普光气田关井油压恢复异常浅析

普光气田为国内首例开发的超深高酸性气田。单井产能高,关井后油压恢复出现随关井时间延长持续下降的异常情况。通过综合考虑井筒中各种因素,特别是温度的影响,引进井筒效应的概念,从理论上分析了高产纯气井在纯井筒储存和径向流动阶段,产生井口油压动态异常的机理,包括产生的条件及适用范围.研究表明,引起高产气井产生井口油压动态异常的主要原因是关井过程中井筒流体温度的变化和重组分的密度差异引起。因此,在井底压力的计算过程中,必须考虑井筒流体温度和重组份的影响。

普光气田关井油压恢复异常浅析

普光气田为国内首例开发的超深高酸性气田，单井产能高，关井后油压恢复出现随关井时间延长持续下降的异常情况。通过综合考虑井筒中各种因素，特别是温度的影响，引进井筒效应的概念，从理论上分析了高产纯气井在纯井筒储存和径向流动阶段产生井口油压动态异常的机理。包括产生的条件及适用范围。研究表明，引起高产气井产生井口油压动态异常的主要原因是关井过程中井筒流体温度的变化和重组分的密度差异。因此，在井底压力的计算过程中，必须考虑井筒流体温度和重组分的影响。

井口射流掺水工艺的探讨

本文介绍一种新的井口掺水集油工艺－射流掺水工艺，本工艺可以解决传统掺水工艺存在的掺水能量未充分利用的问题，可以降低抽油机井井口油压，达到提高抽油泵泵效、增加油井产量、节电、提高抽油机井系统效率的目的。

伊拉克Ahdeb油田停喷时间预测

Ahdeb油田是中国石油在伊拉克第1个成功建产的油田,采用丛式水平井线性注采井网开发。油井停喷时间预测是单井合理配产和确定油田建产规模的重要依据,以往的研究通常只是确定停喷条件,对停喷时间没有现成的方法可借鉴。采用井口油压下降预测法、最小井底流压法和最小地层压力法3种方法对Ahdeb油田油井进行了停喷时间预测。现场应用表明,最小井口油压法预测结果最符合实际开发情况,对投产初期油田的生产管理具有重要指导意义。

合理压降速率配产法在ZJ气田的应用

ZJ气田沙溪庙组气藏是定容封闭弹性气驱气藏,该气藏因产量任务重,严重缺乏各类动态监测资料,无法用常规方法确定气井的合理产量。本文基于流动物质平衡方程推导出了一种根据井口压降速率计算气井合理产量的方法。单井实例表明,调整气井合理产量后,稳产期从0增加至20个月。将该方法运用到ZJ气田沙溪庙组气藏实际生产中,取得良好效果,稳产井数在原有基础上增加了40%,平均稳产期增加8个月。矿场实施表明此法简便可行,能够满足气井较长时间稳产的需求。

双通道验封仪现场应用问题分析及处理

本文主要是对测试班组在使用双通道验封仪进行注水井验封过程中遇到的各种问题结合实际情况加以研究和分析,思考解决办法,从而达到指导实际生产施工,提高水井验封测试成功率的目的。

Reasons resulting in the collapsed tubing near wellhead in high pressure and high temperature deep well during well testing and measures to prevent the collapsing

Because various reasons, the tubing near wellhead was collapsed during well testing in high pressure and high temperature deep well when the outer pressure was less than collapsing strength. To find the reasons in the abnormally collapse and countermeasures, first the quality of the tubing was checked. It was founded that the collapse was not resulted from the defect of the tubing. Then, force and stress exerted in the tubing was analyzed taking XS2 well as an example. The analysis results were concluded as follows. The collapsing strength of tubing decreased due to the axial tensile, which is seriously at the upper tubing especially. During injecting, the additional axial force that was caused by the temperature effect increased the tubing near wellhead to suffer axial tensile and further reduced the collapsing strength of tubing near wellhead. Reinforcing defect, prohibiting defect tubing to trip in hole, according to the calculation to impose appropriate annular pressure, selecting size nozzle to reverse pumping and controlling the reverse pumping speed and pressure, prohibiting to be opened flow and reducing or releasing the annular pressure can prevent the well testing tubing down-hole being collapsed at the wellhead.

机采井泵况智能诊断分析技术研究与应用

机采井现场憋泵是对泵况问题井核实诊断的重要手段之一,目前常规的井口憋泵诊断泵况的方式是采用指针式压力表,通过技术人员在现场实时观察压力变化来判断井下泵运行状况,并随时用纸笔来记录油压的变化情况,对记录的数据需要回到办公室经过整理后才能绘制出憋泵曲线。机采井运行时井口油压是一个实时变化的数据,不同井况的油压变化的程度和趋势都不尽相同,特别是井下泵况出现问题时.