Proposal VICO Indonesia is an Oil and Gas Company operating the Sanga-Sanga PSC inEast Kalimantan. This PSC comprises of four operating assets: Nilam, Mutiara, Semberah and Badak. The depositional environment consists of fluvial-deltaicsands with oil and gas bearing sandstone formations stacked on top of eachother, there are on average ten to twenty zones per well. Exploiting thesereservoirs to their maximum potential to meet the gas delivery to Bontang LNGplant is the object of the asset teams. Maximizing asset value by increasingproduction with lower investment is very important within the VICOorganization. In order to achieve the above objective at optimal costs, a lot of emphasisis being given to rigless activities. The main activity is to open thesestacked gas bearing sandstone formations by adding perforations either bywireline or by utilizing extreme under balanced perforating techniques. This paper focuses on the utilization of state-of-the-art software, perforation performance module (PPM) in conjunction with extreme under balanced(EUB) perforating technique for maximizing gas production from the deep lowpermeability and low porosity gas bearing reservoirs. This paper presentsvarious cases showing how effectively and economically these deep sandstoneformations can be completed to maximize the return on investment (ROI). The PPMwas utilized to predict the performance from these reservoirs. The actualpost-job results were then used to verify the predictions. This was essentiallyto assist VICO in making the decisions in line with the economic benefits forvarious perforating techniques. Reservoir Description VICO Indonesia's Oil and gas fields are located in the Kutai Basin, EastKalimantan, shown in Figure 1. The sedimentary system starts fromMiocene age until recent. At the end of the Miocene period the ancient deltawas formed. The delta was formed and moved from west to east, uplift createdfolds. Two of the most common sandstone facies recognized in the Miocenesediments are fluvially dominated, distributary channel and tidally dominated, delta front bar deposits. Commercial hydrocarbons can be produced from highlyquartzitic channel sandstone to a maximum depth of burial of 15,000 ft. Ingeneral, distributary channel facies have a relatively higher porosity comparedto a front bar. The sedimentary system is divided into three sequences. The upper and middlesequences identified have good reservoir quality (porosity and permeability)while the lower sequence has poorer reservoir quality. The lower sequence (deepgas sand) exists in all VICO fields and offers a significant volume of gas tobe exploited. From the petrophysical calculation, permeability is less than 5md and porosity is less than 12% while the pressure is slightlyoverpressured.

fax 01-972-952-9435. AbstractOver a significant time-period, during the development of a field; a number of factors will contribute to an increased understanding and appreciation of the identification of pay, it's distribution and potential. As a result, it is not unusual to find that a significant number of opportunities may exist within existing well-stock; but that these opportunities are 'isolated' by limitations of the original completion design. Accessing these reserves then simply becomes a question of completion 'adaptability', optimization and economics. Therefore this paper describes the application of a rig-less 'cement-packer' approach, in order to economically access these reserves, while retaining the necessary level of completion integrity. The paper describes the steps involved in achieving this, from concept, through planning to execution. Finally, a number of case-studies (with variants) are presented to demonstrate the increasing development and applicability of the process.It is likely that an operator would consider that such by-passed opportunities would generally require a costly, lengthy and complex work-over operation; and potentially discard the option due to the economics and risks. However, this paper clearly demonstrates that the cement-packer approach is a simple, efficient and economic method of accessing such bypassed pay, while helping ensure acceptable well-bore integrity is retained.

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractCompletion Design is a key factor, especially in Gas field management, and completion design can have a large affect on gas deliverability and the liquid production through out the lifetime of a well. This paper describes a novel solution to producing gas from multi layered gas intervals, such as encountered in VICO Indonesia's operating area in East Kalimantan. The paper is focused on a completion in the Semberah Field, which utilises a novel combination of both conventional and monobore completion types. Essentially having a selective single string completion dedicated to producing the shallower reserves, whilst following a monobore concept for the second string to deplete deeper reserves.

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