Integrated Completion Technology of Water and Sand Control in Reservoirs with Extra-High Porosity and Permeability in Bohai Oilfield
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摘要:
渤海BN油田的特高孔渗疏松砂岩油藏储层非均质性强，生产井出水、出砂问题严重，而现有各自独立设计实施的控水和防砂工艺存在设计实施繁琐、控水防砂效果差等问题。为此，在连续封隔体控水完井技术的基础上，根据地质工程一体化的思路，给出了优选连续封隔体颗粒粒径、设计ICD筛管控流强度及优化配置ICD筛管的方法，形成了适用于渤海特高孔渗储层的防砂控水一体化完井技术。BN油田3口井进行了控水防砂一体化完井技术试验，与邻井相比，单井无水采油期平均延长187 d，初期含水率远低于预期含水率，井口无砂时间明显增长，其中BN-D4H1井井口无砂时间长达889 d。现场试验结果表明，防砂控水一体化完井技术可以满足BN油田控水、防砂的双重需求。
Abstract:The reservoir of Bohai BN Oilfield, dominated by unconsolidated sandstone with ultra-high porosity and permeability, exhibits strong heterogeneity and has serious water and sand production from producing wells. The existing water and sand control measures designed and implemented independently have problems such as cumbersome design and implementation, and poor effect of water and sand control. Therefore, based on the completion technology of continuous packer water control and the idea of geological engineering integration, the methods of optimizing the particle size of the continuous packer, designing the flow control strength of inflow control devices (ICDs), and optimizing the configuration of ICDs were proposed, and the integrated completion technology of water and sand control suitable for the Bohai reservoir with ultra-high porosity and permeability was developed. The integrated completion technology of water and sand control was tested in three wells in BN Oilfield. Compared with the adjacent well, the water-free oil production period of a single well was extended by 187 days on average, the initial water cut was much lower than expected. The wellhead sand-free time was significantly increased, among which the wellhead sand-free time of Well BN-D4H1 was 889 days. Field test results demonstrate that the integrated completion technology of sand and water control can meet the need for water and sand control in BN Oilfield.
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图 1 连续封隔体一体化完井管柱结构示意
Figure 1. Pipe string structure of integrated completion with continuous packer
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图 2 未控水井和ICD+连续封隔体控水井的产液剖面示意
Figure 2. Fluid production profile of uncontrolled wells and wells with ICD + continuous packer
表 1 BN油田连续封隔体控水防砂井实际生产与设计对比
Table 1 Comparison of actual production and design of wells with continuous packer application in BN Oilfield
井号 配产量/
（m3·d−1）初期实际产油量/
（m3·d−1）预期初期
含水率，%实际初期
含水率，%BN-A29H1 50 160 50 4 BN-A36H1 35 175 81 2 BN-D4H1 40 140 75 9 
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