Technical Papers

Tech Paper: Improving Fiber-Optic System Reliability in Permanent Installations

Monitoring the health of fiber-optic system can save time and money Permanent installation of fiber-optic (FO) sensors, whether discrete or distributed, provides beneficial monitoring of a wide variety of parameters during every stage of a well’s useful life—from drilling and completions, through the productive period, up to and including permanent abandonment—assuming that the sensors do not fail during installation or subsequent wellbore intervention operations. Long-term reliability...

Tech Paper: Efficient Use of Data Analytics in Optimization of Hydraulic Fracturing in Unconventional Reservoirs

Understanding reservoir parameters can help successfully optimize fracturing treatments per well Hydraulic fracturing operations affect reservoir flow dynamics and increase production in unconventional tight reservoirs. The control of fracture growth and geometry presents challenges in formations in which the boundary lithologies are not highly stressed in comparison to the pay zone, thus failing to prevent the upward migration of fractures. Several factors influence the growth and...

Tech Paper: Nonexplosive Tubing Perforator Offers Controlled Cost-Effective Solution for Through-Tubing Gas Lift Installation

User friendly mechanical perforator eliminates need for explosives, helping to improve safety and reduce rig time An operator in Baku, Azerbaijan was planning to create a gas lift configuration and needed to perforate 7-in., 32-lbf, 13% chrome, up to 0.51-in.wall thickness, heavy wall tubing without explosives. A nonexplosive mechanical tubing perforator conveyed on electric line avoided damaging the in-situ control lines and the casing. To meet...

Tech Paper: Size Degradation Studies of Lost Circulation Materials in a Flow Loop

When drilling problem zones in mature fields, it is important to use resilient lost circulation materials Recently, there has been significant interest in understanding the material properties of lost circulation materials (LCM), including size degradation studies from mechanical compression tests and from shear flow. These types of tests are currently of particular importance because of increased drilling activity in mature fields, which often require LCMs as a...

Tech Paper: Remotely Operated Barrier Valve Provides Interventionless Solution for Offshore Vietnam Completion Campaign

Operator adopts completion installation practice that helps reduce risk and save rig time Considering the scope of work necessary to batch-complete six wells within a tight deadline, the initial outline for an offshore Vietnam completion program required multiple slickline well interventions, not only while on the rig critical path but also during simultaneous operations (SIMOPS). This high frequency of well intervention added considerable time, cost, and potential...

Tech Paper: Offshore Coiled Tubing Interventions Maximized the Value of Watered Out Mature Fields…

Coiled tubing helps sustain production in deep sandstone formations Saqqara is a very challenging field in the Gulf of Suez in the Red Sea area, producing from the deep sandstone Jurassic formation. This formation can sometimes be watered out, with a combination of high H2S and CO2 levels in the production. High sand quality has developed high horizontal and vertical permeability, which challenges any water shutoff...

Tech Paper: Eagle Ford Horizontal Drilling Optimization in Karnes and DeWitt Counties

Optimized drilling methods lead to increased success rate and reductions in rig time The drilling of Eagle Ford horizontal wells in Karnes and DeWitt counties traditionally requires at least two bottomhole assembly (BHA) configurations to drill from surface casing to reach total depth (TD). After a few initial successful attempts at drilling from surface casing to TD using a single BHA (one-run), several problems were encountered,...

Tech Paper: Sourceless Formation Evaluation and Geomechanics While Drilling: A Case History

Optional sourceless porosity tool combination can assist in real-time drilling operations and bypass borehole enlargements A combination of nuclear magnetic-resonance (NMR) and azimuthal acoustic tools has recently become an optional sourceless porosity logging-while-drilling (LWD) tool. This tool combination was used in Kuwait as a part of the bottomhole assembly (BHA) only once before, but this time, we were able to draw a comparison with density-neutron logs...

Tech Paper: Design Procedure for Cementing Intercalated Salt Zones

Tailoring the right cement design to maintain well integrity across salt zones Wells often require being drilled through and cemented across salt formations. In many parts of the world, salt sections consist of multiple salt types. These include Halite, Carnallite and Tachyhydrite. The last two salt types could move one hundred times faster than Halite and are chemically reactive. Typically, Carnallite and Tachyhydrite occur as streaks...

Tech Paper – Behind Pipe Log Evaluation Study: Deepwater Subsea Abandonments in the Gulf of Mexico

Pipe evaluation techniques can help reduce the cost of removing casing strings during plug and abandonment activities New techniques for well abandonment log evaluations have been under study since 2012 in the Gulf of Mexico (GOM). Legacy practices typically used acoustic methods consisting of cement bond log and ultrasonic scanner devices. The new methods described in this paper consist of adding nuclear sensors to supplement the...

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