The Dominator® Charge Demonstrated Impressive Increases In Laboratory

Overview 

A major client for Halliburton Wireline and PerforaƟng in the Caspian region observed productivity damage after perforating and completing multiple wells. After careful analysis the damage was likely a result from perforating in an overbalanced pressure condition caused by the use of a high‐weight brine completion fluid, which limited the amount of perforation cleanup. Mud‐filtrate invasion was also estimated to be beyond 6 inches, which later testing showed was not bypassed with the existing perforating system.  

Challenge 

The client contacted and worked closely with Halliburton to develop a specialized perforating system that could maximize downhole penetration specific to their reservoir and wellbore environment. Extensive fluid testing and development work was also conducted to significantly minimize damage from the filtrate. The custom‐designed system increased penetration beyond the anticipated invasion zone, thereby providing a clean perforation tunnel extending into the undamaged reservoir.  

Solution

Halliburton listened and responded to the operator’s requirements to maximize asset value. To gain better subsurface insight, a recommendation was made to deploy the CoreVault^® RFP system, which integrates wireline rock coring with fluid sampling and measurement of pressures and temperature downhole, while preventing fluids from escaping during the acquisition of high-quality rotary sidewall cores. This unique solution provides an analysis of the complete reservoir. It captures and retains reservoir fluids, and delivers pressure-temperature measurements with the rock samples to the surface, enabling volumetric measurement of hydrocarbon properties. Additionally, the CoreVault RFP system yields immediate data at surface prior to full laboratory analysis, providing answers directly at the wellsite. With the CoreVault RFP system, operators are better able to predict production, manage their assets, and understand the economics of their reservoir, particularly in unconventional reservoirs. The data obtained can significantly enhance economic value and reduce exploration/development risk. 

Result

The charge development and testing program was initially outlined according to the client’s scope of work, which required deeper formation penetration than the existing 2 3/4‐in. MillenniumTM charge, which is conveyed in a 3 1/8‐in. OD or smaller gun assembly capable of perforating 5 1/2‐in. heavy‐ wall casing. Initially, seven unique charge designs were identified and built, modifying charge variables such as explosive mass, case and liner geometries, material, and manufacturing techniques. 

Each charge was then detonated into a rock target, its performance evaluated, and the top‐performing charges identified and selected for further testing. The selected charges were then evaluated by detonating into rock targets at downhole conditions and the best performing charge identified. The selected charge demonstrated a 41 percent increase in clean perforation tunnel and 34 percent increase in total core‐ penetration depth at the Halliburton Advanced Perforating Flow Laboratory.