柴达木盆地三湖地区岩性气藏分布规律和有利区块预测

柴达木盆地三湖地区第四系的形成是在第三纪末期新构造运动作用下，盆地沉积中心由西向东整体迁移的产物，在第四系中发现了世界上最大的生物气田。近年来三湖地区发现岩性气藏，将现已发现的岩性气（层）藏分为砂岩上倾尖灭型、砂岩透镜体型和物性侧向变化型3种。并提出岩性气藏分布规律是：分布于北斜坡，依附于构造背景，位于k9标志层以下，赋存于薄层砂体中，限于一定的深度范围内。根据分布规律，提出三湖地区岩性气藏的有利勘探区块，为研究区下一步进行岩性气藏勘探提供了理路依据和现实依据。

Distribution Regularities and Favorable Exploration areas of Lithologic Gas Reservoir in Sanhu Area,Qaidam Basin

The occurrence of the Quaternary in Sanhu area of Qaidam basin,which has trapped the largest biologic gas field,is the product of migration of basin depositional center from west to east under the tectonic movements at the end of Tertiary.In recent years,lithologic gas reservoirs have been found in this area and been divided into three types including sand updip pinch-out,sand lens and sand property change in the lateral direction.The distribution regularities of lithologic gas reservoirs in the Sanhu area ...