机械堵水工艺管柱研究

发布时间：2018-03-22 11:48

本文选题：超稠油　切入点：套变井　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：辽河油田油藏结构以稠油油藏为主,开采区块中稠油区块占据比例很大,其中曙光采油厂的超稠油藏开发都已经进入了吞吐后期,长期多轮次注水、注汽的吞吐降压开采,油井地层出水状况不断加剧、油层上部的套管补偿器出现严重损坏、套管损坏漏失等现象,导致油井含水量急剧增高,并且向油层倒灌的现象频繁出现,影响油井正常生产情况。同时,出现套管变形的油井的数量越来越多,变形后的套管无法通过常规的井下工具,并且现有的套变封隔器也已经无法满足油井生产的温度要求,使得大量高含水油井很难实施机械堵水工艺措施,严重影响此类油井的采收率。针对以上出现的多种问题提出了针对超稠油油井的机械堵水工艺管柱技术研究,目的是通过对7"套管井、5"套管井以及7"套管变形井的井下工艺管柱的原理、结构、形变等各方面的研究及优化,依此来丰富和完善超稠油油井的工艺增产措施,提高此类油井的最终采收率。针对超稠油井的机械堵水工艺技术在2009-2012年总计实施150余井次,累计增油总量为44100t,其中,超稠油笼统堵水工艺技术共实施50余井次,措施成功率达到100%,累计增油量为14303t;可掺洗式机械堵水技术共实施90余井次,措施成功率达到100%,累计增油量为29137t,;超稠油套变井机械堵水工艺技术共实施3井次,措施成功率达到100%,累计增油量为660t,满足了超稠油油井的实际生产需要,在油田的超稠油生产中发挥了巨大作用,取得巨大的经济效益和社会效益。针对超稠油井的机械堵水工艺技术的研究成功对辽河油田超稠油油井的常规生产、后期开采具有重要意义。
[Abstract]:The reservoir structure of Liaohe Oilfield is mainly heavy oil reservoir, and the heavy oil block occupies a large proportion in the production block. The development of super heavy oil reservoir in Shuguang Oil production Plant has entered the late stage of huff and puff, and the long term multiple rounds of water injection and steam injection are used for stimulation and pressure reduction. The water situation of the oil well formation is getting worse, the casing compensator in the upper part of the reservoir is seriously damaged, the casing damage is lost and so on, which causes the water content of the oil well to increase sharply, and the phenomenon of pouring back to the reservoir frequently. At the same time, the number of wells with casing deformation is increasing, the casing after deformation can not pass through conventional downhole tools, and the existing casing Packer can no longer meet the temperature requirements of oil well production. It is very difficult for a large number of high water cut wells to carry out mechanical water shutoff measures, which seriously affect the oil recovery of this kind of wells. In view of the above problems, the technical research of mechanical water shutoff technology for super heavy oil wells is put forward. The purpose of this paper is to enrich and perfect the measures for increasing production of super heavy oil wells by studying and optimizing the principle, structure and deformation of downhole process string of 7 "casing well" and 7 "casing deformation well." In 2009-2012, the mechanical water shutoff technology for super heavy oil wells has been implemented more than 150 times, with a cumulative total increase of 44100 tons, of which more than 50 times have been carried out in general water shutoff technology for super heavy oil wells. The success rate of the measures is 100 and the cumulative oil increment is 14303t, the mechanical plugging technology of water plugging by mixing and washing has been carried out for more than 90 wells, the success rate of the measures has reached 100, the accumulative oil increment is 29137t / t, and the mechanical water shutoff technology of ultra-heavy oil casing variable wells has been carried out for three times. The success rate of the measures reached 100 and the accumulative oil increment was 660 t, which satisfied the actual production needs of super heavy oil wells and played a great role in the production of super heavy oil in oil fields. The research on the technology of mechanical water shutoff for super heavy oil wells is of great significance to the conventional production of super heavy oil wells in Liaohe Oilfield and to the later stage of production.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE935

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