柴达木盆地干柴沟-咸水泉中深层油气成藏条件

The characteristic and condition about oil-gas accumulations in the mid-deep formation in Ganchaigou-Xianshuiquan region of Qaidam Basin

目的探究柴达木盆地干柴沟—咸水泉地区中深层油气的成藏条件,寻找有利的勘探目标层。方法充分利用野外剖面进行观测,结合室内岩心及油气样分析化验以及地震解释、测井处理等多种资料和手段,在地层沉积和构造特征分析的基础上,系统分析干柴沟—咸水泉地区中深层的储层特征、烃源岩特征、石油性质、油源变化和油气运聚条件。结果区内源岩较发育,生烃能力较强,储盖组合较好,具备形成中小规模油气藏的潜力。结论干柴沟构造G2号圈闭和咸水泉构造X2号圈闭是下步勘探的有利方向。

Aim To analyze petroleum exploration potential in mid-deep formation in Ganchaigou-Xianshuiquan Region of Qaidam basin. Methods With field profile survey, laboratory core and crude oil sample analysis, seismic interpretation,well logging etc, based on the features of formations, deposition and structure, systematic evaluation was made on the features of reservoirs, source rocks, and their relationships, and oil surce rock correlation around the whole northwestern region of Qaidam basin. Results This region possesses the potential of forming small-sized oil or gas reservoirs due to the developed hydrocarbon source rock with strong hydrocarbon generating capacity and the good reservoir-caprock association condition. Conclusion The G2 trap in Ganchaigou Region, the X2 trap in Xianshuiquan Region may be promising targets for next exploration.