周庄油田戴一段岩性上倾尖灭油藏成因分析
发布时间：2018-11-03 20:17
【摘要】：高邮凹陷周庄油田戴一段油藏存在油藏类型及砂体展布等认识不清的问题,在前人研究的基础上,通过岩心观察和粒度特征分析等研究认为,研究区主要发育扇三角洲沉积,局部发育三角洲沉积。以砂体的展布规律为主要依据的物源方向进行研究认为,周庄地区E2d1沉积时期存在来自吴堡低凸起和北西方向的"双向物源",并利用单一小层的解剖,在E2d11砂组4小层中发现了2个物源交汇处发育的一条砂岩尖灭带。研究区E2d12下段9、10号小层属于岩性上倾尖灭油藏。通过对该油藏类型的新认识,重新预测了砂体的边界,并成功对周15井实施了侧钻,为该油田的滚动扩边提供了方向,初步估算可增加经济可采储量超过60×104t。
[Abstract]:In Zhouzhuang Oilfield, Gaoyou Depression, there are some problems with unclear understanding of reservoir types and distribution of sand bodies. On the basis of previous studies, through core observation and grain size analysis, it is concluded that fan delta sediments are mainly developed in the study area. Locally developed delta deposits. On the basis of the distribution of sand bodies, it is concluded that in the E2d1 sedimentary period of Zhouzhuang area, there are "bidirectional provenances" from the low uplift of Wubao and the direction of NW, and the anatomy of the single sublayer is used. A sandstone pinnacle zone developed at the intersection of two provenances has been found in the 4 layers of the E2d11 sand formation. The substrata 9 and 10 of the lower E2d12 in the study area belong to the lithologic updip pinnacle reservoir. Through a new understanding of the reservoir type, the boundary of sand body is repredicted, and the sidetracking of well Zhou15 is successfully carried out, which provides a direction for the rolling expansion of the oil field. The preliminary estimation can increase the economic recoverable reserves by more than 60 脳 10 ~ 4 t.
【作者单位】： 中国石化江苏油田分公司;
【基金】：中国石化科技攻关项目“小断块油藏油水过渡带提高采收率技术研究”(P13125)
【分类号】：P618.13
本文编号：2308909
[Abstract]:In Zhouzhuang Oilfield, Gaoyou Depression, there are some problems with unclear understanding of reservoir types and distribution of sand bodies. On the basis of previous studies, through core observation and grain size analysis, it is concluded that fan delta sediments are mainly developed in the study area. Locally developed delta deposits. On the basis of the distribution of sand bodies, it is concluded that in the E2d1 sedimentary period of Zhouzhuang area, there are "bidirectional provenances" from the low uplift of Wubao and the direction of NW, and the anatomy of the single sublayer is used. A sandstone pinnacle zone developed at the intersection of two provenances has been found in the 4 layers of the E2d11 sand formation. The substrata 9 and 10 of the lower E2d12 in the study area belong to the lithologic updip pinnacle reservoir. Through a new understanding of the reservoir type, the boundary of sand body is repredicted, and the sidetracking of well Zhou15 is successfully carried out, which provides a direction for the rolling expansion of the oil field. The preliminary estimation can increase the economic recoverable reserves by more than 60 脳 10 ~ 4 t.
【作者单位】： 中国石化江苏油田分公司;
【基金】：中国石化科技攻关项目“小断块油藏油水过渡带提高采收率技术研究”(P13125)
【分类号】：P618.13
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