川渝气田含硫气井井下取垢工具研制及应用

发布时间：2018-06-24 06:03

  本文选题：川渝气田 + 含硫气井　； 参考：《西南石油大学》2016年硕士论文

【摘要】：近年来,川渝地区气田频繁发生井下结垢,使气井无法正常生产。目前井下垢样主要来自修井起出的井下油管壁面、通井规以及解堵后返排出的残余堵塞物等,均存在不同程度的失真,如垢样从目的地取到地面的过程中,温度压力的改变可能导致垢样的相态发生相应的变化。而常规取垢工具在上提的过程中易与油管壁发生摩擦或者碰撞,导致垢物脱落,取垢作业成功率低。为此,本文针对上述问题主要开展了如下工作：(1)对国内外气田井下结垢堵塞情况进行了调研,重点分析了川中油气矿、重庆气矿、川东北气矿部分气井堵塞情况,井下垢物成分主要为酰胺化合物、矿物油、有机酸、Ca、Mg、Fe、S等,引起垢物产生的原因为缓蚀剂、井下腐蚀物、水合物及单质硫的沉积等。(2)调研了国内外气井常见井下取样工具,针对川渝地区油管内常见褐黑色软垢及普遍含H2S的现状,使用SolidWorks软件设计出一种筒式井下垢物取样器(文中简称为取垢器),主要由球座、堵球、销钉、取样筒主杆、打捞头等零部件组成。(3)采用SolidWorks软件中的Simulation模块对筒式井下垢物取样器进行了静力学分析,分析了70MPa条件下取垢器应力分布、位移形变、安全系数等。并对取垢器连接螺纹抗拉强度和抗扭强度进行验算,同时对材质进行了耐H2S腐蚀性实验。(4)研制了筒式井下垢物取样器试样,开展了室内材质验证、尺寸检测、承压耐温等实验,证实该工具能满足含硫150℃及70MPa高温高压的工作环境。在940m采气工艺模拟实验井进行了水平管及垂直管模拟取垢实验,成功获取了模拟堵塞垢物。(5)针对川东北气矿HL004-2井展开取垢作业,深入分析了其生产概况,设计了取垢工艺流程,并对解堵效果进行了跟踪评价。
[Abstract]:In recent years, gas fields in Sichuan and Chongqing area occur frequently downhole scaling, which makes gas wells unable to produce normally. At present, the downhole scale samples mainly come from the wall of the downhole tubing from the workover, the through well rules and the residual plugging material released after removing the plugging, all of which have different degrees of distortion, such as the process of the scale sample being taken from the destination to the ground. The change of temperature and pressure may lead to the corresponding change of the phase state of the scale sample. However, the conventional scale removal tools are easy to rub or collide with the oil pipe wall in the process of lifting up, resulting in the scaling matter falling off, and the success rate of scale extraction is low. To solve the above problems, this paper mainly carried out the following work: (1) the investigation of scale and blockage in gas fields at home and abroad was carried out, with emphasis on the analysis of the blockage of gas wells in middle Sichuan, Chongqing gas and northeast Sichuan gas mines. The main components of downhole scale are amide-compound, mineral oil, organic acid CaMg-Mg-FES and so on, which are caused by corrosion inhibitor, downhole corrosion material, hydrate and deposition of simple sulfur. (2) the common underground sampling tools of gas wells at home and abroad are investigated. In view of the common brown-black soft fouling and H2S content in oil pipes in Sichuan and Chongqing areas, a downhole scale sampler is designed with SolidWorks software, which is mainly composed of ball base, ball block, pin and main rod of sampling tube. (3) Simulation module in SolidWorks software is used to analyze the statics of the downhole scale sampler, and the stress distribution, displacement deformation and safety factor of the downhole scale sampler are analyzed at 70 MPA. The tensile strength and torsional strength of the connecting thread of the scale extractor are checked and calculated. At the same time, the corrosion resistance of the material is tested. (4) the sample of the downhole scale sampler is developed, and the indoor material verification, dimension measurement, pressure and temperature resistance experiments are carried out. It is proved that the tool can meet the working conditions of 150 鈩，

本文编号：2060342