一种基于丙型水驱曲线含水率预测新方法

针对水驱油田在进入特高含水期产液量上升快、常规含水率预测方法精度低的实际,从丙型水驱特征曲线基本原理出发,得出液油比与产液量的二项式关系,结合含水率与产液量之间的关系,推导出基于液油比的含水率预测模型。研究表明:随着累积产液量的增长,含水上升速度减缓;通过油田实际生产动态数据验证与对比,新建立的水驱油田含水率预测模型预测精度较高,有效拓展了丙型水驱曲线的应用范围,解决了特高含水期含水率预测精度低的问题,具有较强的推广应用价值。     

对潭口新区工程方案编制与实践的认识

潭口新区建设方案编制以节能降耗为出发点,机采系统依靠井底流压和目标产量确定工作参数,杆柱组合采用能耗最低设计方法,根据斜井抽油杆侧向力分布状况设计抽油杆扶正器设置间距;注水系统优化地面管网布局,降低了高压注水单耗;集输系统对单井集油管线进行了优化设计,充分利用油井伴生气资源,实现了单管常温集输和单管油气密闭集输,减少了原油损耗,降低了区块的能耗水平。     

Particle swarm algorithm with adaptive constraint handling and integrated surrogate model for the management of petroleum fields

This paper deals with the development of effective techniques to automatically obtain the optimum management of petroleum fields aiming to increase the oil production during a given concession period of exploration. The optimization formulations of such a problem turn out to be highly multimodal, and may involve constraints. In this paper, we develop a robust particle swarm algorithm coupled with a novel adaptive constraint-handling technique to search for the global optimum of these formulations. However, this is a population-based method, which therefore requires a high number of evaluations of an objective function. Since the performance evaluation of a given management scheme requires a computationally expensive high-fidelity simulation, it is not practicable to use it directly to guide the search. In order to overcome this drawback, a Kriging surrogate model is used, which is trained offline via evaluations of a High-Fidelity simulator on a number of sample points. The optimizer then seeks the optimum of the surrogate model.     

低渗透中等偏强水敏油层储层保护技术的研究——以辽河油田强1块为例

强1块本身储层物性差,属于低孔、低一特低渗储层,粘土含量高,水敏表现为中等偏强。对于这种低渗区块进行注水开发时,储层的保护措施尤其关键。针对上述特点,确定各种工作液注入时相关临界值参数,同时开展防膨剂优选和注入水质的研究,采用离心法和X衍射法筛选了12种防膨剂的防膨效果,并进一步优化防膨剂的注入方式和注入浓度。结果表明,6#防膨剂效果好,现场可以先期采用注入质量分数为1％段塞,之后采用防膨剂质量分数为0．5％连续注入;从而实现该块自实施注水以来,注水压力稳定,且达到日配注量的要求,成功实施注水开发。     

Microbial and Waterflooding of Fractured Carbonate Rocks: An Experimental Approach

Fractures and fractured zones require special attention while formulating a reservoir development plan. They may improve or hinder the oil production. Conductive fracture rocks may provide the required permeability to drain an oil saturated low permeability rock matrix. Low sweep efficiency of many oil reservoirs is the result of channelling of injected water through high permeability zones that are normally associated with naturally fractured systems in heterogeneous reservoirs. In this case, a substantial amount of effort needs to be focused on improving the distribution of injected water in the wellbore through different treatments, such as using gelling agents, cements, cross-linked polymer and emulsions. Other alternatives such as microbial and surfactant based methods have been proposed. This paper presents the results of research conducted on thermophilic bacteria that were obtained from UAE local environment. Coreflooding experiments were conducted on fractured single cores to show the effectiveness of microbial treatment. Different fracture angle orientations of 45°, 90°, and 180° relevant to the axis of the flow were investigated. The effect of matrix permeability on the treatment was also studied. A comparison between water flooding and microbial flooding of fractured systems was conducted. A non-invasive imaging technique—Scanning Electron Microscopy (SEM)—was employed to visualize changes on the surface of the fracture as a result of bacteria flow through the system.     

裂缝性油藏水驱油机理与注水开发方法

本根据裂缝性油藏油水运动的基本规律以及两江地区裂缝性油藏的注水开发实践，对裂缝性油藏最佳注水方式的合理选择进行了论证，指出了五点或直线排状井网是开发这类油藏的最佳选择，并用油田实际开发资料进行了验证。     

喇,萨,杏油田生产气油比变化规律

利用不同含水阶段石油，天然气化学组分监测资料，高压密闭取心资料，单井单层生产气油比资料以及水驱开采条件下生产气油比的数值模拟，从理论到实践对喇，萨，杏油田生产气油比的变化规律进行了系统的研究与总结。     

注水开发油田二次孔道最佳封堵时机和最佳封堵位置的室内实验研究

采用平板模型的流动实验方法,研究了二次孔道封堵的最佳时机和最佳位置,从最佳堵时机研究得到油井刚见不时是最佳的封堵时机,水道一形成即进行封堵,可减少注入水的无效循环,也可以减少二次孔道的形成,从最佳封堵位置研究得到在靠近注水井的位置是最佳的封堵位置,说明了封堵越靠近注水井,对海线影响越大,波及系数越大,因此原油采收率越高。     

巨厚层砂砾岩底水油藏注水开发研究

雷64块为块状砂砾岩底水油藏,油层巨厚,最厚可达200 m,储量丰度大.在油藏天然能量、储层特征分析和应用解析公式、数模方法对注水开发采收率变化、采液和采油指数变化趋势、注水方式、注采井网、见水时间研究的基础上,认为雷64块应该采用两套层系、人工注水开发.下层系以注底水层为主,在局部底水与油层之间隔层较发育的部位,进行层内注水.与潜山油藏不同,块状砂砾岩油藏仍具有层状特性,实际工作中需要认真分析隔层因素,在实施两套层系、正方形井网210 m井距的情况下,注采井距成为影响注水开发效果的主要因素.采用分采合注,将因部分注采井距达到150 m而大大加速水淹水窜,影响开发效果.