断控岩溶体系空间结构差异性与三维建模——以顺北1号断裂带为例  

Hierarchical Characteristics and 3D Modeling of Fault-controlled Paleokarst Systems:A Case Study of Shunbei1 Strike-slip Fault Zone

作　　者：张文彪 段太忠[2] 赵华伟[2] 马琦琦 鲍典 ZHANG Wen-biao;DUAN Tai-zhong;ZHAO Hua-wei;MA Qi-qi;BAO Dian(School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China;Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China;Sinopec Northwest Oilfield Company, Urumqi 830011, China)

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国石化石油勘探开发研究院,北京100083 [3]中国石化西北油田分公司,乌鲁木齐830011

出　　处：《科学技术与工程》2021年第28期12094-12108,共15页Science Technology and Engineering

基　　金：中国科学院战略先导A项目(XDA14010204);中国石化科技部项目(P20064-2)。

摘　　要：断控岩溶体系空间结构差异性制约该类油藏高效开发。以顺北1号断裂带为例,综合地震构造解释、储层预测、钻井及生产特征信息,按照规模从大到小的层次关系,从断裂分段、断溶体分割、油气充注以及缝-洞连通性4个角度阐述了各层次差异体的成因及特征,通过三维地质建模的方式再现了各层次差异体分布规律及相互关系,并讨论了下步攻关方向。结果表明:走滑断裂沿走向具有交互分段性,分段性差异形成宽窄不一的地层破碎体;以破碎体为基础,溶蚀改造强弱不同导致断溶体出现横向及纵向分割,且分割性存在强弱变化;受断裂通源性影响,断溶体与深大断裂构成不同强度的油气充注体;缝-洞多种组合关系及裂缝连通强度进一步加剧了断溶体储层内部的非均质性。断控岩溶体系层次建模的思路展现了不同差异体之间的控制关系,但对于各层次差异体之间的耦合规律尚需进一步探索。研究结果对于提升断控岩溶体系理论认识及指导油藏开发实践具有借鉴作用。The spatial heterogeneity of fault-controlled paleokarst system restricts the efficient development of this kind of reservoir.Taking Shunbei No.1 fault zone as an example,based on the information of seismic structure interpretation,reservoir prediction,drilling and production characteristics,and in accordance with the hierarchical relationship of scale from large to small,the causes and characteristics of the different bodies at each level from four aspects of fault segmentation,fault-controlled paleokarst segmentation,oil and gas filling and fracture cavity connectivity expounded.Through three-dimensional geological modeling,the distribution law and relationship of different bodies at different levels were reproduced,and the next research direction was discussed.The results show that the strike slip faults are divided into different segments along the strike,and the different segments result in the formation fracture bodies with different width.Based on the formation fracture,the different strength of the corrosion transformation results in the horizontal and vertical segmentation of the paleokarst reservoir.The paleokarst reservoir and deep fault constitute different oil and gas filling bodies due to the influence of fault provenance.The combination of fractures and cavities and the strength of fracture connectivity further aggravate the internal heterogeneity of fault-controlled paleokarst reservoir.The idea of hierarchical modeling of fault controlled Karst system shows the control relationship between different variants,but the coupling law between different variants needs to be further explored.The research results can be used for reference to improve the theoretical understanding of fault controlled paleokarst system and guide reservoir development practice.

关 键 词：走滑断裂 断溶体 缝-洞储层 地质建模 顺北油田 

分 类 号：TE132[石油与天然气工程—油气勘探] P542[天文地球—构造地质学]