影响孔隙压力预监测成功率的关键因素分析  

Key factors affecting the success rate of pore pressure prediction and monitoring

作　　者：王志战 

机构地区：[1]页岩油气富集机理与有效开发国家重点实验室 [2]中国石化石油工程技术研究院测录井研究所

出　　处：《录井工程》2018年第1期1-3,108,共3页Mud Logging Engineering

基　　金：国家重大专项"低渗透油气藏高效开发钻完井技术"(编号:2016ZX05021)

摘　　要：准确识别与评价地层压力,无论在钻前、钻中还是钻后,均被地质界与工程界普遍重视。地层压力预监测中通常只把压实趋势线的准确选取作为精度控制的唯一关键因素是远远不够的,因为压力封存箱由外到内的压力突变、多种压力成因机制的相互叠加、压力检测手段响应特征的多解性、多套压力系统的纵向叠置等因素所影响的不仅是预监测的精度,甚至会导致地层压力预监测的结论错误。基于对这些关键因素的剖析制定可行的对策,对夯实孔隙压力预监测的理论基础、完善地层压力预监测模型、提高预监测的成功率与准确率有重要作用。Abnormal high pressure is the power of oil and gas output,and the resistance of drilling safety.Accurately identifying and evaluating formation pressure,whether during the pre-drilling,drilling or post-drilling,have been highly valued by both the geology and engineering.The prediction and monitoring of formation pressure usually takes the accurate selection of the compaction trend line as the only key factor of precision control,which is far from enough.The factors such as the pressure jump from the outside to the inner of the pressure storage tank,the stacking of various pressure generation mechanisms,the multi-solvability of response characteristics of pressure detection means,and the longitudinal superposition of multiple sets of pressure systems not only affect the precision of the prediction and monitoring,but also lead to the error of the prediction and monitoring of the formation pressure.By analyzing these key factors and formulating corresponding countermeasures,it plays an important role in tamping the theoretical basis of pore pressure prediction and monitoring,improving the prediction and monitoring model of formation pressure,and enhancing the success rate and accuracy of prediction and monitoring.

关 键 词：地层压力 封存箱 预监测 成功率 多解性 突变 

分 类 号：TE132.1[石油与天然气工程—油气勘探]