利用地震资料约束测井进行岩石物性解释

测井解释中结合地震资料来解释岩石物性能大大地降低解释的不确定性。反复进行测井曲线校正,岩石物性解释,岩石物理正演和合成记录匹配,确保P波和密度测井能真实地反映测量深度段的岩性。测井解释中结合地震资料的关键是确保岩石物性解释和建立的岩石物理模型的一致性。本文讨论澳大利亚西北海岸Exmouth Sub盆地Scarborough气田地震约束测井进行岩石物性解释的应用实例。Scarborough气田中老井的测井曲线受到钻井泥浆侵入的影响非常严重,必须对测井曲线进行校正,改善测井质量。用校正后的测井曲线建立岩石物理模型,通过岩石物理正演合成记录,反复进行岩石物性、岩石物理和合成记录匹配,得到与地下情况相一致的最终解释,降低储层解释的不确定性。

Interpretation of Physical Rock Properties by Using Seismic-Control Well Logging

To use well logging interpretation combined with seismic data to interpret physical rock properties can reduce interpretative uncertainty greatly.Repeated log correction,physical rock properties interpretation,forward rock physics and composite recording matching can ensure that P wave and density logging reflect hthologies of the measuring interval veritably.The key in well logging interpretation combined with seismic data is to ensure the consistency between physical reck properties interpretation and establishment of the rocks physics model. The paper discusses an example of the apphcation in Scarborough gas field of Exmouth Sub basin of Australian northwest coast.Logs of the old wells in Scarborough gas field are badly effected by the invasion of drilling mud and must be corrected to improve the well logging qual- ity.Through forward rock physics,composite recording,repeated physical rock properties,rocks physics and composite recording matching. we can get the final interpretation which is coincident with the underground situation with the rock physical model after log correction.It reduces the interpretative uncertainty to the reservoirs.