conversion to artificial lift.WSO is a common practice in the field but complicity increases in horizontal completions. The main challenge during WSO treatment is the proper diagnosis and full understanding of the water mechanism for selecting the efficient treatment design, which is crucial for a sound decision making considering the associated cost and the operational complications especially in horizontal wells.Process outline: WC monitoring, identification of water source using horizontal PLT, Water Saturation logs, reservoir understanding, production modeling and nodal analysis, identifying best WSO intervention technology, isolation depth and operation design then execution and post job evaluation.The production analysis utilizing horizontal PLT technology, Water Saturation and open-hole logs supports inflow profiling and identification of water entries in horizontal ICD compartments. Hence, better problem understanding and proper decision making for where to isolate using Rig-less Real-time CTU and inflatable packer technology in three wells to-date with following results:• Significant oil gain/restore and WC reduction. • Extending natural flow life and postpone need for rig work-over. • Less water on facility side allowing more production capacity.• Saving reservoir energy.The integration of inflow profiling, water saturation, Real-time intervention new technologies and multidisciplinary team collaboration led to excellent execution of rig-less WSO in horizontal passive ICD completions in North Kuwait.