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首页> 外文会议>Annual Indonesian Petroleum Association convention and exhibition;Indonesian Petroleum Association convention and exhibition;IPA >MANAGING RESERVOIR UNCERTAINTY AT THE NORTH BELUT FIELD, OFFSHORE INDONESIA, NATUNA SEA: AN INTEGRATED ANALYSIS OF BIOSTRATIGRAPHY, CORE, WIRELINE AND SEISMIC DATA
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MANAGING RESERVOIR UNCERTAINTY AT THE NORTH BELUT FIELD, OFFSHORE INDONESIA, NATUNA SEA: AN INTEGRATED ANALYSIS OF BIOSTRATIGRAPHY, CORE, WIRELINE AND SEISMIC DATA

机译：NATUNA海域印度尼西亚北部贝鲁特油田的储层不确定性管理：生物地貌学，岩心，气象线和地震数据的综合分析

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The North Belut field is a major gas development in Block B, South Natuna Sea, Indonesia. The reservoir - Udang and Gabus sands - is a 1500 ft section of thin, stacked lacustrine and deltaic sands. Appraisal wells show significant variation in vertical and lateral reservoir development. Reservoir quantity, quality and connectivity are major uncertainties.To better understand the reservoir a number of focused studies of reservoir biostratigraphy (Morley et al 2007), core sedimentology and petrology, wireline log analysis (log shapes and petrophysics) and seismic stratigraphy were carried out and integrated.Some conclusions:1.Facies correlation to log motif is not always predictable. Biofacies and core sedimentology help facies analysis considerably.2.Deposition occurred within an increasingly distal lacustrine delta setting. Thin distributary channel and associated mouthbar sands dominate. Accommodation space was low. Older reservoirs were deposited in a freshwater lake which became entirely brackish lake by early reservoir time.3.Distributary mouth bar sand bodies are more amalgamated in the older reservoir (Gabus and early Udang) and become increasingly separated vertically and possibly also laterallyup section (later Udang). Net sand to shale ratios are lower in the younger units demonstrating an over all lake transgression. Degree of sand aggregation - hence sand connectivity - will influence the number of development wells required.4.Intra-reservoir mapping at zone scale is possible, but sand body mapping using seismic so far is difficult. A few channel features can be seen in some horizon slices from the deeper reservoir, indicating axial transport of sediment towards the NE. However, seismic information on sand distribution in the upper reservoir is qualitative at this time.5.The relationship of porosity to permeability is, at best, moderate. Reservoir diagenesis is the main cause, both enhancing and reducing permeability without proportionate changes in porosity.
机译：北贝鲁特气田是印度尼西亚南纳图纳海B区块的主要天然气开发项目。 Udang和Gabus砂岩储层是一个1500英尺长的稀薄，堆积的湖相砂岩和三角洲砂岩。评估井在垂直和横向油藏发育中显示出显着变化。油藏的数量，质量和连通性是主要的不确定因素。 为了更好地理解储层，进行了许多集中的储层生物地层学研究（Morley等，2007），岩心沉积学和岩石学，电缆测井分析（测井形状和岩石物理学）和地震地层学。 一些结论： 1.与对数基序的相依关系并非总是可预测的。生物相和岩心沉积学极大地帮助了相分析。 2.沉积发生在越来越远的湖相三角洲内。稀薄的分配通道和相关的口状沙占主导地位。住宿空间不足。较早的水库沉积在一个淡水湖中，到了早期的水库时间，该湖就变成了微咸的湖。 3）在较老的水库（Gabus和Udang早期）中，分布的口状杆砂体更多地合并在一起，并且在垂直方向和在横向方向上也可能越来越分离 上部分（后来的Udang）。在较年轻的单元中，沙与页岩的净比率较低，表明整个海侵。砂的聚集程度-因此砂的连通性-将影响所需的开发井数量。 4，可以在区域范围内进行储层内部测绘，但到目前为止，利用地震进行砂体测绘是困难的。在较深水库的某些水平切片中可以看到一些通道特征，表明沉积物向东北方向轴向输送。但是，此时有关上层储层砂分布的地震信息是定性的。 5.孔隙率与渗透率的关系充其量是中等的。储层成岩作用是主要原因，增加和减少了渗透率，而孔隙度却没有成比例的变化。

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