川东北元坝地区致密砂岩油气地质特征  

Petroleum geology of the tight sandstone reservoirs in Yuanba area of northeast Sichuan

作　　者：印峰[1,2] 盘昌林[1] 杜红权[1] 

机构地区：[1]中石化勘探南方分公司,四川成都610041 [2]同济大学,上海200092

出　　处：《特种油气藏》2012年第2期16-20,135,共5页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"碎屑岩层系大中型油气田富集规律与勘探关键技术"项目(2008ZX05002-004)

摘　　要：随着川东北油气勘探的迅速发展,中浅层油气藏逐渐成为油气增储上产的重要接替阵地之一。根据钻探成果以及化验资料分析,川东北元坝地区中浅层油气藏具有低孔、低渗的特点,且横向展布范围大,有效储集层受岩性和物性的控制。同时利用测井资料和地震解释成果对该区油气藏成藏机理进一步分析,表明元坝地区中浅层油气藏为致密砂岩油气藏及其多次运移的结果,渗透率级差、孔隙连通性决定着该类型油气藏的富集规律。元坝地区致密砂岩油气藏的发现对于进一步扩大川东北油气勘探的胜利成果和建立川东北油气资源的接替阵地有着十分重要的意义。With the fast going of oil and gas exploration in northeast Sichuan province,mid-shallow reservoirs are important for adding to reserves and boosting production.Drilling data and laboratory analysis indicate that the mid-shallow reservoirs in Yuanba area of northeast Sichuan are characterized by low porosity and low permeability,extensively distributed laterally,and are dominated by lithology and physical property.The mechanism of hydrocarbon accumulation in this area has been analyzed by using logging data and seismic interpretation results.It shows that the mid-shallow reservoirs in Yuanba area are tight sandstone reservoirs which had experienced multiple migrations;and the enrichment of oil and gas in such reservoirs are subject to permeability ratio and pore connectivity.The discovery of the tight sandstone reservoirs in Yuanba area is of important significance for further expanding oil and gas exploration and securing substitutive oil and gas resources in northeast Sichuan.

关 键 词：元坝气田 致密砂岩 成藏机理 油气地质 

分 类 号：TE122.1[石油与天然气工程—油气勘探]