本文详细阐述了水平井的各流动阶段及各阶段的试井曲线特征,通过实例应用总结出了模型识别及曲线拟合经验,为以后水平井试井解释工作提供参考.

由于CO2腐蚀的影响因素很多,腐蚀机理异常复杂,要建立准确、普适的预测模型较为困难.利用高温、高压动态挂片腐蚀仪,模拟徐深1井地质及生产条件,开展室内腐蚀实验并分析徐深1井井筒腐蚀规律.结果证明:随着温度的升高,N80钢的腐蚀速率先增大后减小,75℃时腐蚀速率达到最大值;随后随着温度的升高,腐蚀速率开始急剧降低.在DWM腐蚀预测模型基础上,利用室内实验数据,采取多元线性回归的方法建立了适合大庆徐深气田的腐蚀速率预测模型,与现场腐蚀监测数据及现场腐蚀情况对比,预测模型符合率较高.

介绍了靖边气田低压气井洗井作业中面临的难题,低伤害洗井工艺技术现状,氮气泡沫液性能试验分析以及现场应用效果,试验证实氮气泡沫洗井工艺可以有效的减少地层漏失,携砂性能好,在靖边气田低压气井的洗井作业中,效果良好,对地层伤害小,有利于低压气井的产量恢复.

Jingbian gas plant which in the middle of Ordos Basin,is developing natural gas under the ancient main floor Majiagou ordovician carbonate reservoir,The gas reservoir is permeability,low abundance of dry gas reservoir,little boundless and bottom water,there are some relatively water-rich areas in the local field.There have been found 7 water-rich areas and 61 production water single wells.With the formation pressure reducing,lower liquid carrying capacity of gas wells,or even appearing wellbore fluid which caused no well production, all of the above seriously affected the efficient development of gas wells producing water.Combined the characteristics of Jingbian gas plant development techniques,we carried out gas lift drainage technology research,initially formed 6 gas lift drainage matching technologies which suit gas wells producing water in Jingbian gas plant.Through field applications in recent years,these 6 gas lift drainage matching technologies have been proved that are economical,reliable,efficient,and have becomed the main technical means in developing gas wells producing water of Jingbian gas plant,will be a model of developing wells producing water to the same gas reservoir.

With the continued development of Jingbian gasfield,reservoir pressure gradually decreases.In the workover process of low-pressure gas well,a large number of kill fluids leak into the formation,which can cause formation damage and result that the crud and sand cannot be washed effectively due to well washing circulation cannot be set up, affecting the normal production of gas wells.This paper takes the in-depth analysis of the technical difficulties existed in low pressure gas wells washing of Jingbian gas field,optimizing the Nitrogen foam sand-washing well technology through laboratory experiment and carrying out field application test.The results show that nitrogen foam sand-washing well technology can effectively reduce the leakage of flushing fluids,reduce formation damage and improve the sand carrying property,ensuring the rapid recovery of low-pressure gas well production.

To solve the problems such as acid maldistribution,incomplete reservoir stimulation,a big risk of downhole stuck of coiled tubes and difficult drainage during the development of the horizontal wells in Jingbian gas fields,we carried out a study on the new technologies of the horizontal well testing by use of literature search,theoretical calculation,and field tests.Then,a series of proper stimulation technologies were adopted to the horizontal wells in Jingbian gas fields.(1)The technology of deep acid-fracturing treatment by evenly distributed acid while drawing coiled tubes achieved acid uniform distribution at the horizontal part and guaranteed that the gas producing formation was efficiently stimulated.(2)The structure of the operating tool string of coiled tubes was optimized,which eliminated the risk of tight pull and casing sticking.(3)The techniques on nitrogen gas generation system and coiled tube unloading were innovated,which achieved fast unloading for the horizontal wells and promoted the well to be put into operation in time.All the above technologies will provide robust technical support for the scale development of the horizontal wells in Jingbian gas fields.The results of field application show that the new techniques for well testing are with strong flexibility for Jingbian gas fields,which can be promoted in use.

In this paper,For the actual production status of water wells with high salinity formation in Jingbian gas field,Cluster analysis was used to conduct water production wells classification,Foaming pharmacy systematic evaluation method was used to evaluate and optimize the foaming pharmacy suitable for water wells in Jingbian gas field with foam drainage gas,Also a reasonable parameters is determined.simultaneously,the ground process matched with foam drainage gas is optimized and consummated in this paper. Finally,gas wells are optimized to conduct the field test and achieve good effects.

气液分离技术的机理有重力沉降、惯性碰撞、离心分离、静电吸引、扩散等,依据这些机理己经研制出许多实用的气液分离器,如重力分离器、旋风分离器、挡板式分离器、丝网分离器等。靖边气田开发初期,分离器是按照纯气层的地质状况设计的,主要用在脱水撬前对天然气进行分离,目的是分离出天然气中的游离水及携带的固体杂质,避免高矿化度的游离水及固体杂质进入脱水撬,影响脱水撬的正常运行。但随着气田的不断开发,使得原有的分离器无法对气液进行有效分离,个别集气站露点不合格,脱水撬结晶盐堵塞等问题频繁发生。本文对国内外常用分离器的分离特性及发展概况进行了调研,对强制旋流吸收吸附分离器和立式精细聚结分离器的结构原理及靖边气田现场试验应用情况进行效果评价,为靖边气田在开发中后期气液分离器的选型提供一定的参考依据。

According to the corrosion current status for MDEA regeneration tower of natural gas desulfurization unit in the changqing oilfield,the corrosion factors CO_2、H_2S、CO_2/H_2S/ H_2O and temperature are analyzed.The results showed that the regeneration tower was corroded by CO_2.The main corrosion factors for the proposed membrane separating technology and applied it to separate CO_2 from natural gas,reduced CO_2 from 6.9%to 3%, weakened degree of equipment corrosion.

In the gas production process,selecting correct equation to calculate minimum critical liquids carrying flow rate and to determine a reasonable gas production is very important.In this paper,three existing liquid models are annlysed and evaluated on water wells of Jingbian gas field;a new equation for this minimum flow rate is established based on the existing modles.Simultaneously,the equation for minimum critical foam carrying flow rate of foaming gas wells is also established.

介绍了新式高压液压隔膜注醇泵的构造、安装调试以及运行维护情况,对该设备的试验运行状况和优缺点做出了分析总结。