In performing gas-prospecting work by means of neutron and density logging in strata with complicated lithology, one often meets with the trouble of multiple solutions caused by the disturbance of complicated lithology if the difference in neutron and density porosities is used alone to indicate gas zones. The logging gas-prospecting model, the calibration formula, the lower limit value of the gas zone and the criteria for verifying gas zones established in this paper have renewed the neutron and density logging gas-prospecting method and can repress the disturbance resulting from complex lithology, thus eliminating the possibility of multiple solutions. Case studies of logging gas-prospecting given in this paper demonstrate that the renewed method can indicate low porosity gas zones in strata with complicated lithology and improve the resolution, direct perceivability and piecision of this method, thus yielding better gas-prospecting results.
出版日期: 1992-02-24
引用本文:
谭廷栋. 中子和密度测井找气方法的更新[J]. 物探与化探, 1992, 16(1): 22-30.
Tang Tingdong. THE RENEWAL OF THE NEUTRON AND DENSITY LOGGING GAS-PROSPECTING METHOD. Geophysical and Geochemical Exploration, 1992, 16(1): 22-30.
[1] 谭廷栋、张志伟:用‘天然气标志’指示气层,石油与天然气地质,第9卷第2期,1988月6月。
[2] 谭廷栋:测井定量解释气层‘两度’的新方程,天然气工业,第1期,1986年3月。
[3] Segesman, F. and Liu O., The Excavation Effect, Paler Vii, SpwLA Annual Spmposium, 1971.