长6油层含油污泥复配深度调剖驱油技术研究与应用

发布时间：2018-04-05 10:35

本文选题：含油污泥调剖　切入点：污泥来源　出处：《西安石油大学》2015年硕士论文

【摘要】：油田生产废弃物是油田开发和储运过程中产生的主要污染物之一,含油污泥和污染土壤得不到及时的处理,将会对开发生产区域环境造成不同程度的影响。随着国家对环保要求的越来越严格,含油土壤及含油污泥的无害化、减量化、资源化处理技术将成为油田废弃物处理技术发展的必然趋势。把污泥和药剂复合配方后重新回注到地层是一举两得的办法:含油污泥来自地层,又回注于地层,既处理了污泥,又具有调剖作用。本文对永宁油田长6油层含油污泥复配深度调剖技术进行了研究,对指导含油污泥调剖具有一定的意义。主要取得了以下认识:(1)研究区含油污泥的主要来源是①原油开采产生的含油污泥,主要来源于井口、井场和地面处理系统;②原油集输过程产生的含油污泥,在原油的集输过程中,原油流经接转站、油罐、隔油池底等设备,污水流经沉降罐、污水罐以及含油水处理设施均会产生含油污泥;(2)含油污泥的主要成分为泥质、水、油。研究区含油污泥的含水量分布在45.04%~50.03%,含油量分布在20.31%~25.42%,泥质含量分布在为21.55%~34.65%;(3)通过室内实验确定合适的悬浮剂、分散剂种类及固相颗粒的大小、浓度。最终我们确定的含油污泥调剖剂体系为90%含油污泥体系,其中悬浮剂0.10%~0.20%;M分散剂0.15%~2%;10%弱凝胶体系。(4)所配置的含油污泥调剖剂具有良好的耐温、耐剪切、热稳定性,温度由20℃度增加到100℃,凝胶的粘度保留率依旧可以达到87.5%,凝胶具有良好的耐温特性;凝胶在65℃条件下保存60d后,粘度保留率依旧可以达到77.3%,具有良好的热稳定性;在剪切速率达到100 S-1时,粘度保留依旧可以达到84.6%,表现出较好的抗剪切能力。(5)所配置的含油污泥调剖剂具有良好的封堵性。含油污泥调剖剂对岩心的封堵率达到了86.4%~96.4%,且对渗透率较低的岩心的封堵率小于渗透率较高的岩心,突破压力均在9Mpa以上,也表明了配制的含油污泥调剖剂对储层具有较好的封堵作用。(6)所配置的含油污泥调剖剂具有良好的选择性进入能力。随着调剖剂注入量的增加,其进入储层的阻力系数增加。但进入低渗透储层的阻力系数是高渗透储层的55倍左右。因此,污泥调剖剂基本上选择性进入了高渗透带。
[Abstract]:Waste oil production is one of the main pollutants in oilfield development and production process of storage, oily sludge and contaminated soil can not get timely treatment, will cause different effects on the development and production of regional environment. With the national environmental protection requirements of more and more strict, harmless, oil containing soil and oily sludge reduction, resources processing technology will become the inevitable trend of the development of oil field waste treatment technology. The sludge and chemical compound after re injected into the stratum is the way: oily sludge from shooting two birds with one stone formation, and into the ground, can not only dispose the sludge, but also has the profile control effect. This paper made a research on Yongning oilfield Chang 6 reservoir of oily sludge compound depth profile control technology, it has certain significance in oily sludge profile. The conclusions are as follows: (1) the main source of the study area is the crude oil sludge Oily sludge produced by mining, mainly from the wellhead, well site and ground treatment system; crude oil in oily sludge produced in the process of transportation, in crude oil gathering and transportation process, crude oil flows through the transfer station, oil tank, oil separation tank bottom equipment, sewage flows through the sedimentation tank, sewage tank and oily water treatment facilities will produce oil sludge; (2) the main component of oily sludge is muddy, water and oil. The study area of oily sludge moisture distribution in 45.04%~50.03%, the oil content distribution in 20.31%~25.42%, mud content distribution in 21.55%~34.65%; (3) through the indoor experiment to determine the appropriate suspending agent, dispersing agent and solid particle size. The concentration of system. Oily sludge profile control agent and eventually we defined 90% oily sludge system, the suspension of 0.10%~0.20% M 0.15%~2% 10%; dispersant; weak gel system. (4) the configuration of the oily sludge profile control agent has good resistance to high temperature. Shear, thermal stability, temperature increasing from 20 degrees to 100 degrees C, the gel viscosity retention rate can still reach 87.5%, the gel has good heat resistant properties; gel preservation of 60d under the condition of 65 DEG C, the viscosity retention rate can still reach 77.3%, with good thermal stability; shear rate reached 100 in S-1 still, the viscosity retention can reach 84.6%, showing good shear resistance. (5) oily sludge profile control agent configuration has good sealing. Oily sludge plugging agent on the core rate reached 86.4%~96.4%, and the sealing of the low permeability core was less than high permeability core, breakthrough the pressure is above 9Mpa, also shows that the oily sludge profile control agent has good plugging effect on reservoir. (6) oily sludge profile control agent configuration has good selectivity into ability. With the increasing of injection profile control agent In addition, the drag coefficient of reservoir entering reservoir increased. However, the drag coefficient of low permeability reservoir was 55 times higher than that of high permeability reservoir. Therefore, sludge profile control agent basically entered the high permeability zone.

【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357

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