渤中凹陷L-1井地层地应力预测方法研究  

Prediction and Analysis of Stratum Stress in L-1 Well

作　　者：牛媛 张野 张瀚澎 杜鹏 焦培伦 田盼盼 Niu Yuan;Zhang Ye;Zhang Hanpeng;Du Peng;Jiao Peilun;Tian Panpan(CNOOC EnerTech-Drilling&Production Co.,Tianjin 300452)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《石化技术》2024年第12期223-225,共3页Petrochemical Industry Technology

摘　　要：地应力研究与油气勘探开发有着紧密的联系,为了进一步了解地应力在地层中的分布规律和作用,总结了地应力预测的具体方法,利用测井数据资料计算岩石的力学参数和岩石的抗拉强度,计算地应力,结果表明:L-1井在3721~3740 m层段时,泊松比曲线变化较小,在3760~3800 m,曲线变化较大,在3820~3850 m层段时,曲线趋于稳定,岩石力学参数变化与岩性变化对应良好,符合力学参数规律。预测地层压力系数在2000 m以上井段约为1.00,水平主应力普遍大于垂直主应力;在2721~3740 m的泥质地层段,水平主应力曲线变化不大,该段是由于储层段的地层压力相对较高,从而对水平主应力产生影响;结合地震、测井、地漏实验数据进行地应力计算,与钻后实钻力学参数一致,预测效果良好。In-situ stress research is closely related to oil and gas exploration and development.In order to further understand the distribution law and function of in-situ stress in strata,this paper summarizes the specific methods of insitu stress prediction.The mechanical parameters and tensile strength of rocks are calculated by using logging data.The Poisson’s ratio curve of Well L-1 changes little in the 3721-3740m interval,and greatly in the 3760-3800m interval.The curve tends to be stable in the 3820-3850m interval,and the changes of rock mechanical parameters correspond well with the changes of lithology,which accords with the laws of mechanical parameters.The predicted formation pressure coefficient is about 1.00 in the well section above 2000m,and the horizontal principal stress is generally greater than the vertical principal stress.The horizontal principal stress curve does not change much in the muddy interval of 2721~3740 m,which is due to the relatively high formation pressure in the reservoir segment,which has an impact on the horizontal principal stress.Combined with seismic,well logging and ground drain test data,the ground stress calculation is consistent with the real drilling mechanical parameters after drilling,and the prediction effect is good.

关 键 词：地应力预测 测井资料 岩石力学参数 抗拉强度 

分 类 号：P61[天文地球—矿床学]