复合热载体吞吐后开采方式的研究

发布时间：2018-01-08 12:08

本文关键词：复合热载体吞吐后开采方式的研究　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：萨北油田自从上世纪七十年代投入开发以来,已进入高含水期,产量递减速速快,且非均质性严重。该区块曾开展过蒸汽吞吐、烟道气吞吐、聚合物驱等试验,但是效果均不理想。通过室内研究发现,复合热载体具有较好的作用,在相同实验条件下,比蒸汽吞吐、烟道气吞吐能够提高采收率5%以上。因此,作为一项储备技术亟需进行吞吐后开采方式的研究。本文在模拟地层的条件下,针对该区块进行了复合热载体吞吐后开采方式的研究,通过在室内开展大量的驱替实验来分析在复合热载体吞吐的基础上,水驱、蒸汽驱、CO2+N2驱以及复合热载体驱替的驱油效果,最后确定合理的开采方式。通过室内物理模拟实验,注入的复合热载体让原油物性变好,降低原油粘度和残余油饱和度,使原油更易被采出,从而提高地层原油采收率。复合热载体吞吐三周期后转水驱、蒸汽驱的的采收率最高,虽然水驱的注入能力低,但是由于该区块属于中高渗地层,适合常规水驱,且蒸汽驱的成本高。从气油比来看,水驱、蒸汽驱突破之前的气油比最低,气油比越高,说明采出同样多的油需要注入的气体越多,开采成本相对越高。因此,复合热载体吞吐后的最佳开采方式为水驱。因此,复合热载体吞吐后的最佳开采方式为水驱。通过对注复合热载体吞吐技术的研究以及转驱之后的驱替实验研究,表明在萨北过渡带地区实施转驱是可行的,也为今后进一步扩大复合热载体的应用领域提供了实验依据。
[Abstract]:Since its development in -30s, Sabei Oilfield has entered a period of high water cut, the output deceleration speed is fast, and the heterogeneity is serious. The block has carried out steam huff and puff, flue gas huff and puff, polymer flooding and so on. But the effect is not ideal. Through laboratory research, it is found that the composite heat carrier has a better effect, under the same experimental conditions, compared with steam huff and puff, flue gas huff and puff can increase oil recovery by more than 5%. As a reserve technology, it is urgent to study the post-huff and puff mining methods. In this paper, under the condition of simulating the formation, a study on the post-huff and puff mining mode of the complex heat carrier is carried out for the block. A large number of displacement experiments were carried out in laboratory to analyze the oil displacement effects of water flooding, steam flooding, CO2 N2 flooding and composite heat carrier flooding on the basis of complex heat carrier huff and puff. Through laboratory physical simulation experiments, the injected composite heat carrier can improve the physical properties of crude oil, reduce the viscosity and saturation of residual oil, and make the crude oil more easy to be extracted. So as to improve the oil recovery. After three cycles of heat carrier huff and puff, steam flooding has the highest recovery efficiency, although the injection capacity of water flooding is low, but the block belongs to medium and high permeability formation. It is suitable for conventional water flooding, and the cost of steam flooding is high. In water flooding, the ratio of gas to oil before steam flooding is the lowest, and the higher the ratio of gas to oil is, the more gases need to be injected to produce the same amount of oil. The higher the mining cost is, therefore, the best mining method after huff and puff of composite heat carrier is water drive. The optimum exploitation mode after huff and puff of composite heat carrier is water drive. Through the research on the technology of injection heat carrier huff and puff and the experimental study of displacement after the transfer drive, it is proved that it is feasible to carry out the flooding in the transitional zone of the northern part of the province. It also provides experimental basis for further expanding the application field of composite heat carriers in the future.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357

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