摘要
由于塔河油田碳酸盐岩缝洞型油藏具有极强的非均质性,实施多井缝洞单元注水开发过程中存在对井间连通性认识不清的问题,极大地影响了注水开发的效果。通过对判识碳酸盐岩缝洞型油藏连通性的地震属性进行优选,确定的最大曲率属性在反映碳酸盐岩缝洞型油藏微断裂和裂缝的发育程度、描述垂向上的非连续性以及表征裂缝的线型特征等方面均优于相干和地震倾角属性。因此,利用最大曲率属性识别和描述微断裂—裂缝体系,追踪大尺度裂缝的延伸方向,并结合振幅梯度属性,刻画缝洞连通体的空间形态。在碳酸盐岩缝洞型油藏多井缝洞单元注水开发过程中,最大曲率属性可以清晰地反映微断裂—裂缝体系的空间分布,确定其与溶洞的空间组合关系,为井间静态连通性的判定提供依据;利用多种地震属性刻画的缝洞连通体,可以指导注采井部署和优化注采关系;根据追踪的大尺度裂缝连通的主方向,可以预测注水受效方向。
Due to the strong heterogeneity of Tahe oilfield fracture-vug carbonate reservoir, there exists some factors greatly influencing the effect of the unit waterflooding development, such as the fuzzy understanding of fracture-cave body distribution between wells and large scale fracture channel connectivity in injection layers. Through a comparative analysis of the characteristics of seismic curvature, using the seismic reflection angle, discontinuity and maximum curvature attributes, the seismic facies, images' micro fracture-fracture system were analyzed. The fissure-cave connected spatial form was depicted. The extending direction of the large scale fracture was tracked. When waterflood is performed in the fracture-vug reservoir, the depicted fracture-cave connectivity distribution can guide the deployment of the injection and production wells and optimize their relationship; based on tracking the trend of large-scale crack, the main direction of waterflooding can be predicted. Through the application in the field, the geological basis for fracture-vug reservoir in injection and production wells can be provided and their deployment can be optimized. The establishment of the network of injection and production wells and prediction of effective direction of water injection can be realized.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2014年第6期65-67,71,共4页
Petroleum Geology and Recovery Efficiency
基金
国家"973"计划"碳酸盐岩缝洞型油藏开采机理及提高采收率研究"(2011CB201005)
国家科技重大专项"塔里木盆地大型碳酸盐岩油气田开发示范工程"(2011ZX05049)
关键词
缝洞型油藏
注水开发
微断裂—裂缝体系
最大曲率属性
塔河油田
Tahe oilfield
fracture-vug reservoirs
waterflood development
micro-fracture-fracture system
the maximum curvature properties
