歧口凹陷海水基钻井液条件下测井综合评价方法  

Comprehensive Evaluation Method of Logging Data in Seawater Base Mud Condition of Qikou Sag

作　　者：刘俊东 李进 窦如胜 袁雪花[2] 卓坤 朱伟峰[2] LIU Jundong;LI Jin;DOU Rusheng;YUAN Xuehua;ZHUO Kun;ZHU Weifeng(Tianjin Branch, China National Logging Corporation, Tianjin 300280, China;Institute of Exploration and Exploitation, Dagang Oilfield, Tianjin 300280, China)

机构地区：[1]中国石油集团测井有限公司天津分公司,天津300280 [2]大港油田公司勘探开发研究院,天津300280

出　　处：《测井技术》2022年第1期77-83,共7页Well Logging Technology

摘　　要：大港油田歧口凹陷长期大规模使用高矿化度的海水基钻井液钻井,导致复杂油水关系条件下,受井况及钻井液侵入的影响,储层流体性质识别困难。常规测井评价方法着重于响应特征的变化,在早期勘探过程中取得一定的成效,但其局限性随着勘探开发的逐渐深入也越来越明显;及时测井受钻井进度及钻井液侵入复杂性的影响,其效果很难达到预期。综合利用侵入规律、控制因素、油气恢复等特征分析,结合录井资料建立一套集成电阻率校正法、纵向模式判别法、测录井多参数融合法以及套后测井曲线对比法的海水基钻井液条件下储层测井综合评价技术。该套技术在大港油田生产评价中取得良好的应用效果,多口井试油获得高产,为油田整体开发提供了有效的技术支撑。High salinity seawater based drilling fluid has been used in Qikou Sag of Dagang oilfield for a long time.As a result,it is difficult to identify the reservoir fluid properties under the complicated oil-water relationship conditions and the influence of complex well conditions and mud invasion.Conventional log evaluation methods focus on the change of logging response characteristics,which have achieved some results in the early exploration process,but their limitations have become more and more obvious with the gradual deepening of exploration and development.Affected by the drilling schedule and the complexity of mud invasion,logging is difficult to achieve the expected results.In this paper,a set of integrated resistivity correction method,longitudinal mode discrimination method,logging multi-parameter fusion method and logging curve comparison method for reservoir log evaluation under seawater based drilling fluid condition is established by comprehensively analyzing the characteristics of intrusion law,controlling factors and oil and gas recovery,and combining with logging data.This set of technology has achieved good application effect in the production evaluation of Dagang oilfield,resulting in a number of wells with high production,and provides an effective technical support for the overall development of the oilfield.

关 键 词：海水基钻井液 电阻率校正 纵向模式判别 测录多参数融合 套后曲线对比 

分 类 号：P631.84[天文地球—地质矿产勘探]