水平井随钻电磁波响应特征分析及应用实例  

Characteristics Analysis and Application of Electromagnetic Response in Horizontal Wells

作　　者：胡松[1] 周灿灿[1] 王昌学[1] 李华阳[1] 袁超[1] 孔强夫 

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《地质科技情报》2014年第6期180-186,共7页Geological Science and Technology Information

基　　金：国家科技重大专项"复杂储层油气测井解释理论方法与处理技术"(2011ZX05020-008);中国石油天然气集团公司测井前沿技术与应用基础研究项目(2011A-3901)

摘　　要：随着致密油气非常规油气的大规模勘探开发,水平井数量增长较快,但仪器的响应方式与直井存在较大差别,尤其是电阻率,因此必须弄清楚水平井中随钻电阻率仪器的响应规律才能较好地进行水平井资料解释。通过数值模拟分析,系统模拟了随钻电阻率受层界面、围岩、各向异性以及相对井斜角变化的响应特征,总结了水平井中随钻电阻率的响应规律。结果表明,随钻电阻率受围岩层厚及各向异性影响最为严重,频率越高,各向异性和围岩影响越大。根据这些特征结合实际资料,依托交互式正反演技术,精细确定井眼轨迹与地层空间关系,从而对射孔试采方案的设计进行指导。With the large scale exploration and development of unconventional tight oil and gas,has caused the rapid growth of the number of horizontal wells,but the way of instrument response is different from vertical wells,especially for the resistivity.It is necessary to have a good understanding of the response of resistivity drilling instruments in horizontal wells to do better data interpretation.Through numerical simulation analysis,the paper simulated the response characteristics of LWD resistivity systematically,which was affected by layer interface,surrounding rock,anisotropy and relative deviation angle,the results showed that the LWD resistivity was most severely affected by layer thickness,surrounding rock and anisotropic,and the higher the frequency,the greater the influence.According to these characteristics and the actual data,relying on interactive inversion technology,determined the space relationships between well trajectory and the formation finely and then guided the design of perforation test scheme.

关 键 词：随钻电磁波 电阻率 响应特征 数值模拟 水平井 交互式正反演 

分 类 号：P618.13[天文地球—矿床学]