哈萨克斯坦S区块K油田稠油油藏蒸汽吞吐开采技术研究与应用

发布时间：2018-06-17 15:08

本文选题：稠油 + 蒸汽吞吐　；参考：《东北石油大学》2016年硕士论文

【摘要】：哈萨克斯坦S区块K油田稠油油藏所处区域属于半沙漠型丘陵平原,盐碱地广泛发育,在常规的冷采开发过程中主要存在四大问题:油藏埋深浅,生产压差小,影响油井产量和增产效果;油稠流动性差,产能较低;构造平缓,边底水锥进严重,产量递减快;地层疏松,油层出砂严重,低温下形成砂泥有机质混合垢,造成油井产能急剧下降。为了改善该稠油油藏的开发效果,针对开发过程中存在的难题,调研了国内外蒸汽吞吐开采技术的研究现状,对哈萨克斯坦S区块K油田稠油油藏进行地质特征综合研究,选取自然开采、水驱及蒸汽吞吐开采方式进行论证,在哈萨克斯坦S区块K油田稠油油藏进行蒸汽吞吐开采技术可行性研究。通过油藏数值模拟等手段,对井型、井网与井距大小进行优化,并对影响蒸汽吞吐效果的注汽速度、蒸汽干度、注汽量、焖井时间进行参数优化;针对传统防砂方式的不足,进行完井防砂工艺优化研究,同时优化采油工艺,最终提出方案优化设计,并应用于哈萨克斯坦S区块K油田,取得了良好的开发效果。22口试验油井全部采用蒸汽吞吐投产,投产后日产油量最高达到12.4t,平均产油量是注汽前产油量的3倍,增产效果明显,累计增油17292t。现场应用效果表明,蒸汽吞吐开采技术适合哈萨克斯坦S区块K油田的稠油油藏,不仅改善了该油藏的开发效果,而且提高了该油田的采出程度,对类似稠油油藏的开发具有重要指导与借鉴意义。
[Abstract]:The heavy oil reservoir in S block of Kazakstan is located in a semi-desert hilly plain with extensive development of saline-alkali land. There are four main problems in the development of conventional cold production: shallow reservoir depth, small production pressure difference, Affecting oil well production and production increase effect; poor oil flow and low productivity; gentle structure, serious coning of edge and bottom water, rapid decline of production; loose formation, serious sand production in oil reservoir, formation of mixed scale of sand and organic matter at low temperature, Resulting in a sharp decline in oil production capacity. In order to improve the development effect of this heavy oil reservoir, in view of the problems existing in the development process, the present research situation of steam huff and puff production technology at home and abroad is investigated, and the geological characteristics of heavy oil reservoir in S block of Kazakhstan are studied synthetically. Natural exploitation, water drive and steam stimulation are selected to demonstrate the feasibility of steam huff and puff recovery in heavy oil reservoir in S block of Kazakstan. By means of reservoir numerical simulation, the well type, well pattern and well spacing are optimized, and the steam injection speed, steam dryness, steam injection rate and steaming time that affect the effect of steam huff and puff are optimized. The optimization of completion sand control technology and oil recovery technology were studied, and the scheme optimization design was put forward finally. It was applied to K oil field in S block of Kazakhstan, and good development effect was obtained. 22 test wells were all put into production by steam huff and puff, and all of them were put into production by steam huff and puff. The daily oil production is up to 12.4t, and the average oil production is 3 times of that before steam injection. The effect of increasing production is obvious, and the accumulative oil increment is 17292t. The field application results show that the steam stimulation technology is suitable for heavy oil reservoirs in K oilfield in S block of Kazakhstan, which not only improves the development effect of this reservoir, but also improves the recovery degree of the oil field. It has important guidance and reference significance for the development of similar heavy oil reservoirs.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE345

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