反卷积试井分析技术研究与应用

发布时间：2018-06-10 07:44

本文选题：卷积 + 反卷积　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：反卷积计算的本质是最优化,通过对实测资料的优化处理,构造出理想的、等效的、对应于相同时间段内以恒定产量生产条件下的压力变化,得到测试全部过程的压力响应,其探测范围比任何一段压力恢复都要大得多,而且不存在简化产量、叠加计算等所带来的影响,也不存在产量史的不完整而造成的误差,可获得比常规试井解释更多、更可靠的解释结果。本文从反卷积的意义出发,论述了反卷积方法、Schroeter方法和Levitan方法并通过模拟数值实验,研究了反卷积的工作过程。同时对该方法的敏感性、使用条件、优势及局限性也进行了探讨。针对特低渗透油藏关井压力恢复时间短,利用常规解释方法计算的探测半径有限,严重影响后续布井方式和布井数量等问题,本文将反卷积方法应用于特低渗透油藏中,通过试井设计分析了影响特低渗透砂岩油藏试井解释的主要因素,证明了反卷积算法的有效性和优越性。本文将反卷积试井技术应用于普光气田和内蒙探区低渗透油藏中,通过13井次的实际现场应用,解决了低渗透油气藏测试过程中长期关井作业占产问题;解决了普光高含H_2S、CO_2等腐蚀性气体时,长时间采用钢丝测试存在含硫气体泄露以及井工具落井等较大安全隐患问题;解决了大量由关井测试时间短导致测试资料存在多解性以及探测范围小等问题。
[Abstract]:The essence of deconvolution calculation is optimization. By optimizing the measured data, the ideal, equivalent, corresponding pressure variation under constant production conditions in the same period of time is constructed, and the pressure response of the whole testing process is obtained. Its detection range is much larger than any section of pressure recovery, and there is no effect of simplified production rate, superposition calculation, etc., and there is no error caused by incomplete production history, which can obtain more explanations than conventional well testing. A more reliable explanation of the results. Based on the significance of deconvolution, this paper discusses the deconvolution methods, Schroeter method and Levitan method, and studies the working process of deconvolution through numerical simulation experiments. The sensitivity, application conditions, advantages and limitations of the method are also discussed. In view of the short recovery time of shut-in pressure in ultra-low permeability reservoirs and the limited detection radius calculated by conventional interpretation methods, which seriously affect the subsequent well layout and the number of wells, this paper applies the deconvolution method to ultra-low permeability reservoirs. The main factors influencing well test interpretation of ultra-low permeability sandstone reservoir are analyzed through well test design, and the effectiveness and superiority of deconvolution algorithm are proved. In this paper, the deconvolution well testing technology is applied to Puguang gas field and low permeability reservoirs in Inner Mongolia exploration area. Through the actual field application of 13 wells, the problem of long term shut-in operation in low permeability reservoir testing process is solved. In the case of high H2SCO2 corrosion gas in Puguang, long time steel wire is used to test the sulfur gas leakage and the safety problems such as tool falling down well are solved. A lot of problems such as multi-solution and small detection range caused by short well shut-in test time are solved.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE353

【参考文献】