【作者】 韩蕾；

【导师】 王杰祥；

【作者基本信息】 中国石油大学（华东） ， 油气田开发工程， 2013， 硕士

【摘要】 断块油藏在我国许多油田十分常见，该油藏类型具有断层发育的构造特征，以及砂体横向展布不稳定且范围比较小、油层不集中的储层特征。当油田进入开发中后期后，含水率较高会导致横向和纵向上剩余油分布很不集中，此时氮气泡沫深部调驱技术不仅能够对吸水剖面进行微调，还能增强油气驱替的效率，对含水较高的油藏的剩余油开采具有十分积极而重要的意义。氮气泡沫具有“堵大不堵小、堵水不堵油”的特性，并且兼具活性水驱和气驱的作用，能够有效调整吸水剖面，改变油藏深部驱替液流方向，提高波及体积和洗油效率，是一种很好的深部调驱剂。临盘油田的临106-1单元就属于这类的断块油藏，根据临106-1单元的地质数据以及生产数据，结合地质建模软件，建立了三维地质模型，并对储量进行了拟合，拟合的相对误差为2.4%；再对单元内的单井进行拟合，产油量、产液量的误差均在10%以内，可以很好的反映临106-1单元的地质特征，为后续的氮气泡沫参数优化的研究打下了基础。在利用多因素综合评判的方法优选出3口调驱井，利用油藏数值模拟技术以及正交设计的数学思想对注入调驱井的氮气泡沫的注入速度、注入量、气液比和泡沫剂的浓度进行优化，在此基础上再进行注入方式、交替周期的优化。根据参数优化的结果，对开发效果进行整体预测。将预测的结论与水驱对比，发现氮气泡沫深部调驱技术的采收程度相对水驱提高了2.671%，效果显著。更多还原

【Abstract】 A large number of fault-blocks exist in our country. In generally, this kind of reservoirhas characteristic of fault-developed, structure fractured, poor stability of sand body in lateraldistribution and taking up smaller range and oil layers scattered.In case of the oil fields gointo high-water cut stage and the oil distributed in layers or between layers is extremelyfragmented, in-depth profile control is not only able to adjust water injection profile andenhance oil displacement efficiency but also one effective way to get the remaining oil ofthe main sand with high water cut. The nitrogen foam could block large fracture andwater,also both be active water drive and gas drive, which could adjust the water absorptionprofile and change the direction of flow in the reservoir and enhance the swept volume and oildisplacement efficiency.So we can say that nitrogen foam is a good deep profile controlagent.Lin106-1Block in LinPan oilfield belongs to that kind of the fault-block reservoir.Based on the geology and production data, reservoir3D geological model is built with thehelp of reservoir simulation software. And geological reserve matching error is about2.4%.The cumulative oil and the cumulative liquid matching error of the single well is less than10%. This model can reflect reservoir geological characteristics of Lin106-1fault-block,which laid the foundation for subsequent nitrogen foam parameters optimization research.On the basis of chosen3profile control wells, with the use of numerical simulationtechnology and orthogonal design, we can opitimize the injection speed, injection amount andgas-liquid ratio,injection method and the alternating cycle of nitrogen foam. According to theresults of optimization parameters, we could predict the overall effects. Then compare thenitrogen foam in deep control profile with water flooding, we notice that the nitrogen foamin-depth profile control technology could enhance the oil recovery by about2.671%.更多还原