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大安寨一亚段储渗体主要发育在碳酸盐岩浅湖中的高能介屑滩灰岩中。高能介屑滩灰岩是形成储渗体的物质基础 ,重结晶作用和溶蚀作用使岩石变松、变脆和易于破裂 ,发育溶孔、洞、缝 ;两次大的挤压应力作用 ,产生两组共扼剪切构造裂缝 ,在构造高部位和构造变异部位会沿这些剪切裂缝产生重张缝和追踪张裂缝 ,极大的改善了储集性能 ;断裂是储渗体中油气运移的重要通道。强振幅、高波阻抗是识别厚层、质纯灰岩的重要标志 ;高突变系数对储渗体孔洞缝的发育特别敏感 ,是识别储渗层的重要参数。在此基础上运用多参数综合判别法对川北柏垭地区大安寨一亚段储渗体进行了分布预测 ,预测结果得到钻井验证
The Da’anzhai-1 Member of the Permian reservoir mainly develops in the high-energy crust litter of limestone in carbonate shallow lakes. High-energy crustal tidal flat limestone is the material basis for the formation of reservoir and infiltration body. The recrystallization and dissolution cause the rock to become loose, brittle and easy to rupture, with the development of dissolved pores, holes and cracks. The two large compressive stresses produce Two sets of conjugate shear structural fractures, in the structure of high positions and structural variation along the shear cracks will produce a number of cracks and cracks Zhang Zhang, greatly improving the reservoir performance; fracture is a reservoir of migration of oil and gas migration Important channel. Strong amplitude and high impedance are the important symbols to identify thick and pure limestone. The high mutation coefficient is particularly sensitive to the development of pores and pores in the reservoir. It is an important parameter to identify the reservoir. On the basis of this, the multi-parameter synthetic discriminant method was used to predict the distribution of the infiltration body of the first member of the Da’anzhai section in the Baiya area of the Chuanbei area, and the prediction results were verified by drilling verification