华北油田部分油藏注水井注水压力高、出砂严重,导致注水井频繁出现砂埋、套变,严重制约了油田注水开发。为解决常规和带压冲砂作业风险高、效果差、周期长的难题,提出了在带压注水井中利用连续油管实施冲砂洗井;通过在京11、岔河集等油田58口井现场作业表明,该工艺冲砂工序简单,施工周期短;对长期砂埋停注待大修井的恢复作用较好,可减少作业队伍占用。该技术为砂埋停注待大修的注水井重新恢复正常注水提供了一种新途径,具有极为重要的推广价值。

The injectors in part of Huabei oilifeld reservoirs have high injection pressure, and severe sanding problem, leading to frequent sand burying and casing deformation, which affects severely water injection development of the ifeld. To ifx the dififculties of high risk, poor effect, and long cycle about conventional and pressure sand washing operations, it was proposed to take use of coiled tub-ing to conduct the sand washing work. The applications on 58 wells in Jing 11 and Chaheji ifelds showed that the technology had simple procedure and short operation cycle. It had good recovery effect for long-term sand buried injectors and could decrease man power occu-pation. The technology supplies a novel method of recovering water injection for sand buried injectors, and it has great promotion value.

为了有效应用声学技术在油田注水井声波测井、远程通信、故障监测等方面开展研究工作,在江汉油田实地进行了注水井噪声环境的构建和计算机仿真。首先分析了油田注水井的结构,在掌握结构构建的基础上研究了注水井的噪声环境建模,仿真实验于江汉油田某油井的三个油层选点实地进行,得到了注水井噪声环境波形构成,并做了结果分析。研究成果为在下一步开展油田注水井及管道的水下声通信研究工作奠定基础。

For the further research of the oil field water injection wall domain such as acoustic wave well test, long-dis-tance communication, fault detection with the acoustic technology. The water injection surrounding noise modeling was structured and simulated in the Jianhan oil field. The structure of water injection well was analyzed firstly. the noise source of the well was studied and structured based on the before study. The simulation experiment was carried out on 3 different plots from different oil rocks in Jianghan oil field, the noise environment modeling was got finally and the result was analyzed also. The research result make the fundament for the next further research of underwater acoustic communi-cation the injection well.

针对目前对高凝油油藏注水开发的冷伤害还认识不清的现状,建立了高凝油油藏孔隙中各相组成的物理模型,引入了高凝油析蜡控制方程,结合油水两相渗流数学模型和油藏温度场数学模型,构成了描述高凝油油藏注冷水开发过程中的多场耦合数学模型,并进行了数值求解。结果表明,注水30h,距离注水井50m油层内各处的注水后渗透率和原始渗透率的比值都接近0.85;从开始注水到注水30h,注水井井壁处的注水后渗透率和原始渗透率的比值都恒为0.87;注水5h到注水30h,冷伤害范围从距注水井15m延伸至距注水井93m。高凝油油藏冷伤害特征的数值模拟结果,可为高凝油油藏的合理开发提供理论依据。

Aiming at the better understanding of cooling damage to high pour-point oil reservoirs ,a nu-merical simulation was performed .The coupled multi-field equations solved by numerical method were used in describing the process of injecting cold water in high pour-point oil reservoirs based on the physical mod-el of phase component in pores ,governing equation of wax precipitation and the water-oil phase flow math-ematical model and temperature field mathematical model .The simulation results show that the ratio of permeability after water flooding to the original is about 0.85 within 50 meters from injection well after 30 hours of water injection .The ratio of permeability after water flooding to the original nearby the injector wellbore is constantly 0.87 from the start of injection to 30 hours after injection .The cooling damage range extends from 15 to 93 meters as water injection time extends from 5 to 30 hours .The numerical simulation results of cooling damage to high pour-point oil

为了确定油田注水管网中注水方案,采用一种正演反演迭代的算法。该算法的主要思想是:对于油田注水管网首先进行反演计算,计算泵站的需求流量,然后进行正演计算,判断所有注水井是否满足配注要求,如果所有注水井满足配注要求则停止计算,否则减少不满足的注水井一定步长的需求配注流量,进入下一次迭代运算。该算法不需要列写注水管网系统方程组,实现简单,使用迭代方法,适合计算机编程。实验结果表明,该算法具有快速性和准确性。

For determining the injection program of oilfield water injection pipe network,a forward and iterative inversion iterative algorithm is adopted in this paper. The main idea of this algorithm is:calculate the demand flow of pump station according to inversion calculation of oilfield water injection pipe network,and then judge whether all the water injection wells have met the water injection requirements according to the forward calculation. If all the wells meet the water injection requirements,the calculation is stopped. If not,the algorithm reduces the demand flow of the wells which do not meet the requirements,and then enter into the next iterative operation. The algorithm does not need to write equations of the water injection pipe network system. The algorithm is simple and the iterative method is suitable for computer programming. The experimental results show that the al-gorithm is fast and accurate.

地热田回灌补源是实现地热能资源可持续开发的新技术，用于解决地热能补给，提高地热能利用率。其方法是在距开采井一定距离，施工一眼注水井，通过注水井向地下注入一定比例的水量与热源再交换，提高热能资源量。介绍了对注水井实施压裂、增加对地热井注水量的新工艺。经水力压裂和抽水试验，增注水效果明显，为我国合理开采利用和保护地热能资源提供了一种新的技术方法。

The groundwater recharge for geothermal field is a new technology to realize the geothermal energy resources sus-tainable development, solve the geothermal energy supply and improve the utilization efficiency of geothermal energy.The technical method is implemented by a water injection well constructed at a certain distance from the exploiting well, by ex-change of certain proportion water injected to underground through injection well and the heat source to improve the heat re-source.This paper introduces a new technology to increase the geothermal well injection by fracturing the water into injec-tion well.By hydraulic fracturing and pumping tests, obvious effect of water injection increase is obtained, which provides a new technical method for reasonable exploitation and protection of geothermal energy resources for China.