EOR

摘要： Based on the analysis of geological characteristics of ultra-deep fault-controlled fracture-cavity carbonate reservoirs and division of reservoir units, two physical models were made, and physical simulations of oil displacement by water injection were carried out to find out water flooding mechanism in the fault-controlled fracture-cavity carbonate reservoir under complex flow state. On this basis, a mathematical model of fault-controlled carbonate reservoir with coexisting seepage and free flow has been established. Pilot water injection tests have been carried out to evaluate the effects of enhancing oil recovery by water injection. The results show that: fault-controlled fracture-cavity carbonate reservoir units can be divided into three types:the strong natural energy connected type, the weak natural energy connected type and the weak natural energy isolated type;the fault-fracture activity index of the fault-controlled fractured-cavity body can effectively characterize the connectivity of the reservoir and predict the effective direction of water injection;the mathematical model of fault-controlled carbonate reservoir with coexisting seepage and free flows can quantitatively describe the fluid flow law in the fracture-cavity body;the water injected into the fault-controlled fracture-cavity body is weakly affected by the capillary force of the lithologic body, and the oil-water movement is mainly dominated by gravity. The development modes of single well water injection, unit water injection,and single well high pressure water injection proposed based on the connection structure of fracture-cavity space and well storage space configuration are confirmed effective by pilot tests, with obvious water injection gravity flooding effect.

摘要： The goal of the research was to investigate the profile control and oil displacement characteristics of the polymer nanoparticles after high temperature swelling.The displacement parameters showed considerable influence on the plugging effect of the high-temperature swelled polymer nanoparticles,such as the core permeability,concentration of nanoparticles in the suspension,swelling time and swelling temperature,which makes it flexible to control the plugging effect by controlling displacement experiments conditions.Experimental results show that polymer nanoparticles dispersion system with a concentration of 500 mg/L is suitable for cores plugging with a permeability of 30×10^(-3)-150×10^(-3)μm^(2),even after aging at 150°C for three months.The shunt flow experiments show that when the displacement factors are optimal values,the polymer nanoparticles after high temperature swelling to plug the high-permeability layer selectivity and almost do not clog the low-permeability layer.Oil recovery of homogeneous artificial core displacement experiment and a heterogeneous double-tube cores model are increased by 20%and 10.4%on the basis of water flooding.The polymer nanoparticles can be a great help for petroleum engineers to better apply this deep profile control and flooding technology.

摘要： As the traditional polymer stabilizer is eliminated to improve the injectability of foam in lowpermeability reservoirs,the stability,plugging capacity,conformance control and oil recovery performance of the surfactant-alternating-gas(SAG)foam become significantly important for determining its adaptability to permeability and heterogeneity,which were focused and experimentally researched in this paper.Results show that the SAG bubbles are highly stable in micron-sized channels and porous media(than in the conventional unconstrained graduated cylinder),making it possible to use in enhanced oil recovery(EOR).Such bubbles formed in porous media could be passively adjusted to match their diameter with the size of the pore.This endows the SAG foam with underlying excellent injectability and deep migration capacity.Permeability adaptability results indicate a reduced plugging capacity,but,increased incremental oil recovery by the SAG foam with decreased permeability.This makes it a good candidate for EOR over a wide range of permeability,however,parallel core floods demonstrate that there is a limiting heterogeneity for SAG application,which is determined to be a permeability contrast of 12.0(for a reservoir containing oil of 9.9 m Pa s).Beyond this limit,the foam would become ineffective.

摘要： 主要综述了用于提高油气采收率的不同类型纳米流体的基础纳米材料,分析了不同纳米材料的性质及EOR优势,对纳米材料的性能优化方法以及提高采收率的机理进行了总结归纳,并展望了未来的发展趋势和重点研究方向,为后期开发高效实用的纳米材料制备方法以及改性技术提供一定的参考。

摘要： cqvip:Based on the mechanisms of gravity displacement,miscibility,viscosity reduction,and imbibition in natural gas flooding,an integrated reservoir construction technology of oil displacement and underground gas storage(UGS)is proposed.This paper systemically describes the technical connotation,site selection principle and optimization process of operation parameters of the gas storage,and advantages of this technology.By making full use of the gravity displacement,miscibility,viscosity reduction,and imbibition features of natural gas flooding,the natural gas can be injected into oil reservoir to enhance oil recovery and build strategic gas storage at the same time,realizing the win-win situation of oil production and natural gas peak shaving.Compared with the gas reservoir storage,the integrated construction technology of gas storage has two profit models:increasing crude oil production and gas storage transfer fee,so it has better economic benefit.At the same time,in this kind of gas storage,gas is injected at high pressure in the initial stage of its construction,gas is injected and produced in small volume in the initial operation stage,and then in large volume in the middle and late operation stage.In this way,the gas storage wouldn’t have drastic changes in stress periodically,overcoming the shortcomings of large stress variations of gas reservoir storage during injection-production cycle due to large gas injection and production volume.The keys of this technology are site selection and evaluation of oil reservoir,and optimization of gravity displacement,displacement pressure,and gas storage operation parameters,etc.The pilot test shows that the technology has achieved initial success,which is a new idea for the rapid development of UGS construction in China.

摘要： 以丙烯酰胺(AM)、丙烯酸(AA)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、甲基丙烯酸二甲氨基乙酯-十二烷基溴(DMDB)为原料,通过自由基聚合法制备了AM/AA/AMPS/DMDB表面活性聚合物.利用红外光谱和核磁氢谱对聚合物进行结构表征,并考察了引发剂用量、单体质量分数、单体投加量等因素对聚合物溶液的表观黏度的影响.与部分水解聚丙烯酰胺(HPAM)进行对比,评价了其耐温、抗盐、抗剪切、抗老化、乳化性等性能.结果表明:该聚合物具有较好的耐温抗盐性,耐剪切和抗老化性也均优于HPAM;界面张力测试和乳化性测试表明该聚合物具有一定乳化性和降低界面张力的能力.

摘要： 为定量分析和描述热力EOR流程在提高页岩油和致密砂储层等多裂缝非常规资源产量方面的有效性,通过专门的未射孔井,直接注入热液(注入不会导致超低渗系统压力过度、不良相对渗透率状态等问题的液体),研究评估了不同温度下热液循环的功效。

摘要： A thorough literature review is conducted that pertains to low-salinity-based enhanced oil recovery(EOR).This is meant to be a comprehensive review of all the refereed published papers,conference papers,master’s theses and other reports in this area.The review is specifically focused on establishing various relations/characteristics or"screening criteria"such as:(1)classification/grouping of clays that have shown or are amenable to low-salinity benefits;(2)clay types vs.range of residual oil saturations;(3)API gravity and down hole oil viscosity range that is amenable for low salinity;(4)salinity range for EOR benefits;(5)pore sizes,porosity,absolute permeability and wettability range for low-salinity EOR;(6)continuous low-salinity injection vs.slug-wise injection;(7)grouping of possible low-salinity mechanisms;(8)contradictions or similarities between laboratory experiments and field evidence;and(9)compositional variations in tested low-salinity waters.A proposed screening criterion for low-salinity waterflooding is introduced.It can be concluded that either one or more of these mechanisms,or a combination thereof,may be the case-specific mechanism,i.e.,depending on the particular oil–brine–rock(OBR)system rather than something that is"universal"or universally applicable.Therefore,every OBR system that is unique or specific ought to be individually investigated to determine the benefits(if any)of low-salinity water injection;however,the proposed screening criteria may help in narrowing down some of the dominant responsible mechanisms.Although this review primarily focuses on sandstones,given the prominence of carbonates containing^60%of the world’s oil reserves,a summary of possible mechanisms and screening criteria,pertaining to low-salinity waterflooding,for carbonates is also included.Finally,the enhancement of polymer flooding by using low-salinity water as a makeup water to further decrease the residual oil saturation is also discussed.

摘要： An effective parameter in the miscible-CO_2 enhanced oil recovery procedure is the minimum miscibility pressure(MMP)defined as the lowest pressure that the oil in place and the injected gas into reservoir achieve miscibility at a given temperature. Flue gases released from power plants can provide an available source of CO_2,which would otherwise be emitted to the atmosphere, for injection into a reservoir. However, the costs related to gas extraction from flue gases is potentially high. Hence, greater understanding the role of impurities in miscibility characteristics between CO_2 and reservoir fluids helps to establish which impurities are tolerable and which are not. In this study, we simulate the effects of the impurities nitrogen(N_2), methane(C_1), ethane(C_2) and propane(C_3) on CO_2 MMP. The simulation results reveal that,as an impurity, nitrogen increases CO_2–oil MMP more so than methane. On the other hand, increasing the propane(C_3)content can lead to a significant decrease in CO_2 MMP, whereas varying the concentrations of ethane(C_2) does not have a significant effect on the minimum miscibility pressure of reservoir crude oil and CO_2 gas. The novel relationships established are particularly valuable in circumstances where MMP experimental data are not available.

摘要： 用不同的酸体系处理生产井和注入井已有一个多世纪了。把几种化学剂添加到酸中以便提高酸化处理的效果,包括各种类型的表面活性剂。

摘要： 用不同的酸体系处理生产井和注入井已有一个多世纪了。把几种化学剂添加到酸中以便提高酸化处理的效果,包括各种类型的表面活性剂。

摘要： 用不同的酸体系处理生产井和注入井已有一个多世纪了。把几种化学剂添加到酸中以便提高酸化处理的效果,包括各种类型的表面活性剂。

摘要： 用不同的酸体系处理生产井和注入井已有一个多世纪了。把几种化学剂添加到酸中以便提高酸化处理的效果,包括各种类型的表面活性剂。

摘要： 用不同的酸体系处理生产井和注入井已有一个多世纪了。把几种化学剂添加到酸中以便提高酸化处理的效果,包括各种类型的表面活性剂。

摘要： 用不同的酸体系处理生产井和注入井已有一个多世纪了。把几种化学剂添加到酸中以便提高酸化处理的效果,包括各种类型的表面活性剂。

摘要： 本文报道了用快速、低费用室内筛选方法确定和评价许多有前途的EOR表面活性剂的结果,该方法在选择与不同原油一起使用的最佳表面活性剂方面是非常有效的。rn 表面活性剂的最初选择是以所希望的表面活性剂结构为依据的。相态筛选有助于快速确定有利的表面活性剂配方。进行了矿化度扫描以便观测平衡时间、微乳液粘度、油和水增溶比以及界面张力。添加了助表面活性剂和助溶剂以便减少凝胶、液晶和粗乳状液并且促使低粘微乳液快速平衡。用这一方法把支链丙氧基硫酸盐、内烯基磺酸盐和支链α-烯基磺酸盐确定为良好的EOR表面活性剂。能够以低成本得到这些表面活性剂,并且这些表面活性剂可以与聚合物和碱(例如碳酸纳)配伍,因此是表面活性剂-聚合物和碱-表面活性剂-聚合物EOR工艺的良好候选对象。在砂岩和白云岩岩心中试验了一种最佳配方并且发现,这种配方的采收率很高,并且表面活性剂滞留量低。

摘要： 本文报道了用快速、低费用室内筛选方法确定和评价许多有前途的EOR表面活性剂的结果,该方法在选择与不同原油一起使用的最佳表面活性剂方面是非常有效的。rn 表面活性剂的最初选择是以所希望的表面活性剂结构为依据的。相态筛选有助于快速确定有利的表面活性剂配方。进行了矿化度扫描以便观测平衡时间、微乳液粘度、油和水增溶比以及界面张力。添加了助表面活性剂和助溶剂以便减少凝胶、液晶和粗乳状液并且促使低粘微乳液快速平衡。用这一方法把支链丙氧基硫酸盐、内烯基磺酸盐和支链α-烯基磺酸盐确定为良好的EOR表面活性剂。能够以低成本得到这些表面活性剂,并且这些表面活性剂可以与聚合物和碱(例如碳酸纳)配伍,因此是表面活性剂-聚合物和碱-表面活性剂-聚合物EOR工艺的良好候选对象。在砂岩和白云岩岩心中试验了一种最佳配方并且发现,这种配方的采收率很高,并且表面活性剂滞留量低。

摘要： 本文报道了用快速、低费用室内筛选方法确定和评价许多有前途的EOR表面活性剂的结果,该方法在选择与不同原油一起使用的最佳表面活性剂方面是非常有效的。rn 表面活性剂的最初选择是以所希望的表面活性剂结构为依据的。相态筛选有助于快速确定有利的表面活性剂配方。进行了矿化度扫描以便观测平衡时间、微乳液粘度、油和水增溶比以及界面张力。添加了助表面活性剂和助溶剂以便减少凝胶、液晶和粗乳状液并且促使低粘微乳液快速平衡。用这一方法把支链丙氧基硫酸盐、内烯基磺酸盐和支链α-烯基磺酸盐确定为良好的EOR表面活性剂。能够以低成本得到这些表面活性剂,并且这些表面活性剂可以与聚合物和碱(例如碳酸纳)配伍,因此是表面活性剂-聚合物和碱-表面活性剂-聚合物EOR工艺的良好候选对象。在砂岩和白云岩岩心中试验了一种最佳配方并且发现,这种配方的采收率很高,并且表面活性剂滞留量低。

摘要： 本文报道了用快速、低费用室内筛选方法确定和评价许多有前途的EOR表面活性剂的结果,该方法在选择与不同原油一起使用的最佳表面活性剂方面是非常有效的。rn 表面活性剂的最初选择是以所希望的表面活性剂结构为依据的。相态筛选有助于快速确定有利的表面活性剂配方。进行了矿化度扫描以便观测平衡时间、微乳液粘度、油和水增溶比以及界面张力。添加了助表面活性剂和助溶剂以便减少凝胶、液晶和粗乳状液并且促使低粘微乳液快速平衡。用这一方法把支链丙氧基硫酸盐、内烯基磺酸盐和支链α-烯基磺酸盐确定为良好的EOR表面活性剂。能够以低成本得到这些表面活性剂,并且这些表面活性剂可以与聚合物和碱(例如碳酸纳)配伍,因此是表面活性剂-聚合物和碱-表面活性剂-聚合物EOR工艺的良好候选对象。在砂岩和白云岩岩心中试验了一种最佳配方并且发现,这种配方的采收率很高,并且表面活性剂滞留量低。

摘要： 油采收通过如下提高：‑在过滤组件(1、2)中从海水中过滤固体，以制得经预处理的海水；‑在电容性去离子(CDI)组件(3)中进一步处理所述经预处理的海水，以制得经处理的海水(10)，所述电容性去离子组件具有在电性相反的电极(15、16)之间的用于经预处理的海水的流动路径(12)；以及‑将具有降低的盐度和固体含量的所述经处理的海水(10)注入地层中，以调动原油并提高油采收(EOR)。过滤&CDI组件(1‑3)提供了具有适用于EOR的纯度、盐度和TDS水平的经处理的海水(10)而无随后的与粗海水的再共混以再调节TDS水平，并且相比于已知的反渗透(RO)EOR海水处理单元对结垢敏感性更低，且耗能更低。

摘要： 本发明涉及实验室装置技术领域，提出了一种CO2‑EOR试验模拟柜及其使用方法，包括柜体和柜门，柜体与柜门转动连接，其特征在于，所述柜门上开设有转孔，还包括：转轴，所述转轴竖直放置，且所述转轴两端与所述柜门连接；转板，所述转板套设在转轴上；清洗池，所述清洗池设置在所述转板一侧，所述清洗池与所述转板连接，所述转板和所述柜门之间设置有防转组件。通过上述技术方案，解决了现有技术中由于远距离清洗实验器皿而影响实验效率的问题。

摘要： 本公开涉及可用于将试剂深入输送到烃储层的低分子量聚电解质复合物纳米颗粒。还提供了制造和使用所述聚电解质复合物纳米颗粒的方法。

摘要： 油采收通过如下提高：-在过滤组件(1、2)中从海水中过滤固体，以制得经预处理的海水；-在电容性去离子(CDI)组件(3)中进一步处理所述经预处理的海水，以制得经处理的海水(10)，所述电容性去离子组件具有在电性相反的电极(15、16)之间的用于经预处理的海水的流动路径(12)；以及-将具有降低的盐度和固体含量的所述经处理的海水(10)注入地层中，以调动原油并提高油采收(EOR)。过滤&CDI组件(1-3)提供了具有适用于EOR的纯度、盐度和TDS水平的经处理的海水(10)而无随后的与粗海水的再共混以再调节TDS水平，并且相比于已知的反渗透(RO)EOR海水处理单元对结垢敏感性更低，且耗能更低。

摘要： 本发明提供以阳离子覆盖成核，交叉渗透交联为核心技术的絮凝方法及所用药剂的组成与特征。;本发明主要用聚合物三次采油作业时采出液中部分水解聚丙烯酰胺(PHPAM)及其相似物(丙烯酰胺与丙烯酸或烯磺酸的共聚物)的絮凝分离及回注水的净化处理。处理前采出液一般含油(Oil)≤3000mg/l，固体悬浮物(S.S.)≤200mg/l，PHPAM≤600mg/l(PHPAM分子量范围为1×10-6～6×10-6，水解度为25～45％)处理后其含量为：Oil≤10mg/l，S.S.≤5mg/l，PHPAM≤30mg/l。

摘要： 本实用新型公开了一种变压吸附法EOR采出气CO

摘要： 本实用新型公开了一种薄膜分离法EOR采出气CO

摘要： 本实用新型公开了一种低温分馏与膜法联用的EOR采出气分离系统，用于CO

摘要： 本实用新型公开了一种变压吸附与低温分馏法联用的EOR采出气CO

摘要： 本实用新型公开了一种吸收-再生法EOR采出气CO