塔里木盆地轮南奥陶系风化壳SYT法物性探测试验研究

ＳＹＴ型物性探测仪自从１９９２年石油系统使用之后，先后在陕北，华北，吉林，大庆油田取得了一定的试验效果，在仪器硬件和方法软件不断改进的基础上，在塔里木盆地轮南地区又进行了深为５７００余米的探测试验，其界面探测精度误差为０．５％～１．２％，在地面上直接解译奥灰顶界面深度，奥灰风化壳裂隙性岩溶发育程度，判译地下油气有等方面，无疑这将会大大降低对油气勘探投资的风险系数，塔里木盆地轮南奥灰风化壳ＳＹＴ法试

STUDY ON THE DETECTION TEST OF PHYSICAL PROPERTY BY SYT METHOD IN ORDOVICIAN WEATHERED CRUST IN LUNNAN,TARIM BASIN

Since the detector of physical property of SYT type used in petroleum industry in 1992,some test effects had been obtained successively from the northern Shaanxi,North China,Jilin and Daqing oil fields. On the basis of improving continuously the instrument hardware and method software,a detection test with the depth more over 5700m is conducted in Lunnan area of Tarim Basin. The error of detection accuracy of its boundaries ranges from 0 5 to 1 2%. The depth of top boundary of Ordovician limestone and the development degree of fissured karst in Ordovician weathered crust are interpreted,and the presence of oil and gas underground is determined directly on surface,no doubt,the risk factor of investment on oil and gas exploration would be decreased largely. After the multiple tests in different localities in past six years,the study by SYT method in Ordovician weathered crust in Lunnan area of Tarim Basin proves again that this geophysical exploration method is scientific. Especially,when the mean number,a new mathematical theory,was used to the data interpretation of oil and gas exploration by SYT method,the interpretation accuracy of this method and the rigor of data analysis were increased further. This paper introduces the study results of this test in order to understand deeper this geophysical exploration method.