In some Iranian oil fields hydrocarbon recovery is mainly from sandstone reservoirs and sand production is a major problem in these fields. Main reason of sand production in these reservoirs is due to unconsolidated sandstone layers. The common method to decrease this problem is achieved by installing mechanical sand control systems. Previously, some techniques of sand control have been used in Iranian oil fields, such as gravel packing, slotted liner and chemical consolidation by resin. The results which have been obtained through these methods are not remarkably good enough in some cases. Expandable sand screen (ESS) is a new technique in sand control that can result in lower skin and consequently improves reservoir inflow performance. Field tests in various conditions have shown very satisfactory results in both open and cased hole applications. This paper will provide a brief overview of ESS and its advantages and will explains some of the concerns deal with ESS well completion. It provides details of well production results before and after installation of ESS. It also suggests that the use of ESS as an alternative to conventional sand control methods in Iran oil fields is preferable specially in cased hole completed wells.

From decades ago till now, most oil wells in Iran produce using their natural flow potential and they don't need to be fractured. This is why few cases of hydraulic fracturing are recorded in the history of Iranian oil industry. This paper reviews the three cases of acid fracturing previously conducted in an Iranian oil field based on the available data. In addition, a mere propped fracturing was also designed to be carried out but due to some problems the whole operation was cancelled. As time goes by, the reservoir pressure depletes and the need for hydraulic fracturing as stimulation practice arises. Studying the previous fracturing jobs is beneficial when designing a new treatment, thus lessons can be learnt from them.The status of the candidate selection of these wells is discussed firstly in this paper. It is important to choose appropriate wells for such an expensive stimulation practice as hydraulic fracturing. Through modeling the wells the effects of fracturing on the production performance, i.e. production rate, of these wells are considered. A successful hydraulic fracturing should improve the productivity of the well. The available build-up tests are also investigated to diagnose any induced fracture in the formation. Fracturing the formation changes the flow regime around the wellbore and this change can be distinguished through analyzing pressure transient testing data.