基于复合岩溶区地质模式的缝洞储集体建模——以塔河十二区S94CH井区为例  

Modeling of fractured-cave reservoir body based on geological model of composite karst area:taking S94CH well area of Tahe12 block as an example

作　　者：何世伟 董越 程洪 袁飞宇 宋传真[2] HE Shiwei;DONG Yue;CHENG Hong;YUAN Feiyu;SONG Chuanzhen(No.2 Oil Production Plant,Northwest Oilfield Company,SINOPEC,Kuqa 842000,China;Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 102206,China)

机构地区：[1]中国石化西北油田分公司采油二厂,新疆库车842000 [2]中国石化石油勘探开发研究院,北京102206

出　　处：《断块油气田》2024年第6期998-1005,共8页Fault-Block Oil & Gas Field

基　　金：中石化科技部项目“塔河探明未动用储量开发潜力研究(二期)”(P24220)。

摘　　要：塔河十二区复合岩溶区缝洞型碳酸盐岩储层油气资源丰富,但岩溶控制因素复杂,储集体发育的结构模式不清,地质精细表征及建模难度较大。基于多元、多尺度资料,建立了复合岩溶区岩溶地质模式,并提出了“结构约束、层次建模、分类融合”的建模思路。结果表明:按照成因、规模、配置关系,将复合岩溶区储集体划分为暗河、断控、不整合3个结构体系。暗河结构体系具有暗河轮廓和内部充填2个层次,断控结构体系具有断控岩溶带轮廓和内部溶洞、断裂2个层次。储集体轮廓层次规模较大,可采用基于雕刻的确定性方法构建分布模型;内部层次采用确定性加随机模拟的方法,在地质、地震概率约束下构建模型。以塔河十二区S94CH井区为例,融合三维地质模型体现了空间结构体系特征,与动态数据较为吻合。The fractured-cave carbonate reservoir of composite karst area in Tahe12 block is rich in oil and gas resource,but the karst control factors are complex,the structure model of reservoir body development is unclear,and the geological fine characterization and modeling are difficult.Based on multiple and multi-scale data,the karst geological model of the composite karst area is established,and the modeling idea of"structural constraint,hierarchical modeling and classification integration"is put forward.The results show that according to the genesis,scale and configuration relationship,the reservoir body of composite karst area can be divided into three structural systems:underground river,fault-controlled and unconformity.The underground river structural system has two levels:the outline of the underground river and the inner filling,and the fault-controlled structural system has two levels:the outline of the fault-controlled karst zone and the inner karst cave and fault.Because of the large level scale of the reservoir body outline,the distribution model can be constructed by the deterministic method based on engraving.At the inner level,the model is constructed under the geological and seismic probability constraints by the method of deterministic and stochastic simulation.Taking the S94CH well area of Tahe Oilfield as an example,integrating three-dimensional geological model reflects the characteristics of the spatial structure system and is in good agreement with the dynamic data.

关 键 词：结构体系 复合岩溶 地质建模 缝洞储集体 塔河油田 

分 类 号：TE121[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]