国内已建的地下储气库(以下简称储气库)大部分是由水淹气藏改建而成,为了进一步提高水淹气藏型储气库库存动用程度,进而实现储气库达容达产高效运行,以板中北储气库为例,深度剖析注采气运行各项指标及周期扩容达产能力,分析了影响库存动用的因素,提出了提高库存动用关键技术和措施,优化了储气库运行的关键参数.研究结果表明:①水侵气藏流体分布复杂、注采速度、气井产水、压力差异、井网井距是影响储气库库存动用程度的主要因素;②建立了不同区带单井合理配注方法,实现储气库均衡驱替,提高储气库波及效率;③建立了含水气井产能修正数学模型,指导了含水气井的合理配产,延长了生产时间,提高了水淹区库存的利用率;④论证了合理井网井距,优化了注采结构和地面压缩机配置,地下地面整体联动,实现了储气库差异化、精细化注采气,提高了气驱扩容效率.结论认为,板中北水淹气藏型储气库库存动用关键技术的研究与应用,将储气库库存动用程度提高了近 10%,有效指导了水淹气藏型储气库的高效运行,对同类储气库库存分析与动用提供了借鉴和参考.

2000年投产的大港油田大张坨储气库是中国第一座商业运行的储气库.20年来,大港油田储气库业务从无到有、从小到大、从大到优,经营理念不断调整,在技术、业务、政策、改革、市场5种力量交织驱动中逐步发展,其中市场是最大的驱动力量.大港油田储气库的建设历程表明,油气田是当前我国储气库建设的主要力量,但是市场机制不健全等问题制约了我国储气库业务的进一步发展.建议国家加快完善储气库市场机制,显性化油气藏储层的市场价值,加强储气库专业人才队伍建设.

不整合遮挡油气藏是一种特殊的油气藏类型,其成藏过程受断层、不整合面及不整合面上下地层对接岩性等多因素影响,与构造油气藏相比,其在油气藏解释描述方法和成藏规律方面的研究认识还有待深入.通过对不整合遮挡油气藏正演模拟不整合面上下不同岩性对接地震响应特征,应用地震反演识别剥蚀不整合带,并通过已知井对比标定,地震同相轴追踪解释,刻画不同砂体条带分布特征,进而根据油气藏成因,将该类油气藏分为"贴面成藏"和"内幕成藏"两种类型,并对应提出"二元"和"三元"成藏条件.该研究成果对不整合遮挡油气藏的精细刻画、油气成藏规律研究及油气藏勘探开发部署具有指导意义.

In this paper, the flow field distribution of reservoir was calculated by commercial numerical simulation software, and the concept of streamline cluster was proposed. By extracting the spatial coordinates and attribute parameters of streamline particles, the vector flow field characterization parameters of streamline cluster potential, streamline cluster flow rate and oil content of streamline cluster are formed respectively. The Lorentz curve is introduced to evaluate the seepage velocity of the grid and to form a characterization method of reservoir flow heterogeneity. Based on the idea of balanced seepage field, the reconstruction methods of "building flow field", "planting flow field", "compensating flow field", "transferring flow field", "steadying flow field" and "controlling flow field" are established for different seepage field characteristic regions, and it is proved by an example. The results show that the property of streamline cluster between injection and production wells can effectively measure the horizontal and vertical development potential and displacement intensity of the reservoir, and the flow heterogeneity coefficient represents the fluid distribution difference in different development stages of the reservoir. The vector flow field characterization method is applied to a block in GD oilfield and its development status is evaluated. The vector reconstruction method established in this study is adopted to adjust the characteristics of different flow field regions. After the implementation of the adjustment scheme, the injection-production correspondence rate increased from 78.6% to 92.4%, the water drive control degree increased from 69.2% to 89.7%, and the EOR increased by 5.16%. The effect was obviously improved.

随着港西油田油气储量采出程度的增高,三次采油技术已逐渐推广应用.在三次开发方案研究中,储集层的微观孔隙结构、渗流规律以及驱油效率实验至关重要.应用高精度CT扫描仪录取岩心资料,结合软件CTan、CTvox以及CTvol分析,通过岩心微观剩余油的识别、计算及三维建模,有效地对岩心不同驱替方式下微观剩余油赋存状态进行了定性及定量描述,分别得到了岩心切片含油率变化对比、岩心驱替方向上微观剩余油变化表征以及三维微观剩余油形态变化表征,为合理高效的开发方案制定提供客观理论依据,对三次采油方案的合理实施及渗流场的调整具有现实指导意义.

为了研究地震拓频技术在黄骅坳陷周清庄油田及周边地区的适应性,提高砂岩储集层识别精度,应用HFE拓频处理技术对B 48X1井区滨Ⅳ油组及F 35-22井区的板3油组开展研究.HFE方法基于把低频子波压缩a倍而得高频子波,通过试验选择一个合适的a值,在提高地震数据分辨率的同时,保持原有信噪比、相对振幅关系及时频特性,然后在高分辨率地震数据的基础上进行波阻抗反演,对储集层进行追踪和预测.不同井区研究结果表明:受到原数据品质的限制,选择a=1.8能够有效提高地层分辨率,a值过高则信噪比开始降低;在B 48X1井区取得了良好效果并通过验证,拓宽频带25 Hz,平面预测结果与测井解释基本一致,吻合率80％,根据储集层预测成果选取有利评价区4.5 km2.