In the Kenali Asam Field in Sumatra, Indonesia, most producing wells in the “b/400” horizon produced formation sand. Fracturing for sand control in this interval increased total field off-take from 900 bopd to 1900 bopd and controlled sand production.
There are many kinds of methods to improve oil production such as production optimization, implementing of enhanced oil recovery, horizontal drilling, etc. It's depending on the reservoir characteristics. For example, changing pump size with the big one is not always to get a good result particularly in the reservoir that has sand problem. Acidizing treatment is also sometimes successful and failed. In order to get the best solution, a hydraulic fracturing is one of many alternatives to handle sand problem and also could improve the production at the Kenali Asam field.
Kenali Asam field is located approximately 7 Km South of Jambi City, South Sumatra, Indonesia. Since the field was found in 1931, has drilled 260 wells with 19 layers in Air Benakat Formation group.
Hydraulic fracturing has implemented since 4 years ago in this field, particularly in layers d/320, b/400, P/1050, and S/1170. The best result is obtained from sand b/400 (shallow sands). The most problem in these layers one of them were tight (the permeability is less than 20 md) and another layer has a good permeability (more than 200 md), but unfortunately has sand problem.
Using hydraulic fracturing the production could be increased significantly and some of them also could solve the sand problem. For instance, from sand d/400 has been giving the gain around 1.170 barrel per day. And, from economical side this job still attractive due to the total cost of hyfract job (including rig cost) is still less than US $ 100,000 per well. Due to sand b/400 is very potential and attractive, in this paper, the focus discussion about sand b/400 and also will discuss about the kind of suitable proppant for this reservoir.
Author(s): Gunung Sardjono Hadi, PERTAMINA; M. Ainul Arifin, JOB P-Gulf Resources (Jambi) Ltd.
Paper Number: SPE 64393