CAJ | 학술논문

塔河油田4区奥陶系油藏单井单元经过历年多轮次注水替油,油水界面不断抬升,多数已进入失效阶段,剩余油在构造高部位聚集,形成所谓的“阁楼油”.在注气驱替“阁楼油”的理论基础上,为进一步提高塔河4区采收率,选择具有独立缝洞结构,前期注水替油效果较好且目前已失效的单井单元,进行注氮气开发.目前注气采油在塔河4区仍处于实验阶段,仅选取TK404、T415CH、T416及TK489井小范围试注,以TK404井为例,通过对注气量、闷井时间、注气采油方式、注气速度进行优化,总结出合理的注气方法;通过对注气后生产动态变化情况的分析,得出注气提高采收率在塔河4区切实可行的结论.
탑하유전4구오도계유장단정단원경과력년다륜차주수체유,유수계면불단태승,다수이진입실효계단,잉여유재구조고부위취집,형성소위적“각루유”.재주기구체“각루유”적이론기출상,위진일보제고탑하4구채수솔,선택구유독립봉동결구,전기주수체유효과교호차목전이실효적단정단원,진행주담기개발.목전주기채유재탑하4구잉처우실험계단,부선취TK404、T415CH、T416급TK489정소범위시주,이TK404정위례,통과대주기량、민정시간、주기채유방식、주기속도진행우화,총결출합리적주기방법;통과대주기후생산동태변화정황적분석,득출주기제고채수솔재탑하4구절실가행적결론.
After more than a calendar year round water injection, Tahe oilfield No.4 district Ordovician reservoirs single well unit oil-water interface is continuous lifting of oil, the majority has entered the stage of failure, the remaining oil in the structural highs gathered to form a so-called"attic oil". Based on the theory of gas injection alternate"attic oil", and in order to further enhance the recovery efficiency of Tahe oilfield No.4 district, it carries out chooses nitrogen gas injection development by choosing independent wewing hole structure,better effect for pre-injection and current failed single well unit. At present, gas injection oil recovery is still in the experimental stage in Tahe oilfield No.4 district, only selecting TK404, T415CH, T416 and TK489 well small-scale injection, and taking TK404 well for example, through the optimization ofgas injection, bored wells time, ways of gas injection oil recovery and speed of gas injection, the reasonable methods of gas injection were summed up; and by the analysis of produce dynamic changes condition after gas injection, it obtained the conclusion that gas injection improves oil recovery in Tahe oilfield No.4 district.