公开(公告)号：US5461562A

公开(公告)日：1995-10-24

申请号：US263505

申请日：1994-06-21

申请人： Jacques R. Tabanou ,  J. N. Antoine

发明人： Jacques R. Tabanou ,  J. N. Antoine

IPC分类号： G01V3/38 ,  E21B49/00 ,  G06F17/00

CPC分类号： G01V3/38

摘要： A new interpretation system receives a low resolution log and a high resolution log from a well logging tool that is disposed in a wellbore which traverses a highly laminated formation and generates an output record medium which clearly illustrates and quantifies each layer of the plurality of layers of the laminated formation. In response to receipt of the low and high resolution logs, the new interpretation system generates a rectangular deconvolved log. The rectangular deconvolved log is generated by first selecting a plurality of modes or possible formation types from a histogram. Each of the plurality of modes are then solved, in a least squares sense, by minimizing the sum, over a particular depth interval in the wellbore, of the square of the residual between the tool measurement and the reconstructed log, a calculation which is equivalent to solving a system of N equations and N unknowns. A basis function is determined for each mode, and the rectangular deconvolved log is defined to be the sum of the basis function for each mode multiplied by the calculated value of the associated mode derived from the solution of the N equations and N unknowns. The rectangular deconvolved log is subsequently convolved with a vertical response function of the well logging tool thereby producing a reconstructed log. The reconstructed log undergoes interactive refinement producing a refined rectangular deconvolved log. If no further refinement is needed, a volumetric analysis is performed on the refined rectangular deconvolved log to produce an output record medium which clearly illustrates and quantifies each layer of the plurality of layers of the laminated formation traversed by the wellbore.

摘要翻译： 新的解释系统从测井工具接收低分辨率日志和高分辨率日志，该测井工具设置在穿过高度层压的地层的井筒中，并产生输出记录介质，其清楚地示出和量化多层的每层 层压结构。 响应于收到低分辨率和高分辨率的日志，新的解释系统生成一个矩形解卷积的日志。 通过首先从直方图中选择多个模式或可能的形成类型来生成矩形解卷积。 然后，通过在工具测量和重建的对数之间的残差的平方的最小值在井眼中的特定深度间隔上最小化和来解决多个模式中的每一个，等效的计算 解决N个方程和N个未知数的系统。 确定每个模式的基函数，矩形解卷积日志被定义为每个模式的基函数的乘积乘以从N个方程和N个未知数的解得到的相关模式的计算值。 随后，用测井工具的垂直响应函数卷积矩形解卷积，从而产生重建的对数。 重建的日志经历交互式细化，产生精确的矩形去卷积日志。 如果不需要进一步细化，则对精制的矩形解卷积进行体积分析以产生输出记录介质，其清楚地示出并量化由井筒穿过的层叠地层的多个层的每一层。