坳陷湖盆缓坡重力流成因储集层沉积特征及发育条件--以准噶尔盆地腹部石南31井区为例  

Sedimentary Characteristics and Developing Conditions of Gravity Flow-Genetic Reservoirs in Ramp Margins of Depression-Lacustrine Basin——An example from Wellblock Shinan-31 in hinterland of Junggar basin

作　　者：任小军[1] 于兴河[1] 李胜利[1] 石新璞[2] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]中国石油新疆油田分公司勘探开发研究院,新疆克托玛依834000

出　　处：《新疆石油地质》2008年第3期303-305,共3页Xinjiang Petroleum Geology

摘　　要：石南31油田是准噶尔盆地腹部石南地区近年来发现的一个大型岩性油气藏,其地层属于白垩系清水河组一段的K1q11砂层组,发育于坳陷湖盆缓坡构造背景下,储集层沉积类型认识存在争议。通过岩心观察并结合地震资料分析,认为石南31井区地层具备发育重力流沉积的必要条件,论证了坳陷湖盆在具备沟谷、阶地的特定古地貌特征以及充沛的物源等条件下是可以发育重力流沉积的。Shinan-31 Wellblock is a large lithologic oil-gas reservoir discovered in Shinan area in hinterland of Junggar basin in recent years. Its petroliferous strata around the ramp margins of depression-lacustrine basin belong to the K1q1^1 sand layer of Qingshuihe formation of Cretaceous. But there has been controversial on the sedimentary facies type of the reservoir. The core observation and seismic information analysis suggest that in Shinan-31 Wellblock possesses the necessary conditions for forming gravity flow sediments. It is coneluded that in the conditions of valley, terrace and plentiful mass supplementation, gravity flow sediments can develop in the depression-lacustrine basin.

关 键 词：准噶尔盆地 坳陷湖盆 缓坡 石南31井区 重力流沉积 

分 类 号：P512.2[天文地球—地质学] TE122.3[石油与天然气工程—油气勘探]