二次开发效果评价及调整部署技术研究——以新海27块为例

Evaluation and research on redevelopment response and reconciliation technique: a case study with Xinhai 27 block

综合运用动态分析、数值模拟、油藏工程等方法,系统评价新海27块二次开发实施效果,认识到二次开发虽然取得较好的效果,但是由于段间差异造成水平井段动用不均,且新增储量未充分动用,因此仍具有一定的剩余潜力,提出了二次开发部署意见及调整方向。经现场实施后获得初步效果,新投产水平井初期日产油为10 t/d以上,断块日产量恢复到280 t/d,为全面实现二次开发指标提供了有力的技术支撑,对于进一步完善二次开发技术体系具有重要的指导意义。

Performance analysis,numerical simulation and reservoir engineering methods are comprehensively applied to systematically evaluate the redevelopment response for Xinhai 27 block.It is conceded that redevelopment does have good response,but reserves have been produced unevenly along horizontal section due to reservoir heterogeneity,therefore there is still certain residual oil potential,and suggestions are proposed for redevelopment reconciliation.Field application has achieved preliminary effect,with initial oil production over 10 t/d from new horizontal well and block production resumed to 280 t/d,thereby provided robust technical support for fully realizing redevelopment index and further improving technological system.