基于多段井模型的非均质储层水平井分段动用政策研究

The Policy Research of Horizontal Well Segmented Utilization in Heterogeneous Reservoir Based on Multi-segment Well Model

受储层非均质性的影响,水平井生产过程中内部动用的差异性,严重影响了其开采效果.为了使采出能够最大化和均匀化,需要对水平井进行分段动用.利用考虑井筒变质量流与油层中渗流耦合的多段井模型,将不同钻遇情况的井筒分段离散化,对水平井分段动用政策界限进行了研究.研究表明：在水平井钻遇单层时,好差段同时动用效果最好,极差大于5时,这种动用优势体现更明显;在钻遇多层时,先动用物性较差层段,达到中含水期阶段,动用物性较好层段可以获得最好开采效果,极差在2～10时,这种动用方式体现的最好.通过实际井组动用效果的分析,说明这一分段动用政策对新钻水平井的开采设计具有一定的指导意义.

Affected by the impacof reservoiheterogeneity, horizontal wellutilized within the production procesdifferences, seriously affectthe developmenof it, in ordeto maximize the recovery and homogenization, the need fohorizontal well segmented utilization. By using multi-segmenwell model which couplethe reservoiand horizontal well variable masflow dynamics, through discrete segmented of differendrilling situations, the hor- izontal well utilization policy limitare studied, the research showthat： When horizontal well drilling in monolay- er, simultaneously utilize both good and bad segmenithe best, and when permeability grading greatethan 5, which reflectthe more obviouadvantages; When well drilling multiple layers, firsutilize poolayers, during the middle watecustage, then utilize bettelayercan gethe besproduction, and when permeability grading from 2 to 10, iithe besutilization to use. Through the actual well group＇production showthe segmented utilization policy can providecertain guidance fonew drilling horizontal wells.