庆阳气田城探3区块地质特征

Geological Characteristics of Chengtan 3 Block in Qingyang Gas Field

庆阳气田城探3区块位于鄂尔多斯盆地西南部,主体位于伊陕斜坡构造单元。发育西南物源沉积体系,具备基本成藏条件及砂岩岩性气藏规模开发潜力。主要开发目的层系为上古生界二叠系石盒子组盒8段,发育4条主砂带,呈南西—北东向带状展布,划分有利区面积526.8 km^(2)。气田进入开发评价阶段。深入分析城探3区块地质特征,寻求解决气田快速规模上产的地质理论依据,实现城探3区块经济有效开发,具有重要指导意义。

Chengtan 3 block in Qingyang Gas Field is located in the southwest of Ordos Basin,the main body of which is located in Yishan Slope Structural Unit.It developed the source sedimentary system in southwest China,having basic reservoir forming conditions and large-scale development potential of sandstone gas reservoirs.Its main development target belongs to the member 8 of the Shihezi formation of the Permian in the Upper Paleozoic.There are four main sand belts,which are distributed in the southwest-north-east direction in the shape of belts,and the favorable area is mapped out 526.8 km^(2).Chengtan 3 block in Qingyang Gas Field has entered the stage of development evaluation.It is of great significance to analyze the geological characteristics of Chengtan 3 block,to seek the geological theoretical basis for solving the problem of rapid gas field production,and to realize the economic and effective development of Chengtan 3 block.