长春岭南区储层特征研究

Reservoir Characteristics in South Changchun Lingnan Area

长春岭背斜带地处松辽盆地的东南隆起处,研究区位于长春岭背斜带,构造位置位于朝阳沟阶地大榆树鼻状构造西翼,其北为朝阳沟阶地,东南为长春岭背斜带,长春岭南区位于两个二级构造单元的转折部位。断层以及圈闭发育,主要形成于河流相沉积环境。长春岭南区扶余油层是其主力储层,埋深浅,深度范围660~880 m。针对长春岭南区储层特征研究,通过三维地震解释手段,利用岩心资料对长春岭南区储层特征进行研究,并精细刻画预测长春岭南区扶余油层上中下个油层组对应的砂体展布。结果表明:长春岭南区扶余油层岩性主要是不等粒混杂型碎屑硬质长石混合砂岩,分选中-好,砂体厚度大,砂体全区均有发育,能为其浅层气成藏提供了良好的储集条件。

Changchun Lingnan area anticlinal belt is located in the southeast uplift of Songliao Basin. The study area is located in Changchun Lingnan area anticlinal belt. The structural location is located in the West Wing of Dayushu nose-like structure on Chaoyanggou terrace. The north is Chaoyanggou terrace,the southeast is Changchun Lingnan area anticlinal belt,and the south of Changchun Lingnan area is located at the turning point of two secondary structural units. Faults and traps are mainly formed in fluvial sedimentary environment. Fuyu oil layer in South Changchun Lingnan area is its main reservoir with shallow burial depth and a depth range of 660 ~ 880 meters. In this paper,based on the reservoir characteristics of South Changchun Lingnan area,the reservoir characteristics of South Changchun Lingnan area are studied by means of three-dimensional seismic interpretation and core data. The corresponding sand body distribution of the upper,middle and lower reservoir groups of South Changchun Lingnan area Fuyu oil layer is delicately depicted and predicted. The results show that the lithology of Fuyu oil layer in South Changchun Lingnan area is mainly unequal-grained mixed clastic hard feldspar mixed sandstone with medium-good sorting,including large thickness of sand body and development of sand body in the whole area,which can provide good reservoir conditions for shallow gas reservoir formation.