针对目前油田使用的 2 种不同叶轮和导轮结构的电潜离心泵,采用计算流体动力学方法进行泵内流场模拟.在流量为 80～200 m3/d,介质运动黏度为 1～40 mm2/s的工况下研究泵的外特性差异.基于FLUENT商业软件,采用标准k-ε湍流模型建立数值仿真模型,分析 2 种泵的叶轮在不同工况下的流场分布规律,根据速度矢量分布探究静压分布出现的原因.绘制泵的特性曲线,包括扬程、效率与流量的关系,发现泵特性出现变化的工况点与流场分析结果相对应.根据流场模拟结果分析 2 种泵所适用的工况,结果表明:径向流泵适用于大流量和高黏度工况,混向流泵适用于较低流量和中低黏度工况.研究成果可为不同工况下泵的选择及泵的结构优化提供理论依据.

机械筛管是疏松砂岩油藏的聚合物驱注聚井主要防砂形式,筛管的选型和参数优化不但要考虑对地层砂的防砂效果,还需要考虑注聚期间筛管对聚合物溶液黏度保留率.通过筛管内注聚合物实验、挡砂堵塞实验以及堵塞后注聚合物实验,分析不同缝型缝宽绕丝筛管的堵塞规律及挡砂情况,结合过筛管聚合物黏度保留率进行综合性能对比.结果表明:干净筛管对聚合物黏度损害较低,而筛管堵塞后对聚合物黏度损害大大增强,重新注聚时的自解堵能力对聚合物黏度起决定性影响.缝型结构对挡砂堵塞影响明显,是否有利于形成砂粒桥架沉积决定了筛管堵塞程度.对于目标油区中值粒径130μm地层砂,180μm精度倒梯形缝筛管表现出最优综合性能.该研究考虑筛管对聚合物剪切降粘特点和挡砂堵塞,提供了一种综合对比评价方法,可为注聚井绕丝筛管防砂条件下的缝型缝宽优选提供参考和借鉴.

A high- precision long-term online downhole temperature and pressure monitoring system based on optical fiber Bragg grating (FBG) and extrinsic Fabry-Perot interferometer (EFPI) is developed in this paper. The system monitored the pressure through the change in the EFPI cavity length and the temperature through the change in the FBG wavelength, and simultaneously realized the temperature compensation of the pressure. Calibration results showed that the system has the pressure measurement range of 0. 1. 42 MPa, the pressure sensitivity of 203. 8 nm/MPa, the precision of perpendicular to 0. 05% F. S (F. S means full scale), and pressure resolution of 0. 0007 MPa. The system is demonstrated in a production well in Zhuangxi, Shengli Oilfield, and the downhole temperature and pressure are recorded in real time for 5 months. The results show that the system can reflect the production status of oil wells and realize the online monitoring of important parameters, which has important guiding significance for improving oil and gas recovery.

胜利海上油田主力层系馆陶组层多、跨度大、易出砂,目前采用笼统充填防砂方式,且防砂通径小,无法满足7 in生产套管分层采油要求;此外,生产测试采用毛细管测压技术,只能监测一个参数,制约了电泵井生产参数实时动态监测及优化.针对上述问题,开展了海上7 in套管分层防砂分层采油技术研究,鱼腔内径达到88 mm以上,配产器直径可设计到80 mm,泵下测试装置能满足温度、压力、振动等多参数测试要求,并在胜利油田陆上和海上开展了现场应用.现场试验结果表明,该技术实现了精细化控制分层采油与测试,实现增油4.25×104 t,有效提高了油井产能,在多层非均质疏松砂岩油藏具有广阔的应用前景.

A carbon-coated and bellow-packaged optical fiber sensor for high pressure and high temperature monitoring in downhole applications is developed and successfully field-applied in an oil well. Carbon-coating and bellow-packing techniques are introduced to enable the sensor to operate under the extreme conditions in downhole. Carbon-coating is aimed at preventing oil and gas from penetrating through the silica capillary that houses the sensor and also reduce the hydrogen-induced loss and capillary corrosion. The packaging with a bellows structure is designed for both efficient pressure transfer and effective isolation of external corrosive contents from direct contact with the optical fiber probe. We developed a carbon coating technique based on a CO2 laser system and implemented a bellows - diaphragm combination using laser welding. By both measurements in lab and a long-term field test in an oil well, the coated and bellow-packed sensor has shown good pressure linearity of more than 0.99999 with 0.03% F.S. repeatability and 2.9 psi resolution - demonstrating its great potential for long-term downhole dynamic monitoring.

非均相复合驱油技术是一种新型驱油技术,该驱油体系利用黏弹性颗粒驱油荆B-PPG的驱替性能,与聚合物复配之后扩大波及能力,叠加表面活性剂超低界面张力带来的洗油能力,从而获得最佳的驱油效果.本文针对胜利海上油田非均相复合驱,开展了Ⅰ型、Ⅱ型、Ⅲ型三种型号B-PPG非均相复合体系通过低剪切滤砂管性能的实验.结果 表明,Ⅰ型B-PPG非均相复合体系在通过滤砂管时,未发生堵塞,黏度保留率和粒度保留率良好;Ⅱ型B-PPG非均相复合体系通过滤砂管时,在高排量条件下黏度有一定的损失;Ⅲ型B-PPG非均相复合体系在高排量条件下存在较大的堵塞风险,且黏度损失较大.

埕岛油田主力层系馆上段目前综合含水已达83.7％,采油速度1.6％左右,呈现出产量下降、含水上升、开发成本逐年增长趋势,水驱开发稳产难度逐渐增大,急需转换开发方式以提高采油速度和采收率,因此对海上化学驱进行了整体规划部署,并选取了CB22F平台作为先导试验区.简述了CB22F区块概况,对主导工艺现状进行了分析,从注入井防砂、分层注聚、油井防砂和举升工艺四个方面对化学驱关键注采技术进行了优化研究,并针对注入工艺开展了陆地现场试验,试验结果表明,分层防砂和同心分层注聚双管分注工艺能够满足低剪切注入的要求.

新型潜油泵电缆作为潜油泵系统的关键构件,其温度和载流量是确保电力利用率和安全可靠性的重要参数.基于电缆热路模型和有限元的基本原理,建立新型电缆温度场研究的数学模型.根据实际电缆结构和工况构建分析模型,研究了电缆内部温度场分布规律,获得了不同地表温度、不同下入深度等因素对电缆温度场的影响规律.最后对比分析理论研究和有限元数值计算两种方法所得电缆载流量,结果表明两者最大误差仅为4.9％,说明IEC 60287方法和数值计算均可适用于该电缆的温度场与载流量计算,IEC 60287方法简便、计算结果偏小,数值计算模型简化条件少,计算更接近实际.

A new type of high-strength resin/fiber composite cables with hollow multilayered structure was proposed.The theoretical model of the high-strength cable was established based on the micro mechanics of composite materials and its applicability was further verified by a horizontal tensile test.Finally,the stress strain behavior of the cable was analyzed by using the theory and numerical methods.The results indicated that the effect of different boundary conditions on the analysis results was insignificant under a relative error of about 3.12 ％.The axial elongation,radial contraction and axial torsion angle were greatly influenced by suspension mass,whereas the internal pressure exhibited few effects on the axial extension rate and axial twist angle.On the other hand,the relative growth rate of the radial deformation increased by 12.32 ％ with an each additional increase of 5 MPa in internal pressure.The use of small angle winding scheme can improve the tensile stiffness of the cable,but there was a stress fluctuation appearing between the layers of the cable,which leads to an internal instability.The high-strength cable can meet the requirements of production under the normal conditions with a suspension quality of 10 t and an internal pressure of 15 MPa.

简述了连续油管作业注入器链条传动机构的运动受力情况,强度校核设计,最后对关键部件进行了有限元设计,为连续管注入器优化设计提供了理论基础。

The clamping principle of injector head for coiled tubing(CT) was analyzed in this paper.The clamping force is simplified as the circumferential sine distribution.The stress function in series form,the stress boundary condition and displacement continuous condition are used to obtain the stress distribution under the effect of irregular external pressure.The paper gives the laws on the change of equivalent stress with clamping force,axial tension,internal pressure,CT's wall thickness and external diameter.The first law is that the clamping force increases quickly with equivalent force.The second law is that the equivalent stress increases with the axial tension F,excluding the very small axial tension.The third law is that the internal pressure has different tendency effects on equivalent stress in different places of CT.In other words the equivalent stress decreases with the increase of internal pressure at the point of θ=0 of internal surface and the point of θ=π/2 of external surface.The equivalent stress increases with internal pressure at the point of θ=π/2 of internal surface and the point of θ=0 of external surface.The fourth law is that the equivalent stress of the internal and external surfaces of CT decreases slightly with the increase of wall thickness.The fifth law is that when wall thickness and clamping force are certain,the equivalent stress tends to decrease first and then increase with the increase of outer diameter.The sixth law is that when the internal pressure gradually increases,the yielding limit changes from out-shift to ingression and the range of the elastic zone gradually decreases with the increase of internal pressure.

针对目前胜利油田探井试油在录取含水、流量、温度、压力等试油数据时测量精度低、容易存在人为误差和测试数据不连续等问题,研制开发了IMM-I型单井井口多参数智能计量装置.这种装置主要由测试模块、数据采集模块和气体分离模块3部分组成.实现了测试自动化操作和油井采出液连续不分离自动计量,并且整个装置为橇装式,便于移动安装,能满足探井试油、稠油、低边远井的精确计量和测试需要.测取资料准确、可靠.