非无穷远三极剖面法在新疆F油田的试验效果

非无穷远三极剖面法是一种能在地面直接圈定油气藏边界范围的新型直流电阻率勘探方法，它以油气藏与围岩之间的电阻率差异为依据，其理论基础是等位面与电流线处处正交。在新疆F油田做了非无穷远三极剖面法的野外试验。试验结果表明，该方法能够有效地发现那些与围岩具有明显电阻率差异，其规模相对埋深足够大的各种类型油气藏，可以比较准确地圈定其边界范围，确定油气层的埋藏深度，在一定条件下还可较准确地划分复杂异常中单个含油砂体油水分界面。这次试验为非无穷远三极剖面法在新疆乃至其他地区的推广应用积累了宝贵经验。已显示出其良好的推广应用前景。

THE TEST RESULT OF NON-BOUNDLESS TRIELECTRODE PROFILING METHOD IN F F IELD

The non-boundless trielectrodo profiling method is a new type of DC resistivity explorating method for directly locating the boundary range of reservoir on ground surface, which is based on the resistivity difference between the reservoir and adjacent rocks, its theretical basis is the eqipotential surface being normal to the current lines from place to place. The field test results of thenon- boundless trielectrode section method was implemented in Xinjiang, the test results show that this method can effectively determine those reservoirs being obvious resistivity differences with adjacent rocks and their scales large enough relative to the depth, can more accurately locate their boundary range, determine the buried depth of the hydrocarbon layers, and can more accurately differentiate the oil/water interface of single oil-sandstone in the complicated anomalys, too. This test accumulates valuable experiences for the method being popularized and applied in Xinjiang and other regions, and has displayed its good prospects for popularization and application.