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首页> 外文会议>2006 SPE International Oil amp; Gas Conference and Exhibition in China >SAGD as Follow-Up to Cyclic Steam Stimulation in a Medium Deep and Extraheavy-Oil Reservoir
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SAGD as Follow-Up to Cyclic Steam Stimulation in a Medium Deep and Extraheavy-Oil Reservoir

机译：SAGD作为中等深度和超稠油油藏中循环蒸汽刺激的后续措施

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摘要

Guan-tao oil layer of Shu 1 Block in Liaohe oilfield is arnmedium deep and extra heavy oil reservoir, which has highrnporosity and high perm with edge water. In 2001, cyclic steamrnstimulation was applied with square well pattern and wellspacern70m. After 9-10 cycles the stimulation developmentrneffect deteriorated and the degree of reserve recovery was onlyrnabout 15%.To seek development method of extra heavy oilrnreservoir and improve the entirety recovery ratio of this block,rnafter the feasibility research on SAGD technology in Guan-taornoil layer was finished, horizontal wells were infilled betweenrnvertical wells and 4 SAGD pilot test well groups combiningrnvertical wells with horizontal wells were conducted Threerncycles of cyclic steam stimulation to preheat the formation andrndecrease pressure were proceeded and the 4 well groups hadrnproduced for 1 year after converted to SAGD. Daily oilrnproduction capacity of single horizontal well increased fromrnthe initial 20-40t/d to 70-80 t/d after the multiple adjustmentrnof the injection-production parameters. Preferable periodrneffect was accomplished and the test provides good guide forrnsame medium deep and extra heavy oil reservoir to changerntheir development methods.
机译：辽河油田蜀一区块冠陶油层为中等深度的超稠油油藏，孔隙度高，边缘水渗透率高。 2001年，采用方形井眼，井距70m进行了周期性注汽。经过9-10个循环后，增产效果恶化，储量采收率仅为15％左右。在关塔角油层进行SAGD技术可行性研究后，寻求超稠油油藏开发方法，提高该区块的整体采收率。完成后，在垂直井之间充填水平井，并进行了4个SAGD试验井组，将垂直井与水平井相结合。进行了三个周期的蒸汽循环预热，降低了地层压力，并在转换为SAGD后的4个井组中连续生产了1年。多次调整注采参数后，单口水平井的日产油量从最初的20-40t / d增加到70-80t / d。达到了较好的时期效果，该试验为改变中深层和超稠油油藏的开发方法提供了很好的指导。

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