CAJ | 학술논문

大港探区歧口凹陷西南缘沙一段下部发育白云岩储层与油页岩互层产出，是大港油田重要的增储领域之一。该区白云岩储层薄，裂缝发育，整体具有连片的特点。在测井曲线上表现为“三低两高”特征，即AC、GR和CN呈现低值状态，DEN和RT呈高值显示。通过分析可知研究区大部分井的 AC、DEN、GR、RT任意一种曲线都无法准确、清晰地识别白云岩。为此，利用白云岩在不同曲线上的反应特征，通过不同的数学模型，将白云岩的特征曲线值适当放大；同时，尽可能压低非白云岩岩性的曲线值，重构出一条拟声波曲线，利用稀疏脉冲地震反演技术进行储层预测，从而有效识别白云岩储层的空间分布，取得了很好的应用效果。
대항탐구기구요함서남연사일단하부발육백운암저층여유혈암호층산출，시대항유전중요적증저영역지일。해구백운암저층박，렬봉발육，정체구유련편적특점。재측정곡선상표현위“삼저량고”특정，즉AC、GR화CN정현저치상태，DEN화RT정고치현시。통과분석가지연구구대부분정적 AC、DEN、GR、RT임의일충곡선도무법준학、청석지식별백운암。위차，이용백운암재불동곡선상적반응특정，통과불동적수학모형，장백운암적특정곡선치괄당방대；동시，진가능압저비백운암암성적곡선치，중구출일조의성파곡선，이용희소맥충지진반연기술진행저층예측，종이유효식별백운암저층적공간분포，취득료흔호적응용효과。
In the southwest margin of Qikou sag of Dagang exploration area ,dolomite reservoirs an d oil shale cross layer output ,in the lower part of first member of Shahejie formation ,are one of the most important increase storages in Dagang oil field .The characteristic of the dolo-mite in logging curve is”three low two tall ” .The values of AC , GR and CN are low and the values of DEN and RT are high .Through the analysis AC , DEN , GR , RT of most study wells ,none of the curves can identify the dolomite accurately and clearly .The reaction characteristics of dolomite on different curves are used ,through the different mathematical models ,to make the curve value of dolomite’s characteristic appropriate magnification .At the same time ,the curve value of non dolomite’s is made minimum low to reconstruct Pseudo -acoustic wave .Sparse pulse inversion technique is used to predict the reservoir and recognize dolomite reservoir space distribution effective-ly .It is of very good effect .