辽河盆地杜813块超稠油开发技术研究

发布时间：2018-01-25 08:21

本文关键词： 杜813块超稠油组合开发方式蒸汽吞吐　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：辽河油田已探明稠油地质储量10.5亿吨,可动用稠油储量7.4亿吨,稠油产量已占辽河盆地总产量的65%以上。杜813块位于辽河盆地西部凹陷西斜坡,于2003年开始陆续投入开发,开发目的层为兴隆台油层,含油面积2.18km2,上报石油地质储量1224×104t,是欢喜岭采油厂唯一的稠油区块。目前采油速度0.79%,采出程度6.75%,为实现杜813块持续稳产,针对杜813块油藏特性,结合其开发历史及存在的问题,寻求适合本区块的开发方式。稠油区块的开发主要有蒸汽吞吐、蒸汽驱、氮气泡沫驱、二氧化碳吞吐技术等开发方式。蒸汽驱和氮气泡沫驱技术由于对油井的选择有较大的限制,二氧化碳吞吐技术对储层物性要求较高,不适合一般性的稠油油藏开发。蒸汽吞吐是周期性的将干度为75%的蒸汽注入地层,对油层加热,以降低其粘度,提高原油流动性进行开采的一种方式,原油采收率通常为25%左右。因此对于超稠油油藏及不适合进行蒸汽驱开采的稠油油藏,蒸汽吞吐是一种有效的开采方式。杜813块采用蒸汽吞吐开发方式以来,目前区块主要存在着地层压力低、原油粘度大,老井排水期长、油井注汽干扰现象逐步加剧、油井出砂现象严重、油层吸汽不均、井下技术状况差、油井出水原因复杂等问题。根据杜813区块稠油油藏的开发潜力,并结合该区块油藏条件及区块物质基础、钻完井工程、注采工艺技术、地面工程技术分析,进行了蒸汽吞吐的适应性和可行性研究,在此基础上进行了试验,经历了开发试验阶段、滚动开发阶段、技术攻关阶段,并采取水平井加密、组合式蒸汽吞吐等措施提高储量动用程度。
[Abstract]:Liaohe Oilfield has proven oil geological reserves of 10.5 tons, capable of producing heavy oil reserves of 7.4 tons, heavy oil production accounted for more than 65% of the total output of Liaohe basin. Du 813 block is located in the west slope of Western Sag of Liaohe basin, began to put into development in 2003, the development of the target layer for Xinglongtai oil layer, the oil area 2.18km2, reported to the oil geological reserves of 1224 * 104t is Huanxiling oil production plant in heavy oil block. The only current production rate is 0.79%, the recovery level of 6.75%, to achieve sustained and stable block Du 813 block Du 813, according to the reservoir characteristics, combined with its development history and existing problems, to seek for this block development. Development of heavy oil block main steam, steam flooding, foam flooding, carbon dioxide injection technology development. Steam flooding and foam flooding technology due to the well choose the limit, carbon dioxide injection technology on reservoir The request of high, not suitable for the development of heavy oil reservoir in general. Steam stimulation is periodic dry degree of 75% steam is injected into the formation of oil heating, to reduce the viscosity and improve the fluidity of the crude oil was a way of mining, oil recovery is usually about 25%. So for the super heavy oil reservoir and suitable for heavy oil reservoir steam flooding, steam stimulation is an effective exploitation. Du 813 block by way of steam stimulation development since the current block exists the problems of low formation pressure, high viscosity, well drainage period, oil steam injection interference phenomenon gradually increased, the sand reservoir steam phenomenon is serious. Not all, downhole conditions, the cause of the problem. According to the complex water well Du 813 block reservoir development potential, and combined with the reservoir conditions and block material foundation, drilling engineering, injection production technology. Operation, analysis of surface engineering technology, the adaptability and feasibility study of steam injection, on the basis of the test, through the test development stage, rolling development stage, the stage of technical research, and adopt horizontal encryption, combined steam and other measures to improve the producing degree of reserves.

【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】：TE345

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