地质工程一体化在剩余油高效挖潜中的实践及效果——以塔里木盆地YM32白云岩油藏为例

Application of geology-engineering integration in high-efficiency remaining oil potential tapping and its results:a case study on YM32 dolomite oil reservoirs in Tarim Basin

YM32油田白云岩储层结构复杂,油藏剩余油分布类型多样、高含水后难治理,给油田实现高效稳产开发提出了挑战。对此,引入地质工程一体化理念,探索了一条针对剩余油挖潜的"嵌入型"地质工程一体化的实施路线,工程人员"嵌入"地质研究团队中。针对不同剩余油分布地质模式,联合制订出周期注氮气吞吐、水平井地质导向侧钻技术等挖潜措施;并在工程实施过程中,综合油藏地质、地球物理、钻井、试采等多学科知识和工程资料,不断调整和完善工程技术方案,实现裂缝孔隙型白云岩油藏剩余油的经济开发和效益开发,已如期建成40×104t/a产能规模,目前原油产量已连续稳产4年。地质工程一体化理念在YM32油田剩余油挖潜中的实践经验,对其他同类型油藏高效开发具有较好的借鉴意义。

Dolomite reservoirs in the YM32 Oilfield are structurally complex and the remaining oil is distributed in various patterns and can hardly be treated at the stage of high water content, resulting in challenges to the efficient and steady development of the oilfield. In this paper, the concept of geology-engineering integration was introduced to explore a practical way of ＂embedded＂ geology-engineering integration for remaining oil potential tapping by ＂embedding＂ the engineering staff into the geology research team. A series of potential tapping measures, such as the cyclic nitrogen huff and puff and the horizontal-well geosteering sidetracking, were proposed jointly for different geological patterns of remaining oil distribution. In the process of engineering implementation, the engineering technology program was adjusted and improved continuously by comprehensively analyzing multi-disciplinary knowledge and engineering data, including oil reservoir geology, geophysics, drilling and testing. Eventually, the remaining oil in fractured-porous dolomite reservoirs was developed with economic benefits. The productivity of 40×104 t/a was constructed as the schedule and the production of crude oil has been stable for 4 years. The application of geology-engineering integration in the remaining oil potential tapping of YM32 Oilfield provides the valuable reference for the efficient development of other similar oil reservoirs.