摘要
中子和密度测井在复杂岩性地层中找气，如果只用中子和密度孔隙度差异性质指示气层，由于复杂岩性的干扰，容易出现多解性。本文建立的测井找气模型、刻度公式、气层下限值、指示和验证气层法则，更新了中子和密度测并找气方法，能够压制复杂岩性的干扰，排除多解性。文中给出的测井找气实例表明，采用更新后的测井找气方法指示低孔隙度复杂岩性气层，提高了中子和密度测井指示气层的分辨率、直观性和准确性，从而获得了更好的找气效果。
Abstract
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.
出处
《物探与化探》
CAS
CSCD
1992年第1期22-30,共9页
Geophysical and Geochemical Exploration
