摘要
港东断裂是歧口凹陷北部的一条重要的控藏断裂。为了研究歧口凹陷港东断裂位置的沙一下亚段油气分布规律,根据转换输导油气形式分两种情况研究:通过港东断裂在沙一下亚段内输导部位、沙一中亚段区域性泥岩盖层封闭部位和沙一下亚段连通砂体分布部位,取三者重合部位预测港东断裂向沙一下亚段砂体完全转换输导油气形式的分布部位;通过港东断裂在沙一下亚段内输导部位、沙一中亚段区域性泥岩盖层不封闭部位、沙一下亚段连通砂体分布部位和上覆明化镇组区域性泥岩盖层封闭部位,取四者重合部位预测港东断裂向沙一下亚段砂体部分转换输导油气形式的分布部位。结果表明:港东断裂向沙一下亚段砂体完全转换输导油气形式分布部位主要为其东部和西部,而部分转换输导油气形式分布部位主要为其中部,少量分布在其东部局部。港东断裂向沙一下亚段砂体完全和部分转换油气形式分布部位控制了港东断裂位置的沙一下亚段内油气在整条断裂内的分布。
Gangdong fault is a critical reservoir-controlling fault in the north of Qikou sag.In order to study the oil and gas distribution of Sha-1 Lower Submember in the Gangdong fault of Qikou sag,there are two cases of oil and gas transporting forms recognized:The distribution position of the entire oil and gas transporting form from the Gangdong fault to the Sha-1 Lower Submember sand body was predicted based on the overlapping of the following three key factors,the transport site of the Gangdong fault in Sha-1 Lower Submember,the regional mudstone cap sealing site of Sha-1 Middle Submember,and the connected sandbody distribution site of Sha-1 Lower Submember.The distribution position of the partial oil and gas transporting form from the Gangdong fault to the Sha-1 Lower Submember sand body was predicted based on the overlapping of the following four key factors,the transport location of Gangdong fault within Sha-1 Lower Submember,the unsealed location of regional mudstone cap of Sha-1 Middle Submember,the distribution location of connected sandbodies of Sha-1 Lower Submember,and the overlying regional mudstone cover of Minghuazhen Formation.The results show that:The entire oil and gas transporting form is mainly distributed in the east and west,while partial oil and gas transporting form is mainly distributed in the middle and locally in the east.The distribution position of the entire and partial oil and gas transporting form controls the distribution of the entire oil and gas fault in Sha-1 Lower Submember of Gangdong fault.
作者
张金宝
Zhang Jinbao(Exploration Department,Daqing Oilfield Co.,Ltd.,Daqing 163453,Heilongjiang,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2023年第5期1352-1361,共10页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(41872157,42072157)。
关键词
歧口凹陷
港东断裂
沙一下亚段
砂体
转换输导油气形式
分布部位
Qikou sag
Gangdong fault
Sha-1 Lower Submember
sand body
oil and gas transporting form
distribution position
