松辽盆地安达地区泉头组四段沉积特征与油气分布关系

SEDIMENTARY CHARACTERISTICS AND OIL-AND-GAS DISTRIBUTION IN MEMBER 4 OF QUANTOU FORMATION, ANDA AREA, SONGLIAO BASIN

赵波 冯子辉 梁江平

Zhao Bo Feng Zihui Liang Jiangping

中国石油与天然气股份有限公司, 大庆油田有限责任公司, 勘探开发研究院, 黑龙江, 大庆, 163712

Research Institute of Petroleum Exploration and Development, Daqing Oil Field, PetroChina, Daqing, Heilongjiang 163712, China

通过岩心观察、相标志和测井相研究表明,松辽盆地安达地区泉头组四段主要发育三角洲平原和三角洲前缘2种亚相,进一步划分为分流河道、分流河道间、决口扇、水下分流河道、水下分流河道间和席状砂6种微相。应用高分辨率层序地层学原理和方法,把安达地区泉头组四段分为1个长期旋回、6个中期旋回和10个短期旋回层序。K1q4-sq1和K1q4-sq2层序中主要发育三角洲平原亚相沉积,K1q4-sq3层序中主要发育三角洲前缘亚相沉积。综合分析D25,DS401等7口钻井资料认为,该区主要储层为分流河道和水下分流河道砂体,上覆沉积的青山口组一段泥岩构成良好的烃源岩和盖层。

Researches of core samples,main facies markers and well logging facies have indicated that,2 main subfacies(delta plain and delta front) generate in the Member 4 of Quantou Formation,Anda area,the Songliao Basin.6 microfacies are further classified: distributary channels,interdistributary bays,crevasse splays,subaqueous distributary channels,subaqueous interdistributary bays and sheet sand.Using high-resolution stratigraphic theory and research methods,the Member 4 of Quantou Formation in Anda area is divided into 1 long-term sequence cycle,6 medium-term sequence cycles and 10 short-term sequence cycles.Delta plain subfacies develop in sequence K1q4-sq1 and K1q4-sq2,while delta front subfacies develop in sequence K1q4-sq3.According to data from 7 wells such as D25 and DS401,main reservoirs in the study area are distributary channels and subaqueous distributary channels facies.Lake facies mud in the Member 1 of Qingshankou Formation works as good source and cap rocks.

国家重点基础研究发展计划(973计划)项目(2006CB701400)

https://doi.org/10.11781/sysydz201001035