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- W2982564950 abstract "Abstract Increasing natural gas demand in Indonesia has driven many operators to develop potential gas field assets, whether offshore or onshore, across Indonesia. One such field is BC which is located offshore East Java in a tectonically active area and part of the ABC complex. The field is composed of carbonate rock which is globigerinid in nature, with the presence of different facies such as packstone, wackstone and grainstone, of which the latter has the best permeability. An extensive geomechanical study was conducted and one of the conclusions was that solids and fines production to some degree are likely to happen from the carbonates in this field. To minimize the risk of solids production, an openhole gravel pack (OHGP) system was designed and deployed. Horizontal OHGP involving screens equipped with shunt tubes for alternate packing are commonly deployed in unconsolidated sandstone formations around the world. The use of filter cake breakers, during or after OHGP placement, is regularly included as part of these treatments. The BC is a carbonate field, besides the low frac gradient and the naturally fissured characteristics associated to the rock which makes it prone to high leak-off, the completion strategy required a special designed filter cake breaker inert to the formation and capable of helping to minimize the lift-off pressure; the challenge required a different approach. The successful completion of these wells required the use of state-of-the art gravel pack placement simulator, special analysis of Bottom Hole data during gravel pack placement and customized gravel pack fluid, capable of transporting proppant and clean the filter cake afterwards. One deviated and three horizontal wells with 9 5/8-inch casing and average of 8.6-inch openhole diameter were drilled and successfully completed. Gravel pack placement interpretation using bottomhole gauge data indicates full annular packing for all OHGP cases. After completion, wells were started smoothly with no solids production observed. This paper highlights key technical challenges and risks encountered during the preparation, design, execution, and evaluation stages of this operation and discusses how these challenges were overcome and the risks mitigated. Finally, the lessons learned and their implementation towards the improvement and optimization of future operations are discussed." @default.
- W2982564950 created "2019-11-08" @default.
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- W2982564950 date "2020-10-25" @default.
- W2982564950 modified "2023-10-14" @default.
- W2982564950 title "Alternate Path Horizontal Openhole Gravel-Pack Completion in Soft-Weak Carbonate Gas Reservoir: Offshore East Java" @default.
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- W2982564950 doi "https://doi.org/10.2118/196273-ms" @default.
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