BH复杂断块油田水平地应力的测井计算方法  

Log Calculation Method of Horizontal In-Situ Stress in BH Complex Fault Block Oilfield

作　　者：王淼 刘晓健 宿雯 夏宏泉[2] 胡南[3] 赖礼梁 WANG Miao;LIU Xiaojian;SU Wen;XIA Hongquan;HU Nan;LAI Liliang(Bohai Oilfield Research Institute,Tianjin Branch of CNOOC LTD.,Tianjin 300452,China;Petroleum Engineering School,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Dean’s Office of Southwest Petroleum University,Nanchong Campus,Nanchong,Sichuan 637001,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300452 [2]西南石油大学石油与天然气工程学院,四川成都610500 [3]西南石油大学南充校区教务部,四川南充637001

出　　处：《测井技术》2024年第1期27-34,共8页Well Logging Technology

基　　金：中国海洋石油有限公司前瞻基础项目“渤海海域重点地区应力研究方法优化探索”(KJQZ-2022-2001)。

摘　　要：地应力的大小和方向对油气田勘探开发工程有重要意义,其中水平地应力的精准计算是关键。BH油田断裂构造发育,地应力状态复杂多变,常用的水平地应力计算模型适应性较差。充分考虑BH油田复杂断块特征,结合岩石力学-地应力同步联测实验结果,分析了断层各要素对水平地应力的影响程度,由此建立了断层对水平两向地应力大小的影响因子K_(H)和K_(h)估算方法,在此基础上改进得到了适用于复杂断块构造的水平地应力计算模型:BH模型。利用此模型和测井资料可实现连续准确地计算工区不同层位的水平地应力,其地应力计算精度不但优于传统模型,而且能够很好地满足钻井和压裂等工程需求。The magnitude and direction of in-situ stress has great significance to oil and gas exploration&development engineering,and the accurate calculation of horizontal in-situ stress is the key.The fault structure is developed in Bohai oilfield,the state of in-situ stress is complicated and changeable,and the commonly used model for calculating horizontal in-situ stress has poor adaptability.Based on the characteristics of complex fault blocks in BH oilfield and the results of rock mechanics and in-situ stress simultaneous measurement,the influence degree of various fault elements on the horizontal in-situ stress is analyzed,and the influence factor K_(H) and K_(h) estimation method of fault on the magnitude of in-situ stress are established.On this basis,the horizontal in-situ stress calculation model(BH model)suitable for complex fault block structure is improved.Using BH model and logging data,the horizontal in-situ stress of different layers in the working area can be calculated continuously and accurately.The calculation accuracy of in-situ stress is not only better than the traditional model,but also can meet the need of drilling and fracturing engineering.

关 键 词：断层影响因子 水平地应力 BH模型 测井计算 BH断块油田 

分 类 号：P631.84[天文地球—地质矿产勘探]