Abstract
A successful evaluation and development program in a tight gas-bearing formation requires considerable analysis, not to mention optimization to help ensure a profitable income. In time where problems arise and impact the performance of the well during completion, the risks of well intervention increase significantly. These problems sometimes are not allowing a hydraulic fracturing treatment to be performed. In a situation where hydraulic fracturing treatment is not feasible, an optimized stimulation design is needed to guarantee commercial gas production from the well within current completion constraints and allocated budget.
In the attempt to find an economical yet effective stimulation solution, the hydrajet fracturing process was chosen to be implemented. This stimulation technique has a proven success rate in onshore applications. To increase the treatment efficiency, a novel acid-soluble abrasive material was used to connect the reservoir to the wellbore, which helped avoid sand cleanout time and use of additional chemicals. It was followed by a pinpoint acid stimulation to unlock the hydrocarbons in a low-pressure area of the reservoir.
The post-treatment result showed a very promising result with the gas rate achieved, which was approximately double the rate expected by a conventional bullhead acid fracturing treatment. This has demonstrated the value that the technique brought to the industry.
This paper discusses not only the result of the technique compared to wells that are completed and evaluated with different completion schemes, but also presents a best practice for the method used to stimulate a well. The success of this operation resulted in providing an alternative to completing their requirements relatively faster and more cost-effectively.
