高陡构造异常高压上限计算方法研究  

CALCULATION METHODS FOR UPPER LIMIT OF ABNORMAL HIGH PRESSURE IN HIGH-STEEP STRUCTURE

作　　者：赵凯[1] 邓金根[1] 蔚宝华[1] 谭强[1] 范白涛 刘小刚 王名春 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室 [2]中海石油(中国)有限公司天津分公司钻井部 [3]中海油研究总院

出　　处：《钻采工艺》2011年第6期11-13,5,共3页Drilling & Production Technology

摘　　要：地层孔隙压力是石油勘探、开发设计与施工的基础数据,地层孔隙压力的精确预测能够对钻井参数的选择以及井身结构的设计提供更加准确的数据,尤其对异常地层压力的预测,对钻井的实际施工具有更加重大的意义。常规的地层孔隙压力预测方法仍主要集中于欠压实因素导致的异常压力计算,对于构造挤压因素导致的异常压力计算方法研究,目前仍处于探索阶段。从力学角度出发,建立孔隙结构力学稳定模型,结合测井资料,详细分析高陡构造应力—异常孔隙高压体系中孔隙结构的力学稳定性,得出异常高压上限,为钻井设计及施工提供依据。与传统方法相比,该方法考虑了构造挤压因素的影响,不需要建立正常压实趋势线,有较好的适应性和精确度。Formation pore pressure is the basis data of petroleum exploration, development design and construction, accurate prediction of formation pore pressure can offer more accurate data for drilling parameter choice and hole structure design, especially for the prediction of abnormal pressure, which has more important significance. The conventional prediction methods of pore pressure were paid attention on the theory of under balance compaction. For the high pressure in high-steep structure, the calculation methods were still in exploring stage. From the standpoint of mechanics, establishing the mechanical stable model of pore structure and combining with logging data, then through detailed analysis of the mechanical stability of pore structure, the upper limit of abnormal high pressure could be calculated. Compared with the conventional methods, new method has more accuracy and applicability, because of which considered the structure extrusion factor and didn't establish the normal compaction trend line.

关 键 词：异常高压 孔隙压力 构造挤压 孔隙结构 力学稳定 

分 类 号：TE21[石油与天然气工程—油气井工程]