生物活性复合驱油技术在杏子川油田的应用

针对杏子川油田王214注水区采油速度低、采出程度低、综合递减率快、采收率低等问题,在配方筛选、评价研究的基础上,研制了一种新型生物活性复合驱油剂,并配套采用了低成本、操作简便的注入工艺,实际应用于王214井区现场试验.12个月内区块累计增油13 555t,预期提高采收率6.08%,阶段投入产出比达到1∶5.06.现场试验表明,生物活性复合驱油技术适应性良好,增产效果显著,适用于低渗透油田,具有广阔的推广前景.

复合驱油技术应用中推荐低浓度表活剂体系

复合驱的体系当中，驱油技术是十分重要的一项技术内容。长期的高频率使用，以至内部的表活剂浓度也随之增高。但是，随着科学技术的不断发展，我国的科学技术水平在不断的提高，低浓度表活剂的相关体系逐渐的出现在世人面前，并且在诸多复合型的驱油技术当中已经得到了充分的利用，同时也获得了相当不错的应用效果。文章将低浓度表活剂体系作为主要的研究对象，对其在复合驱油技术当中的充分应用进行了详细的研究，文章主要对其目前的应用现状情况进行了分析，并展望其在未来发展过程中的美好发展前景。

化学驱技术在XJ油田的应用研究

本文通过利用ECLIPSE二元和CMG三元数值模型方法,评价出了复合驱油体系中聚合物、碱和表面活性剂之间的协同作用。

三元复合驱举升工艺适应性认识

针对困扰三元复合驱举升工艺的因素进行分析 ,并将 3种举升工艺在三元复合驱的使用情况及经济效益进行对比 ,从中优选出适用于三元复合驱的举升工艺 ,为工业化推广提供依据。

弱碱三元复合驱采出液结垢特性及表面纳米化阻垢研究

通过现场采集垢样,采用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射(XRD)等微观测试技术对垢样的成分、表面形貌进行测试分析,判断其成垢过程及成垢物质,初步分析结垢原因。采用纳米复合化学镀和纳米复合电镀两种方法对材料进行表面纳米化处理,研究经表面纳米化后材料的阻垢性能,并对其阻垢机理进行初步探讨,为表面纳米化在弱碱三元复合驱阻垢方面的应用提供了科学依据。

三元复合驱采出液分离装置的优化研究

针对油田三元复合驱采出液乳化严重等特点,通过现场试验对油水分离器进行结构及操作条件的优化。现场试验结果表明,优化后的分离器对三元复合驱采出液的分离,油相和水相均达到采出液分离标准,且油水分离效率可达到98%以上。

稠油高轮次吞吐井复合驱油技术研究与应用

为提高稠油高轮次吞吐井后期开发效果,根据油井的不同原油物性、不同地层压力等情况,有针对性的研制与应用的两种稠油高轮次吞吐井复合驱油技术,解决了稠油进入高轮次吞吐后,由于层间矛盾突出、地层压力下降、原油粘度升高、地下存水增加等原因导致的稠油周期产量大幅度降低的问题,有效改善了高轮次井吞吐效果,提高了稠油采收率。

Study of the Chemical Flooding Effect in Gao-63 Reservoir

This article is aimed to discuss the impact of using two different kinds of surfactant in enhancing oil recovery in heterogeneous reservoirs. With the background of Jidong oilfield, Rui Feng surfactant which could reach ultra-low interracial tension and combination surfactant RZ-JD80 with strong emulsifying property are chosen to do oil displacement and profile control-oil displacement experiment in homogeneous core and heterogeneous core respectively. The experiment is aimed to study the effect of oil displacement by injecting surfactant individually and the effect after injecting different profile control agent slug before surfactant flooding in heterogeneous cores. The results suggest that injecting Rui Feng surfactant and RZ-JD80 individually could enhance the oil displacement efficiency about 15 percentage points for homogeneous core. For strongly heterogeneous core, it is low efficiency by using either of these two surfactants individually. However, if injected a very little profile control agent slug before surfactant flooding, both of these two kinds of surfactant could enhance the oil recovery by different degree, especially, polymer microsphere plugging^RZ-JD80 flooding composite technology is more adaptable to Gao-63 reservoir. This technology could increase the recovery by 18.52 percentage points aRer surfactant flooding.

Research on compound plugging removal technology and its application in Xinmu oilfield of Jilin

Most fault-block reservoirs in Xinmu oilfield belong to heterogeneous sandstone in characters which has low permeability, and reservoir pollution is a common phenomenon in this area. Acidizing deplugging in oil wells has become one of the major measures to improve production efficiency in the field. A compound deplug- ging technology in high efficiency low corrosion is developed for this kind of low permeability sandstone reser- voir. On the basis of profoundly understanding of the reservoir＇s physical properties and sensitivity, along with comprehensive analysis of the cause for jams in oil wells, a series of experiments are carried out in order to in- vestigate the dissolution reaction among samples and deplugging inhibitor, sample dissolving speed, formation fluid compatibility, reduction of secondary pollution, etc. Considered reservoir condition in nearby wells the op- timized compositional deplugging liquid formula is selected for this reservoir. It is featured by reducing the de- plugging reaction speed, extending solution for processing radius, preventing secondary damage in dissolution processing, and removing plug pollution effectively. To implement this high efficiency low corrosion deplugging measure based on reservoir condition in the borehole and nearby wells, a relatively better result of deplugging and production increasing is achieved, which enriches the measures to increase production in Xinmu oilfield, and this method can be applied to other similar oiffields for the purpose of maintaining the crude oil production and providing assistant for increasing the production significantly.

Research on the Ultrasonic Extraction Technology of Cottonseed Oil

[ Objective ] To optimize the ultrasonic extraction technology of cottonseed oil by response surface methodology. [ Method ] Based on the single factor experiment, the response surface method with three factors at three levels was adopted according to the principle of central composite design, The optimum extraction conditions of extraction duration, liquid-solid ratio and temperature were determined by regression analysis. [ Re- salt] The best ultrasonic extraction conditions of cottonseed oil were 35 min of extraction duration, 38 ℃ of extraction temperature and 56：6 of liquid-solid ratio. Under these conditions, the extraction rate of cottonseed oil could reach up to 45.81%, with a relative error of 0.13% from the theoreti-cal value of 45.94%. [ Conclusion] The method optimized the extraction technology and laid foundation for the further research of cottonseed oil. Key words Cottonseed oil; Ultrasonic extraction; Response surface method; China

大幅度提高石油采收率的基础研究

大幅度提高石油采收率是缓解我国油气资源紧张状况的有效途径。本项目以化学复合驱油技术为重点,以研制廉价、高效、环保的驱油剂为突破口,力求在基础理论方面取得重大突破,使化学复合驱形成生产力,得以大规模应用,从而大幅度提高石油采收率,创造巨大的经济效益和社会效益。化学复合驱油技术的驱油机理、物化现象及影响因素等异常复杂,许多基础理论问题尚未解决,因此距工业化应用仍有一定的差距。本文重点介绍项目拟解决的四个关键科学问题,即驱油体系的物理化学基础、驱油体系与油藏物理化学环境的相互作用、油层物理及油藏精细描述以及驱油体系在油层中的物化渗流与数值模拟的研究。