학술논문
塔里木盆地顺北1号断裂带奥陶系碳酸盐岩储层结构表征及三维地质建模 / Architecture characterization and 3D geological modeling of Ordovician carbonate reservoirs in Shunbei No.1 fault zone,Tarim Basin
Document Type
Academic Journal
Author
陈叔阳; 何云峰; 王立鑫; 尚浩杰; 杨昕睿; 尹艳树; CHEN Shuyang; HE Yunfeng; WANG Lixin; SHANG Haojie; YANG Xinrui; YIN Yanshu
Source
岩性油气藏 / Lithologic Reservoirs. 36(2):124-135
Subject
Language
Chinese
ISSN
1673-8926
Abstract
综合利用地震、测井、岩心以及动态生产资料,对塔里木盆地顺北 1 号断裂带断控型碳酸盐岩储集体的内部结构进行了层级划分;基于层级划分,通过地震资料属性提取与转换、深度学习、基于目标示性点过程模拟以及离散裂缝网络模拟(DFN)等方法建立了三维地质模型,并以模型进行油气储量和油藏数值模拟,将拟合结果与实际生产数据进行对比.研究结果表明:①顺北 1 号断裂带奥陶系断控型储层按层级由大到小分为走滑断裂影响带、断控体、类洞穴、类洞穴内簇充填和裂缝带共 5 个层级.②走滑断裂影响带受应力差异影响具有分段性,可细分为挤压段、拉分段和平移段;断控体在拉分段发育断裂交会型、单支走滑型,在平移段发育双断裂交错型和两断裂交会型,在挤压段发育双断裂扭曲型和双断裂交会型,共有 6 种平面组合样式;类洞穴在地震剖面上呈串珠状反射特征;类洞穴内部分为栅体与栅间(基岩),其中栅体又可进一步分为簇(角砾带)、簇间(裂缝带),整体表现为栅状结构,簇的物性更好;裂缝带为类洞穴的主要储集空间,在簇内部比簇间更发育,在一间房组比鹰山组更发育,一间房组和鹰山组均以发育高角度裂缝为主,在两者连接处则以发育水平缝为主.③地质模型预测的油气储量与地质分析储量误差为 1.75%,模型模拟的生产井地层压力及累产液结果与生产动态吻合度较高,拟合误差小于10%.
Based on the seismic,logging,core and dynamic data,the internal architecture of fault-controlled carbonate reservoirs in Shunbei No.1 fault zone of Tarim Basin was divided.Based on the hierarchical division,a 3D geological model was established through seismic data attribute extraction and conversion,deep learning,target-based schematic point process simulation,and discrete fracture network simulation(DFN).Numerical simulation of oil and gas reserves and reservoirs was carried out with the model,and the fitting results were com-pared with the actual production data.The results show that:(1)The Ordovician fault-controlled reservoirs in the study area were categorized into five levels,from large to small,including strike-slip fault-influenced zones,fault-controlled bodies,cave-like,intra-cave-like cluster-filling and fracture zones.(2)The strike-slip fault-influenced zones has segmentation due to stress differences,which can be subdivided into extrusion section,pullout section and translation section.The fault-control bodies develop six kinds of planar combination styles,including fault intersection type and single-branch slip type in the pullout section,double-fault staggered type and double-fault intersection type in the translation section,and double-fault twisted type and double-fault inter-section type in the extrusion section.The cave-like is characterized by bead-like reflections on the seismic sec-tion.The intra-cave-like is divided into fenestration and inter-fenestration(bedrock),and the fenestration can be further divided into clusters(breccia zones)and inter-clusters(fracture zones),and the whole is characterized by fenestration structure,with better physical properties of the clusters.The fracture zones are the main reservoir space for cave-like structures,which are more developed within clusters than between clusters,and more devel-oped in Yijianfang Formation than in Yingshan Formation.High-angle fractures are mainly developed in Yijian-fang Formation and Yingshan Formation,while horizontal fractures are mainly developed at the joints between the two.(3)The error between the oil and gas reserves predicted by the geological model and the geological analysis reserves is 1.75%.The simulated production well formation pressure and cumulative liquid production results of the model are highly consistent with production performance,with a fitting error of less than 10%.
Based on the seismic,logging,core and dynamic data,the internal architecture of fault-controlled carbonate reservoirs in Shunbei No.1 fault zone of Tarim Basin was divided.Based on the hierarchical division,a 3D geological model was established through seismic data attribute extraction and conversion,deep learning,target-based schematic point process simulation,and discrete fracture network simulation(DFN).Numerical simulation of oil and gas reserves and reservoirs was carried out with the model,and the fitting results were com-pared with the actual production data.The results show that:(1)The Ordovician fault-controlled reservoirs in the study area were categorized into five levels,from large to small,including strike-slip fault-influenced zones,fault-controlled bodies,cave-like,intra-cave-like cluster-filling and fracture zones.(2)The strike-slip fault-influenced zones has segmentation due to stress differences,which can be subdivided into extrusion section,pullout section and translation section.The fault-control bodies develop six kinds of planar combination styles,including fault intersection type and single-branch slip type in the pullout section,double-fault staggered type and double-fault intersection type in the translation section,and double-fault twisted type and double-fault inter-section type in the extrusion section.The cave-like is characterized by bead-like reflections on the seismic sec-tion.The intra-cave-like is divided into fenestration and inter-fenestration(bedrock),and the fenestration can be further divided into clusters(breccia zones)and inter-clusters(fracture zones),and the whole is characterized by fenestration structure,with better physical properties of the clusters.The fracture zones are the main reservoir space for cave-like structures,which are more developed within clusters than between clusters,and more devel-oped in Yijianfang Formation than in Yingshan Formation.High-angle fractures are mainly developed in Yijian-fang Formation and Yingshan Formation,while horizontal fractures are mainly developed at the joints between the two.(3)The error between the oil and gas reserves predicted by the geological model and the geological analysis reserves is 1.75%.The simulated production well formation pressure and cumulative liquid production results of the model are highly consistent with production performance,with a fitting error of less than 10%.