微构造精细表征及在剩余油预测中的应用

摘要

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 con-trolled 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 de-velopment 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 adjust -ment wells drilled , which improve the production of oil .%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。