In the present paper, development of SISTRAT/SICOP, an Intelligent System to support petroleum production field and reservoir management, is described. Initially, a survey with specialists in water production problem is performed and, reservoir and field management knowledge was acquired from the Company engineers. This knowledge was described and structured according to artificial intelligence techniques and it was implemented in a computer program with use of fuzzy logic concepts. This System evaluates main production parameters, or symptoms presented by oil production well or the field as a whole, making diagnosis of field production problems. Particularly, the System identifies and shows explanations for reservoir with early water production problems, recommending possible actions for mitigating those problems, in order to help field management.
Fundamentals applied for development of the Intelligent System is presented. The System bases its analysis on field production and reservoir data, well condition reports and expert reasoning knowledge.
Validation tests were carried out with use of field data. Use of an easy and friendly user interface of the System to field operation is shown. Particularly, the System is very suitable for marginal and mature field management, optimizing and reducing water field production and operational costs.
Excessive water production associated with oil production from reservoirs is an operational problem as well as an economical one. We consider that environmental legislation is becoming more and more rigorous. On other hand, water injection is frequently used to increase oil recovery.
Particularly, in mature fields, water is continuously injected into the reservoir although oil production is very small even when oil saturation is still very high. Perhaps, most of non recovered oil is simply by-passed by injected water through existing channels and layers with high permeability reaching producing wells without displacing the oil.
There are many techniques1,2,3 to reduce problems with water breakthrough into a well during a field production. The most common is to inject polymers into a well in order to treat wellbore neighborhood, sometimes mechanical devices are also applied in order to decrease the water production. Nevertheless, thorough understanding of the reservoir condition and producing well environment is needed to properly apply any correction procedure.
The Intelligent The Intelligent System4,5 comprises two modules. The SISTRAT module makes the problem System diagnosis of a field production, analyzing each producing well and reservoir. Generated diagnose by the SISTRAT
