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Reservoir Management Through Horizontal Well Technology in Algyo Field

机译：Algyo油田通过水平井技术进行储层管理

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The first horizontal well was drilled in Hungary in 1989 andrnthereafter 60 horizontal sections were completed. The 76% ofrnthese wells are in the Algyo field, which is the largest HCrnaccumulation in the Pannonian basin. After a 25-yearrnproduction, the inaccessible hydrocarbons, which arerndeposited in unreachable parts of the reservoirs, have becomernproducible by using horizontal wells. The target of thernreservoir management was to maximise the long-term profit ofrnthe field by acceleration of reserves, reduction of gas andrnwater coning, and by effective use of depleted gas reservoirsrnand existing vertical wells. In this paper we have summarisedrnthe reservoir management approach to enhance the value ofrnthe field.rnIn a complex turbidite sandstone reservoir the oil productionrncapacity is doubled by infill drilling of horizontal wells. Thisrnhas added 5.0 Million bbl of incremental reserves. In arnmultilayered part of reservoir Algyo-2 W-2, approximately 1.2rnMillion barrel of by-passed reserves have became produciblernafter 25 year water injection.rnBy reducing gas and water coning in the reservoirs Csongrad-rnDel-1and 2, the oil production rates and the efficiency of wellrnutilisation have been increased.rnThe depleted Maros-1 sandstone reservoir is now used forrnunderground gas storage and existing gas wells were reenteredrnand completed to achieve higher daily peak rates.rnA gas cap exists in the most part of the oil reservoirs.rnDevelopment of the gas production well pattern started in thernearly 90’s. By decreasing the number of wells, improving therndaily gas production capacity, and speeding up thernexploitation of gas cap reserves, the NPV value wasrnmaximised.rnIn all cases, to reduce costs, existing vertical wells were reenteredrnand so the over all value of the assets was improved.
机译：1989年在匈牙利钻了第一口水平井，此后完成了60口水平段。这些井中的76％位于Algyo油田，这是Pannonian盆地中最大的HCrn储量。经过25年的开采，沉积在储层不可及部分的不可开采的碳氢化合物已经可以通过使用水平井来生产。储层管理的目标是通过加速储量，减少天然气和水锥进，有效利用枯竭的储气层和现有的垂直井来最大化油田的长期利润。本文总结了提高油藏价值的油藏管理方法。在复杂的浊积砂岩油藏中，通过水平井的填充钻探，可使产油量增加一倍。这增加了500万桶的增量储量。在注水25年后，Algyo-2 W-2油藏的多层多层部分已可生产约120百万桶的旁路储油。rn通过减少Csongrad-rnDel-1和2油藏中的天然气和水锥进，石油的生产率和枯竭的Maros-1砂岩油藏现已用于地下天然气储藏，并重新进入并完工了天然气井以实现更高的日峰值速率.rn大多数油藏都存在气顶。天然气生产井模式始于90年代初期。通过减少油井数量，提高每日天然气生产能力并加快天然气上限储备的开采，NPV值被最大化。在所有情况下，为了降低成本，重新投入了现有的垂直井，从而提高了资产的总价值。

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