摘要
井间电磁 (EM)成像系统的技术目标是实现井间电学特性的直接测量 ,并提供井间电阻率的二维及三维图像 .从 1 997年开始 ,胜利油田与美国EMI公司合作 ,开展了EM技术的应用与研究 ,主要是通过大型、系统的现场试验 ,在大井间距的条件下 ,进一步验证仪器的性能 ,进行油藏研究的适用性和可行性分析 ;以系统的现场实测数据为依据 ,加快成像处理方法和软件的开发 ;开展穿透金属套管井的EM试验 ,探讨金属套管条件下的电阻率成像方法。两年来 ,利用EMI提供的XBH2 0 0 0型测量系统 ,对胜利油田典型的低电阻率砂泥岩剖面 ,成功地进行了 3对井、1 0个井次的试验。试验证明了仪器性能的可靠 ,取得了测量重复性好、系统完整的井间EM数据 .并反演得到电阻率成像 ,在分析井间油气分布和油层开采动态方面 。
The main technological objective of crosshole EM tomography is to realize direct electrical measurements between wells and acquire 2D or 3D resistivity images reflecting hydrocarbon and water distribution between wells. A co operation and joint study between Shengli Oilfield of China and EMI Company of USA for the application method of crosshole EM system has being gone on since 1997. The cooperation comprises of the following aspects: to examine further the performance of the tools and explicit improvement direction, to analyse the adaptability and the feasibility to reservoir research through large scale and systematic field tests in the condition of large well separation, to accelerate the development of processing and interpretation method and its software based on systematic field data to carry on systematic tests in steel cased boreholes and explore the imaging method of resistivity in the condition of steel casing. In November 1998, June and July 1999, large scale industrial field tests with 10 measurements in 3 pairs wells were successfully conducted in the low resistivity profile in Shengli Oilfield. Firstly, the formation is of typical low resistivity profile with the background resistivity of 1.5—2.0Ωm. The attenuation of the EM energy in the formation is very serious. Secondly, the field tests were conducted systematically passing through one and two steel casing. The desired goals were achieved in the three tests. Not only is the performance of the tools proved to be stable and reliable, but also complete crosshole EM data with good repeatability and accuracy were acquired for the first time in the world between the wells with the separation of 434m of open hole to open hole and 150m of open hole to casing hole. The resistivity images derived from the data inversion shows good geological results in the analysis of hydrocarbon distribution and reservoir recovery states between wells.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第3期411-420,T002,T003,共12页
Chinese Journal of Geophysics
基金
中国石油化工集团总公司基金!(KZD2 1 9970 0 7)
