毕业设计---油田环空压力异常高压气井风险分析

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1、西安石油大学本科毕业设计（论文） 塔里木油田环空压力异常高压气井风险分析 摘 要 ： 塔里木克拉气田和迪那气田在生产过程中，部分单井出现环空生产套压、技术套压异常升高的现象，从而影响到安全生产。针对这一现象，本文选取了 4 口气井，通过对其进行静态和动态两方面的分析，进行风险排查，保障安全生产；静态分析包括井身结构、井口装置和固井质量分析；动态分析包括对气井自开井以来的油压、生产套压、技术套压进行综合分析，绘制出变化曲线，分析其压力异常变化的原因。经过分析，四口气井均存在生产套压（ A 环空压力）过高的问题，其中KL2-6 生产初期生产套压超过许可最 低压力 35MPa 风险较高； DN2-4

2、 的 A、 B、 C3层环空压力整体过高，存在生产风险。引起环空压力异常的原因主要有两方面：第一是 由于环空之间存在微渗点，引起环空压力异常升高 。 第二是 油管温度过高引起的暂时性的压力上升 。 关键词： 塔里木油田；高压气井；环空压力异常；风险分析 西安石油大学本科毕业设计（论文） RISK EVALUATION OF ABNORMAL ANNULAR HIGH-PRESSURE IN TARIM OILFIELD Abstract： During the process of development and production in the Kela2 and Dina2 gas fi

3、eld， the production casing head pressure and technical casing head pressure of some single wells have increased abnormally This phenomenon has affected the safety production of single wells In response to this phenomenon， 4 gas wells were selected in this paper In order to eliminate hidden dangers a

4、nd guarantee safety in production， the assessment and analysis of two side include static and dynamic were carried on The static analysis include well-structure， well-head device and the quality of cementing； The dynamic assessments include the Integrated analysis to oil-pressure， casing head pressu

5、re and technical casing head pressure from open well Then draw curves and analysis the reasons which lead to abnormal pressure Though the risk assessments for gas well， 4 gas well appear to have the same problems which have high abnormal annular pressure. The annular A of KL2-6 gas well has above th

6、e lowest permission pressure which led to high risk of production. The 3 annular pressure of DN2-4 were high and there exist risk. There are two mainly factors which result in high annular pressure: on one hand， it maybe permeation between two cases； on the other hand， the high temperature may led to high pressure. Key words： tarim oilfield； high-pressure gas well； abnormal pressure in annular； risk analysis