吉7井区稠油掺水集输工艺研究及应用

Research and Application of Heavy Oil Water-blending Gathering and Transportation Process in Ji 7 Well Block

吉7井区为新疆油田公司第一个稠油冷采示范区,地面集输采用井口掺水工艺,原油处理采用两段热化学大罐沉降工艺。吉7井区回掺水工艺的应用有效解决了井区稠油地面集输问题,但随着产能建设规模的扩大,南部高黏度原油区域已经开始大面积动用,稠油地面集输的可行性还需要理论研究作支撑。因此,需进一步对高黏度稠油流变性能进行深入研究,明确高黏度稠油的黏温曲线,确定高黏度原油的集输工艺,并对高含水井无法停掺的问题进行深入分析,进一步优化掺水集输工艺,降低回掺水量。通过对原油处理系统进行优化,降低了处理系统能耗,并使处理系统能力满足产液需求。

Ji 7 Well Block is the first heavy oil cold production demonstration area of Xinjiang Oilfield Company.The wellhead water blending process is adopted for surface gathering and transportation,and the"two-stage thermochemical tank settling"process is adopted for crude oil treatment.The application of water back blend process in Ji 7 Well Block effectively solves the problem of heavy oil surface gathering and transportation.However,with the expansion of production capacity construction scale,the high viscosity crude oil area in the south starts to be used in a large area,and the feasibility of heavy oil surface gathering and transportation needs theoretical research as support.Therefore,the rheological properties of high-viscosity heavy oil are further studied,the viscosity vs temperature curve of highviscosity heavy oil is defined,and the gathering and transportation process of high viscosity crude oil is determined.In addition,an in-depth analysis is carried out on the problem that high water-bearing wells cannot stop mixing,so as to further optimize the gathering and transportation process of water blending and reduce the back mixing amount.By optimizing the crude oil treatment system,the energy consumption of the treatment system is reduced,and the capacity of the treatment system can meet the demand of liquid production.