微构造精细表征及在剩余油预测中的应用

提高剩余油的预测精度对进入开发中后期的油田是极为重要的,只有准确预测剩余油的分布,才能通过开发调整提高产量。微构造形态控制着剩余油的分布,其表征精度直接影响着剩余油分布预测的可靠性。海上油田井网不规则且密度较小,仅依靠井点信息难以表征油田的微构造形态。因此探索研究了海上中后期油田的井震,结合精细表征微构造技术。通过研究总结出包括井震精细标定、地震切片识别微构造、精细构造成图等在内的一系列微构造精细表征技术。在海上油田开发调整研究阶段充分应用该技术,对该油田的微构造进行了精细表征,结合生产动态动静结合分析剩余油形成机制,达到提高剩余油分布的预测精度的目标,指导了调整井位的设计。后续新钻调整井证明,微构造形态表征精确,剩余油预测准确,提高了油田的产量。

Microstructure fine characterization and its application in remaining oil prediction

It is very important to improve the accuracy of remaining oil prediction in high water cut oilfield, which can improve production through accurately predicting the distribution of remaining oil. Microstructure controlled the distribution of the remaining oil, and its characterization directly affected the reliability of the prediction of the remaining oil distribution. The well pattern of offshore oil field is irregular and its density is small, so it is difficult to characterize the microstructure of the offshore oil field by the well information. Therefore, the technique is research in high water cut oilfield, which is finely described by using log and seismic data. A series of micro structure fine characterization techniques is formed, which include accurate well-seismic calibrate, seismic slice identification microstructure, precise structure mapping, etc.. The technology was used in the offshore oilfield of development adjustment stage, which finely described the micro structure of oilfield, combined production dynamic to analysis the remaining oil distribution, improved the accuracy of remaining oil prediction, and guided the design of adjusting wells. It is true that micro structure characterization and residual oil prediction were accuracy after adjustment wells drilled, which improve the production of oil.