论文详情
复杂断块、复杂岩性、复杂地层油藏受复杂断裂体系、岩性和地层尖灭或剥蚀的影响,准确合理地开展地层对比难度大。油田现场的地质分层数据往往沿用不同历史时期测井资料解释的结果,存在着不同程度的错误分层问题,因此,在老油田重构地下层位认识体系很有必要。以大港王徐庄油田为例,在总结井震联合分层方案和细分层统层对比准则的基础上,建立了声波引导地震约束模式控制等时地层对比技术,将声波时差曲线引入到地质分层工作之中,提高了含钙质较高、致密或含有较大泥岩段储层地质分层的品质。井震联合等时地层对比技术的应用,有效地提高了大港王徐庄油田地质分层的精度,为复杂油藏开展细分层和不同层系单独分层提供了新的技术手段。
Since complex fault block reservoir,complex lithologic reservoir and complex stratigraphic reservoir are dominated by complex fracture system,lithology,and strata pinching-out or erosion,accurate and reasonable stratigraphic correlation in these reservoirs is challenging.Geological stratification database is usually established on the interpretations of logging data at different times and some errors and inaccurate interpretations may be generated due to the data quality and human factors.Therefore,it is necessary to reconstruct the underground stratigraphic recognition system for mature oilfields.We focus on Wangxuzhuang oilfield in Dagang oilfield.The isochronous stratigraphic correlation with sonic log characteristic guidance,seismic horizon constraint and well log mode control is established based on the conclusion of well logging-seismic data stratification scheme and subdivision strata comparison principles.Sonic logs are introduced to the geological stratification,which significantly help to better understand the reservoir geology characteristic,especially for those reservoirs with high content of calcium,tight formation,or large shale section.This technique not only effectively improves the accuracy of geological stratification in Wangxuzhuang oilfield,but also provides a novel method for the correlation refinement of complex reservoirs and division of different layer system.
国家科技重大专项(2016ZX05010-001)资助。