摘要
在鄂尔多斯盆地西南部长6油层组的半深湖-深湖亚相中发育有大量的浊积岩,构成该地区主要储层类型,成为油气勘探的重要区域。其以薄互层的形式出现,具有分布不稳定、隐蔽性强的特点。文章从沉积构造、砂体结构、电性和地震反射等方面总结了浊流沉积的特征,采用地质、测井与地震相结合的技术手段,预测了长6油层组浊积砂体的平面分布特征。研究表明,长6油层组浊积砂体的空间展布形态及其发育规模存在2个明显区带:①华庆地区白豹—华池一带的缓坡型浊积岩,平面呈规模较大的层状体;②正宁—合水地区陡坡型浊积岩,平面呈规模较小的朵状、扇状。
Turbidite is widely developed in the bathal-abysmal lake subfacies of Chang 6 oil reservoir for-mation in the southwestern ordos Basin. The trubidite constitutes main reservoirs in this area and is the important oil-gas exploration target, it is characterized by thin interbeds and irregular distribution thus tends to be disguised. This paper summarizes characteristics of the turbitite with respect of its sedimenta-ry structure, structure of sand body, electric property and seismic reflection. Data of geology, logging and seismic survey are combined to predict plan distribution of the turbitite. Results show two obvious turbi-dire zones varied in spacial extension and and size of sand body： ①Baibao-Huachi zone in Huaqing area whose turbitite was deposited on gentle slope with larger size of layeroid sand body in plan;②Zhengning-hesui zone whose turbidite deposited on steep slope with smaller size of sand body in flower and fan shape in plan.
出处
《地质找矿论丛》
CAS
CSCD
2012年第3期349-354,共6页
Contributions to Geology and Mineral Resources Research
基金
国家重大专项"大型油气田及煤层气开发"项目(编号:2008ZX05000-003-01)资助
