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首页> 外文会议>SPE Improved Oil Recovery Symposium >Application of a Novel Amylum-Cellulose Nutrient System for Microbial Flooding in Dagang Oilfield, China
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Application of a Novel Amylum-Cellulose Nutrient System for Microbial Flooding in Dagang Oilfield, China

机译：一种新型淀粉纤维素营养系统在中国大港油田微生物泛滥的应用

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Microorganisms inhabiting oil reservoirs can be used for microbial enhanced oil recovery (MEOR) due to their high adoptability and ability to produce oil-releasing metabolites in-situ. The compositions and function of the nutrient injected for stimulation of microbial activity is one of the keys to successful the technology. In our previous studies, we found that depletion of nutrient blend due to presence of "thief zone" with high rock permeability, led to insufficient activity of indigenous microorganisms in reservoirs. Eventually the poor additional oil production was observed. Novel multi functional amylum-cellulose nutrient was developed in this study to provide both nutrition for microorganisms as well as material for modify profile. Reservoir physico-chemical characteristics, concentration of nutrients and microbial activity were surveyed systematically. It was shown, that nutrient activated microbial growth under aerobic and anaerobic condition, and hydrocarbon oxidizing bacteria and fermentative microorganisms played most considerable roles in microbial consortia. Microorganisms were able to oxidize oil to CH4 and CO2 with excretion hydrocarbon emulsifiers and other biosurfactants (rhamnoilpid with C6-C12 long chain fatty acid). Heterogeneous sandpacked column model with three stages nutrients flooding release delaying nutrient solution breakthrough front and enlarged effect range of microorganisms due to viscosity production, particles of cellulose and zoogloea on surface of cellulose particle while bacteria growth. Synergetic MEOR effect of the thief zone plugging and local oil displacement resulted in 15-20% increase of oil recovery in comparison with regular water flooding. The field pilots were carried out in blocks. Special nutrient (75 tons) was injected and followed by monthly injections of 32000 cubic meters of air/water blend. The shift in microbial activities and other reservoir parameters was monitored. The injection water pressure was increased 2.2MPa and 5075 bbl of oil was increased.
机译：由于它们的高可持续性和能力，可以使用居住的储物液居住的储油储存器的微生物增强的采油（Meor）用于原位产生释放代谢物的能力。注入用于刺激微生物活动的营养素的组合物和功能是成功的键之一。在我们以前的研究中，我们发现由于存在具有高岩石渗透率的“小偷区域”的存在而耗尽营养混合物，导致储层中的土着微生物的活性不足。最终观察到额外的石油产量。在该研究中开发了新型多功能淀粉纤维素营养素，以提供微生物的营养以及用于修饰型材的材料。系统地调查了储层物理化学特性，营养素浓度和微生物活性。结果表明，在有氧和厌氧条件下的营养活性微生物生长，氧化碳化细菌和发酵微生物在微生物组织中发挥了最相当大的作用。微生物能够用排泄烃乳化剂和其他生物表面活性剂（用C6-C12长链脂肪酸的Rhamnoilpid）氧化油至CH 4和CO 2。异质砂包柱模型，三个阶段营养液体促进延迟营养液突破正面和微生物的扩大效果范围由于粘度生产，纤维素颗粒颗粒和纤维素粒子表面上的粒子生长。盗贼堵塞和局部油位移的协同态度效应导致了与普通水洪水相比，储存的储存量增加了15-20％。现场飞行员在块中进行。注入特殊的营养素（75吨），然后每月注射32000立方米的空气/水混合物。监测微生物活性和其他储层参数的转变。注射水压力增加2.2MPa和5075个油的油增加。

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