渤中凹陷深层高压井地质工程一体化技术研究与应用  

Research and Application of Integrated Geological Engineering Technology for Deep High-Pressure Wells in the Bozhong Sag

作　　者：李战奎 吴立伟 郭明宇 徐鲲 马福罡 李文龙 LI Zhankui;WU Liwei;GUO Mingyu;XU Kun;MA Fugang;LI Wenlong(Engineering Technology Branch,CNOOC EnerTech-Drilling&Production Co.,Tianjin,300452,China;Tianjin Branch of CNOOC Ltd.,Tianjin,300459,China)

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 [2]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《石油钻探技术》2024年第2期194-201,共8页Petroleum Drilling Techniques

基　　金：中海石油(中国)有限公司“七年行动计划”重大科技专项“渤海油田上产4000万吨新领域勘探关键技术(编号:CNOOCKJ135 ZDXM36 TJ 08 TJ)”部分研究成果。

摘　　要：渤海湾盆地渤中凹陷深层潜山地质条件复杂,目的层埋藏深,钻遇地层层位多,岩性复杂多变,地层压力系统变化大,钻井过程中复杂情况频发,薄弱层易漏失,影响勘探开发进程。为此,研究了钻前井漏风险预测及地层压力校正,钻中高压段中完科学决策、潜山界面精确卡取和潜山地层压力随钻识别与控制等方面的技术,实现了钻井设计及随钻调整方案优化,形成了渤中凹陷深层高压井全过程地质工程一体化技术。渤海油田20口深层高压探井应用全过程地质工程一体化技术后,钻井复杂情况降低了60%,井漏、溢流等复杂情况处理时间缩短了40%,潜山界面识别准确率100%,单井钻井成本降低3000万元以上。全过程地质工程一体化技术为渤海油田深层超深层勘探开发提供了技术途径,具有较好的应用前景。The geology of the deep buried hills in the Bozhong Sag of the Bohai Bay Basin are complex,with deep burial of the target layer,multiple geological layers encountered during drilling,complex and variable lithology,and significant changes in the formation pressure system.During the drilling process,complex situations frequently occur,and weak layers are prone to leakage,which affects the exploration and development process.By predicting the risk of wellbore leakage before drilling,correcting formation pressure,making scientific decisions in the high-pressure section during drilling,accurately capturing the buried hill interface,and identifying and controlling the formation pressure of the buried hill while drilling,the drilling design and adjustment plan optimization during drilling were achieved,and an integrated geological engineering technology for the whole process of deep high-pressure wells in the Bozhong Sag was established.After the application of the integrated geological engineering technology throughout the whole process in 20 deep high-pressure exploration wells in Bohai Oilfield,the drilling complexity was reduced by 60%,and the processing time for complex situations such as wellbore leakage and overflow was reduced by 40%.The accuracy of identifying buried hill interfaces was 100%,and the cost of a single well was reduced by more than 30 million yuan.The integrated geological engineering technology for the whole process provides a technical approach for deep and ultra-deep exploration and development of Bohai Oilfield,and it has good application prospects.

关 键 词：渤中凹陷 深层 风险预测 随钻优化 全过程 地质工程一体化 

分 类 号：TE242[石油与天然气工程—油气井工程]