准噶尔盆地车91井区石炭系火山岩油藏特征

Characteristics of the Carboniferous volcanic reservoirs in Che-91 wellblock in the Juggar Basin

赵卫军 于浩业 李永航 任军民 董雪梅

Zhao Weijun Yu Haoye Li Yonghang Ren Junmin Dong Xuemei

采用油气藏综合研究方法,对准噶尔盆地车91井区石炭系火山岩油藏进行了分析。研究认为,该井区油藏储层主要岩性为爆发相火山角砾岩,属于孔隙-裂缝双重介质;紧邻油藏之上地层中总有裂缝发育,油藏与裂缝段具有很好的下、上近邻组合特征;油藏类型为受边底水控制的不规则块状油气藏;油藏具良好的保存条件,但在大断裂附近封闭保存条件明显变差,油质变重,油气曾受到氧化作用。最后指出,确定地层中裂缝发育的区域对该区石炭系的油气勘探具有一定的指导作用。

A comprehensive reservoir study method is employed in the analysis of the Carboniferous volcanic reservoirs in Che-91 wellblock.The result indicates that the reservoirs here consist mainly of explosion-breccia and belong to pore-fracture dual porosity reservoirs.There are always fractures developed in formations overlying the reservoirs,showing clear features of excellent assemblage of upper fractured interval and lower reservoir.The reservoirs are irre-gular massive reservoirs controlled by both edge water and bottom water.The preserving conditions for hydrocarbons are favorable but get much poorer when near the major faults,resulting in heavier oil and oxidative environment.Identifying the area with well-developed fractures can guide the hydrocarbon exploration in the Carboniferous of the region.

10.11743/ogg20100116