Publications

Fracturing in Talisa formation (thin layer, shallow, and less shaliness contrast) has met several challenges. Using conventional fracturing technique (to achieve a large conductivity, placing a large volume of proppant, high rate and high pressure), it has a risk of unexpected growing in height, breaking the upper and lower barriers, early screen out, sand flowback and end up with ineffective treatment. The more gentle fracturing treatment is introduced to this formation by using lower rate of injection, lower pressure, less aggressive proppant concentration, less damaging fluid and multiple cycle of injection stage. On conventional fracturing treatment , a large fracture geometry is usually expected at the end of treatment. Instead of creating a large fracture half length, this fracturing approach will create multiple fracture with different orientation which connect each other and lead an effective stimulation. The low injection rate during the treatment will also lead a shear dilatation mechanism on reservoir which will enhance the permeability. On this fracturing treatment, observation of the formation response is conducted at the beginning of the stage, during treatment, during decline in every stage and at the end of the stage to see how the injection in every stage can improve the formation. The objectives of this paper is to share the case study of technique implementation on Langgak Field, Rokkan Hulu Riau. This Field is operated by SPR Langgak and the fracturing treatment is provided by NESR. 3 wells are treated and showing good indication of fracturing result. This paper will give different perspective to the audience for a non-conventional fracturing practice, especially for Talisa formation, which could be also applied in other field which has similar characteristics.