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砂糖状白云岩(简称云岩)是指那些晶粒粗大(品粒直径大于0.1毫米)的细晶、中晶、粗晶云岩和各种晶粒化了的残余结构云岩。由于它具有晶粗、疏松、多孔诸特点,是理想的油气储集岩。所以,近年来油气矿藏研究者一直视为掌上明珠。西南地区寻找碳酸盐岩储集层,砂糖状云岩已成为主攻对象。事实上,已发现的上二叠统长兴组、下二叠统阳新组气藏和钻井显示良好的中、上寒武统储集层,绝大多数都存在于砂糖状云岩层段中。让数据说话通过2000多个岩石油层物理分析得知,无论从成分上来说,从结构上来讲,从有孔薄片机遇率(可见
Sugar-like dolomite (referred to as dolomite) refers to those coarse grains (grain diameter greater than 0.1 mm) fine, medium, coarse crystalline dolomite and a variety of grain structure of the residual dolomite. Because of its coarse crystal, loose, porous features, it is the ideal oil and gas reservoir rock. Therefore, in recent years, oil and gas reservoir researchers have always regarded as the pearl of the palm. Looking for carbonate reservoirs in the southwest, sugar-laden dolomite has become the main target. In fact, the gas reservoirs and wells of the Upper Permian Changxing Formation and the Lower Permian Yangxin Formation that have been discovered have shown that most of the Middle and Upper Cambrian reservoirs are present in the granulose-lacustrine intervals. Letting the Data Speak Through the physical analysis of more than 2,000 rock layers, it is clear from the compositional point of view that from the porosity,